Killer Sunset at The Sisters near Carson Pass
Lake Tahoe to Mount Whitney: Crown Jewel of the Pacific Crest Trail
Need a Map? Lost Al near Lost Keys Lake
Emigrant Wilderness under Tropical Thunderstorm, September.
Round Top Lake
Whitebarks and Grizzly Peak in Emigrant Wilderness under Tropical Clouds during September 2013
Lost Keys Lake
 

Lake Tahoe to Mount Whitney
Trail Guide, Magazine, & High Sierra Backpacker's Trails and Topics Forums

 


HIGH SIERRA BACKPACKER'S

Calendar

 

March
2020

 

Important Seasonal Happenings, Transitions, Events, & Dates
for
High Sierra Backpackers

 

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

 

 

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LAST YEAR"S
News
2019
High Sierra
News
Winter
of
2019
2019
Natural Meltdown

 


2020
High Sierra
Backpacking Calendar

2020 INDEX

January         February         March         April         May         June

July         August         September         October         November         December

 

March
2020

Week 1

Week 2

Week 3

Week 4

Week 5

Week 6

TRAILHEAD

Round Top
Summit City Canyon from Mount Reba.

ROUND TOP

Gateway to Summit City Creek & the first unmaintained segment of the Tahoe to Yosemite Trail

Trail Guide           Map           Miles and Elevations

 

Labeled Image

Trail Guide          Map          Miles and Elevations

 

End of February

 

March 2020

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

Sunday Monday Tuesday Wednesday Thursday Friday Saturday

 

MARCH

LAST MONTH

NEXT WEEK

TOP

 

Backpackers
Shift to Fall Gear well under way. Be ready for last bursts of Cold Winter 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
2015 REPORTS

July 2015
Current chances of experiencing
SEVERE WEATHER are INCREASED.

 

 

 

Hiking the PCT
in
2020?

From the Trail Guide

The
Earliest, Latest, and Average Start Dates

How Will This Year Stack-Up?

ON THE CALENDAR

Earliest
Start Date
Winter of 2015
Driest in History

Average
Start Date
Winter of 2016
An Average Year

Latest
Start Date
Winter of 2017

Wettest in History

When are the trails along the Sierra Crest going to be passable this year?

These three years highlighted above offer the potential range of Weather Conditions within which this year's PCTer,
"Start Date," the date you can reasonably expect to encounter fairly snow-free trails with post-deadly fording conditions, will be
determined within. These are the historic limits of wet and dry, with a perfectly average year thrown in-between.

This date, of course, depends upon your ability to navigate snow at high altitude, along with your ability to cross the various stages of the dangerous thaw waters draining off it.

You can get through before and after the period of high-flow runoff, but not during this phase.

How the conditions of the Winter to Spring
Transition we track this year measures-up to the classic trajectories of these three years cited above will inform potential PCT hikers about the snow/trail conditions along the High Sierra Crest they may reasonably expect to encounter during May, June, and July of this year measure-up against those of the Driest year in history against an Average Year, against the wettest Year in History...

This year of 2020 will fit somewhere between these historic parameters of the record Wettest and record Driest years that happened between
2015 and 2017.

As our seasonal start date for open access to trails along the High Sierra Crest will be adjusted according to the character and trajectory of this year's Winter to Spring Transition, we will watch it carefully.

Advice for
Rookie Hikers wishing to hike the TYT-JMT-PCT

25 FEBRUARY 2020

Clear & Warm
Early Summer-Like
HEAT

Record-Level
Temps

note
Cold Nights at High Elevations, despite warmth at lower elevations, have been preserving this thin snowpack.

Now it is warming at High Elevations.

 

 

 

 

LAST MONTH

NEXT WEEK

TOP

 

 

Hiking the PCT
in
2020?

From the Trail Guide

The
Earliest, Latest, and Average Start Dates

How Will This Year Stack-Up?

ON THE CALENDAR

Earliest
Start Date
Winter of 2015
Driest in History

Average
Start Date
Winter of 2016
An Average-Dry Year

Latest
Start Date
Winter of 2017

Wettest in History

When are the trails along the Sierra Crest going to be passable this year?

Upcoming
Weather Probabilities

These three years highlighted above offer the potential range of Weather Conditions within which this year's PCTer,
"Start Date," the date you can reasonably expect to encounter fairly snow-free trails with post-deadly fording conditions, will be determined within. These are the historic limits of wet and dry, with a perfectly average year thrown in-between, for good measure.

This date, of course, depends upon your ability to navigate snow at high altitude, along with your ability to cross the various stages of the dangerous thaw waters draining off it.

And your fitness, of course. You are training, are you not?

You can get through before and after the period of high-flow runoff, but not during this phase.

How the conditions of the Winter to Spring
Transition we track this year measures-up to the classic trajectories of these three years cited above will inform potential PCT hikers about the snow/trail conditions along the High Sierra Crest they may reasonably expect to encounter during May, June, and July of this year measure-up against those of the Driest year in history against an Average Year, against the wettest Year in History...

This year of 2020 will fit somewhere between these historic parameters of the record Wettest and record Driest years that happened between
2015 and 2017.

As our seasonal start date for open access to trails along the High Sierra Crest will be adjusted according to the character and trajectory of this year's Winter to Spring Transition, we will watch it carefully.

 

Advice for
Rookie Hikers wishing to hike the
TYT-JMT-PCT

 

 

2018
Weather Notes
TWISTED SEASONS
Hottest & Driest, then Wettest Year Ever, over Three Years

Compare Years

 

26 FEBRUARY 2020

Clear & Warm
Early Summer-Like
HEAT

Big Blocking Ridge
Big Blocking Ridge
Patterns Note

Big Blocking Ridge
TRENDS

MAPS

 

2020
Snowpack:
Percent of Average for
February 26.

N Sierra: 51%
-6% in 6 days

Cen. Sierra: 46%
-5% in 6 days

S Sierra: 43%
-3% in 6 days

Ca State: 47%
-5% in 6 days

Last Reading
Feb 20

Next Reading
March 2

Statewide Summary of Snow Water Content PDF

 

 

 

 


27 FEBRUARY 2020

Clear & Hot
Summer-Like
HEAT

 

 

 

 

 

 

 

 

2019
Current Snowpack:
Percent of Average for
February 27.

N Sierra: 147%
+20% in 2 days

Cen. Sierra:154%
+0% in 2 days

S Sierra: 146%
+2% in 2 days

Ca State: 151%
+5% in 2 days

Last Reading
Feb 25

2019

 

28 FEBRUARY 2020

Cooler & Cloudy
Low(s) Passing
to our
North

 

 

 

 

 

Informative
"Normal" Vs. Now

Forcasts & Reality
vs.
Averages

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This Week
TOP


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This Week
TOP

29 FEBRUARY 2020

Cooler & Cloudy
Weak Low
Off
North Ca Coast

Drawing
Tropical Moisture North

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LAST MONTH

NEXT WEEK

TOP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LAST MONTH

NEXT WEEK

TOP

 

 

Sunday Monday Tuesday Wednesday Thursday Friday Saturday

1

Cooler & Cloudy
Weak Low Passing
across
North Sierra

Cool Day

light
SNOW!

See the Snow

COLD
Night

 

Summer Hiking
Plans

Permits
In agreement with the progress of Spring?

 

March 2015
Driest Year in History

March 2016
An Average-Dry Year

March 2017
Wettest Year in History

March 2018
Dry Year

March 2019
Wet Year

 

2019
Current Snowpack:
Percent of Average for
March 1.

N Sierra: 152%
+5% in 2 days

Cen. Sierra:156%
+2% in 2 days

S Sierra: 147%
+1% in 2 days

Ca State: 153%
+2% in 2 days

2019

 

2018
Snowpack:

Percent of Average for
March 1.
(Change since Feb 24.)

N Sierra: 20%
(+3%)

Cen. Sierra: 27%
(+4%)

S Sierra: 22%
(+3%)

Ca State: 24%
(+5%)

Last
Feb 24, 2018

March 2018

Statewide Summary of Snow Water Content PDF

 

2018, End of Feb
Snow Depths & Temps

 

 

2017 March
Snow Depths & Temps

2017
Current Snowpack:
Percent of Average for
March 1.

N Sierra: 159%

Cen. Sierra: 191%

S Sierra: 201%

Ca State: 185%

2017

 

2016
Snotel Station Reports Current Snow Depth
Carson Pass
47 & 26 degrees, 64"

Ebbetts Pass
49 & 30 degrees, 58"

Sonora Pass
48 & 30 degrees, 50''

Tuolumne Meadows
23 & 53 degrees, 43"

March of 2016

March of 2015

2

Clearing
Weak Low Passing
across
North Sierra

Warm Day

WIND ADVISORIES

2020
Snowpack:
Percent of Average for
March 2.

N Sierra: 47%
-4% in 5 days

Cen. Sierra: 44%
2% in 5 days

S Sierra: 39%
4% in 5 days

Ca State: 44%
3% in 5 days

Last Reading
Feb 26

Last Reading
March 9

Statewide Summary of Snow Water Content PDF

 

 

Station Reports
The
THIRTEENTH

--WINTER--
Temp-Snow
Check

March 2
2020

11 AM - 11 AM

Below: Watershed Snow Water Content Charts followed by individual reporting station's Snow Depth and 24 hour high-low temps.

Last Report:
Feb 27

Next Report:
March 8

Tahoe Basin
Watershed

Southwest Tahoe
Trail Map with Stations

PCT-TYT-TRT
Rubicon
38.0 +8.00
(13.80) + 0.40
7618 feet
Trail Map
29 & 19 /

PCT-TYT-TRT
Echo Peak
45.0 +6

(22.00) + 0.40
7652 feet
Stations Map
28 & 19 /

American-Yuba Watersheds

PCT-TYT
Carson Pass
44.0 +4
(15.80) +0.20
8388 feet
Trail Map
Stations Map
34 & 14 /

Carson-Walker
Watershed
s

PCT-TYT
Ebbetts Pass
47.0 +8
(21.6) +0.50
8660 feet
Trail Map
24 & 13 /

West of PCT
Highlands Meadow
5.86
−0.7
(19.76) −0.71
8360 feet
Trail Map
21 & 12 /

Top of List

EAST FLANK
Leavitt Lake
70.0 +13.0
(17.30) +0.70
9602 feet, East Flank
Trail Map
19 & 8 /

EAST FLANK
Marine Base
Cold Weather Training

6748 feet East Flank
Trail Map Above
FULL REPORT
VIS-CHIL-WEA-MB-
WIND
31 & 22 /+

Mokelumne-Stanislaus Watersheds

PCT-TYT
Sonora Pass

Kennedy Meadows
RESUPPLY
Deadman Creek

27.23 +4.35
(--.--)
9250 feet,West Flank,
Trail Map
19 & 7 /

Tuolumne-Merced
Watersheds

SW of TYT
Horse Meadow
Error =0.4 ???
8602 feet
Trail Map
26 & 13 /

Top of List

Tenaya Lake
35.47 +4.33
(4.61) + 0.01
8163 feet, West Flank
Trail Map
34 & 16 /

JMT-PCT-TYT
Tuolumne Meadows

20.04 +2.39
(4.06) +0.01
8600 feet, West Flank
Trail Map
31 & 13 /

Tioga Pass/Dana
ERROR +ERROR
(1.71) =0.00 ??
9798 feet
Trail Map
22 & 4 /

Mammoth Mountain

Mono Lake-Owens Basin

East of PCT-JMT
Above Gem Lake
Gem Pass
(error)
10750 feet
Trail Map
temps bad

JMT-PCT Junction
Devils Postpile
8.37 +8.37
(8.95) +0.30
8004 feet
Trail Map Above
30 & 16 /

NE of JMT-PCT
Mammoth Pass
52.02 +12.95
(0.64) = +.64
9500 feet
Trail Map
22 & 7 /

Top of List

JMT-PCT
E of Bear Ridge

Volcanic Knob
33.80 +1.1
(0.00) = ??
10100 feet
Trail Map
28 & 11 /

East Flank
South Lake Cabin

no snow sensor
(29.20) +0.1
9580 feet, East Flank
Trail Map
39 & 3 /

East Flank
Big Pine Sawmill

17.60 +1.6
10200 feet, East Flank
Trail Map Above
25 & 0 /

Kings River

Just East JMT-PCT
Bishop Pass
(bad)
(0.0) =
11972 feet
Trail Map Above
-- & -- / (earlier)

Just West JMT-PCT
Charlotte Lake
xx.xx ERROR?-
(73.03) +0.31
10398 feet, West Flank
Trail Map
23 & 9 /
(Typically the coldest station)


Kern Watershed

JMT-PCT
Upr Tyndall Creek

36.15 +2.46
11441 feet
Trail Map
20 & 3 /

JMT
Crabtree Meadow

xx.xx ERROR −X.XX
(34.03) 0.04
10,700 feet
Trail Map
26 & 11 /

? = questionable data

All High Sierra
Reporting Stations

More Stations, by Watersheds

 

Top of List

 

2018, Start o March
Snow Depths & Temps

3

Clear & Warm
Summer-Like
WARMTH

 

HIGH SIERRA
SNOW INFO
All Snow Info
SNOW STATUS
&
FORECASTS

THE SNOWPACK
GRAPHICS

Date-Adjustable
High Sierra Snowpack Status

 

NOAA-NOHRSC
The High Sierra
3-2-20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REALTIME
High Sierra Crestline
Reporting Stations
WINTER
2020

Fall to Winter

Compare Today
with
Snow
&
Temperatures

on
March 8

March 2

Feb 27

Feb 20

Feb 10

Feb 3

Jan 28

Jan 23

Jan 13 & 17

Jan 8

Jan 2

Dec 30

Dec 24

 

4

Clear & Warm
Summer-Like
WARMTH

 

LAST WEEK

NEXT WEEK

TOP

 

 

 

 

 

 

BEST
FORECASTS

HAZARDS

 

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

SATELLITES

 

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

 

 

 

 

 

This Week
TOP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This Week
TOP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This Week
TOP

5

Cooler & Cloudy
Weak Lows Approach

Seven Day
Freezing Temperatures
Probability Model

 

Point
Forecasts

Lake Tahoe Forecast

Walker Forecast

Sonora Pass Forecast

Cherry Lake Forecast

Lee Vining Forecast

Tuolumne Meadows

Mammoth Pass

Lake Thomas Edison

Mount Whitney-Lone Pine

Lake Isabella Forecast

Move the Map Dot
to
Customize Forecast Point

Trail Maps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2018
Snowpack:

Percent of Average for
March 5.
(Change since Mar 1.)

N Sierra: 30%
(+10%)

Cen. Sierra: 43%
(+16%)

S Sierra: 37%
(+15%)

Ca State: 37%
(+13%)

2018

6

Light Precip Late
Weak Low

 

DROUGHT
CONSIDERATIONS

 

Mountain Safety
AVALANCHE DANGERS

Winter Backpacking
Considerations

 

 

 

Deep Snow in the Mountains (?), Spring on the Horizon (?)...

I'm Pumped. Am I ready?
I Want Skittles!

Navigation
&
Snow

 

 

 

 

 

 

 

 

Informative
"Normal" Vs. Now

Forcasts & Reality
vs.
Averages

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LAST WEEK

NEXT WEEK

TOP

 

7

Light Precip Early
Weak Low

 

 

 

 

 

 

 

 

 

 

 

 

LAST WEEK

NEXT WEEK

TOP

 

 

 

 

 

2019
Current Snowpack:
Percent of Average for
March 7.

N Sierra: 158%
+5% in 3 days

Cen. Sierra:164%
+5% in 3 days

S Sierra: 161%
+12% in 3 days

Ca State: 161%
+6% in 3 days

2019

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2017
Cold, Cloudy, but Warming

High Building off Ca Coast

Snow Depth,
24 hour high & low temps.

Carson Pass 138"
(44.90" H2O)
25 & 12

Ebbetts Pass 163"
23 & 10

Deadman Creek
(42.48" H20)
39 & 11

Leavitt Lake SNO " BAD
(57.1" H20)
29 & 6

2017

 

 

 

 

 

LAST WEEK

NEXT WEEK

TOP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LAST WEEK

NEXT WEEK

TOP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LAST WEEK

NEXT WEEK

TOP

 

Sunday Monday Tuesday Wednesday Thursday Friday Saturday

8

Cloudy
Weak Lows Approach

 

2 AM
Start
of
Daylight Savings

Spring Forward, Fall Back...

 

DAYLIGHT SAVINGS TIME

THE DST RULES
NIST

PDT
Information

Move clocks one hour Forward in time.

"Spring Forward,
Fall Back."

Why do we think we can manipulate Time & Nature, when the main thing we are changing, screwing-up, is ourselves?

Well, Nature too...

CRITICAL

Our
LOCAL
Measurement of Time
from
Greenwich Time, at.
"Longitute O,"
AKA,
"Zulu Time,"
or
"UTC,"
to the
West Coast & High Sierra
Shifts from


Z-8=PST
to
Z-7=PDT

PDT Ends
November 8

 

Station Reports
The
FOURTEENTH

--WINTER--
Temp-Snow
Check

March 8
2020

3 PM - 3 PM

Below: Watershed Snow Water Content Charts followed by individual reporting station's Snow Depth and 24 hour high-low temps.

Last Report:
March 2

Next Report:
March 13

Tahoe Basin
Watershed

Southwest Tahoe
Trail Map with Stations

PCT-TYT-TRT (3 PM)
Rubicon
26.0 12.00
(14.20) + 0.40
7618 feet
Trail Map
37 & 26 +/+

PCT-TYT-TRT (3 PM)
Echo Peak
38.0 7

(22.30) + 0.30
7652 feet
Stations Map
37 & 25 +/+

American-Yuba Watersheds

PCT-TYT
Carson Pass (3 PM)
36.0 8
(16.20) +0.40
8388 feet
Trail Map
Stations Map
36 & 19 +/+

Carson-Walker
Watershed
s

PCT-TYT
Ebbetts Pass (3 PM)
36.0 11
(21.8) +0.20
8660 feet
Trail Map
33 & 19 +/+

West of PCT (9 PM)
Highlands Meadow
4.59
−1.27
(20.58) +0.82
8360 feet
Trail Map
30 & 11 +/

Top of List

EAST FLANK
Leavitt Lake
(3 PM)
63.0 −7.0
(17.70) +0.40
9602 feet, East Flank
Trail Map
34 & 16 +/+

EAST FLANK (9 PM)
Marine Base
Cold Weather Training

6748 feet East Flank
Trail Map Above
FULL REPORT
VIS-CHIL-WEA-MB-
WIND
58 & 34 +/+

Mokelumne-Stanislaus Watersheds

PCT-TYT (8 PM)
Sonora Pass
Kennedy Meadows
RESUPPLY
Deadman Creek

21.14 6.09
(--.--)
9250 feet,West Flank,
Trail Map
33 & 5 +/+

Tuolumne-Merced
Watersheds

SW of TYT (10 PM)
Horse Meadow
Error =0.4 ???
8602 feet
Trail Map
33 & 3 +/

Top of List

Tenaya Lake (10 PM)
29.74 5.73
(5.13) +0.52
8163 feet, West Flank
Trail Map
33 & 11 /

JMT-PCT-TYT (10PM)
Tuolumne Meadows

13.15 −6.89
(4.23) +0.17
8600 feet, West Flank
Trail Map
41 & 7 +/

Tioga Pass/Dana
ERROR +ERROR
(2.01) +0.30 ??
9798 feet
Trail Map
35 & 5 +/+

Mammoth Mountain

Mono Lake-Owens Basin

East of PCT-JMT
Above Gem Lake
Gem Pass
(error)
10750 feet
Trail Map
temps bad

JMT-PCT Junction
Devils Postpile
0.13 8.24
(9.02) +0.07
8004 feet
Trail Map Above
37 & 13 +/

NE of JMT-PCT
Mammoth Pass
41.12 −10.9
(1.96) = +1.32
9500 feet
Trail Map
34 & 11 +/+

Top of List

JMT-PCT
E of Bear Ridge

Volcanic Knob
32.20 −1.6
(0.00) = ??
10100 feet
Trail Map
38 & 3 +/

East Flank
South Lake Cabin

no snow sensor
(29.20) =0.0
9580 feet, East Flank
Trail Map
39 & 8 =/+

East Flank
Big Pine Sawmill

14.10 −3.5
10200 feet, East Flank
Trail Map Above
36 & 5 +/+

Kings River

Just East JMT-PCT
Bishop Pass
(bad)
(0.0) =
11972 feet
Trail Map Above
-- & -- / (earlier)

Just West JMT-PCT
Charlotte Lake
17.91 ERROR?-
(73.17) +0.14
10398 feet, West Flank
Trail Map
33 & 4 +/
(Typically the coldest station)


Kern Watershed

JMT-PCT
Upr Tyndall Creek

32.37 −3.78
11441 feet
Trail Map
35 & 10 +/+

JMT
Crabtree Meadow

xx.xx ERROR −X.XX
(34.21) +0.18
10,700 feet
Trail Map
36 & 6 +/

? = questionable data

All High Sierra
Reporting Stations

More Stations, by Watersheds

 

Top of List

 

 

 

2017
Weather
Status & Potential

 

2016
Marine Weather;
No precip.
Snotel Station Reports
Current Snow Depth
Carson Pass
37 & 24 degrees, 85"

Ebbetts Pass
32 & 22 degrees, 87"'

Sonora Pass
31 & 23 degrees, 67"

Tuolumne Meadows
5 & 30 degrees, 54"

2016

 

9

Cloudy to Clearing
WARM
Weak Tropical Lows
Approach

See Note,
Feb 22

Warnings

NWS RENO
E SIERRA WEEKEND ADV
Upcoming Weekend

NWS SACTO
NADA

NWS HANFORD
Winter Advisory
Tuesday-Tuesday Night

Flash Flood Warning
Tuesday-Tuesday Night

NWS VEGAS
E. SIERRA FLANK FLSH FLD
Tuesday Night

 

 

2020
Snowpack:
Percent of Average for
March 9.

N Sierra: 42%
-5% in 7 days

Cen. Sierra: 37%
7% in 7 days

S Sierra: 35%
4% in 7 days

Ca State: 38%
6% in 7 days

Last Reading
Mar 2

Next Reading
Mar 17

Statewide Summary of Snow Water Content PDF

Last 100% Reading
December 26, 2019

 

 

 

LAST WEEK

NEXT WEEK

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10

Clear to Cloudy
WARM
Weak Tropical Flow
Influenced by
Weak Offshore Low
Sweeps South of SoCal

See Note,
Feb 22

Warnings

NWS RENO
E SIERRA WEEKEND ADV
Upcoming Weekend

NWS SACTO
NADA

NWS HANFORD
Winter Advisory
Tuesday-Tuesday Night

Flash Flood Warning
Tuesday-Tuesday Night

NWS VEGAS
E. SIERRA FLANK FLSH FLD
Tuesday Night

 

Now

RADAR

SATELLITES

 

 

2019
Current Snowpack:
Percent of Average for
March 10.

N Sierra: 156%
-2% in 3 days

Cen. Sierra:165%
+1% in 3 days

S Sierra: 162%
+2% in 3 days

Ca State: 161%
=0% in 3 days

2019

 

 

 

 

 

 

REALTIME
High Sierra Crestline
Reporting Stations
WINTER
2020

Fall to Winter

Compare Today
with
Snow
&
Temperatures

on
March 8

March 2

Feb 27

Feb 20

Feb 10

Feb 3

Jan 28

Jan 23

Jan 13 & 17

Jan 8

Jan 2

Dec 30

Dec 24

 

11

Increasing Clouds
Cooler, Still Warm

 

 

BEST
FORECASTS

HAZARDS

 

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

SATELLITES

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This Week
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12

Increasing Clouds
Cooler, Still Warm
Northern Low Approachs

The Script Flips
Our last weak storm came out of the Southwest, out of the Tropics. Not this one.

This weak storm is coming out of the North, pushed down uder a vast decending High...

 

All Maps

 

 

Point
Forecasts

Lake Tahoe Forecast

Walker Forecast

Sonora Pass Forecast

Cherry Lake Forecast

Lee Vining Forecast

Tuolumne Meadows

Mammoth Pass

Lake Thomas Edison

Mount Whitney-Lone Pine

Lake Isabella Forecast

Move the Map Dot
to
Customize Forecast Point

Trail Maps

 

 

 

 

 

 

 

 

 

 

 

2018
Snow Depths & Temps

 

 

 

 

 

 

 

2017
Snow & Temps

13

Increasing Clouds
Warm
Northern Low Approachs

Warnings

NWS RENO
E SIERRA WEEKEND ADV
Fri-Mon

NWS SACTO
Winter Storm Warning
Sat-Mon

NWS HANFORD
Winter Watch
Sat-Mon

 

 

Informative
"Normal" Vs. Now

Forcasts & Reality
vs.
Averages

See Note,
Feb 22

 

 

 

 

 

 

 

 

 

 

 

 

 

Station Reports
The
FIFTEENTH

--WINTER--
Temp-Snow
Check

March 13
2020

5 PM - 5 PM

Below: Watershed Snow Water Content Charts followed by individual reporting station's Snow Depth and 24 hour high-low temps.

Last Report:
March 8

Next Report:
March 17

Tahoe Basin
Watershed

Southwest Tahoe
Trail Map with Stations

PCT-TYT-TRT (3 PM)
Rubicon
30.0 +4.00
(14.30) + 0.10
7618 feet
Trail Map
46 & 33 +/+

PCT-TYT-TRT (3 PM)
Echo Peak
35.0 3

(22.20)0.10
7652 feet
Stations Map
47 & 32 +/+

American-Yuba Watersheds

PCT-TYT
Carson Pass
34.0 2
(16.20) =0.00
8388 feet
Trail Map
Stations Map
46 & 26 +/+

Carson-Walker
Watershed
s

PCT-TYT
Ebbetts Pass
35.0 1
(21.9) +0.10
8660 feet
Trail Map
43 & 27 +/+

West of PCT
Highlands Meadow
1.11
−3.48
(21.08) +0.50
8360 feet
Trail Map
38 & 20 +/+

Top of List

EAST FLANK
Leavitt Lake

62.0 −1.0
(17.70) =0.00
9602 feet, East Flank
Trail Map
41 & 27 +/+

EAST FLANK
Marine Base
Cold Weather Training

6748 feet East Flank
Trail Map Above
FULL REPORT
VIS-CHIL-WEA-MB-
WIND
58 & 23 =/

Mokelumne-Stanislaus Watersheds

PCT-TYT
Sonora Pass
Kennedy Meadows
RESUPPLY
Deadman Creek

19.28 1.86
(--.--)
9250 feet,West Flank,
Trail Map
40 & 5 +/+

Tuolumne-Merced
Watersheds

SW of TYT (10 PM)
Horse Meadow
Error =0.4 ???
8602 feet
Trail Map
42 & 23 +/+

Top of List

Tenaya Lake (10 PM)
25.98 3.76
(5.13) = 0.00
8163 feet, West Flank
Trail Map
42 & 25 +/+

JMT-PCT-TYT (10PM)
Tuolumne Meadows

8.43 −4.72
(4.23) =0.00
8600 feet, West Flank
Trail Map
45 & 23 +/+

Tioga Pass/Dana
ERROR +ERROR
(2.06) +0.05 ??
9798 feet
Trail Map
39 & 20 +/+

Mammoth Mountain

Mono Lake-Owens Basin

East of PCT-JMT
Above Gem Lake
Gem Pass
(error)
10750 feet
Trail Map
temps bad

JMT-PCT Junction
Devils Postpile
0.08 0.05
(9.07) +0.05
8004 feet
Trail Map Above
44 & 26 +/+

NE of JMT-PCT
Mammoth Pass
40.71 −0.41
(2.08) = +0.12
9500 feet
Trail Map
41 & 27 +/+

Top of List

JMT-PCT
E of Bear Ridge

Volcanic Knob
32.20 −1.6
(0.00) = ??
10100 feet
Trail Map
38 & 3 +/

East Flank
South Lake Cabin

no snow sensor
(29.20) =0.0
9580 feet, East Flank
Trail Map
46 &27 =/+

East Flank
Big Pine Sawmill

13.20 −0.9
10200 feet, East Flank
Trail Map Above
40 & 25 +/+

Kings River

Just East JMT-PCT
Bishop Pass
(bad)
(0.0) =
11972 feet
Trail Map Above
-- & -- / (earlier)

Just West JMT-PCT
Charlotte Lake
0.03 17.88?-
(73.68) +0.51
10398 feet, West Flank
Trail Map
36 & 26 +/+
(Typically the coldest station)


Kern Watershed

JMT-PCT
Upr Tyndall Creek

32.95 +0.58
11441 feet
Trail Map
36 & 19 +/+

JMT
Crabtree Meadow

xx.xx ERROR −X.XX
(34.68) +0.47
10,700 feet
Trail Map
37 & 24 +/+

? = questionable data

All High Sierra
Reporting Stations

More Stations, by Watersheds

 

Top of List

 

 

 

 

 

 

 

 

 

 

 

This Week
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14

Weak Lows
Moving Down Ca Coast

Warnings

NWS RENO
E SIERRA FIRE WATCH!?
Fri-Mon

NWS SACTO
Winter Storm Warning
Sat-Mon

NWS HANFORD
Winter Watch
Sat-Mon

LOWs
Dragging & Pushing
WET
Cold Fronts

The end of the Fronts leading to these Lows appear to be shifting from being rooted in the Arctic to the Tropics...

MAPS
The Pacific Ocean

All Maps

 

CalTrans

 

Tahoe to Whitney
&
PCT--JMT
Hikers

Order food, prep resupply packages, and repair gear:
TRAINED?
...

Resupply

 

 

 

 

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2018
Snowpack:

Percent of Average for
March 14
+/- change since
March 5

N Sierra: 32%
(+2%)

Cen. Sierra: 43%
(+0%)

S Sierra: 38%
(+1%)

Ca State: 38%
(+1%)

2018

 

 

 

2016
No precip.
Snotel Station Reports
Current Snow Depth

Carson Pass
32 & 28 degrees, 93 "

Ebbetts Pass
32 & 28 degrees, 91"'

Sonora Pass
33 & 28 degrees, 69"

Tuolumne Meadows
26 & 32 degrees, 56"

2016

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Sunday Monday Tuesday Wednesday Thursday Friday Saturday

15

Showers
Light Precip

 

 

LAST WEEK

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2017 March
Snow Depths & Temps

 

 

 

 

March 2016
An Average-Dry Year

2016
Sustained period of no rain beginning now until April 9.

16

Showers & Clearing
Light Precip Diminishing

 

Clearing at Evening Brings
COLD
Night

 

Model
Five Day Mean
Low Temps

Click Green "Latest" Model,
observe using step button

All Temps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2017
TTM setting up to begin Monday-Tuesday next?

(Tropical Transport Mechanism)

17

Saint Pat's Day

Clearing
Light Showers
Diminishing --
Ending

LOW
Over NW Nevada

 

Clearing Evenings Bring
COLD
Nights

 

2020
Snowpack:
Percent of Average for
March 17

N Sierra: 48%
+6% in 8 days

Cen. Sierra: 50%
+13% in 8 days

S Sierra: 39%
+4% in 8 days

Ca State: 47%
+9% in 8 days

Last Reading
Mar 9

Next Reading
Mar 24

Statewide Summary of Snow Water Content PDF

 

 

Last 100% Reading
December 26, 2019

 

 

Station Reports
The
SIXTEENTH

--WINTER--
Temp-Snow
Check

March 17
2020

2 PM - 2 PM

Below: Watershed Snow Water Content Charts followed by individual reporting station's Snow Depth and 24 hour high-low temps.

Last Report:
March 13

Next Report:
March 25

Tahoe Basin
Watershed

Southwest Tahoe
Trail Map with Stations

PCT-TYT-TRT
Rubicon
63.0 +33.00
(18.20) + 3.90 !!
7618 feet
Trail Map
31 & 18 /

PCT-TYT-TRT
Echo Peak
74.0 +39

(27.90) + 5.70 !!
7652 feet
Stations Map
32 & 18 /

American-Yuba Watersheds

PCT-TYT
Carson Pass
74.0 +40
(21.20) +5.00 !!
8388 feet
Trail Map
Stations Map
31 & 14 /

Carson-Walker
Watershed
s

PCT-TYT
Ebbetts Pass
63.0 +28
(27.10) +5.20 !!
8660 feet
Trail Map
32 & 14 /

West of PCT
Highlands Meadow
14.22
+13.11
(23.29) +2.21
8360 feet
Trail Map
27 & 13 /

Top of List

EAST FLANK
Leavitt Lake

91.0 +29.0
(20.90) +3.20
9602 feet, East Flank
Trail Map
29 & 11 /

EAST FLANK
Marine Base
Cold Weather Training

6748 feet East Flank
Trail Map Above
FULL REPORT
VIS-CHIL-WEA-MB-
WIND
34 & 21 /

Mokelumne-Stanislaus Watersheds

PCT-TYT
Sonora Pass
Kennedy Meadows
RESUPPLY
Deadman Creek

26.27 +6.99
(--.--)
9250 feet,West Flank,
Trail Map
26 & 2 /

Tuolumne-Merced
Watersheds

SW of TYT
Horse Meadow
Error =0.4 ???
8602 feet
Trail Map
26 & 10 /

Top of List

Tenaya Lake
49.35 +23.37
(5.29) + 0.16 ??
8163 feet, West Flank
Trail Map
30 & 1 /

JMT-PCT-TYT (10PM)
Tuolumne Meadows

16.52 +8.09
(4.96) +0.73 ??
8600 feet, West Flank
Trail Map
31 & 0 −/

Tioga Pass/Dana
ERROR +ERROR
(2.08) +0.02 ??
9798 feet
Trail Map
24 & 0 −/

Mammoth Mountain

Mono Lake-Owens Basin

East of PCT-JMT
Above Gem Lake
Gem Pass
(error)
10750 feet
Trail Map
temps bad

JMT-PCT Junction
Devils Postpile
16.59 +16.51 !!
(10.28) +1.21
8004 feet
Trail Map Above
27 & 5 −/

NE of JMT-PCT
Mammoth Pass
73.49 +32.78
(6.72) = +4.64
9500 feet
Trail Map
26 & 4 −/

Top of List

JMT-PCT
E of Bear Ridge

Volcanic Knob
40.10 +7.9
(0.00) = ??
10100 feet
Trail Map
28 &4 /

East Flank
South Lake Cabin

no snow sensor
(29.30) +0.1
9580 feet, East Flank
Trail Map
24 & 2 /

East Flank
Big Pine Sawmill

17.80 +4.6
10200 feet, East Flank
Trail Map Above
20 & 0 /

Kings River

Just East JMT-PCT
Bishop Pass
(bad)
(0.0) =
11972 feet
Trail Map Above
-- & -- / (earlier)

Just West JMT-PCT
Charlotte Lake
4.38 +4.35 ?-
(73.81) +0.13
10398 feet, West Flank
Trail Map
23 & −7 /
(Typically the coldest station)


Kern Watershed

JMT-PCT
Upr Tyndall Creek

35.39 +2.44
11441 feet
Trail Map
18 & −2 /

JMT
Crabtree Meadow

xx.xx ERROR −X.XX
(34.98) +0.30
10,700 feet
Trail Map
20 & −7 /

? = questionable data

All High Sierra
Reporting Stations

More Stations, by Watersheds

 

Top of List

 

18

Showers & Clearing
Light Precip Diminishing

 

COOL
Days
At Elevation...

COLD
Nights

 

 

HIGH SIERRA
SNOW INFO
All Snow Info
SNOW STATUS
&
FORECASTS

THE SNOWPACK
GRAPHICS

Date-Adjustable
High Sierra Snowpack Status

 

NOAA-NOHRSC
The High Sierra
3-18-20

 

 

 

Point
Forecasts

Lake Tahoe Forecast

Walker Forecast

Sonora Pass Forecast

Cherry Lake Forecast

Lee Vining Forecast

Tuolumne Meadows

Mammoth Pass

Lake Thomas Edison

Mount Whitney-Lone Pine

Lake Isabella Forecast

Move the Map Dot
to
Customize Forecast Point

Trail Maps

 

 

2015
UPDATE
Virtually No Rain,
hot temperatures,
little snow in the Sierra.

Carson Pass
measures 22 inches.

Tuolumne Meadows
.20 of an inch

2015

 

 

19

Vernal
Equinox

First Day of Spring

Happens
Wednesday, March 20, 2020 at 03:50 Universal Time, So because our local, "Daylight Savings Time," puts us 7 hours behind Greenwich,

PDT = UT - 7
(PDT Shift)

03:50 - 7hr =

8:50 PM, March 19,
PDT.

The
Vernal Equinox
VIDEO

A Terrestrial Year from Space,
APOD, March 19, 2017.

 

Trail Guide
Seasonal Observer

Time References

 

 

 

 

This Week
TOP

 

 

 

 

BEST
FORECASTS

HAZARDS

 

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

SATELLITES

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This Week
TOP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This Week
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This Week
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20

Vernal
Equinox

First Day of Spring

8:50 PM, March 19,
PDT.

 

Cloudy to Clearing
Light Precip Diminishing

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2018
Snowpack:

Percent of Average for
March 20
+/- change since
March 14

N Sierra: 40%
(+8%)

Cen. Sierra: 55%
(+12%)

S Sierra: 43%
(+5%)

Ca State: 48%
(+10%)

2018

21

Cloudy
to
Clearing

 

 

 

 

 

LAST WEEK

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2019
Current Snowpack:
Percent of Average for
March 21.

N Sierra: 151%
-1% in 3 days

Cen. Sierra:160%
-5% in 3 days

S Sierra: 154%
=% in 3 days

Ca State: 156%
=% in 3 days

2019

 

 

 

 

 

 

 

 

 

 

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LAST WEEK

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LAST WEEK

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Sunday Monday Tuesday Wednesday Thursday Friday Saturday

22

Increasing Clouds
Cooler, Still Warm
Southern Low Approachs

 

The Script Flips
Our last weak storm came out of the North, around the Gulf Alaska. Not this one.

This weak storm is coming out of the South, slipping around the bottom of a vast decending High... With Northern Lows coming around its top at the same time!

See March 12, above

 

LAST WEEK

NEXT WEEK

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2017 March
Snow Depths & Temps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LAST WEEK

NEXT WEEK

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23

Scattered Showers
Light Precip

 

 

Point
Forecasts

Lake Tahoe Forecast

Walker Forecast

Sonora Pass Forecast

Cherry Lake Forecast

Lee Vining Forecast

Tuolumne Meadows

Mammoth Pass

Lake Thomas Edison

Mount Whitney-Lone Pine

Lake Isabella Forecast

Move the Map Dot
to
Customize Forecast Point

Trail Maps

 

 

2018
Snowpack:

Percent of Average for
March 23
+/- change since
March 22

N Sierra: 44%
(+1%)

Cen. Sierra: 65%
(+4%)

S Sierra: 57%
(+7%)

Ca State: 56%
(+3%)

2018

 

 

 

 

 

 

 

 

 

 

This Week
TOP

24

Showers
Light Precip

 

 

 

 

2020
Snowpack:
Percent of Average for
March 24

N Sierra: 51%
+3% in 8 days

Cen. Sierra: 53%
+3% in 8 days

S Sierra: 41%
+2% in 8 days

Ca State: 49%
+2% in 8 days

Last Reading
Mar 17

Statewide Summary of Snow Water Content PDF

HIGH SIERRA
SNOW INFO
All Snow Info
SNOW STATUS
&
FORECASTS

THE SNOWPACK
GRAPHICS

Date-Adjustable
High Sierra Snowpack Status

 

NOAA-NOHRSC
The High Sierra
3-24-20

 


25

Clouds Clearing
Diminishing Showers
Cooler

Warning

NWS HANFORD
Winter Advisory
Thru Thursday Afternoon

 

2020
Snowpack:
Percent of Average for
March 25

N Sierra: 53%
+2% in 1 day

Cen. Sierra: 55%
+2% in 1 day

S Sierra: 42%
+1% in 1 day

Ca State: 51%
+2% in 1 day

Last Reading
Mar 24

Statewide Summary of Snow Water Content PDF

 

 

Clearing at Evening Brings
COLD
Night

 

 

Station Reports
The
FIRST

--SPRING--
Temp-Snow
Check

March 25
2020

Afternoon-Evening

Below: Watershed Snow Water Content Charts followed by individual reporting station's Snow Depth and 24 hour high-low temps.

Last Report:
March 17

Next Report:
March 2020-

Tahoe Basin
Watershed

Southwest Tahoe
Trail Map with Stations

PCT-TYT-TRT
Rubicon
63.0 =0.00
(18.20) + 1.80 !!
7618 feet
Trail Map
29 & 20 /+

PCT-TYT-TRT
Echo Peak
71.0 3

(29.10) +1.20
7652 feet
Stations Map
27 & 20 /+

American-Yuba Watersheds

PCT-TYT
Carson Pass
67.0 7.0
(22.50) +1.30
8388 feet
Trail Map
Stations Map
28 & 19 /+

Carson-Walker
Watershed
s

PCT-TYT
Ebbetts Pass
68.0 +5
(28.60) +1.50 !!
8660 feet
Trail Map
25 & 18 /+

West of PCT
Highlands Meadow
20.41
+6.19
(24.50) +1.21
8360 feet
Trail Map
21 & 15 /+

Top of List

EAST FLANK
Leavitt Lake

99.0 +8
(22.60) +1.7
9602 feet, East Flank
Trail Map
23 & 17 /+

EAST FLANK
Marine Base
Cold Weather Training

6748 feet East Flank
Trail Map Above
FULL REPORT
VIS-CHIL-WEA-MB-
WIND
42 & 27 +/+

Mokelumne-Stanislaus Watersheds

PCT-TYT
Sonora Pass
Kennedy Meadows
RESUPPLY
Deadman Creek

43.23 +16.96
(--.--)
9250 feet,West Flank,
Trail Map
22 & 17 +/+

Tuolumne-Merced
Watersheds

SW of TYT
Horse Meadow
Error =0.4 ???
8602 feet
Trail Map
24 & 16 /+

Top of List

Tenaya Lake
52.13 +2.78
(5.29) = 0.00 ??
8163 feet, West Flank
Trail Map
24 & 18 /+

JMT-PCT-TYT (10PM)
Tuolumne Meadows

15.95 −0.57
(5.74) +0.78 ??
8600 feet, West Flank
Trail Map
27 & 17 −/+

Tioga Pass/Dana
ERROR +ERROR
(2.09) +0.01 ??
9798 feet
Trail Map
19 & 12 −/+

Mammoth Mountain

Mono Lake-Owens Basin

East of PCT-JMT
Above Gem Lake
Gem Pass
(error)
10750 feet
Trail Map
temps bad

JMT-PCT Junction
Devils Postpile
18.51 +1.92
(11.31) +1.03
8004 feet
Trail Map Above
25 & 21 −/+

NE of JMT-PCT
Mammoth Pass
78.73 +5.24
(9.08) = +2.36
9500 feet
Trail Map
21 & 17 −/+

Top of List

JMT-PCT
E of Bear Ridge

Volcanic Knob
44.60 +4.5
(0.00) = ??
10100 feet
Trail Map
27 & 14 /+

East Flank
South Lake Cabin

no snow sensor
(29.50) +0.2
9580 feet, East Flank
Trail Map
26 & 15 +/+

East Flank
Big Pine Sawmill

16.30 1.5
10200 feet, East Flank
Trail Map Above
24 & 12 +/+

Kings River

Just East JMT-PCT
Bishop Pass
(bad)
(0.0) =
11972 feet
Trail Map Above
-- & -- / (earlier)

Just West JMT-PCT
Charlotte Lake
4.06 −0.32 ?-
(74.45) +0.64
10398 feet, West Flank
Trail Map
24 & 10 +/+
(Typically the coldest station)


Kern Watershed

JMT-PCT
Upr Tyndall Creek

34.50 −0.89
11441 feet
Trail Map
24 & 10 +/+

JMT
Crabtree Meadow

xx.xx ERROR −X.XX
(35.29) +0.31
10,700 feet
Trail Map
26 & 9 +/+

? = questionable data

All High Sierra
Reporting Stations

More Stations, by Watersheds

 

Top of List

 

 

2015
Carson Pass
21 inches of snow
42 degrees at 11am

Ebbetts Pass
13 inches of snow
43 degrees at 11am

26

Clouds Clearing
Diminishing Showers
Cooler

 

Clearing at Evening Brings
COLD
Night

 

Warnings

NWS RENO
NADA

NWS SACTO
NADA

 

 

2019
Current Snowpack:
Percent of Average for
March 26.

N Sierra: 155%
+4% in 5 days

Cen. Sierra:161%
-1% in 5 days

S Sierra: 154%
=% in 5 days

Ca State: 157%
+1% in 5 days

2019

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Our Selected
REALTIME
High Sierra Crestline
Reporting Stations
REPORTING

The

WINTER

of
2020

Compare Today
with
Snow
&
Temperatures

on
March 17

March 8 & 13

March 2

Feb 27

Feb 20

Feb 10

Feb 3

Jan 28

Jan 23

Jan 13 & 17

Jan 8

Jan 2

Dec 30

Dec 24

 

Setting the Table
for
WINTER

Fall to Winter
2019
Reports

27

 

 

Informative
"Normal" Vs. Now

Forcasts & Reality
vs.
Averages

 

 

 

 

 

 

 

 

 

 

 

 

2018
Snowpack:

Percent of Average for
March 27
+/- change since
March 23

N Sierra: 48%
(+4%)

Cen. Sierra: 65%
(=%)

S Sierra: 56%
(-1%)

Ca State: 58%
(+2%)

Last
March 23
March 22
March 20
March 14, 2018
March 5, 2018
March 1, 2018
Feb 24, 2018

Statewide Summary of Snow Water Content PDF

 

2017
Current Snowpack:
Percent of Average for
March 27.

N Sierra: 145%

Cen. Sierra: 174%

S Sierra: 166%

Ca State: 163%

2017

 

 

 

 

 

 

 

 

 

 

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28

 

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BEST
FORECASTS

HAZARDS

 

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

SATELLITES

 

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

 

 

 

 

 

 

 

 

 

 

 

 

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Sunday Monday Tuesday Wednesday Thursday Friday Saturday

29

.

LAST WEEK

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2017 March
Snow Depths & Temps

30

 

31

 

 

Snow Depth
at
Carson Pass

2019, the 28th
Carson Pass 117 "

2018, Today
Carson Pass 67"

2017, the 24th
Carson Pass 124"

2016, the 14th
Carson Pass 93"

2015, the 25th
Carson Pass
21 inches of snow

1 APRIL 2020

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2017
Current Snowpack:
Percent of Average for
April 1.

N Sierra: 147%

Cen. Sierra: 175%

S Sierra: 166%

Ca State: 164%

2017
Snow Depths & Temps

2 APRIL 2020

 

 

 

 

 

 

 

 

 

 

 

 

 

2019
Current Snowpack:
Percent of Average for
April 2.

N Sierra: 165%
+3 % in 5 days

Cen. Sierra: 165%
+1 % in 5 days

S Sierra: 153%
-1 % in 5 days

Ca State: 162%
+1 % in 5 days

2019

 

 

 

 

This Week
TOP

3 APRIL 2020

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2018
Snowpack

Percent of Average for
April 3
+/- change since
March 27

N Sierra: 41%
(-7%)

Cen. Sierra: 59%
(-6%)

S Sierra: 49%
(-7%)

Ca State: 51%
(-7%)

2018

4 APRIL 2020

 

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End of Feb

 

2020

January       February     March       April       May       June

July     August     September       October       November       December

 

2014 Calendar          2015 Calendar

2016 Calendar          2017 Calendar

2018 Calendar

2019 Calendar

Classic March
NOTES

Are heavy storms rolling in? From the North or South? Is a pattern forming? Breaking? A new one reforming?

What's Going On!?

 

Seasonal NOTES:

2019
March 1, 2019, Snowpack
153%

March 10, 2019, Snowpack
156%

 

2018

March 1, 2018, Snowpack
24%

April 3, 2018, Snowpack
51%

 

2017

March 1, 2017 Snowpack
201%

April 1, 2018, Snowpack
164%

 

 

 

 

The Seasonal Backpacker

Nature of season.

Seasonal hopes…

If so, our goals, our speed, and our expectations have fully shifted into Winter Mode.

Our changing inner perspective ideally matches external environmental changes.

May your perspective always complement your environment, and visa-versa.

 

2014 Calendar          2015 Calendar

2016 Calendar          2017 Calendar

2018 Calendar

2019 Calendar

 

The Classic March Question
WHAT HAPPENED?
Piercing Cold & Heavy Snow this last month or just “Normal" Cold & Pathetic Snow?

AFTER REPORTS

2019 Answer:
March: Sustained snow & unstable weather brings 161% of snowpack on the 11th, looking like it could match 2017's 164% of snowpack on April 1, which endangered PCTers attempting to enter the Sierra when they would normally expect open trails, and kept snow on the Sierra Crest through the Summer of 2017.

March 6 Warning


Feb: Some cold snaps from North bringing below zero temperatures

2016 Answer:
Hot as heck 1st through the 15th. No Cold.

 

2017 Answer:
Vast Rain and Snowfall from tropical sources typically bring wet, heavy, snow to the Sierra that is subject to chances of of being subjected to rainfall across the Sierra Crest. So it has been during 2017.

Therefore this season could be catagorized as having "warm" Winter conditions, despite the occasional plunges in temps we've seen a couple of times this Winter.

Last year's warmth during Feb was Summer-like, having little resemblence to typical "Wintertime" temps and weather patterns. The Winter heat of 2015 was even more abberent.

This year we are having real Wintertime conditions for the first time since the Winter of 2010-2011, yet this year's temps strike me as being a bit "warm" for typical Winter conditions.

 

 

The Classic March Question
Heavy Snow Storms or None at All?

2019 Answer:
Huge Snow Year, almost as much as 2017.
Anticipating delayed Starts on PCT & JMT

2018 Answer:
Very Weak snowpack, what little was saved by some late cool temps & snow, (which doubled the snowpack through March), but barly made it to, or through, June

2017 Answer:
March. 15 Report
We have gotten pounded with record precip & snow, with late month storms preserving heavy snowpack, despite increasing temps.

Early Implications

1> Not an early start year for PCT-JMT hikers.

2> Potentially dangerous fording and trail conditions Spring & early in Summer.

3> Moist conditions all Summer long feeding mosquitoes all Summer long.

 

2016 Answer:
Feb. 15 Report
No Storms of significance to 15th.
No real storms hitting the Sierra for over two weeks, snow looking funky, coming apart, but high humidity bringing light snow when temps drop...
Snowpack retreating.

2017 Answer:
Adding Complexity
La Nina.

Weakening as of Jan 25. Diminishing, maybe ending...

 

 

February 2019

 

The nature of our Snow Backpacking trips are determined by the character of the snow.

Why?
Deep, soft, wet snow makes for rough going, as does fresh powder.

Cold hard well-packed snow can be faster than good trail.

2017:
BAD SNOW WARNINGS
See Jan 6-7, and Feb 8-9, among other examples of rain across the Sierra Crest

Happy Trails!

Tahoe to Whitney

 

Top of Page

 

2020

January         February         March         April         May         June

July         August         September         October         November         December

 

 

2014 Calendar          2015 Calendar

2016 Calendar          2017 Calendar

2018 Calendar

2019 Calendar

 

Trailhead
 
Contact
Alex Wierbinski

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Lake Tahoe to Mount Whitney

Your guide to backpacking the Sierra Crest, including the Tahoe to Yosemite, Pacific Crest, and John Muir Trails

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