HAZARDOUS WEATHER OUTLOOK
Issue Date: 617 PM PST SAT DEC 5 2009
Expiration: 600 AM PST SUN DEC 06 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE VALLEYS OF THE SAN
FRANCISCO BAY AREA AND MONTEREY BAY AREA AS WELL AS THE NORTH BAY
MOUNTAINS
.DAY ONE...SATURDAY NIGHT
MOSTLY CLEAR AND COLD CONDITIONS ARE EXPECTED WITH AREAS OF FROST
DEVELOPING LATE.
.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY
AREAS OF FROST ARE LIKELY EARLY ON SUNDAY MORNING.
A STRONG CANADIAN COLD FRONT WILL USHER IN THE COLDEST AIR OF THE
SEASON SO FAR SUNDAY NIGHT INTO MONDAY. LOWERING SNOW LEVELS ARE
EXPECTED. BY MONDAY MORNING SNOW LEVELS ARE FORECAST TO RANGE FROM
1000 FEET OVER THE NORTH BAY COUNTIES TO 2500 FEET OVER THE
SANTA LUCIAS. SNOW LEVELS ARE EXPECTED TO DROP AS LOW AS 500 FEET
IN HEAVIER SHOWERS. WIDESPREAD FREEZING TEMPERATURES ARE POSSIBLE
LATE MONDAY NIGHT INTO TUESDAY MORNING. A FREEZE WATCH IS IN EFFECT.
* FREEZE WATCH........SEE SFONPWMTR FLUS46 KMTR FOR DETAILS *
A WARMER AND WETTER WEATHER SYSTEM WILL ARRIVE LATE WEDNESDAY OR
WEDNESDAY NIGHT. THIS SYSTEM...AND ONE TO FOLLOW LATER IN THE WEEK
OR NEXT WEEKEND...HAVE THE POTENTIAL OF PRODUCING HEAVY RAIN AND
STRONG GUSTY WINDS. THERE IS STILL A FAIR AMOUNT OF UNCERTAINTY
SURROUNDING THE NATURE OF THESE WEATHER SYSTEMS...BUT THEY BEAR
CLOSE WATCHING.
SPECIAL WEATHER STATEMENT
Issue Date: 533 PM PST SAT DEC 5 2009
Expiration: 600 AM PST SUN DEC 06 2009
...A COLD WEATHER SYSTEM ARRIVES SUNDAY NIGHT AND MONDAY WITH LOWERING
SNOW LEVELS...
...WET AND WARMER WEATHER EXPECTED DURING THE MIDDLE AND END OF
NEXT WEEK...
A STRONG CANADIAN COLD FRONT WILL BRING THE COLDEST AIR OF THE
SEASON SO FAR TO THE BAY AREA AND CENTRAL COAST SUNDAY NIGHT INTO
MONDAY. ALTHOUGH INITIALLY DRY...THE AIRMASS WILL BECOME
INCREASINGLY MOIST AND UNSTABLE. SHOWERS WILL DEVELOP ON SUNDAY
NIGHT...AND CONTINUE INTO MONDAY. SNOW LEVELS WILL DROP SUNDAY
NIGHT INTO MONDAY AS A VERY COLD AIRMASS SETTLES OVER THE AREA. BY
MONDAY MORNING SNOW LEVELS WILL RANGE FROM 1000 FEET OVER THE NORTH
BAY TO 3000 FEET OVER THE CENTRAL COAST. SNOW LEVELS COULD DROP AS
LOW AS 500 FEET IN HEAVIER SHOWERS. SNOW ACCUMULATIONS OF 1 TO 2
INCHES ARE POSSIBLE ABOVE 1500 FEET. AT LOWER ELEVATIONS...COLD
RAIN SHOWERS ARE EXPECTED. IF THE WEATHER SYSTEM PICKS UP MORE
MOISTURE THAN ANTICIPATED...THEN SNOW ACCUMULATIONS IN THE HILLS
COULD BE GREATER.
RAIN AND SNOW SHOWERS WILL TAPER OFF FROM NORTH TO SOUTH LATE
MONDAY. COLD CONDITIONS ARE EXPECTED MONDAY NIGHT...AND
WIDESPREAD FREEZING TEMPERATURES ARE POSSIBLE IN THE
VALLEYS IF CLOUDS CLEAR EARLY THAT NIGHT. A FREEZE WATCH IS IN
EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING FOR THE
VALLEYS OF THE SAN FRANCISCO AND MONTEREY BAY AREAS.
A WARMER AND WETTER WEATHER SYSTEM IS FORECAST TO ARRIVE FROM THE
WEST BY LATE WEDNESDAY OR WEDNESDAY NIGHT. THE MIDWEEK WEATHER
SYSTEM...AND ANOTHER TO FOLLOW LATE IN THE WEEK OR NEXT
WEEKEND...HAVE THE POTENTIAL TO PRODUCE HEAVY RAIN AND STRONG
GUSTY WINDS.
IN SUMMARY...AN ACTIVE WEATHER PATTERN OVER THE NEXT SEVEN DAYS
WILL CREATE POTENTIAL WEATHER HAZARDS INCLUDING SNOW ON HIGHER
ELEVATION ROADWAYS...FREEZING TEMPERATURES...POTENTIALLY HEAVY
RAINFALL...AND STRONG GUSTY WINDS. PLEASE LISTEN TO NOAA WEATHER
RADIO OR VISIT OUR WEBSITE AT: HTTP://WEATHER.GOV/SANFRANCISCO FOR
THE LATEST WEATHER UPDATES.
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