July 2019 High Sierra Backpacking Calendar

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2019	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday
LAST MONTH NEXT WEEK TOP JULY 2019 Backpackers Shift to Summer Gear well under way. Be ready for last bursts of Spring Weather. Ignore the Calendar. Gear up for the Conditions on the Ground, not a Date on the Calendar. High Sierra Backpacker Weather ON THE TRAIL 2019 REPORTS Chaos on the Crest 2018 REPORTS Trails Open on the Crest 2017 REPORTS Chaos on the Crest 2015 REPORTS July 2015 Current chances of experiencing SEVERE WEATHER are INCREASED.	1 Clear Temperate Rapid Thaw Underway Rivers Fierce HEAVY FLOWS FORDING HAZARDS HAZARDS Fording Hazard Snow Travel Hazard Highway 120, Tioga Road Fully Opening July 1, 2019 Road Information LAST MONTH NEXT WEEK TOP 2019 Heavy Spring Snowpack Persisting into Summer 2018 Snowpack (June 14-snow about gone) 2017 Snowpack (extensive at this time) 2015 Snowpack (nothing at this time) 2017 WARNINGS through Fourth of July: Fording Hazard Snow travel Hazard Top	2 Clear Temperate Rapid Thaw Underway Rivers Fierce HEAVY FLOWS FORDING HAZARDS HAZARDS Fording Hazard Snow Travel Hazard 2019 Current Snowpack: Percent of Average for July 2. N Sierra: 108% +28% in 5 days Cen. Sierra: 73% −18% in 5 days S Sierra: 27% −32% in 5 days Ca State: 71% −9% in 5 days Last Reading June 27 Next Reading July 8 Statewide Summary of Snow Water Content PDF 2019 JULY 2 *HIGH SIERRA* SECOND --Summer-- Temp-Snow Check Last Report: June 23, 2019 Next Report: July 7, 2019 Let's check our reporting station snow & temp readings after the last 9 days of warm weather bringing heavy thaw and runoff through the Sierra. 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 0.00"= 7618 feet Trail Map (49.00 H2O) + 0.1 64 & 45 −/− PCT-TYT-TRT Echo Peak 0.0" = 7652 feet Stations Map (68.40 H2O) =0.0 61 & 47 −/+ American-Yuba Watersheds PCT-TYT Carson Pass 0.0" 8388 feet Trail Map Stations Map (49.90" H2O) =0.0 60 & 40 −/+ Carson-Walker Watersheds PCT-TYT Ebbetts Pass 0" = 8660 feet Trail Map (66.30 H2O) = 0.0 58 & 44 −/+ West of PCT Highlands Meadow 0.29" +.29 8360 feet Trail Map (49.78) + 0.03 58 & 38 −/+ EAST FLANK Leavitt Lake 76" −22 9602 feet, East Flank Trail Map (67.80 H20) − 0.2 55 & 45 −/+ EAST FLANK Marine Base Cold Weather Training 6748 feet East Flank Trail Map Above FULL REPORT VIS-CHIL-WEA-MB- WIND 95 &40 +/+ Mokelumne-Stanislaus Watersheds PCT-TYT Sonora Pass Kennedy Meadows RESUPPLY Deadman Creek 0.64" +0.32 9250 feet,West Flank, Trail Map (32.76" H20) −0.27" 58 & 33 =/+ Tuolumne-Merced Watersheds SW of TYT Horse Meadow ERROR" − ?? 8602 feet Trail Map (No H2O) 57 & 31 −/= Tenaya Lake 0.06" -0.06 8163 feet, West Flank Trail Map (23.19") H20 =0.00" 65 & 34 =/− JMT-PCT-TYT Tuolumne Meadows 3.21" +2.57" 8600 feet, West Flank Trail Map (9.34") H20 =0.00" 66 & 30 +/− Tioga Pass/Dana 180.3" +0.8 ?? 9798 feet Trail Map 15.90 H20 =0.00 59 & 33 +/+ Mammoth Mountain Mono Lake-Owens Basin East of PCT-JMT Above Gem Lake Gem Pass 143.60" −2.8 ??? 10750 feet Trail Map (00.00 H2O) −00.00 ?? temps bad JMT-PCT Junction Devils Postpile 2.26" -0.11 8004 feet Trail Map Above (0.0) = 67 & 32 +/− NE of JMT-PCT Mammoth Pass 22.71" Sno −23.59 9500 feet Trail Map 59.32" H2O =0.00 61 & 38 +/+ JMT-PCT E of Bear Ridge Volcanic Knob 1.10" −6.6" 10100 feet Trail Map (0.00) 59 & 32 −/+ East Flank South Lake Cabin (Snow removed ") 9580 feet, East Flank Trail Map (27.20 H2O) =0.00 67 & 43 +/+ East Flank Big Pine Sawmill 2.0" Snow +2.0 10200 feet, East Flank Trail Map Above 61 & 38 +/+ Kings River Just East JMT-PCT Bishop Pass --.-- 11972 feet Trail Map Above BAD- BAD Just West JMT-PCT Charlotte Lake 0.00" Snow −.41 10398 feet, West Flank Trail Map 60.39 H2O -0.13 58 & 34 +/+ (Typically the coldest station) Kern Watershed JMT-PCT Upr Tyndall Creek 23.33" −18.83" 11441 feet Trail Map (x.xx" H2O +x.xx") 63 & 44 +/+ JMT Crabtree Meadow 0.00" Snow =0.00" 10,700 feet Trail Map (25.36 H2O) −0.25 65 & 38 +/+ All High Sierra Reporting Stations More Stations, by Watersheds	3 Clear Temperate Rapid Thaw Underway "Temperate" Not too Hot, Not too Cold! Rivers Fierce HEAVY FLOWS FORDING HAZARDS HAZARDS Fording Hazard Snow Travel Hazard SPRING THAW RIVER INFORMATION RESERVOIRS Watersheds and Selected Network of Crestline Sensors LAST MONTH NEXT WEEK TOP	4 Clear Temperate-Warming Rapid Thaw Underway Minaret Summit Road OPENS TODAY Rivers Fierce HEAVY FLOWS FORDING HAZARDS HAZARDS Fording Hazard Snow Travel Hazard	5 Clear Temperate-Warming Rapid Thaw Underway Modis Satellite Views Compare 2015, 17, 18, & 19 Current Sat Views Rivers Fierce HEAVY FLOWS FORDING HAZARDS HAZARDS Fording Hazard Snow Travel Hazard LAST MONTH NEXT WEEK TOP 2017 Snowpack & Temps	6 Clear Warm Afternoon Cloudy Rivers Fierce HEAVY FLOWS FORDING HAZARDS HAZARDS Fording Hazard Snow Travel Hazard 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 2018 HEATWAVE WEATHER HAZARD WARNINGS Looks Hot for the Next Five Days... T-Storms Wednesday TRANSPO Most 2017 Trans-Sierra Highways & Road NEWS Very Late Openings High Points: June 21 Bishop Creek Shuttle runs June 21 Lakes Basin Road open, Mammoth June 28 Road to Spicer Open Reds Road Closed June 29 Tioga Pass Opens June 30 Ebbetts Pass Opens High Sierra Transportation Resources LAST MONTH NEXT WEEK TOP LAST MONTH NEXT WEEK TOP
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7 Clear Warm-Cloudy Rivers Fierce HEAVY FLOWS FORDING HAZARDS HAZARDS Fording Hazard Snow Travel Hazard 2019 JULY 7 *HIGH SIERRA* THIRD --Summer-- Temp-Snow Check Last Report: July 2, 2019 Next Report: July ?, 2019 Let's check our reporting station snow & temp readings after the last 5 days of warm weather bringing heavy thaw and runoff through the Sierra. 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 0.00"= 7618 feet Trail Map (49.10 H2O) + 0.1 62 & 52 −/+ PCT-TYT-TRT Echo Peak 0.0" = 7652 feet Stations Map (68.50 H2O) +0.1 66 & 50 +/+ American-Yuba Watersheds PCT-TYT Carson Pass 0.0" 8388 feet Trail Map Stations Map (49.90" H2O) =0.0 58 & 42 −/+ Carson-Walker Watersheds PCT-TYT Ebbetts Pass 0" = 8660 feet Trail Map (66.20 H2O) −0.1 58 & 44 =/= West of PCT Highlands Meadow 0.44" +.15 8360 feet Trail Map (49.75) −0.03 59 & 38 +/= EAST FLANK Leavitt Lake 61" −15 9602 feet, East Flank Trail Map (67.80 H20) = 0.0 55 & 46 =/+ EAST FLANK Marine Base Cold Weather Training 6748 feet East Flank Trail Map Above FULL REPORT VIS-CHIL-WEA-MB- WIND 93 & 43 −/+ Mokelumne-Stanislaus Watersheds PCT-TYT Sonora Pass Kennedy Meadows RESUPPLY Deadman Creek 0.72" +0.08 9250 feet,West Flank, Trail Map (32.87" H20) +0.11" 58 & 34 =/= Tuolumne-Merced Watersheds SW of TYT Horse Meadow ERROR" − ?? 8602 feet Trail Map (No H2O) 57 & 33 =/+ Tenaya Lake 0.07" +0.01 8163 feet, West Flank Trail Map (23.19") H20 =0.00" 64 & 36 −/+ JMT-PCT-TYT Tuolumne Meadows 2.61" −0.6" 8600 feet, West Flank Trail Map (9.34") H20 =0.00" 62 & 33 −/+ Tioga Pass/Dana 180.7" +0.4 ?? 9798 feet Trail Map 15.90 H20 =0.00 55 & 33 −/= Mammoth Mountain Mono Lake-Owens Basin East of PCT-JMT Above Gem Lake Gem Pass 15X.XX" −2.8 ERROR 10750 feet Trail Map (00.00 H2O) −00.00 ?? temps bad JMT-PCT Junction Devils Postpile 2.39" +0.13 8004 feet Trail Map Above (0.0) = 64 & 36 −/+ NE of JMT-PCT Mammoth Pass 7.69" Sno −15.02 9500 feet Trail Map 59.32" H2O =0.00 59 & 40 −/+ JMT-PCT E of Bear Ridge Volcanic Knob 1.0" −0.1" 10100 feet Trail Map (0.00) 57 & 34 −/+ East Flank South Lake Cabin (Snow removed ") 9580 feet, East Flank Trail Map (27.20 H2O) =0.00 63 & 45 −/+ East Flank Big Pine Sawmill 2.3" Snow +0.3 10200 feet, East Flank Trail Map Above 57 & 38 −/= Kings River Just East JMT-PCT Bishop Pass --.-- 11972 feet Trail Map Above BAD- BAD Just West JMT-PCT Charlotte Lake 0.00" Snow −.41 10398 feet, West Flank Trail Map 60.35 H2O −0.04 56 & 36 −/+ (Typically the coldest station) Kern Watershed JMT-PCT Upr Tyndall Creek 14.44" −8.89" 11441 feet Trail Map (x.xx" H2O +x.xx") 60 & 42 −/− JMT Crabtree Meadow 0.00" Snow =0.00" 10,700 feet Trail Map (25.36 H2O) = 0.0 61 & 36 −/− All High Sierra Reporting Stations More Stations, by Watersheds	8 Clear Warm-Cooler Rivers Fierce HEAVY FLOWS FORDING HAZARDS HAZARDS Fording Hazard Snow Travel Hazard 2019 Current Snowpack: Percent of Average for July 8. N Sierra: 176% +68% in 6 days Cen. Sierra: 0% −73% in 6 days S Sierra: 0% −27% in 6 days Ca State: 33% −38% in 6 days Last Reading July 2 Next Reading July ? Statewide Summary of Snow Water Content PDF *Still* LOTS of SNOW at High Elevations and Protected NE Facing Aspects, See: Modis Satellite Views Compare 2015, 17, 18, & 19 Current Sat Views 2018 GEORGES FIRE Whitney Portal Top	9 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 7-7-19 OBSERVATIONS All High Sierra Reporting Stations Temp & Snow Tables by Watershed and Highway Corridor LAST WEEK NEXT WEEK Top	10 Clear Warming Rivers Fierce HEAVY FLOWS FORDING HAZARDS HAZARDS Fording Hazard Snow Travel Hazard LAST WEEK NEXT WEEK Top 2017 Snowpack & Temps	11 Clear Warm to Hot Rivers Fierce HEAVY FLOWS FORDING HAZARDS HAZARDS Fording Hazard Snow Travel Hazard 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	12 Clear Hot Rivers Fierce HEAVY FLOWS FORDING HAZARDS HAZARDS Fording Hazard Snow Travel Hazard MOSQUITOES Mosquitoes rise when the snows melt. Mosquitoes are typically THICK right now. A dry year? Then less skeeters. A wet year? Then more. 2015 was a good model for dry years, being the driest on record. 2017 provides a good model for wet years, as it recorded the most snow ever measured. 2015 Calendar 2 017 Calendar 2018 has come in at roughly 50% of a "normal" Winter's average snowpack, putting us smack-dab in the middle, between the extremes of 2015 & 2017	13 *Still* LOTS of SNOW at High Elevations and Protected NE Facing Aspects LAST WEEK NEXT WEEK Top SPRING THAW RIVER INFORMATION RESERVOIRS Watersheds and Selected Network of Crestline Sensors LAST WEEK NEXT WEEK Top LAST WEEK NEXT WEEK Top LAST WEEK NEXT WEEK Top
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14 Clear HOT Rivers Moderating MODERATE FLOWS Nonetheless... FORDING HAZARDS continue HAZARDS Fording Hazard Diminishing Soon Snow Travel Hazard Snow Breaking Down 2019 JULY 14 *HIGH SIERRA* FOURTH --Summer-- Temp-Snow Check Last Report: July 7, 2019 Next Report: Aug 16, 2019 Let's check our reporting station snow & temp readings after the last 7 days of warm weather bringing heavy thaw and runoff through the Sierra. 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 0.00"= 7618 feet Trail Map (48.90 H2O) −0.2 70 & 55 +/+ PCT-TYT-TRT Echo Peak 0.0" = 7652 feet Stations Map (68.40 H2O) −0.1 69 & 58 +/+ American-Yuba Watersheds PCT-TYT Carson Pass 0.0" 8388 feet Trail Map Stations Map (49.70" H2O) −0.2 68 & 51 +/+ Carson-Walker Watersheds PCT-TYT Ebbetts Pass 0" = 8660 feet Trail Map (66.30 H2O) + 0.1 67 &54 +/+ West of PCT Highlands Meadow 0.02" −.42 8360 feet Trail Map (50.08) + 0.33 54 & 43 +/+ EAST FLANK Leavitt Lake 39" −22 9602 feet, East Flank Trail Map (68.00 H20) + 0.2 64 & 53 +/+ EAST FLANK Marine Base Cold Weather Training 6748 feet East Flank Trail Map Above FULL REPORT VIS-CHIL-WEA-MB- WIND 99 & 45 +/+ Mokelumne-Stanislaus Watersheds PCT-TYT Sonora Pass Kennedy Meadows RESUPPLY Deadman Creek 0.39" +0.33 9250 feet,West Flank, Trail Map (33.25" H20) +0.38" 64 & 52 +/+ Tuolumne-Merced Watersheds SW of TYT Horse Meadow ERROR" − ?? 8602 feet Trail Map (No H2O) 63 & 39 +/+ Tenaya Lake 0.01" −0.06 8163 feet, West Flank Trail Map (23.19") H20 =0.00" 69 & 41 +/+ JMT-PCT-TYT Tuolumne Meadows 2.59" −0.03" 8600 feet, West Flank Trail Map (9.34") H20 =0.00" 69 & 36 +/+ Tioga Pass/Dana ERROR" 0.0 ?? 9798 feet Trail Map 15.90 H20 =0.00 63 & 40 +/+ Mammoth Mountain Mono Lake-Owens Basin East of PCT-JMT Above Gem Lake Gem Pass 15X.XX" −0.0 ERROR 10750 feet Trail Map (00.00 H2O) −00.00 ?? temps bad JMT-PCT Junction Devils Postpile 2.39" −1.2 8004 feet Trail Map Above (0.0) = 72 & 38 +/+ NE of JMT-PCT Mammoth Pass 0.00" Sno −7.69 9500 feet Trail Map 59.32" H2O =0.00 68 & 48 +/+ JMT-PCT E of Bear Ridge Volcanic Knob 1.3" +0.3" 10100 feet Trail Map (0.00) 63 & 39 +/+ East Flank South Lake Cabin (Snow removed ") 9580 feet, East Flank Trail Map (27.20 H2O) =0.00 69 &50 +/+ East Flank Big Pine Sawmill 0.1" Snow −1.2 10200 feet, East Flank Trail Map Above 64 & 45 +/+ Kings River Just East JMT-PCT Bishop Pass --.-- 11972 feet Trail Map Above BAD- BAD Just West JMT-PCT Charlotte Lake 0.00" Snow =.00 10398 feet, West Flank Trail Map 60.77 H2O +0.42 64 & 40 +/+ (Typically the coldest station) Kern Watershed JMT-PCT Upr Tyndall Creek 2.43" −12.01" 11441 feet Trail Map (x.xx" H2O +x.xx") 64 & 45 +/+ JMT Crabtree Meadow 0.00" Snow =0.00" 10,700 feet Trail Map (25.36 H2O) + 0.37 64 & 40 +/+ All High Sierra Reporting Stations More Stations, by Watersheds 2017 Heat Advisories. Warm to Hot. 2016 Beautiful weather in the Sierra. Warm to Hot. 2015 REPORTS: Remnants of Baja Ca Hurricane drawn North into LA, South Deserts, and bringing more tropical storms to Sierra Nevada: LA Floods Hwy 10 Closed by Flash Flood	15 LAST WEEK NEXT WEEK Top 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 7-14-19 OBSERVATIONS All High Sierra Reporting Stations Temp & Snow Tables by Watershed and Highway Corridor	16 Modis Satellite Views Compare 2015, 17, 18, & 19 Current Sat Views 2018 FERGUSON FIRE Yosemite Foothills HEAT ADVISORY Valley-Foothills-Mountains continuing Warm to Hot 2016 Hot and Clear 2015 REPORTS: It has been a "Tropical Summer," so far. This trend began in mid-May.	17 SPRING THAW RIVER INFORMATION RESERVOIRS Watersheds and Selected Network of Crestline Sensors 2017 Snowpack & Temps 2017 Heavy snow at high altitudes preserves the: SNOW TRAVEL HAZARD, but now mostly limited to higher up the flanks & crest. Still lots of snow on parts of Sierra Crest, less on others.	18 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	19 Clear HOT 2017 FULL SMOKE-FIRE ALERT Detwiler Fire Smoke inundates Tahoe-Carson-Reno areas, (alert) All backpackers and visitors to the Sierra should check smoke and fire conditions. Smoke can be a real problem, even with no fire in near proximity. Fire & Smoke CalFire Inciweb Fed Smoke All Recent Trail News	20 Clear HOT 51 degrees at 8AM at 8000 feet of Elevation LAST WEEK NEXT WEEK Top LAST WEEK NEXT WEEK Top LAST WEEK NEXT WEEK Top
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21 Clear HOT 51 degrees at 8AM at 8000 feet of Elevation	22 LAST WEEK NEXT WEEK Top	23 THE CURRENT SNOWPACK Current Conditions All Snow Information GRAPHICS Date-Adjustable Multi-Aspect High Sierra Snowpack Status THE 23rd NOAA-NOHRSC SNOWPACK The High Sierra 7-23-19 OBSERVATIONS All High Sierra Reporting Stations Temp & Snow Tables by Watershed and Highway Corridor	24 Scouting Trip to Sierra Nevada 16th to 22nd Carson Pass Ebbetts Pass Lake Alpine Not Cold!! PCT hikers at both Passes report thinning snow across Southern Sierra High passes, (virtually none on North Sierra North of Leavitt Peak), diminishishing rivers & streams, and heavy mosquitoes. Extensive Snow remaining on NE facing aspects. Major Rivers are flowing deeply, but slowly. FIRE NOTE Ground still Moist up High in the Sierra 2018 FIRE-SMOKE-HEAT -WARNINGS- Until Further Notice Yosemite Valley & Wawona to be Closed to Public from 25th to 29th FERGUSON FIRE Yosemite Foothills 2017 Snowpack & Temps	25 Clear HOT Rivers Moderating MODERATE FLOWS Nonetheless... FORDING HAZARDS continue HAZARDS Fording Hazard Diminishing Soon Snow Travel Hazard Snow Breaking Down 2018 Yosemite Valley Closed	26 Clear HEATING FURTHER T-STORM WARNING Eastern Sierra Ending with Day Valley Heat Adv (Drives T-Storms) Sat-Sun Lightening Forecasts & Safety Information LAST WEEK NEXT WEEK Top SPRING THAW RIVER INFORMATION RESERVOIRS Watersheds and Selected Network of Crestline Sensors	27 Clear HOTTER A Brief Heatwave 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 2018 Yosemite Delays opening Valley for five days, until August 3 Fire Information 2017 "The New Normal" The Drought Never Ended
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28 2018 CARR & CRANSTON FIRES, Socal 2017 Detwiler Fire being brought under control, Tahoe Basin Fire Resrtictions.	29 SPRING THAW RIVER INFORMATION RESERVOIRS Watersheds and Selected Network of Crestline Sensors	30 LAST WEEK NEXT MONTH Top 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	31 2018 Valley Opening Delayed to 8-5 ROAD NEWS June Lake Loop Closed 2017 Snowpack & Temps 2017 Safety News Fording Fatality on PCT. Detwiler Fire 90% contained. Trail News July 31, 2017 2017 Heavy snow at high altitudes preserves the: SNOW TRAVEL HAZARD, but now mostly limited to higher up the flanks & crest. Still lots of snow on parts of Sierra Crest, less on others. High Altitude Trips are STILL SNOW TRIPS Date-Adjustable High Sierra Snowpack Status Amazing Sat Views Continuing high runoff flows maintain the FORDING HAZARD. HOT TEMPS PERSIST, and must be monitored. FIRE & SMOKE hazards are present & increasing. MOSQUITOES are a THREAT. Water & Snow Hazards are gradually narrowing as this unique season progresses, while Heat, Fire, and Skeeter threats are rapidly rising.	1August THE CURRENT SNOWPACK Current Conditions All Snow Information GRAPHICS Date-Adjustable Multi-Aspect High Sierra Snowpack Status THE 23rd NOAA-NOHRSC SNOWPACK The High Sierra 7-23-19 OBSERVATIONS All High Sierra Reporting Stations Temp & Snow Tables by Watershed and Highway Corridor	2 August LAST WEEK NEXT MONTH Top	3 August LAST WEEK NEXT MONTH Top LAST WEEK NEXT MONTH Top

As snow travel and fording dangers receede on the High Sierra terrain, the next danger grows in the skies.

July brings the peak of the Summer Thunderstorm Season in the High Sierra.
These are typically local weather, caused by heat waves in the San Joaquin Valley swept up the West Sierra Flank.

Hot wet air on a fast ride up the West Sierra flank to high elevations squeezes out what can be substantial daily rain and lightening activity lasting between 2 pm and sunset.

Don’t cross open ground under one of these storms. They are deadly. Lightening and Fording are the leading causes of High Sierra backpacker deaths.

2015 HISTORY
This year's constant series of thunderstorms are tropically born, not local. These thunderstorms are the product of distant moisture-rich tropical air being driven North by air currents generated by the intense tropical thunderstorm activity that generated them in the first place. These moisture rich airs are then sucked across the Sierra by an aberrant series of stubborn unstable low pressure zones over California and the West Coast of the U.S.

Road Conditions, Resupply, Seasonal Transition Concerns, Permit Dates, Weather, Water, and Mosquitoes

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Alex Wierbinski

Lake Tahoe to Mount Whitney

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