Wind Advisory 30, NWS Sacramento, CA

832 
WWUS76 KSTO 051058
NPWSTO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SACRAMENTO CA
258 AM PST MON DEC 5 2011


CAZ018-052000-
/O.CAN.KSTO.WI.Y.0030.000000T0000Z-111206T0000Z/
/O.NEW.KSTO.FZ.W.0003.111206T0800Z-111206T1700Z/
CARQUINEZ STRAIT AND DELTA-
258 AM PST MON DEC 5 2011

...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST
TUESDAY...
...WIND ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A FREEZE
WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST
TUESDAY. THE WIND ADVISORY HAS BEEN CANCELLED. 

A COLD DRY AIR MASS OVER THE INTERIOR COMBINED WITH CLEAR SKIES AND
LIGHT WINDS TONIGHT WILL ALLOW TEMPERATURES TO RAPIDLY COOL
TONIGHT TO BELOW FREEZING FOR MOST LOCATIONS.

* TEMPERATURES: LOWS BY MONDAY MORNING WILL MAINLY BE IN THE UPPER
  20S FOR MOST LOCATIONS. DURATIONS AT OR BELOW FREEZING WILL BE FOR
  6 TO 12 HOURS WITH TEMPERATURES AT OR BELOW 28 DEGREES FOR 2 TO
  4 HOURS FOR SOME OF THE COLDER RURAL AREAS.

* TIMING: FROM MIDNIGHT TONIGHT THROUGH 9 AM TUESDAY MORNING.

* LOCATIONS INCLUDE: FAIRFIELD...DELTA ISLANDS.

* IMPACTS: PEOPLE SHOULD TAKE MEASURES TO PROTECT FROST SENSITIVE
  PLANTS. MAKE SURE PETS AND OTHER ANIMALS HAVE SHELTER FROM THE
  COLD TEMPERATURES. OUTDOOR WATER PIPES SHOULD BE
  WRAPPED...DRAINED...OR ALLOWED TO DRIP SLOWLY.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS CAN KILL OR DAMAGE CROPS AND OTHER
SENSITIVE VEGETATION.

&&

$$

CAZ015>017-019-052000-
/O.NEW.KSTO.FZ.W.0003.111206T0800Z-111206T1700Z/
NORTHERN SACRAMENTO VALLEY-CENTRAL SACRAMENTO VALLEY-
SOUTHERN SACRAMENTO VALLEY-NORTHERN SAN JOAQUIN VALLEY-
INCLUDING THE CITIES OF...REDDING...CHICO...STOCKTON...MODESTO
258 AM PST MON DEC 5 2011

...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST
TUESDAY...

THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A FREEZE
WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST
TUESDAY FOR THE CENTRAL VALLEY.

A COLD DRY AIR MASS OVER THE INTERIOR COMBINED WITH CLEAR SKIES AND
LIGHT WINDS TONIGHT WILL ALLOW TEMPERATURES TO RAPIDLY COOL
TONIGHT TO BELOW FREEZING FOR MOST LOCATIONS.

* TEMPERATURES: LOWS BY MONDAY MORNING WILL RANGE FROM NEAR 28
  DEGREES IN THE COLDEST RURAL LOCATIONS TO NEAR 32 DEGREES IN
  DOWNTOWN SACRAMENTO. DURATIONS AT OR BELOW FREEZING WILL BE FOR 6
  TO 12 HOURS WITH TEMPERATURES AT OR BELOW 28 DEGREES FOR 2 TO 4
  HOURS FOR SOME OF THE COLDER RURAL AREAS.

* TIMING: FROM MIDNIGHT TONIGHT THROUGH 9 AM TUESDAY MORNING.

* LOCATIONS INCLUDE:
  STOCKTON...MODESTO...DAVIS...LINCOLN...MARYSVILLE...CHICO...REDDING

* IMPACTS: PEOPLE SHOULD TAKE MEASURES TO PROTECT FROST SENSITIVE
  PLANTS. MAKE SURE PETS AND OTHER ANIMALS HAVE SHELTER FROM THE
  COLD TEMPERATURES. OUTDOOR WATER PIPES SHOULD BE
  WRAPPED...DRAINED...OR ALLOWED TO DRIP SLOWLY.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS CAN KILL OR DAMAGE CROPS AND OTHER
SENSITIVE VEGETATION.

&&

$$

CAZ063-064-052000-
/O.EXT.KSTO.WI.Y.0030.000000T0000Z-111205T2000Z/
MOUNTAINS SOUTHWESTERN SHASTA COUNTY TO NORTHERN LAKE COUNTY-
CLEAR LAKE/SOUTHERN LAKE COUNTY-
INCLUDING THE CITIES OF...ALDER SPRINGS...LAKEPORT
258 AM PST MON DEC 5 2011

...WIND ADVISORY NOW IN EFFECT UNTIL NOON PST TODAY FOR WIND GUSTS...

THE WIND ADVISORY IS NOW IN EFFECT UNTIL NOON PST TODAY FOR WIND
GUSTS FROM SOUTHWESTERN SHASTA COUNTY THROUGH SOUTHERN LAKE COUNTY.

* WINDS:NORTHEAST WIND GUSTS UP TO 50 MPH ACROSS RIDGES...THROUGH
  AND BELOW CANYONS AND PASSES.

* TIMING: WINDS WILL DECREASE LATER THIS MORNING. THE STRONGEST
  WINDS ARE OCCURRING NOW IN THE EARLY MORNING HOURS.

* LOCATIONS INCLUDE: HIGHER PASSES ALONG HIGHWAYS 36 AND 20. 
  EXPOSED AREAS IN THE MENDOCINO FOREST. THE HILLS SURROUNDING 
  CLEAR LAKE.

* IMPACTS: GUSTY WINDS WILL MAKE DRIVING DIFFICULT IN HIGH PROFILE
  VEHICLES. SOME BLOWING OF DEBRIS IS POSSIBLE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT WIND GUSTS UP TO 50 MPH ARE EXPECTED.
WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH
PROFILE VEHICLES. USE EXTRA CAUTION.

&&

$$

606 
WWUS76 KSTO 051946
NPWSTO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SACRAMENTO CA
1146 AM PST MON DEC 5 2011

CAZ063-064-052100-
/O.CAN.KSTO.WI.Y.0030.000000T0000Z-111205T2000Z/
MOUNTAINS SOUTHWESTERN SHASTA COUNTY TO NORTHERN LAKE COUNTY-
CLEAR LAKE/SOUTHERN LAKE COUNTY-
INCLUDING THE CITIES OF...ALDER SPRINGS...LAKEPORT
1146 AM PST MON DEC 5 2011

...WIND ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS CANCELLED THE WIND
ADVISORY. 

WINDS OVER THE COASTAL MOUNTAINS HAVE DECREASED AND WILL DIMINISH
FURTHER THROUGH THE DAY. SOME LOCAL GUSTS UP TO 30 TO 40 MPH ARE
STILL POSSIBLE OVER HIGHER PEAKS INTO THE EARLY AFTERNOON.

$$

CAZ015>019-060400-
/O.CON.KSTO.FZ.W.0003.111206T0800Z-111206T1700Z/
NORTHERN SACRAMENTO VALLEY-CENTRAL SACRAMENTO VALLEY-
SOUTHERN SACRAMENTO VALLEY-CARQUINEZ STRAIT AND DELTA-
NORTHERN SAN JOAQUIN VALLEY-
INCLUDING THE CITIES OF...REDDING...CHICO...STOCKTON...MODESTO
1146 AM PST MON DEC 5 2011

...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM
PST TUESDAY...

A FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM
PST TUESDAY. 

A COLD DRY AIR MASS OVER THE INTERIOR COMBINED WITH CLEAR SKIES
AND LIGHT WINDS TONIGHT WILL ALLOW TEMPERATURES TO RAPIDLY COOL
TONIGHT TO BELOW FREEZING FOR MOST LOCATIONS.

* TEMPERATURES: LOWS BY MONDAY MORNING WILL RANGE FROM NEAR 28 
  DEGREES IN THE COLDEST RURAL LOCATIONS TO NEAR 32 DEGREES IN 
  DOWNTOWN SACRAMENTO. DURATIONS AT OR BELOW FREEZING WILL BE 
  FOR6 TO 12 HOURS WITH TEMPERATURES AT OR BELOW 28 DEGREES FOR 
  2 TO 4 HOURS FOR SOME OF THE COLDER RURAL AREAS. 

* TIMING: FROM MIDNIGHT TONIGHT THROUGH 9 AM TUESDAY MORNING.

* LOCATIONS INCLUDE: STOCKTON...MODESTO...CHICO...REDDING

* IMPACTS: PEOPLE SHOULD TAKE MEASURES TO PROTECT FROST 
  SENSITIVE PLANTS. MAKE SURE PETS AND OTHER ANIMALS HAVE 
  SHELTER FROM THE COLD TEMPERATURES. OUTDOOR WATER PIPES 
  SHOULD BE WRAPPED... DRAINED...OR ALLOWED TO DRIP SLOWLY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS CAN KILL OR DAMAGE CROPS AND
OTHER SENSITIVE VEGETATION.

&&

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
959 AM PST SUN DEC 4 2011

.SHORT TERM DISCUSSION...

OUR NORTH TO NORTHEAST WIND PATTERN WILL RAMP UP AGAIN TONIGHT AND
MONDAY MORNING. CHILLY TEMPERATURES AND LIGHTER WIND WILL FOLLOW
THROUGH THE MIDDLE OF THE WEEK.

THERE IS A VERY STRONG UPPER RIDGE (+3 STANDARD DEVIATIONS ABOVE
NORMAL FOR 500MB HEIGHTS) OVER THE EASTERN PACIFIC AND A
CONSEQUENTLY STRONG POLAR JETSTREAM THAT IS DRIVING COLD CANADIAN
AIR INTO THE GREAT BASIN AND INTERMOUNTAIN WEST. ANOTHER SUCH SHOT
OF COLD AIR DIVES INTO NEVADA / UTAH TONIGHT. THE MODELS HAVE
STRUGGLED A BIT WITH HOW FAR WEST THE COLD AIR WILL BE...AND WHERE
THE JET WILL BE POSITIONED LATER TONIGHT. THIS IN TURN HAS A BIG
IMPACT ON HOW MUCH WIND WE GET HERE IN NORTHERN CALIFORNIA.

AFTER A CHILLY START TO THE MORNING (27 AT MATHER...28 AT
STOCKTON...31 AT BEALE AFB AND 35 DOWNTOWN SAC) TEMPERATURES WILL
WARM BACK INTO THE MID 50S TODAY. THERE WON'T BE MUCH WIND TODAY
SO A VERY NICE DAY IS ON TAP ACROSS THE REGION. USING A COMPROMISE
OF THE GFS/NAM/EC REGARDING THE PLACEMENT OF THE SHORT WAVE
TONIGHT...THE UPPER JET STILL LOOKS TO HAVE MORE IMPACT ON THE
SIERRA AND LESS ON THE INTERIOR COASTAL MOUNTAINS OF LAKE COUNTY
AND THE MENDOCINO NF THAN THE LAST SYSTEM. THE 110KT JET WILL BE
AIMED SOMEWHERE SOUTH OF THE HIGHWAY 50 / 395 CROSSING TONIGHT.

THE NAM-12 HAS 50KTS OF WIND AT 850 MB ALONG THE WEST SLOPE OF THE
SIERRA TONIGHT AND A TIGHT PRESSURE GRADIENT WILL ALSO BE IN
PLACE. WE SHOULD SEE SOME GUSTS OVER 60 MPH ALONG THE WEST SLOPES
TONIGHT / EARLY MONDAY. THIS WILL COMBINE WITH HUMIDITY UNDER 10
PERCENT TO CREATE CRITICAL FIRE WEATHER CONDITIONS. WHILE GRASSES
ARE GREEN...LARGER BRUSH AND TIMBER IS QUITE DRY AND ANY FIRES
THAT GET INTO THE TREES COULD SPREAD RAPIDLY IN THE STRONG WIND.

WE WILL ISSUE THE RED FLAG WARNING FOR THIS AREA...BUT NOT FOR THE
MENDOCINO / SOUTHERN LAKE COUNTY MOUNTAINS BECAUSE OF THE
PLACEMENT OF THE JET. THESE AREAS WILL BE BREEZY AS WELL BUT NOT
AS WINDY AS YESTERDAY. WE'LL PROBABLY ISSUE A WIND ADVISORY FOR
THESE LOCATIONS.

THE VALLEYS WILL BE TRICKY TO FORECAST FOR. A COLD 1046MB SURFACE HIGH
SETTLES INTO IDAHO AND STRONG MID LEVEL FORCING WILL PROBABLY LEAD
TO THE DEVELOPMENT OF A BARRIER JET (GUSTY NORTH WINDS ABOUT 1000
FEET OFF THE GROUND) ALONG THE WEST SIDE OF THE VALLEY. OUR LOCAL
WRF SHOWS WINDS INCREASING TO 15 TO 25 MPH WITH GUSTS OVER 35 AT
PLACES LIKE VACAVILLE...FAIRFIELD AND DAVIS. REDDING AND RED BLUFF
MAY ALSO GET BREEZY. BUT EAST OF THIS CORE OF WIND...INVERSIONS
WILL DEVELOP AND IT WILL BE QUITE CHILLY OVERNIGHT. PLACES LIKE
FOLSOM...ELK GROVE...MATHER...RANCHO MURIETTA...LODI AND STOCKTON
/ MODESTO COULD DROP INTO THE UPPER 20S WITH AREAS OF FROST. THIS
WILL MAKE IT CHALLENGING TO ISSUE ANY SORT OF WIND ADVISORY GIVEN
THE CONTRAST OF CONDITIONS THROUGHOUT THE FORECAST ZONES. WE WILL
PROBABLY NEED TO LIMIT ANY WIND ADVISORIES TO THE DELTA. WILL FURTHER
EVALUATE THIS FOR THE AFTERNOON PACKAGE.

MONDAY WILL START WINDY IN THE MOUNTAINS AND ALONG THE WEST SIDE
OF THE VALLEY...AND CHILLY WITH PATCHY FROST ALONG THE EASTERN
VALLEYS. WINDS DECREASE BY AFTERNOON WITH HIGHS IN THE LOWER TO
MID 50S. MONDAY NIGHT HAS A BETTER CHANCE OF MORE WIDE SPREAD
FROST WITH LESS WIND REGION-WIDE. TEMPERATURES ON TUESDAY WILL
PROBABLY ONLY MAKE IT INTO THE MID 40S...WITH ANOTHER CHILLY NIGHT IS
ON TAP TUESDAY NIGHT. SG

.EXTENDED DISCUSSION (THURSDAY THROUGH SUNDAY)

NO SIGNIFICANT CHANGES TO EXTENDED FORECAST. HIGH AMPLITUDE
RIDGING CONTINUES WEDNESDAY NIGHT THEN WEAKENS ON THURSDAY WHEN
MODELS INDICATE A WEAK LOW SLIDING DOWN INTO CALIFORNIA. NOT MUCH
MOISTURE ASSOCIATED WITH THIS WEAK 'INSIDE SLIDER' SO HAVE KEPT
THE FORECAST DRY WITH SEASONAL TEMPERATURES. WINDS SHOULD BE
FAIRLY LIGHT THROUGH THE PERIOD EXCEPT FOR BREEZY DOWNSLOPE FLOW
ALONG THE WESTERN SIERRA OVERNIGHT/EARLY MORNING.  JBB

&&

.AVIATION...

VFR CONDITIONS WITH NORTH SURFACE WINDS UP TO 10 KTS EXPECTED
TODAY. A 110 KT NE TO SW ORIENTED JETSTREAM WILL MOVE FROM NEVADA
INTO THE SIERRA TONIGHT. GUSTY N SURFACE WINDS DEVELOP ALONG THE
WEST SIDE OF THE SACRAMENTO VALLEY AFTER MIDNIGHT 36015G35KT.
WINDS WILL BE STRONGEST 1000 TO 2000 FEET AGL. THESE WINDS COULD
MIX DOWN TO KRDD...KSMF AND KSAC TONIGHT. LLWS IS POSSIBLE AT ALL
TERMINAL SITES OVERNIGHT. GUSTY WINDS WILL CONTINUE UNTIL 1200 LST
THEN DECREASE TOWARD AFTERNOON. IN THE SIERRA NE GUSTS OVER 55KTS
WILL CREATE STRONG TURBULENCE W OF THE CREST TONIGHT AND MONDAY. SG

&&

.STO WATCHES/WARNINGS/ADVISORIES...
RED FLAG WARNING FROM 10 PM THIS EVENING TO 10 PM PST MONDAY
WEST SLOPE NORTHERN SIERRA NEVADA.

FIRE WEATHER WATCH FROM THIS EVENING THROUGH MONDAY EVENING
CLEAR LAKE/SOUTHERN LAKE COUNTY...MOUNTAINS SOUTHWESTERN SHASTA
COUNTY TO NORTHERN LAKE COUNTY.

&&