HAZARDOUS WEATHER OUTLOOK
Issue Date: 525 AM PST THU DEC 10 2009
Expiration: 700 AM PST FRI DEC 11 2009

Expires:200912111500;;
FLUS46 KSTO 101325
HWOSTO
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SACRAMENTO CA
530 AM PST THU DEC 10 2009
CAZ013>019-063-064-066>069-111500-
SHASTA LAKE AREA/NORTHERN SHASTA COUNTY-
BURNEY BASIN/EASTERN SHASTA COUNTY-NORTHERN SACRAMENTO VALLEY-
CENTRAL SACRAMENTO VALLEY-SOUTHERN SACRAMENTO VALLEY-
CARQUINEZ STRAIT AND DELTA-NORTHERN SAN JOAQUIN VALLEY-
MOUNTAINS SOUTHWESTERN SHASTA TO NORTHERN LAKE COUNTIES-
CLEAR LAKE/SOUTHERN LAKE COUNTY-MOTHERLODE-
EAST FOOTHILLS/NORTH SACRAMENTO VALLEY-
WESTERN PLUMAS COUNTY/LASSEN PARK-WEST SLOPE NORTHERN SIERRA NEVADA-
530 AM PST THU DEC 10 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR INTERIOR NORTHERN CALIFORNIA.
.DAY ONE...TODAY
UNUSUALLY COLD TEMPERATURES CONTINUE THIS MORNING IN THE NORTHERN
AND CENTRAL SACRAMENTO VALLEY WITH WIDESPREAD BELOW FREEZING THROUGH
MID TO LATE MORNING. PACIFIC STORM WILL BRING PERIODS OF HEAVY SNOW
TO THE SIERRA NEVADA STARTING TONIGHT.
* FREEZE WARNING.............SEE WWUS76 KSTO - NPWSTO FOR DETAILS *
* WINTER STORM WATCH.........SEE WWUS46 KSTO - WSWSTO FOR DETAILS *
.DAYS TWO THROUGH SEVEN... FRIDAY THROUGH WEDNESDAY
A SERIES OF STORMS WILL MOVE THROUGH FRIDAY INTO SUNDAY BRINGING
PERIODS OF HEAVY SNOW AND STRONG WINDS TO THE SIERRA NEVADA.
* WINTER STORM WATCH.........SEE WWUS46 KSTO - WSWSTO FOR DETAILS *
.SPOTTER INFORMATION STATEMENT...
WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS TO THEIR LOCAL NATIONAL WEATHER SERVICE OFFICE.
THE LATEST WEATHER INFORMATION IS AVAILABLE ON THE INTERNET AT
(LOWER CASE): HTTP://WWW.WRH.NOAA.GOV/STO
$$

WINTER STORM WATCH
Issue Date: 446 AM PST THU DEC 10 2009
Expiration: 400 AM PST SUN DEC 13 2009

...STRONG STORM EXPECTED FOR FRIDAY NIGHT AND SATURDAY...
.A DISTURBANCE OFF THE NORTHERN CALIFORNIA COAST WILL MOVE INTO
THE SIERRA AND WESTERN NEVADA THURSDAY NIGHT AND FRIDAY. A LIGHT
SNOWFALL IS EXPECTED IN THE SIERRA AND OUT INTO WESTERN NEVADA BY
FRIDAY MORNING...WHICH MAY CAUSE SOME TRAVEL DIFFICULTIES.
A SECOND...MUCH STRONGER SYSTEM IS EXPECTED FOR FRIDAY NIGHT AND
SATURDAY. THERE ARE STILL SIGNIFICANT MODEL DIFFERENCES AS TO
LOCATION AND AMOUNT OF SNOWFALL IN THE SIERRA. HOWEVER...HEAVY SNOWFALL
COULD FALL FOR PORTIONS OF THE SIERRA FROM FRIDAY NIGHT TO
SATURDAY NIGHT.
CAZ071>073-NVZ002-110115-
/O.NEW.KREV.WS.A.0006.091212T0600Z-091213T1200Z/
LASSEN-EASTERN PLUMAS-EASTERN SIERRA COUNTIES-
GREATER LAKE TAHOE AREA-MONO-
INCLUDING THE CITIES OF...PORTOLA...SUSANVILLE...
SOUTH LAKE TAHOE...TRUCKEE...BRIDGEPORT...MAMMOTH LAKES...
INCLINE VILLAGE
446 AM PST THU DEC 10 2009
...WINTER STORM WATCH IN EFFECT FROM FRIDAY EVENING THROUGH LATE
SATURDAY NIGHT...
THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A WINTER STORM
WATCH...WHICH IS IN EFFECT FROM FRIDAY EVENING THROUGH LATE
SATURDAY NIGHT.
* TIMING: SNOW SHOWERS IN THE SIERRA ARE EXPECTED TO INTENSIFY
FRIDAY EVENING...WITH PERIODS OF MODERATE TO HEAVY SNOWFALL
POSSIBLE THROUGH LATE SATURDAY NIGHT.
* TOTAL SNOW ACCUMULATIONS: ONE TO THREE FEET ABOVE 6000 FEET...WITH
LESSER AMOUNTS DOWN TO LOWER VALLEY FLOORS.
* WINDS: SOUTH TO SOUTHWEST WINDS 15 TO 30 MPH WITH GUSTS TO 45
MPH. RIDGE GUSTS OVER 100 MPH ARE POSSIBLE SATURDAY AND SATURDAY
NIGHT.
* SNOW LEVELS: BELOW ALL VALLEY FLOORS FRIDAY EVENING...POSSIBLY
RISING TO 5500 FEET SATURDAY MORNING BEFORE FALLING BELOW ALL
VALLEY FLOORS AGAIN BY SATURDAY EVENING.
* IMPACTS: MAJOR TRAVEL DIFFICULTIES POSSIBLE OVER SIERRA PASSES
WITH NEAR WHITEOUT CONDITIONS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THERE IS A POTENTIAL FOR SIGNIFICANT SNOW ACCUMULATIONS THAT MAY
CREATE HAZARDOUS WINTER DRIVING CONDITIONS. CONTINUE TO MONITOR
THE LATEST FORECASTS AT WEATHER.GOV/RENO OR LISTEN TO NOAA
WEATHER RADIO.
$$
HTTP://WEATHER.GOV/RENO

WINTER STORM WATCH
Issue Date: 405 AM PST THU DEC 10 2009
Expiration: 1000 AM PST SUN DEC 13 2009

...SERIES OF WINTER STORMS WILL MOVE THROUGH THE SIERRA NEVADA
TONIGHT THROUGH SUNDAY...
.A SERIES OF PACIFIC STORMS ARE FORECAST TO MOVE THROUGH STARTING
TONIGHT AND CONTINUING INTO SUNDAY. SEVERAL FEET OF SNOW IS
EXPECTED BY LATE SUNDAY ACROSS THE WEST SLOPES OF THE SIERRA
NEVADA. EXACT TIMING OF EACH SYSTEM IS STILL UNCERTAIN AT THIS
TIME...HOWEVER PERIODS OF HEAVY SNOW AND STRONG WIND CAN BE
EXPECTED. THE HEAVIEST SNOW IS LIKELY TO BE ON SATURDAY AND
SATURDAY NIGHT AS THE STRONGEST STORM SYSTEM MOVES THROUGH.
CAZ068-069-102300-
/O.NEW.KSTO.WS.A.0011.091211T0600Z-091213T1800Z/
WESTERN PLUMAS COUNTY/LASSEN PARK-
WEST SLOPE NORTHERN SIERRA NEVADA-
INCLUDING THE CITIES OF...CHESTER...QUINCY...BLUE CANYON
405 AM PST THU DEC 10 2009
...WINTER STORM WATCH IN EFFECT FROM THIS EVENING THROUGH SUNDAY
MORNING...
THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A WINTER
STORM WATCH...WHICH IS IN EFFECT FROM THIS EVENING THROUGH SUNDAY
MORNING FOR WESTERN PLUMAS COUNTY INCLUDING LASSEN PARK AND THE
WEST SLOPES OF THE NORTHERN SIERRA NEVADA.
* TIMING: PERIODS OF HEAVY SNOW EXPECTED STARTING LATE TONIGHT AND
CONTINUING INTO SUNDAY. THE HEAVIEST SNOWFALL IS EXPECTED SATURDAY
AND SATURDAY NIGHT.
* SNOW LEVEL: GENERALLY 3500 TO 4500 FEET IN WESTERN PLUMAS COUNTY
AND LASSEN PARK AND 4500 TO 5500 OVER THE WEST SLOPES OF THE
NORTHERN SIERRA NEVADA.
* MAIN IMPACT: SEVERAL FEET OF SNOW EXPECTED OVER THE WEEKEND.
* OTHER IMPACTS: STRONG SOUTHWEST WIND GUSTS OF 50 TO 70 MPH AT
TIMES OVER HIGHER TERRAIN WILL RESULT IN AREAS OF BLOWING AND
DRIFTING SNOW WITH NEAR ZERO VISIBILITIES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
$$