CA/NV Snow Storms January 25-27, 2008 Discussion & Analysis

[srainhoutx]

Still Going...

http://forecast.weather.gov/wwamap/wwat ... %20warning

http://www.wrh.noaa.gov/forecast/MapCli ... 9&map.y=32

Should be great powder for the trip out. Can't ask for anthing better, great friends and good snow.

[srainhoutx]

Another big storm for CA/NV this weekend...

http://www.wrh.noaa.gov/sto/

[srainhoutx]

Big storm for CA/NV and further east to follow...


URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
606 PM PST SAT JAN 26 2008

...ANOTHER WINTER STORM IS HEADED TO THE CENTRAL CALIFORNIA
INTERIOR...

.ANOTHER WINTER STORM IS POISED TO BRING HEAVY SNOW TO THE
SOUTHERN SIERRA NEVADA AND TEHACHAPI MOUNTAINS TONIGHT THROUGH
SUNDAY EVENING. THIS SYSTEM WILL HAVE WARMER AIR THAN ITS
PREDECESSOR SO SNOW LEVELS ARE EXPECTED TO REMAIN ABOVE MAJOR
PASS LEVELS IN KERN COUNTY.

CAZ096-097-271200-
/O.CON.KHNX.WS.W.0004.080127T0500Z-080128T0800Z/
SIERRA NEVADA FROM YOSEMITE TO KINGS CANYON-
TULARE COUNTY MOUNTAINS-
606 PM PST SAT JAN 26 2008

...WINTER STORM WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING
TO MIDNIGHT PST SUNDAY NIGHT FOR THE SOUTHERN SIERRA NEVADA FROM
YOSEMITE NATIONAL PARK TO THE KERN COUNTY LINE...

THE NATIONAL WEATHER SERVICE IN HANFORD HAS ISSUED A WINTER STORM
WARNING...WHICH REMAINS IN EFFECT FROM 9 PM THIS EVENING TO MIDNIGHT
PST SUNDAY NIGHT FOR THE SOUTHERN SIERRA NEVADA...FROM YOSEMITE
NATIONAL PARK TO THE KERN COUNTY LINE.

MOISTURE BEING PULLED NORTHWARD BY A STRONG UPPER LOW PRESSURE
SYSTEM IS FORECAST TO MOVE INTO AND ACROSS THE SOUTHERN SIERRA
NEVADA TONIGHT THROUGH SUNDAY EVENING AND WINTER STORM CONDITIONS
ARE POSSIBLE. SNOW LEVELS WITH THIS STORM ARE EXPECTED TO RANGE
BETWEEN 6500 AND 7000 FEET INITIALLY THEN LOWER TO AROUND
4000 FEET BY SUNDAY EVENING. HEAVY SNOW ACCUMULATIONS OF UP TO
5 FEET ARE POSSIBLE ABOVE 8000 FEET. WINDS WILL ALSO BE STRONG
AND GUSTY.

STAY TUNED TO NOAA WEATHER RADIO...OR YOUR FAVORITE MEDIA
SOURCE...FOR FURTHER INFORMATION ON THIS WINTER WEATHER EVENT.

$$

WEATHER.GOV/HANFORD

http://forecast.weather.gov/wwamap/wwat ... %20warning


NEPAC IR SAT Loop...

http://www.srh.noaa.gov/tropical/satpix ... 4_loop.php

Warnings...



http://www.srh.noaa.gov/nat_hazard.php

[srainhoutx]

Interesting Bow Echo as Low moves in with much colder temps this evening...

http://radar.weather.gov/radar.php?rid= ... 1&loop=yes

MESOSCALE DISCUSSION 0095
NWS STORM PREDICTION CENTER NORMAN OK
0609 PM CST SUN JAN 27 2008

AREAS AFFECTED...SHASTA/SISKIYOU MTNS AND THE SIERRA NEVADA MTNS

CONCERNING...HEAVY SNOW

VALID 280009Z - 280615Z

HEAVY SNOW WILL DEVELOP OVER THE SIERRA NEVADA MTNS THROUGH THE
EVENING HOURS. HRLY ACCUMULATION RATES OVER 2 INCH/HR WILL BE
POSSIBLE...ESPECIALLY ALONG WEST FACING SLOPES OF THE NRN SIERRA
NEVADA MTNS. HEAVY SNOW WILL END BY 06Z OVER THE SHASTA/SISKIYOU
MTNS OF NRN CA.

IN THE WAKE OF AN UPPER VORT LOBE MOVING ACROSS THE CENTRAL VALLEY
OF CENTRAL CA...LOW LEVEL WINDS WERE VEERING /PER SFC OBS AND VWP
DATA/. INCREASING SWLY UPSLOPE FLOW /30-40 KTS/ OVER THE CENTRAL/SRN
SIERRA NEVADA WILL OCCUR IN THE WAKE OF THIS UPPER VORT LOBE OVER
THE NEXT SEVERAL HRS. STEEP MID LEVEL LAPSE RATES COMBINED WITH
INCREASING LOW LEVEL VERTICAL MOTION WILL SUPPORT HEAVY SNOWFALL
RATES OVER 1 INCH/HR ABOVE 5000 FT THROUGH 06Z. FURTHER
NORTH...STRONG FRONTOGENETIC FORCING AHEAD OF AN UPPER VORT
LOBE/TROUGH MOVING SEWD OFF THE ORE COAST WILL SUPPORT HEAVY
SNOWFALL OVER THE SHASTA/SISKIYOU MTNS FOR THE NEXT SEVERAL
HRS...BEFORE A GRADUAL DIMINISHING TREND ENSUES. LOW LEVEL CAA WILL
CONTINUE TO SUPPORT LOWERING SNOW LEVELS IN THIS REGION TO BETWEEN
1000-2000 FT. STRENGTHENING/VEERING LOW LEVEL WINDS AHEAD OF THIS
SYSTEM JUXTAPOSED WITH THE FRONTOGENETIC FORCING IN THE DENDRITIC
SNOW GROWTH LAYER SHOULD SUPPORT SNOWFALL RATES OVER 2 INCH/HR ALONG
WEST FACING SLOPES OF THE NRN SIERRA NEVADA BETWEEN 03-06Z.
INITIALLY SNOWFALL LEVELS WILL START OUT AROUND 5000 FT IN THE NRN
SIERRA NEVADA...BUT WILL LOWER TO BETWEEN 3000 FT BEFORE THE
STRONGEST FORCING MOVES AWAY FROM THE REGION.

..CROSBIE.. 01/28/2008


http://www.spc.noaa.gov/products/md/md0095.html