High Wind Warning 11, NWS Hanford, CA

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
910 PM PST MON DEC 21 2009

.SYNOPSIS...
LOW PRESSURE WILL BEGIN TO AFFECT THE AREA BEGINNING TONIGHT WITH A
CHANCE OF VALLEY RAIN AND MOUNTAIN SNOW TONIGHT AND TUESDAY. THIS
SYSTEM WILL ALSO BRING WITH IT HIGH WINDS IN THE KERN MOUNTAINS AND
DESERTS TUESDAY AFTERNOON AND EVENING. HIGH PRESSURE WILL PREVAIL
BY MIDWEEK WITH THE RETURN OF VALLEY FOG.

&&

.DISCUSSION...
THE POLAR FRONT IS CROSSING THE REGION ATTM AND IS PRODUCING A HEAVY
LINE OF SHOWERS. WINDS ARE GUSTING TO AROUND 25 MPH WITH THIS
LINE AS IT MAKES ITS WAY SOUTH THROUGH THE FORECAST AREA. SNOW
LEVELS HAVE DROPPED VERY SHARPLY BEHIND THE FRONT TO AROUND 5500
FEET WITH DINKEY COMING IN AT AROUND 32 DEGREES AT 5600 FEET.

BOUNDARY IS EXPECTED TO CONTINUE SOUTH THROUGH THE NIGHT AND IS
WELL COVERED BY CURRENT FORECAST. RAINFALL FROM MADERA WAS AROUND
.33 IN THE PAST HOUR AND A HALF. SO LOCALLY HEAVY RAIN IS EXPECTED
WITH THIS FRONT AS IT PASSES SOUTH.

NO CHANGES TO CURRENT FORECAST IS EXPECTED.

.PREV DISCUSSION... /ISSUED 244 PM PST MON DEC 21 2009/

DISCUSSION...STILL A RATHER NON-DESCRIPT PATTERN SEEN IN SAT PIX.
SHOWERS ARE BEGINNING TO BREAK OUT IN THE WARMER SIDE OF THE UPPER
TROF APPROACHING THE CA COAST. MODELS STILL PUSH A SLIDER TYPE
SYSTEM SSE FROM NEAR VANCOUVER ISL TO THE SRN GREAT BASIN TUES
AFTERNOON. THIS WILL PUSH A COLD FRONT THRU CENTRAL CA TONITE WITH
DRYING OCCURRING TUES...EXCEPT FOR A FEW LINGERING MTN SHOWERS.
QPF AMOUNTS WILL BE GENERALLY LIGHT...AND RANGE FROM A FEW
HUNDREDTHS ON THE VALLEY FLOOR TO MAYBE A HALF INCH IN THE
FOOTHILLS. SNOWFALL IN THE SRN SIERRA IS EXPECTED TO REMAIN BELOW
ADVISORY LEVEL...WITH MAYBE JUST SOME ISOLATED 6-8 INCH AMOUNTS
ABOVE 7K. SNOW LEVELS CURRENTLY AT OR ABOVE 8K...BUT WILL LOWER TO
3-4K TUES. AT THIS TIME DO NOT EXPECT SNOW TO HAVE A SIGNIFICANT
IMPACT IN THE SIERRA FOOTHILLS OR ON THE PASSES IN KERN
COUNTY...AS PRECIP WILL BE ISOLATED AND LIGHT TUES BY THE TIME
SNOW LEVELS FALL.

COLD AIR ON THE BACKSIDE OF THE UPPER LOW WILL SHIFT INLAND TUES
AND TUES NITE. THIS COLD AIR CAN BE SEEN IN THE MOTTLED CLOUDS
ALONG AND EAST OF 130W. THUS MUCH COOLER FROM FROM WHAT WE HAVE
HAD THE PAST SEVERAL DAYS. VALLEY MIN TEMPS COULD BE CRITICAL ONCE
AGAIN...BUT NOTHING MORE SEVERE THAN THE MIN TEMPS THAT OCCURRED
EARLIER THIS MONTH. COLDEST READINGS IN THE 26-28 DEG RANGE ARE
POSSIBLE OUTSIDE URBAN AREAS.

A LONGWAVE RIDGE WILL THEN LIE ALONG THE WEST COAST THRU THE REST
OF THE WEEK. THIS WILL BRING A MODEST WARMING TREND TO THE
MOUNTAINS...BUT COLDER AIR IN THE LOWER ELEVATIONS MAY BE TRAPPED
WITH LITTLE DAY TO DAY CHANGES.

THE NEXT CHANCE OF PRECIP COMES IN THE FORM OF SOME KIND OF
UNDERCUTTING SOUTHERN STREAM SHORTWAVE TROF...MAYBE BRING A CHANCE
OF PRECIP AS EARLY AS SUN. BUT GFS AND THE EURO HAVE SIGNIFICANT
DIFFERENCES ON HOW MUCH UNDERCUTTING OCCURS...WITH GFS THE WETTER
FARTHER NORTH SYSTEM. FOR NOW HAVE GONE WITH CLIMO POPS SIMILAR TO
PREVIOUS FCSTS.

&&

.AVIATION...
MVFR CONDITIONS WILL CONTINUE IN THE SAN JOAQUIN VALLEY WITH AREAS
OF IFR IN SHOWERS SPREADING SOUTHWARD THIS EVENING. CONDITIONS WILL
IMPROVE TO VFR AFTER 18Z TUESDAY...EXCEPT ALONG THE EAST SIDE AND
SOUTH END OF THE VALLEY DUE TO RESIDUAL SHOWERS AND LOW CEILINGS.
MOUNTAINS WILL REMAIN MAINLY MVFR WITH AREAS OF IFR IN SNOW/RAIN
THROUGH 06Z WEDNESDAY. KERN DESERTS WILL REMAIN VFR THROUGH 06Z
WEDNESDAY.

&&

.AIR QUALITY ISSUES...
NONE

&&

.HNX WATCHES/WARNINGS/ADVISORIES...
HIGH WIND WATCH FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING
FOR CAZ095-098-099.

FREEZE WATCH FROM TUESDAY EVENING THROUGH WEDNESDAY MORNING FOR
CAZ089>092.

FREEZE WATCH FROM WEDNESDAY EVENING THROUGH THURSDAY MORNING FOR
CAZ089>092.

&&

PUBLIC...JDB
AVN/FW...DS
SYNOPSIS...PJ

WEATHER.GOV/HANFORD

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
346 PM PST MON DEC 21 2009

CAZ095>097-230000-
KERN COUNTY MOUNTAINS-SIERRA NEVADA FROM YOSEMITE TO KINGS CANYON-
TULARE COUNTY MOUNTAINS-
346 PM PST MON DEC 21 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE KERN COUNTY MOUNTAINS
AND THE HIGHER ELEVATIONS OF THE SOUTHERN SIERRA NEVADA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

A HIGH WIND WATCH FOR THE KERN COUNTY MOUNTAINS AND DESERTS
REMAINS IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING.
FOR FURTHER DETAILS PLEASE SEE THE LATEST NON PRECIPITATION
WARNING /WWUS76 KHNX/ OR /SFONPWHNX/.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION WILL NOT BE NEEDED.

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR
UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE.

WEATHER.GOV/HANFORD

CAZ089>092-230000-
WEST CENTRAL SAN JOAQUIN VALLEY-EAST CENTRAL SAN JOAQUIN VALLEY-
SOUTHWESTERN SAN JOAQUIN VALLEY-SOUTHEASTERN SAN JOAQUIN VALLEY-
346 PM PST MON DEC 21 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE CENTRAL AND SOUTHERN
SAN JOAQUIN VALLEY.

.DAY ONE...THIS AFTERNOON AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THE NATIONAL WEATHER SERVICE IN HANFORD HAS ISSUED A FREEZE WATCH
FOR THE CENTRAL AND SOUTHERN SAN JOAQUIN VALLEY...WHICH IS IN
EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY MORNING...AND ALSO
WEDNESDAY EVENING THROUGH THURSDAY MORNING. FOR FURTHER DETAILS
PLEASE SEE THE LATEST NON PRECIPITATION WARNING /WWUS76 KHNX/ OR
/SFONPWHNX/.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION WILL NOT BE NEEDED.

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR
UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE.

WEATHER.GOV/HANFORD

PJ