HAZARDOUS WEATHER OUTLOOK
Issue Date: 619 PM PST SAT DEC 05 2009
Expiration: 600 AM PST SUN DEC 06 2009 Expires:200912061400;;
FLUS46 KMTR 060217
HWOMTR
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
617 PM PST SAT DEC 5 2009
CAZ006-505-508-509-511-512-517-518-529-530-PZZ530-061400-
SAN FRANCISCO-
COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE-
SAN FRANCISCO BAY SHORELINE-SAN FRANCISCO PENINSULA COAST-
EAST BAY HILLS AND DIABLO RANGE-SANTA CRUZ MOUNTAINS-
SANTA LUCIA MOUNTAINS AND LOS PADRES NATIONAL FOREST-
MOUNTAINS OF SAN BENITO AND INTERIOR MONTEREY COUNTY INCLUDING
PINNACLES NATIONAL MONUMENT-NORTHERN MONTEREY BAY-
SOUTHERN MONTEREY BAY AND BIG SUR COAST-
SAN FRANCISCO/SAN PABLO/SUISUN BAYS AND THE WEST DELTA-
617 PM PST SAT DEC 5 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR COASTAL AND BAYSIDE SECTIONS
OF THE SAN FRANCISCO AND MONTEREY BAY AREAS. THE OUTLOOK IS ALSO
FOR ALL MOUNTAINOUS AREAS EXCEPT THE NORTH BAY MOUNTAINS.
.DAY ONE...SATURDAY NIGHT
MOSTLY CLEAR AND COOL CONDITIONS ARE EXPECTED.
.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY
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
CENTRAL COAST. SNOW LEVELS ARE EXPECTED TO DROP AS LOW AS 500 FEET
IN HEAVIER SHOWERS. AREAS OF FROST ARE POSSIBLE LATE MONDAY NIGHT
INTO TUESDAY MORNING.
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.
.SPOTTER INFORMATION STATEMENT...
WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS PER STANDARD OPERATING PROCEDURES.
$$
SPECIAL WEATHER STATEMENT
Issue Date: 533 PM PST SAT DEC 05 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.
$$
CANEPA/DYKEMA
FREEZE WATCH
Issue Date: 201 PM PST SAT DEC 05 2009
Expiration: 900 AM PST TUE DEC 08 2009 ...FREEZE WATCH IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY
MORNING...
THE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA HAS ISSUED
A FREEZE WATCH...WHICH IS IN EFFECT FROM LATE MONDAY NIGHT
THROUGH TUESDAY MORNING.
A VERY COLD AIR MASS WILL MOVE OUT OF CANADA AND INTO THE SAN
FRANCISCO AND MONTEREY BAY AREAS BY MONDAY NIGHT CAUSING
TEMPERATURES TO PLUMMET TUESDAY MORNING. AS THE SKY COVER
DECREASES THROUGH THE NIGHT...TEMPERATURES ARE EXPECTED TO FALL
BELOW FREEZING FOR SEVERAL HOURS. MOST AREAS WILL EXPERIENCE
TEMPERATURES IN THE MID TO UPPER 20S FOR A FEW HOURS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FREEZE WATCH MEANS SUB-FREEZING TEMPERATURES ARE POSSIBLE. THESE
CONDITIONS COULD KILL CROPS AND OTHER SENSITIVE VEGETATION. IF THE
FREEZING CONDITIONS DEVELOP...BE PREPARED TO COVER PLANTS...IF
POSSIBLE...WITH CLOTH SHEETS OR BLANKETS TO PROTECT THEM FROM
FREEZING. FOR ANYONE OR ANYTHING SENSITIVE TO COLD...INCLUDING
PETS...PROPER SHELTER SHOULD BE PROVIDED.
$$
EVANS
WEATHER.GOV/SANFRANCISCO
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