Thunderstorms
climbing the
East Sierra
over
Forsyth Peak
Sitting above the Pacific Crest & Tahoe to Yosemite Trails at the Top of Jack Main Canyon in the North Yosemite Backcountry

East Carson River just below PCT under April Snow.

A glimpse at Forsyth Peak in the very Northwest corner of Yosemite National Park under the soft but fierce pastel clouds of a thunderstorm dying as sunset approaches.

Trail Guide Map Miles and Elevations

May 2019

January February March April May June July August September October November December

		Tuesday	Wednesday	Thursday	Friday	Saturday
LAST MONTH NEXT WEEK TOP Last Spring Snow Trips? Once the Spring Thaw gets going the rivers and creeks will rage, making fording very dangerous. REPORT Spring Gear Time to begin stashing the full Winter Gear. We can start lightening up the gear depending on weather. PCT-TYT-JMT HIKERS Time to Carefully Monitor Travel & Fording Conditions SPRING THAW RIVER INFORMATION RESERVOIRS HAZARDS Tracking SPRING THAW 2019 All Snow Information		30 APRIL Clear, Warm Bit Breezy, Nice Transition Spring Gear Kit Lightening Hazard Predictions & Forecasts LAST MONTH NEXT WEEK TOP Seven Day Freezing Temperature Probability SPRING THAW RIVER INFORMATION RESERVOIRS HAZARDS 2018 ROAD NEWS June Lake Loop Closed This Week in 2017 Snow & Temps LAST MONTH NEXT WEEK	1 Clear, Warm Bit Breezy, Nice May Day May Day Note 2019 Current Snowpack: Percent of Average for May 1. N Sierra: 144% =0% in 2 days Cen. Sierra: 147% +2% in 2 days S Sierra: 139% -1% in 2 days Ca State: 143% =0% in 2 days Last Reading April 29 Next Reading May 6 Statewide Summary of Snow Water Content PDF Cal Coop Snow Survey 2017 Readings April 1 April 20 May 2 2018 Snowpack Percent of Average for May 1 +/- change since April 29 Ca State: 27% (-10%) 2019 MAY 1 *HIGH SIERRA* 11th --Spring-- Temp-Snow Check Last Report: April 28, 2019 Next Report: May 7, 2019 Let's check our reporting station snow & temp readings after the last 2 nice, warm, & breezy days but still cooler days. under the persistent High that's built in. Click the stations below for their latest reports. Below: Watershed Snow Water Content Charts followed by individual reporting station's Snow Depth and 24 hour high-low temps. A NEW WATER YEAR: LAST YEAR Total Precipitation 58 % of Average A NEW WATER YEAR: Reservoirs The Thaw: It's Coming N Sierra Reporting Stations On a Map Scroll over stations for snow & temps. Click for full report. South Sierra Stations "+/- & =" below are changes since last reading. Tahoe Basin Watershed Southwest Tahoe Trail Map with Stations PCT-TYT-TRT Rubicon 73" -4 7618 feet Trail Map (45.80 H2O) =0.0 45 & 29 −/− PCT-TYT-TRT Echo Peak 85" -6" 7652 feet Stations Map (63.30 H2O) +0.2 45 & 28 −/− American-Yuba Watersheds PCT-TYT Carson Pass 74" -5 8388 feet Trail Map Stations Map (44.90" H2O) =0.0 47 & 25 −/− Carson-Walker Watersheds PCT-TYT Ebbetts Pass 88" -6 8660 feet Trail Map (60.30 H2O) =0.0 46 & 21 −/− EAST FLANK Leavitt Lake 171" -4 9602 feet, East Flank Trail Map (63.60 H20) =0.0 41 & 20 −/− EAST FLANK Marine Base Cold Weather Training 6748 feet East Flank Trail Map Above FULL REPORT VIS-CHIL-WEA-MB- WIND 68 & 38 −/+ Mokelumne-Stanislaus Watersheds PCT-TYT Sonora Pass Kennedy Meadows RESUPPLY Deadman Creek 31.76" −1.8 9250 feet,West Flank, Trail Map (27.19" H20) -0.06" 43 & 19 −/− Tuolumne-Merced Watersheds Tenaya Lake 68.60 −6.04" 8163 feet, West Flank Trail Map (18.26") H20 =0.0" 48 & 20 −/− JMT-PCT-TYT Tuolumne Meadows 42.28" −5.39" 8600 feet, West Flank Trail Map (6.47") H20 =0.00" 47 & 17 −/− Tioga Pass/Dana 61.07" −3.68 9798 feet Trail Map 13.53 H20 =0.00 43 & 15 −/− Mammoth Mountain Mono Lake-Owens Basin East of PCT-JMT Above Gem Lake Gem Pass 151.00" −0.0 ERROR? 10750 feet Trail Map (00.00 H2O) −32.52 ?? temps bad JMT-PCT Junction Devils Postpile 47.80" −7.5 8004 feet Trail Map Above (0.0) = 48 & 27 −/− NE of JMT-PCT Mammoth Pass 121.15" Sno −5.5 9500 feet Trail Map 38.72" H2O +2.72 ?? 46 & 23 −/− JMT-PCT E of Bear Ridge Volcanic Knob 75.20" −2.8" 10100 feet Trail Map (0.00) 47 & 12 −/− East Flank South Lake Cabin (Snow removed ") 9580 feet, East Flank Trail Map (26.00 H2O) =0.00 50 & 18 −/− East Flank Big Pine Sawmill 41.80" Snow −3.6 10200 feet, East Flank Trail Map Above 42 & 14 −/− Kings River Just East JMT-PCT Bishop Pass --.-- 11972 feet Trail Map Above BAD- BAD Just West JMT-PCT Charlotte Lake 78.13" Snow −2.92 10398 feet, West Flank Trail Map 54.10 H2O +0.57 39 & 14 −/− (Typically the coldest station) Kern Watershed JMT-PCT Upr Tyndall Creek 81.28" −0.89" 11441 feet Trail Map (x.xx" H2O +x.xx") 41 & 24 −/− JMT Crabtree Meadow 33.62" Snow −1" 10,700 feet Trail Map (22.43 H2O) +0.14 42 & 17 −/− All High Sierra Reporting Stations More Stations, by Watersheds	2 Clear, Warm Bit Breezy, Nice THE CURRENT SNOWPACK Current Conditions All Snow Information GRAPHICS Date-Adjustable Multi-Aspect High Sierra Snowpack Status THE 1ST NOAA-NOHRSC SNOWPACK The High Sierra 5-1-19 OBSERVATIONS All High Sierra Reporting Stations Temp & Snow Tables by Watershed and Highway Corridor 2017 Current Snowpack VAST Percent of Average for May 2. N Sierra: 198% Cen. Sierra: 201% S Sierra: 178% Ca State: 194% Compare against previous years. May 2019 Trail News	3 Clear, Warm Bit Breezy, Nice Informative "Normal" Vs. Now Forcasts & Reality vs. Averages Winds? Weather? NorCal Graphics SoCal & SW US Precipitation Quantitative Precipitation Forecasts: RAIN FORECASTS Let's look at the Big Picture The Pacific Ocean Set this for 14 days & Display Loop Below US Weather Map All Maps All High Sierra Weather And the factors creating it 2018 Highway 108 Open May 3, 12:00 Noon	4 Clear, Warm Bit Breezy, Nice CHANGING SMOKE OBSERVATION, INFORMATION, & RESOURCES LAST MONTH NEXT WEEK TOP 2018 Highway 4 Open May 4, 12:00 Noon LAST MONTH NEXT WEEK TOP LAST MONTH NEXT WEEK TOP LAST MONTH NEXT WEEK TOP
Sunday	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday
5 Rising Bluster Bit Breezy, Cooling, Weak Low Passing LAST WEEK NEXT WEEK TOP This Week in 2017 Snow & Temps	6 Blustery Bit Breezy, Cool, Weak Low, Weak Showers *Showers Across Crest* 2019 Current Snowpack: Percent of Average for May 6. N Sierra: 143% −1% in 6 days Cen. Sierra: 143% −4% in 6 days S Sierra: 129% −10% in 6 days Ca State: 138% −5% in 6 days Last Reading May 1 Next Reading May 13 Statewide Summary of Snow Water Content PDF Cal Coop Snow Survey 2017 Readings April 1 April 20 May 2 May, 2017 Averages May 15 June 15 BEST FORECASTS Precipitation General Quantitative Precipitation Forecasts: ALL RAIN FORECASTS & MODELS Seven Day Precip Animation Precipitation Geographic All High Sierra ZONE & POINT FORECASTS All High Sierra ZONE FORECASTS GRAPHICAL INTERFACE Forecast Winds? Weather? NorCal Graphics Region, SW US Forecast Temperatures Model Five Day Mean Low Temps Click Green "Latest" Model, observe using step button All Temps Let's look at the Big Picture Surface Map The Pacific Ocean US Weather Map All Maps	7 Clearing Calm, Warming, Weak Low passed East. 2019 MAY 7 *HIGH SIERRA* 12th --Spring-- Temp-Snow Check Last Report: May 1, 2019 Next Report: May 11, 2019 Let's check our reporting station snow & temp readings after the last 2 cooler & breezy days with a weak Low passing by. Click the stations below for their latest reports. Below: Watershed Snow Water Content Charts followed by individual reporting station's Snow Depth and 24 hour high-low temps, and the change in snow depths since our last readings. A NEW WATER YEAR: LAST YEAR Total Precipitation 58 % of Average A NEW WATER YEAR: Reservoirs The Thaw: It's Coming N Sierra Reporting Stations On a Map Scroll over stations for snow & temps. Click for full report. South Sierra Stations "+/- & =" below are changes since last reading. Tahoe Basin Watershed Southwest Tahoe Trail Map with Stations PCT-TYT-TRT Rubicon 65" -8 7618 feet Trail Map (46.10 H2O) +0.3 59 & 41 +/+ PCT-TYT-TRT Echo Peak 71" -14" 7652 feet Stations Map (63.40 H2O) +0.1 57 & 40 +/+ American-Yuba Watersheds PCT-TYT Carson Pass 63" -11 8388 feet Trail Map Stations Map (44.90" H2O) =0.0 55 & 33 +/+ Carson-Walker Watersheds PCT-TYT Ebbetts Pass 78" -10 8660 feet Trail Map (60.30 H2O) =0.0 56 & 37 +/+ EAST FLANK Leavitt Lake 158" −13 9602 feet, East Flank Trail Map (63.70 H20) +0.1 50 & 34 +/+ EAST FLANK Marine Base Cold Weather Training 6748 feet East Flank Trail Map Above FULL REPORT VIS-CHIL-WEA-MB- WIND 79 & 35 +/− Mokelumne-Stanislaus Watersheds PCT-TYT Sonora Pass Kennedy Meadows RESUPPLY Deadman Creek 25.19" −6.57 9250 feet,West Flank, Trail Map (27.19" H20) +0.11" 50 & 28 +/+ Tuolumne-Merced Watersheds Tenaya Lake 52.05 −16.55" 8163 feet, West Flank Trail Map (18.26") H20 +0.04" 56 & 30 +/+ JMT-PCT-TYT Tuolumne Meadows 30.26" −12.02" 8600 feet, West Flank Trail Map (6.47") H20 =0.00" 53 & 27 +/+ Tioga Pass/Dana 51.93" −9.14 9798 feet Trail Map 13.53 H20 =0.00 50 & 26 +/+ Mammoth Mountain Mono Lake-Owens Basin East of PCT-JMT Above Gem Lake Gem Pass 151.00" −0.0 ERROR? 10750 feet Trail Map (00.00 H2O) −32.52 ?? temps bad JMT-PCT Junction Devils Postpile 34.36" −13.44 8004 feet Trail Map Above (0.0) = 56 & 29 +/+ NE of JMT-PCT Mammoth Pass 110.40" Sno −10.75 9500 feet Trail Map 47.32" H2O +8.6 ?? 56 & 31 +/+ JMT-PCT E of Bear Ridge Volcanic Knob 67.20" −8" 10100 feet Trail Map (0.00) 53 & 26 +/+ East Flank South Lake Cabin (Snow removed ") 9580 feet, East Flank Trail Map (26.00 H2O) =0.00 55 & 29 +/+ East Flank Big Pine Sawmill 36.10" Snow −5.7 10200 feet, East Flank Trail Map Above 48 & 25 +/+ Kings River Just East JMT-PCT Bishop Pass --.-- 11972 feet Trail Map Above BAD- BAD Just West JMT-PCT Charlotte Lake 68.64" Snow −9.49 10398 feet, West Flank Trail Map 54.17 H2O +0.07 45 & 26 +/+ (Typically the coldest station) Kern Watershed JMT-PCT Upr Tyndall Creek 74.55" −6.73" 11441 feet Trail Map (x.xx" H2O +x.xx") 47 & 28 +/+ JMT Crabtree Meadow 28.66" Snow −4.96" 10,700 feet Trail Map (22.59 H2O) +0.16 44 & 26 +/+ All High Sierra Reporting Stations More Stations, by Watersheds May 7, 2018 Snow Report	8 Calm Day Calm, Weak Low off Coast LAST WEEK NEXT WEEK THE CURRENT SNOWPACK Current Conditions All Snow Information GRAPHICS Date-Adjustable Multi-Aspect High Sierra Snowpack Status THE 7th NOAA-NOHRSC SNOWPACK The High Sierra 5-7-19 OBSERVATIONS All High Sierra Reporting Stations Temp & Snow Tables by Watershed and Highway Corridor	9 Weak Low Approaching, Crossing Today Late Showers Expected Biased to S Sierra May 2019 Trail News SPRING THAW RIVER INFORMATION RESERVOIRS HAZARDS LAST WEEK NEXT WEEK TOP BEST FORECASTS Precipitation General Quantitative Precipitation Forecasts: ALL RAIN FORECASTS & MODELS Seven Day Precip Animation Precipitation Geographic All High Sierra ZONE & POINT FORECASTS All High Sierra ZONE FORECASTS GRAPHICAL INTERFACE Forecast Winds? Weather? NorCal Graphics Region, SW US Forecast Temperatures Model Five Day Mean Low Temps Click Green "Latest" Model, observe using step button All Temps Let's look at the Big Picture Surface Map The Pacific Ocean US Weather Map All Maps LAST WEEK NEXT WEEK TOP	10 Weak Low Weak Instability has returned, after an extended period of calm, warming weather. Glacier Point Road Opening, with Status of Higways 4, 108, & 120 Advisories Lake Wind Tahoe-Lake Wind Reno NWS Winter South Sierra SJ Valley NWS, Hanford All Sierra Forecast Zones KM OPEN Report from Kennedy Meadows Alex We’re open fully and fish have been stocked. First pct hiker was here yesterday. Lots of snow up high. Expect snow and high runoff until mid July at higher elevations. Highway should be open over pass by memorial weekend. We’re stocked and ready for hikers. Thanks, Matt BIG NEWS 2017: Summer "Opening" of Trails "Put-Off" until it happens. Late July? I mean clear trails across the High Passes. On the Crest Trails. Maybe not at all this Summer.	11 Weak Low Calm, Weak Low, Weak precip Showers Anticipated Biased to S Sierra 2019 MAY 11 *HIGH SIERRA* 13th --Spring-- Temp-Snow Check Last Report: May 7, 2019 Next Report: May 14, 2019 Let's check our reporting station snow & temp readings after the last 2 cooler & breezy days with a weak Low passing by. Click the stations below for their latest reports. Below: Watershed Snow Water Content Charts followed by individual reporting station's Snow Depth and 24 hour high-low temps, and the change in snow depths since our last readings. A NEW WATER YEAR: LAST YEAR Total Precipitation 58 % of Average A NEW WATER YEAR: Reservoirs The Thaw: It's Coming N Sierra Reporting Stations On a Map Scroll over stations for snow & temps. Click for full report. South Sierra Stations "+/- & =" below are changes since last reading. Tahoe Basin Watershed Southwest Tahoe Trail Map with Stations PCT-TYT-TRT Rubicon 59" -6 7618 feet Trail Map (46.10 H2O) =0.0 58 & 41 -/= PCT-TYT-TRT Echo Peak 62" -9" 7652 feet Stations Map (63.20 H2O) −0.2 58 & 40 +/= American-Yuba Watersheds PCT-TYT Carson Pass 56" -7 8388 feet Trail Map Stations Map (44.90" H2O) =0.0 56 & 34 +/+ Carson-Walker Watersheds PCT-TYT Ebbetts Pass 72" -6 8660 feet Trail Map (60.40 H2O) +0.1 56 & 35 =/− EAST FLANK Leavitt Lake 153" −5 9602 feet, East Flank Trail Map (63.70 H20) =0.0 50 & 35 =/+ EAST FLANK Marine Base Cold Weather Training 6748 feet East Flank Trail Map Above FULL REPORT VIS-CHIL-WEA-MB- WIND 70 & 39 −/+ Mokelumne-Stanislaus Watersheds PCT-TYT Sonora Pass Kennedy Meadows RESUPPLY Deadman Creek 20.26" −4.93 9250 feet,West Flank, Trail Map (27.46" H20) +0.27" 51 & 32 +/+ Tuolumne-Merced Watersheds Tenaya Lake 43.56 −8.49" 8163 feet, West Flank Trail Map (18.61") H20 +0.35" 59 & 29 +/− JMT-PCT-TYT Tuolumne Meadows 21.44" −8.82" 8600 feet, West Flank Trail Map (6.59") H20 +0.12" 55 & 25 +/− Tioga Pass/Dana 47.45" −4.48 9798 feet Trail Map 13.89 H20 +0.36 48 & 27 −/+ Mammoth Mountain Mono Lake-Owens Basin East of PCT-JMT Above Gem Lake Gem Pass 151.00" −0.0 ERROR? 10750 feet Trail Map (31.43 H2O) +31.43 ?? temps bad JMT-PCT Junction Devils Postpile 27.79" −6.57 8004 feet Trail Map Above (0.0) = 60 & 27 +/− NE of JMT-PCT Mammoth Pass 105.17" Sno −5.23 9500 feet Trail Map 52.44" H2O +5.12 ?? 57 & 29 +/− JMT-PCT E of Bear Ridge Volcanic Knob 62.50" −4.7" 10100 feet Trail Map (0.00) 51 & 23 −/− East Flank South Lake Cabin (Snow removed ") 9580 feet, East Flank Trail Map (26.50 H2O) +0.50 60 & 28 +/− East Flank Big Pine Sawmill 44.80" Snow +8.7 ?? 10200 feet, East Flank Trail Map Above 46 & 26 −/+ Kings River Just East JMT-PCT Bishop Pass --.-- 11972 feet Trail Map Above BAD- BAD Just West JMT-PCT Charlotte Lake 69.53" Snow +0.89 10398 feet, West Flank Trail Map 55.59 H2O +1.42 ??? 43 & 29 −/+ (Typically the coldest station) Kern Watershed JMT-PCT Upr Tyndall Creek 81.55" +7" 11441 feet Trail Map (x.xx" H2O +x.xx") 41 & 28 −/= JMT Crabtree Meadow 27.49" Snow −1.17" 10,700 feet Trail Map (23.20 H2O) +0.61 41 & 31 −/+ All High Sierra Reporting Stations More Stations, by Watersheds
Sunday	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday
12 Nice Day Instability Cleared Early Where are We At? January to March 2019 National Temperature & Precipitation Rankings, 1895 to 2019. NOAA Climate Monitoring. LAST WEEK NEXT WEEK TOP Past Snow & Temps This Week in 2018 Snow & Temps This Week in 2017 Snow & Temps *Past News* Review the May 2019 Trail News Forum Review the May 2017 Trail News Forum	13 Nice Day 2019 Current Snowpack: Percent of Average for May 13. N Sierra: 130% −12% in 7 days Cen. Sierra: 133% −10% in 7 days S Sierra: 120% −9% in 7 days Ca State: 127% −11% in 7 days Last Reading May 6 Statewide Summary of Snow Water Content PDF Cal Coop Snow Survey 2017 Readings April 1 April 20 May 2 May, 2017 Averages May 15 June 15	14 Cloudy Day Gulf Alaska Low dragging Front along Ca Coast. Weather West Analysis WINTER STORM WARNINGS NORTH SIERRA WARNING 247 PM PDT Tue May 14 2019 "A strong, late season storm will bring significant snowfall accumulations to the higher elevations of the northern Sierra Nevada and Mt. Lassen area later this week. Expect travel delays and possible chain controls if going through the higher passes of the northern Sierra Nevada. Once this storm exits the region late Friday morning, another system is forecast to impact the mountains over the weekend." NWS SACTO Carson Pass Seven Day Forecast *SOUTH SIERRA* WARNING NWS Hanford WARNING Seven Day Forecast Mono Hot Springs What Up? Informative "Normal" Vs. Now Forcasts & Reality vs. Averages Weather Trends 2019 MAY 14 *HIGH SIERRA* 14th --Spring-- Temp-Snow Check Last Report: May 11, 2019 Next Report: May 17, 2019 Let's check our reporting station snow & temp readings after the last 3 days of mild instability, with the Front trailing the Low in Gulf Alaska due to cross the Sierra tomorrow. Click the stations below for their latest reports. Below: Watershed Snow Water Content Charts followed by individual reporting station's Snow Depth and 24 hour high-low temps, and the change in snow depths since our last readings. A NEW WATER YEAR: LAST YEAR Total Precipitation 58 % of Average A NEW WATER YEAR: Reservoirs The Thaw: It's Coming N Sierra Reporting Stations On a Map Scroll over stations for snow & temps. Click for full report. South Sierra Stations "+/- & =" below are changes since last reading. Tahoe Basin Watershed Southwest Tahoe Trail Map with Stations PCT-TYT-TRT Rubicon 54" -5 7618 feet Trail Map (46.10 H2O) =0.0 57 & 42 −/+ PCT-TYT-TRT Echo Peak 53" -9" 7652 feet Stations Map (63.30 H2O) +0.1 55 & 44 −/+ American-Yuba Watersheds PCT-TYT Carson Pass 49" -7 8388 feet Trail Map Stations Map (44.90" H2O) =0.0 54 & 38 −/+ Carson-Walker Watersheds PCT-TYT Ebbetts Pass 64" −8 8660 feet Trail Map (60.40 H2O) =0.0 52 & 39 −/+ EAST FLANK Leavitt Lake 147" −6 9602 feet, East Flank Trail Map (63.70 H20) =0.0 48 & 39 −/+ EAST FLANK Marine Base Cold Weather Training 6748 feet East Flank Trail Map Above FULL REPORT VIS-CHIL-WEA-MB- WIND 86 & 40 +/+ Mokelumne-Stanislaus Watersheds PCT-TYT Sonora Pass Kennedy Meadows RESUPPLY Deadman Creek 14.58" −5.68 9250 feet,West Flank, Trail Map (27.46" H20) −0.05" 50 & 32 −/= Tuolumne-Merced Watersheds Tenaya Lake 35.40 −8.16" 8163 feet, West Flank Trail Map (18.61") H20 =0.00" 57 & 27 −/− JMT-PCT-TYT Tuolumne Meadows 12.95" −8.49" 8600 feet, West Flank Trail Map (6.59") H20 =0.00" 54 & 26 −/+ Tioga Pass/Dana 41.98" −5.47 9798 feet Trail Map 13.89 H20 =0.00 51 & 26 +/− Mammoth Mountain Mono Lake-Owens Basin East of PCT-JMT Above Gem Lake Gem Pass 151.00" −0.0 ERROR? 10750 feet Trail Map (00.00 H2O) -31.43 ?? temps bad JMT-PCT Junction Devils Postpile 18.71" −9.08 8004 feet Trail Map Above (0.0) = 58 & 28 −/+ NE of JMT-PCT Mammoth Pass 99.08" Sno −6.09 9500 feet Trail Map 52.44" H2O =0.00 ?? 52 & 31 −/+ JMT-PCT E of Bear Ridge Volcanic Knob 58.70" −3.8" 10100 feet Trail Map (0.00) 54 & 27 +/+ East Flank South Lake Cabin (Snow removed ") 9580 feet, East Flank Trail Map (26.50 H2O) =0.00 60 & 32 =/+ East Flank Big Pine Sawmill 36.70" Snow −8.1 10200 feet, East Flank Trail Map Above 52 & 30 +/+ Kings River Just East JMT-PCT Bishop Pass --.-- 11972 feet Trail Map Above BAD- BAD Just West JMT-PCT Charlotte Lake 61.01" Snow −8.52 10398 feet, West Flank Trail Map 55.79 H2O −0.20 ??? 49 & 27 +/− (Typically the coldest station) Kern Watershed JMT-PCT Upr Tyndall Creek 76.26" −5.29" 11441 feet Trail Map (x.xx" H2O +x.xx") 50 & 31 +/+ JMT Crabtree Meadow 24.17" Snow −3.32" 10,700 feet Trail Map (23.43 H2O) +0.23 51 & 28 +/− All High Sierra Reporting Stations More Stations, by Watersheds	15 Stormy Day Light to Moderate Precip RADAR Status Sierra Highways SPRING THAW RIVER INFORMATION RESERVOIRS HAZARDS HIGH SIERRA Mosquito News 2017 Current Snowpack VAST Percent of Average for May 1. Ca State: 181% % of April 1: 140% Compare against previous years. THE CURRENT SNOWPACK Current Conditions All Snow Information GRAPHICS Date-Adjustable Multi-Aspect High Sierra Snowpack Status THE 14th NOAA-NOHRSC SNOWPACK The High Sierra 5-14-19 OBSERVATIONS All High Sierra Reporting Stations Temp & Snow Tables by Watershed and Highway Corridor	16 Stormy Day Light to Moderate Precip High Temps on Crest Non-Snow Precipitation Maybe 2 inches snow since Yesterday 2019 Current Snowpack: Percent of Average for May 16. N Sierra: 127% −3% in 3 days Cen. Sierra: 129% −4% in 3 days S Sierra: 117% −3% in 3 days Ca State: 123% −4% in 3 days Last Reading May 13 Statewide Summary of Snow Water Content PDF Cal Coop Snow Survey Modis Satellite Views (Compare 2017, 18, & 19) LAST WEEK NEXT WEEK TOP	17 Clearing Day Snow Accumulated Last Night COLD Hazard WINTER STORM WATCHES Sacto-----Hanford 2019 Current Snowpack: Percent of Average for May 17. N Sierra: 133% +6% in 1 day Cen. Sierra: 135% +6% in 1 day S Sierra: 121% +4% in 1 day Ca State: 129% +6% in 1 day Last Reading May 16 Next Reading May 20 2019 MAY 17 *HIGH SIERRA* 15th --Spring-- Temp-Snow Check Last Report: May 14, 2019 Next Report: May 19, 2019 Let's check our reporting station snow & temp readings after the last 2 days of light to moderate precip, clearing today, with a series of lows and fronts anticipated tomorrow, and through next week. Click the stations below for their latest reports. Below: Watershed Snow Water Content Charts followed by individual reporting station's Snow Depth and 24 hour high-low temps, noting the change in snow depths and temps since our last readings. A NEW WATER YEAR: LAST YEAR Total Precipitation 58 % of Average A NEW WATER YEAR: Reservoirs The Thaw: It's Coming N Sierra Reporting Stations On a Map Scroll over stations for snow & temps. Click for full report. South Sierra Stations "+/- & =" below are changes since last reading. Tahoe Basin Watershed Southwest Tahoe Trail Map with Stations PCT-TYT-TRT Rubicon 54" =0 7618 feet Trail Map (47.10 H2O) +1.0 42 & 29 −/− PCT-TYT-TRT Echo Peak 55" +2" 7652 feet Stations Map (63.60 H2O) +0.3 37 & 27 −/− American-Yuba Watersheds PCT-TYT Carson Pass 50"+1 8388 feet Trail Map Stations Map (46.00" H2O) +1.1 41 & 26 −/− Carson-Walker Watersheds PCT-TYT Ebbetts Pass 68" +4 8660 feet Trail Map (62.10 H2O) +1.7 41 & 24 −/− EAST FLANK Leavitt Lake 160" +13 9602 feet, East Flank Trail Map (65.30 H20) +1.6 37 & 22 −/− EAST FLANK Marine Base Cold Weather Training 6748 feet East Flank Trail Map Above FULL REPORT VIS-CHIL-WEA-MB- WIND 62 & 38 −/− Mokelumne-Stanislaus Watersheds PCT-TYT Sonora Pass Kennedy Meadows RESUPPLY Deadman Creek 15.03" +0.45 9250 feet,West Flank, Trail Map (28.17" H20) +0.71" 33 & 21 −/− Tuolumne-Merced Watersheds Tenaya Lake 39.57 +4.17" 8163 feet, West Flank Trail Map (20.10") H20 +1.49 " 43 & 25 −/− JMT-PCT-TYT Tuolumne Meadows 13.06" +0.11" 8600 feet, West Flank Trail Map (7.52") H20 +0.93" 42 & 22 −/− Tioga Pass/Dana 45.73" +3.75 9798 feet Trail Map 13.95 H20 =0.06 ?? 35 & 18 −/− Mammoth Mountain Mono Lake-Owens Basin East of PCT-JMT Above Gem Lake Gem Pass 151.00" −0.0 ERROR? 10750 feet Trail Map (00.00 H2O) -31.43 ?? temps bad JMT-PCT Junction Devils Postpile 19.11" +0.4 8004 feet Trail Map Above (0.0) = 42 & 27 −/− NE of JMT-PCT Mammoth Pass 106.30" Sno +7.22 9500 feet Trail Map 55.16" H2O +2.72 ?? 41 & 21 −/− JMT-PCT E of Bear Ridge Volcanic Knob 66.20" +7.5" 10100 feet Trail Map (0.00) 42 & 20 −/− East Flank South Lake Cabin (Snow removed ") 9580 feet, East Flank Trail Map (26.70 H2O) +0.20 49 & 23 −/− East Flank Big Pine Sawmill 37.10" Snow +0.4 10200 feet, East Flank Trail Map Above 38 & 20 −/− Kings River Just East JMT-PCT Bishop Pass --.-- 11972 feet Trail Map Above BAD- BAD Just West JMT-PCT Charlotte Lake 64.01" Snow +3 10398 feet, West Flank Trail Map 56.99 H2O +1.20 32 & 18 −/− (Typically the coldest station) Kern Watershed JMT-PCT Upr Tyndall Creek 79.04" +2.78" 11441 feet Trail Map (x.xx" H2O +x.xx") 30 & 15 −/− JMT Crabtree Meadow 24.91" Snow +0.74" 10,700 feet Trail Map (23.43 H2O) +0.38 37 & 13 −/− All High Sierra Reporting Stations More Stations, by Watersheds	18 Stormy Day Light to Moderate Precip Late Evening Precip FINALLY Snowfall that's, "sticking," & Accumulating The Weather Page NWS High Sierra Hazard WARNINGS & National Hazard Map LAST WEEK NEXT WEEK TOP Seven Day Freezing Temperature Probability Watch It! California Web Cams BEST FORECASTS Precipitation General Quantitative Precipitation Forecasts: ALL RAIN FORECASTS & MODELS Direct to Seven Day Precip Animation Precipitation Geographic All High Sierra ZONE & POINT FORECASTS All High Sierra ZONE FORECASTS Now RADAR GRAPHICAL INTERFACE Forecast Winds? Weather? NorCal Graphics Region, SW US Forecast Temperatures Model Five Day Mean Low Temps Click Green "Latest" Model, observe using step button All Temps Let's look at the Big Picture Surface Map The Pacific Ocean US Weather Map All Maps LAST WEEK NEXT WEEK TOP LAST WEEK NEXT WEEK TOP
Sunday	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday
19 Showers Weak Low crossing N. Ca. Coast, its Forming Front ("Frontogenesis") Along & Crossing Sierra, Light to Moderate Precip MAP COLD Hazard WINTER STORM WARNINGS Sacto-----Hanford North Sierra Sacto Warning "...Late Season Mountain Snow Today..." South Sierra Hanford Warning "...Winter weather continues over the higher elevations of the Sierra today..." **High & Low** FORECASTS High Elevation 8600 Ft Carson Pass Forecast 7 Days of Snow Low Elevation 4000 Ft Yosemite Valley Forecast 7 Days of Rain 2019 MAY 19 *HIGH SIERRA* 16th --Spring-- Temp-Snow Check Last Report: May 17, 2019 Next Report: May 23, 2019 Let's check our reporting station snow & temp readings after the last day of light to moderate precip, breaking up later today, with a series of lows and fronts anticipated through next week. Click the stations below for their latest reports. Below: Watershed Snow Water Content Charts followed by individual reporting station's Snow Depth and 24 hour high-low temps, noting the change in snow depths and temps since our last readings. A NEW WATER YEAR: LAST YEAR Total Precipitation 58 % of Average A NEW WATER YEAR: Reservoirs The Thaw: It's Coming N Sierra Reporting Stations On a Map Scroll over stations for snow & temps. Click for full report. South Sierra Stations "+/- & =" below are changes since last reading. Tahoe Basin Watershed Southwest Tahoe Trail Map with Stations PCT-TYT-TRT Rubicon 53" -1 7618 feet Trail Map (47.50 H2O) +0.4 35 & 30 −/+ PCT-TYT-TRT Echo Peak 59" +4" 7652 feet Stations Map (63.00 H2O) -0.6 34 & 29 −/+ American-Yuba Watersheds PCT-TYT Carson Pass 54"+4 8388 feet Trail Map Stations Map (46.70" H2O) +0.7 35 & 27 −/+ Carson-Walker Watersheds PCT-TYT Ebbetts Pass 74" +6 8660 feet Trail Map (62.80 H2O) +0.7 31 & 22 −/− West of PCT Highlands Meadow 14.2" 8360 feet Trail Map (47.52) 30 & 23 EAST FLANK Leavitt Lake 173" +13 9602 feet, East Flank Trail Map (66.30 H20) +1.0 29 & 23 −/+ EAST FLANK Marine Base Cold Weather Training 6748 feet East Flank Trail Map Above FULL REPORT VIS-CHIL-WEA-MB- WIND 76 & 29 +/− Mokelumne-Stanislaus Watersheds PCT-TYT Sonora Pass Kennedy Meadows RESUPPLY Deadman Creek 19.04" +4.01 9250 feet,West Flank, Trail Map (28.50" H20) +0.33" 31 & 21 −/= Tuolumne-Merced Watersheds SW of TYT Horse Meadow 106" 8602 feet Trail Map (No H2O) 33 & 24 Tenaya Lake 45.60 +6.03" 8163 feet, West Flank Trail Map (20.40") H20 +0.30" 31 & 19 −/− JMT-PCT-TYT Tuolumne Meadows 12.49" −0.57" 8600 feet, West Flank Trail Map (7.83") H20 +0.31" 32 & 18 −/− Tioga Pass/Dana 50.41" +4.68 9798 feet Trail Map 14.00 H20 +0.05 27 & 13 −/− Mammoth Mountain Mono Lake-Owens Basin East of PCT-JMT Above Gem Lake Gem Pass 151.00" −0.0 ERROR? 10750 feet Trail Map (00.00 H2O) =0.00 ?? temps bad JMT-PCT Junction Devils Postpile 26.39" +7.28 8004 feet Trail Map Above (0.0) = 32 & 26 −/− NE of JMT-PCT Mammoth Pass 119.01" Sno +12.71 9500 feet Trail Map 56.48" H2O +1.32 30 & 20 −/− JMT-PCT E of Bear Ridge Volcanic Knob 78.90" +12.7" 10100 feet Trail Map (0.00) 33 & 18 −/− East Flank South Lake Cabin (Snow removed ") 9580 feet, East Flank Trail Map (26.10 H2O) +0.10 31 & 17 −/− East Flank Big Pine Sawmill 42.80" Snow +5.7 10200 feet, East Flank Trail Map Above 27 & 16 −/− Kings River Just East JMT-PCT Bishop Pass --.-- 11972 feet Trail Map Above BAD- BAD Just West JMT-PCT Charlotte Lake 74.45" Snow +10.44 10398 feet, West Flank Trail Map 56.99 H2O +0.92 25 & 13 −/− (Typically the coldest station) Kern Watershed JMT-PCT Upr Tyndall Creek 84.57" +5.53" 11441 feet Trail Map (x.xx" H2O +x.xx") 25 & 11 −/− JMT Crabtree Meadow 29.30" Snow +4.39" 10,700 feet Trail Map (23.43 H2O) +0.44 27 & 9 −/− All High Sierra Reporting Stations More Stations, by Watersheds	20 Clear Spots Sucker Hole between Lows & Their Fronts 2019 Current Snowpack: Percent of Average for May 20. N Sierra: 149% +16% in 3 days Cen. Sierra: 155% +20% in 3 days S Sierra: 136% +15% in 3 days Ca State: 147% +18% in 3 days Last Reading May 17 Statewide Summary of Snow Water Content PDF Cal Coop Snow Survey This Week in 2018 Snow & Temps This Week in 2017 Snow & Temps	21 Stormy Day Light to Moderate Scattered Precip RADAR Status Sierra Highways LAST WEEK NEXT WEEK TOP SPRING THAW RIVER INFORMATION RESERVOIRS HAZARDS LAST WEEK NEXT WEEK TOP	22 Clearing Big High building in on West Coast Low Over S Nevada Light Snow & Precip Across Crest thru MONDAY ALL FORECAST ZONES 2019 Current Snowpack: Percent of Average for May 22. N Sierra: 165% +16% in 2 days Cen. Sierra: 169% +14% in 2 days S Sierra: 146% +10% in 2 days Ca State: 159% +12% in 2 days Last Reading May 20 Statewide Summary of Snow Water Content PDF THE CURRENT SNOWPACK Current Conditions All Snow Information GRAPHICS Date-Adjustable Multi-Aspect High Sierra Snowpack Status THE 20th NOAA-NOHRSC SNOWPACK The High Sierra 5-20-19 OBSERVATIONS All High Sierra Reporting Stations Temp & Snow Tables by Watershed and Highway Corridor	23 Clearing Ca Big High building in on West Coast Low Over NE Nevada Light Snow & Precip Across Crest thru MEMORIAL DAY 2019 Current Snowpack: Percent of Average for May 23. N Sierra: 172% +7% in 1 day Cen. Sierra: 174% +5% in 1 day S Sierra: 150% +4% in 1 day Ca State: 164% +5% in 1 day Last Reading May 22 Next Reading May 28 Statewide Summary of Snow Water Content PDF 2019 MAY 23 *HIGH SIERRA* 17th --Spring-- Temp-Snow Check Last Report: May 19, 2019 Next Report: May 27, 2019 Let's check our reporting station snow & temp readings after the last 3 days of light to moderate precip pushed Southwest across the Sierra from Lows, first on the point of S Nevada, and today, from a Low in the NE corner of Nevada Click the stations below for their latest reports. Below: Watershed Snow Water Content Charts followed by individual reporting station's Snow Depth and 24 hour high-low temps, noting the change in snow depths and temps since our last readings. A NEW WATER YEAR: LAST YEAR Total Precipitation 58 % of Average A NEW WATER YEAR: Reservoirs The Thaw: It's Coming N Sierra Reporting Stations On a Map Scroll over stations for snow & temps. Click for full report. South Sierra Stations "+/- & =" below are changes since last reading. Tahoe Basin Watershed Southwest Tahoe Trail Map with Stations PCT-TYT-TRT Rubicon 56" +3 7618 feet Trail Map (48.30 H2O) +0.8 43 & 35 +/+ PCT-TYT-TRT Echo Peak 57" −2" 7652 feet Stations Map (67.40 H2O) +4.4 ?? 44 & 34 +/+ American-Yuba Watersheds PCT-TYT Carson Pass 53" −1 8388 feet Trail Map Stations Map (47.70" H2O) +1.0 41 & 33 +/+ Carson-Walker Watersheds PCT-TYT Ebbetts Pass 75" +1 8660 feet Trail Map (64.40 H2O) +1.6 ?? 40 & 32 +/+ West of PCT Highlands Meadow 19.36" +5.16 8360 feet Trail Map (48.52) +1.0 40 & 31 +/+ EAST FLANK Leavitt Lake 168" −5 9602 feet, East Flank Trail Map (67.30 H20) +1.0 41 & 29 +/+ EAST FLANK Marine Base Cold Weather Training 6748 feet East Flank Trail Map Above FULL REPORT VIS-CHIL-WEA-MB- WIND 64 & 35 −/+ Mokelumne-Stanislaus Watersheds PCT-TYT Sonora Pass Kennedy Meadows RESUPPLY Deadman Creek 18.70" −0.34 9250 feet,West Flank, Trail Map (29.70" H20) +1.20" 40 & 30 +/+ Tuolumne-Merced Watersheds SW of TYT Horse Meadow 105.4" −.6 8602 feet Trail Map (No H2O) 41 & 28 +/+ Tenaya Lake 42.64 −2.96" 8163 feet, West Flank Trail Map (21.57") H20 +1.17" 42 & 32 +/+ JMT-PCT-TYT Tuolumne Meadows 9.57" −2.92" 8600 feet, West Flank Trail Map (8.14") H20 +0.31" 42 & 30 +/+ Tioga Pass/Dana 48.83" −1.58 9798 feet Trail Map 14.37 H20 +0.37 37 & 26 +/+ Mammoth Mountain Mono Lake-Owens Basin East of PCT-JMT Above Gem Lake Gem Pass 151.00" −0.0 ERROR? 10750 feet Trail Map (00.00 H2O) =0.00 ?? temps bad JMT-PCT Junction Devils Postpile 17.93" −8.46 8004 feet Trail Map Above (0.0) = 39 & 32 +/+ NE of JMT-PCT Mammoth Pass 118.70" Sno −0.31 9500 feet Trail Map 57.76" H2O +1.28 37 & 28 +/+ JMT-PCT E of Bear Ridge Volcanic Knob 80.60" +1.7" 10100 feet Trail Map (0.00) 38 & 25 +/+ East Flank South Lake Cabin (Snow removed ") 9580 feet, East Flank Trail Map (27.10 H2O) +1.00 45 & 26 +/+ East Flank Big Pine Sawmill 43.70" Snow +0.9 10200 feet, East Flank Trail Map Above 36 & 24 +/+ Kings River Just East JMT-PCT Bishop Pass --.-- 11972 feet Trail Map Above BAD- BAD Just West JMT-PCT Charlotte Lake 58.82" Snow −15.6" 10398 feet, West Flank Trail Map 58.82 H2O +0.92 34 & 21 +/+ (Typically the coldest station) Kern Watershed JMT-PCT Upr Tyndall Creek 82.84" −1.73" 11441 feet Trail Map (x.xx" H2O +x.xx") 37 & 19 +/+ JMT Crabtree Meadow 25.40" Snow −3.9" 10,700 feet Trail Map (24.45 H2O) +1.02 37 & 17+/+ All High Sierra Reporting Stations More Stations, by Watersheds	24 Clear Sierra Early Precip approaching N Sierra, persistant Weak S Nevada Low Weak Snow & Precip Across Crest thru MEMORIAL DAY May 24 Report TYT Problems Donnell Fire Aftermath Stanislaus National Forest, Carson Iceberg Wilderness Closures Resupply Lake Alpine Opening BEST FORECASTS Precipitation General Quantitative Precipitation Forecasts: ALL RAIN FORECASTS & MODELS Direct to Seven Day Precip Animation Precipitation Geographic All High Sierra ZONE & POINT FORECASTS All High Sierra ZONE FORECASTS Now RADAR Direct to GRAPHICAL INTERFACE Forecast Winds? Weather? NorCal Graphics Region, SW US Forecast Temperatures Model Five Day Mean Low Temps Click Green "Latest" Model, observe using step button All Temps Let's look at the Big Picture Surface Map The Pacific Ocean US Weather Map All Maps	25 Light Showers WINTER WEATHER ADVISORIES Sacto-----Reno Hanford "Winter-like conditions despite the late spring calendar date. 5 AM SUN TO 5 AM MON" HAIL-LIGHTENING FORECAST ALL FORECAST ZONES LAST WEEK NEXT WEEK TOP Review the May 2019 Trail News Forum Review the May 2017 Trail News Forum LAST WEEK NEXT WEEK TOP LAST WEEK NEXT WEEK TOP
Sunday	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday
26 Unstable Light to Moderate Scattered Precip, Cool, out of N & NE LAST WEEK NEXT MONTH TOP This Week in 2017 Snow & Temp National Hazard Map 2016-17 High Sierra Season Review	27 MEMORIAL DAY Unstable Light to Moderate Scattered Precip, Cool, out of N & NE Persistant Low Over S Nevada ALL FORECAST ZONES COLD Hazard LOWER LOWS 2019 MAY 27 *HIGH SIERRA* 18th --Spring-- Temp-Snow Check Last Report: May 23, 2019 Next Report: May 30, 2019 Let's check our reporting station snow & temp readings after the last 4 days of light to moderate unstable weather-snow-mixed-precip. Click the stations below for their latest reports. Below: Watershed Snow Water Content Charts followed by individual reporting station's Snow Depth and 24 hour high-low temps, noting the change in snow depths and temps since our last readings. A NEW WATER YEAR: LAST YEAR Total Precipitation 58 % of Average A NEW WATER YEAR: Reservoirs The Thaw: It's Coming N Sierra Reporting Stations On a Map Scroll over stations for snow & temps. Click for full report. South Sierra Stations "+/- & =" below are changes since last reading. Tahoe Basin Watershed Southwest Tahoe Trail Map with Stations PCT-TYT-TRT Rubicon 56" −5 7618 feet Trail Map (48.80 H2O) +0.5 44 & 30 +/− PCT-TYT-TRT Echo Peak 55" −2" 7652 feet Stations Map (67.90 H2O) +0.5 47 & 27 +/− American-Yuba Watersheds PCT-TYT Carson Pass 52" −1 8388 feet Trail Map Stations Map (48.40" H2O) +0.7 45 & 26 +/− Carson-Walker Watersheds PCT-TYT Ebbetts Pass 71" −4 8660 feet Trail Map (65.00 H2O) +0.6 44 & 25 +/− West of PCT Highlands Meadow 13.45" −5.91 8360 feet Trail Map (48.82) +0.3 41 & 18 +/− EAST FLANK Leavitt Lake 164" −4 9602 feet, East Flank Trail Map (67.70 H20) +0.4 42 & 23 +/− EAST FLANK Marine Base Cold Weather Training 6748 feet East Flank Trail Map Above FULL REPORT VIS-CHIL-WEA-MB- WIND 61 & 36 −/+ Mokelumne-Stanislaus Watersheds PCT-TYT Sonora Pass Kennedy Meadows RESUPPLY Deadman Creek 15.49" −3.21 9250 feet,West Flank, Trail Map (30.08" H20) +0.38" 43 & 16 +/− Tuolumne-Merced Watersheds SW of TYT Horse Meadow 109.10" +3.7 8602 feet Trail Map (No H2O) 49 & 15 +/+ Tenaya Lake 37.35 −5.29" 8163 feet, West Flank Trail Map (22.37") H20 +0.80" 44 & 19 +/− JMT-PCT-TYT Tuolumne Meadows 8.23" −1.34" 8600 feet, West Flank Trail Map (8.49") H20 +0.35" 45 & 17 +/− Tioga Pass/Dana 45.64" −3.19 9798 feet Trail Map 14.37 H20 +1.03 ?? 42 & 12 +/− Mammoth Mountain Mono Lake-Owens Basin East of PCT-JMT Above Gem Lake Gem Pass 151.00" −0.0 ERROR? 10750 feet Trail Map (00.00 H2O) =0.00 ?? temps bad JMT-PCT Junction Devils Postpile 16.01" −1.92 8004 feet Trail Map Above (0.0) = 44 & 23 +/− NE of JMT-PCT Mammoth Pass 112.64" Sno −6.06 9500 feet Trail Map 58.80" H2O +1.04 ? 46 & 16 +/− JMT-PCT E of Bear Ridge Volcanic Knob 72.40" −8.2" 10100 feet Trail Map (0.00) 46 & 12 +/− East Flank South Lake Cabin (Snow removed ") 9580 feet, East Flank Trail Map (27.10 H2O) =0.00 52 & 20 +/− East Flank Big Pine Sawmill 37.60" Snow −6.1 10200 feet, East Flank Trail Map Above 40 & 16 +/− Kings River Just East JMT-PCT Bishop Pass --.-- 11972 feet Trail Map Above BAD- BAD Just West JMT-PCT Charlotte Lake 65.11" Snow +6.29 10398 feet, West Flank Trail Map 59.26 H2O +0.44 38 & 12 +/− (Typically the coldest station) Kern Watershed JMT-PCT Upr Tyndall Creek 80.82" −2.02" 11441 feet Trail Map (x.xx" H2O +x.xx") 39 & 16 +/− JMT Crabtree Meadow 22.43" Snow −2.97" 10,700 feet Trail Map (24.50 H2O) +0.05 40 & 16+/− All High Sierra Reporting Stations More Stations, by Watersheds	28 Unstable-Clearing Lighter to Moderate Scattered Precip & Clear out of N & NE Persistant Low Over S Nevada May 28 Report 2019 Current Snowpack: Percent of Average for May 28. N Sierra: 203% +31% in 5 days Cen. Sierra: 203% +29% in 5 days S Sierra: 173% +23% in 5 days Ca State: 191% +37% in 5 days Last Reading May 23 Statewide Summary of Snow Water Content PDF THE CURRENT SNOWPACK Current Conditions All Snow Information GRAPHICS Date-Adjustable Multi-Aspect High Sierra Snowpack Status THE 27th NOAA-NOHRSC SNOWPACK The High Sierra 5-27-19 OBSERVATIONS All High Sierra Reporting Stations Temp & Snow Tables by Watershed and Highway Corridor LAST WEEK NEXT MONTH TOP	29 Unstable-Clearing WARMING Lighter to Moderate Scattered Precip & Clear out of N & NE Persistant Low Over S Nevada High Sierra Weather Page SPRING THAW RIVER INFORMATION RESERVOIRS HAZARDS What Up? Informative "Normal" Vs. Now Forcasts & Reality vs. Averages	30 Unstable-Clearing WARMING Lighter to Moderate Scattered Precip & Clear out of N & NE Persistant Low Over S Nevada Rapid Thaw Underway 2019 Current Snowpack: Percent of Average for May 30. N Sierra: 212% +9% in 2 days Cen. Sierra: 211% +8% in 2 days S Sierra: 178% +5% in 2 days Ca State: 196% +5% in 2 days Last Reading May 28 Next Reading June 3 Statewide Summary of Snow Water Content PDF 2019 MAY 30 *HIGH SIERRA* 19th --Spring-- Temp-Snow Check Last Report: May 27, 2019 Next Report: June 2, 2019 Let's check our reporting station snow & temp readings after the last 2 days of light, unstable weather-snow-mixed-precip. Click the stations below for their latest reports. Below: Watershed Snow Water Content Charts followed by individual reporting station's Snow Depth and 24 hour high-low temps, noting the change in snow depths and temps since our last readings. A NEW WATER YEAR: LAST YEAR Total Precipitation 58 % of Average A NEW WATER YEAR: Reservoirs The Thaw: It's Coming N Sierra Reporting Stations On a Map Scroll over stations for snow & temps. Click for full report. South Sierra Stations "+/- & =" below are changes since last reading. Tahoe Basin Watershed Southwest Tahoe Trail Map with Stations PCT-TYT-TRT Rubicon 44" −12 7618 feet Trail Map (48.90 H2O) +0.1 54 & 39 +/+ PCT-TYT-TRT Echo Peak 47" −8" 7652 feet Stations Map (68.30 H2O) +0.4 55 & 40 +/+ American-Yuba Watersheds PCT-TYT Carson Pass 46" −6 8388 feet Trail Map Stations Map (48.70" H2O) +0.3 55 & 33 +/+ Carson-Walker Watersheds PCT-TYT Ebbetts Pass 66" −5 8660 feet Trail Map (65.20 H2O) +0.2 52 & 37 +/+ West of PCT Highlands Meadow 6.46" −6.99 8360 feet Trail Map (49.34) +0.52 48 & 31 +/+ EAST FLANK Leavitt Lake 157" −7 9602 feet, East Flank Trail Map (67.70 H20) +0.4 52 & 37 +/+ EAST FLANK Marine Base Cold Weather Training 6748 feet East Flank Trail Map Above FULL REPORT VIS-CHIL-WEA-MB- WIND 82 & 37+/+ Mokelumne-Stanislaus Watersheds PCT-TYT Sonora Pass Kennedy Meadows RESUPPLY Deadman Creek 10.75" −4.74 9250 feet,West Flank, Trail Map (30.25" H20) +0.17" 52 & 28 +/+ Tuolumne-Merced Watersheds SW of TYT Horse Meadow 114.40" +5.3 8602 feet Trail Map (No H2O) 52 & 25 +/+ Tenaya Lake 29.52 −7.83" 8163 feet, West Flank Trail Map (22.37") H20 =0.00" 55 & 28 +/+ JMT-PCT-TYT Tuolumne Meadows 0.11" −8.12" 8600 feet, West Flank Trail Map (8.49") H20 =0.00" 56 & 26 +/+ Tioga Pass/Dana 40.23" −5.41 9798 feet Trail Map 15.41 H20 +1.04 ?? 49 & 25 +/+ Mammoth Mountain Mono Lake-Owens Basin East of PCT-JMT Above Gem Lake Gem Pass 151.00" −0.0 ERROR? 10750 feet Trail Map (00.00 H2O) =0.00 ?? temps bad JMT-PCT Junction Devils Postpile 7.07" −8.94 8004 feet Trail Map Above (0.0) = 56 & 29 +/+ NE of JMT-PCT Mammoth Pass 105.98" Sno −6.66 9500 feet Trail Map 58.84" H2O +0.04 53 & 31 +/+ JMT-PCT E of Bear Ridge Volcanic Knob 67.20" −5.2" 10100 feet Trail Map (0.00) 54 & 24 +/+ East Flank South Lake Cabin (Snow removed ") 9580 feet, East Flank Trail Map (27.10 H2O) =0.00 56 & 29 +/+ East Flank Big Pine Sawmill 35.10" Snow −2.5 10200 feet, East Flank Trail Map Above 47 & 27 +/+ Kings River Just East JMT-PCT Bishop Pass --.-- 11972 feet Trail Map Above BAD- BAD Just West JMT-PCT Charlotte Lake 61.35" Snow −3.76 10398 feet, West Flank Trail Map 59.63 H2O +0.37 48 & 24 +/+ (Typically the coldest station) Kern Watershed JMT-PCT Upr Tyndall Creek 78.57" −2.25" 11441 feet Trail Map (x.xx" H2O +x.xx") 49 & 27 +/+ JMT Crabtree Meadow 19.71" Snow −2.72" 10,700 feet Trail Map (24.73 H2O) +0.23 48 & 26 +/+ All High Sierra Reporting Stations More Stations, by Watersheds	31 Unstable-Clearing WARMING Light to Moderate Scattered Precip & Clear out of NE & E Persistant Low Over S Nevada Thunderstorms Rapid Thaw Underway Mosquito News Mosquito Defense BEST FORECASTS Precipitation General Quantitative Precipitation Forecasts: ALL RAIN FORECASTS & MODELS Direct to Seven Day Precip Animation Precipitation Geographic All High Sierra ZONE & POINT FORECASTS All High Sierra ZONE FORECASTS Now RADAR Direct to GRAPHICAL INTERFACE Forecast Winds? Weather? NorCal Graphics Region, SW US Forecast Temperatures Model Five Day Mean Low Temps Click Green "Latest" Model, observe using step button All Temps Let's look at the Big Picture Surface Map The Pacific Ocean US Weather Map All Maps	1 JUNE Unstable-Clearing WARMING-SHOWERS Light Scattered Precip & Clear out of NE & E Persistant Low Over S Nevada Thunderstorms Rapid Thaw Underway LAST WEEK NEXT MONTH TOP LAST WEEK NEXT MONTH TOP LAST WEEK NEXT MONTH TOP

2019

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July August September October November December

2014 Calendar 2015 Calendar

2016 Calendar 2017 Calendar

2018 Calendar

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NOTES:
TRACKING SIERRA CONDITIONS CAREFULLY
2019

2018
The High Sierra resupply spots are all opening up this month or early the next, a good sign that we should have our trip plans and logistics down and done by now.
We have planned-out every overnight campsite we will sleep at and every individual calorie we will consume by now, meaning that we are about ready to finalize our buckets, seal them up, and determine the exact timing of their shipment to best match our anticipated arrival date.

2017:
SIERRA HIGHWAYS ALL CLOSED FOURTH WEEK OF MAY

Review
May 2017 against May 2016

2016:
SIERRA HIGHWAYS OPENING SECOND WEEK OF MAY

2015:
A Deluge of wet and sloppy weather, rain, hail, snow and lightening begins.
The beginning of a sloppy Summer of 2015.

2015
Earliest Opening of Roads and Trails in History?

MAY 1 STATUS 2015
2% of Average Snowpack

MAY 1 STATUS 2016
55% of Average Snowpack

MAY 1 STATUS 2017
194% of Average Snowpack

MAY 1 STATUS 2018
27% of Average Snowpack

CA REPORT, MAY 2018

TWISTED SEASONS
Hottest then Wettest Years Ever over Two Years

Generally,
May gives us a good indication of the unfolding trajectory of Spring.

Specifically,
2016
It is clear that the most powerful and enduring El Nino in history had the effect of leaving us with about half a "normal" snowpack in May.

The big "takeaway" from all these past forty years is the significant changes in fundamental weather patterns.

Weather patterns have broken down in lockstep with the unlimited growth of population, offshore production, and consumption.

Our pattern must change if we hope to pull the weather patterns back into fruitful configurations.

2016:

"Spring" bloomed in Feb.!

"Summer" heat is rising in Late May!

OPENING DATE ASSESMENT
opening of the High Trails across Mountain Passes.

North Sierra opens by May 29.

South Sierra still in Spring Snow Conditions
May 29

High Sierra Backpacker Weather

2017:

Memorial Day
Ten feet of snow on the Crest

Huge bloom everywhere else from the overwhelming supply of water after so long with so little.

2014 Calendar 2015 Calendar

2016 Calendar 2017 Calendar

May 2015 Tracking the Drought page
May 2015 Tracking the Sierra Conditions page.

2018 Calendar

2016 OBSERVATIONS AND TRACKING

WHEN WILL THE SIERRA OPEN in 2016?

TRACKING 2016 CONDITIONS

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Permits
Yosemite National Park and Desolation Wilderness accept reservations six months in advance for Summer backpacking dates.

June 2016 reservations are available in January, July in February, and so on.

Yosemite Permits

Desolation Wilderness

Hoover Wilderness

BACKGROUND
The trajectory of the cold, rain, and snows of Spring provide both excellent backpacking experiences and establish the terms, a baseline for this year’s transition into Spring Conditions.

Regular storm activity laid atop a deep pack of Winter snows wrapped in cold temps indicate a long Winter into Spring transition.

Light snows and irregular storm activity sprinkled on a thin snow pack under high temperatures indicates an early and rapid transitions into Spring and Summer conditions.

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2019

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