Wind Advisory 1, NWS Hanford, CA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
553 AM PST WED FEB 4 2009

.DISCUSSION...THE APPROACHING PACIFIC STORM SYSTEM IS BRINGING A
CHANGE IN THE DRY AND MILD CONDITIONS ACROSS INTERIOR CENTRAL
CALIFORNIA. INITIAL EFFECTS FROM THE INCREASED SOUTHERLY FLOW
AHEAD OF THE SYSTEM WILL BE GUSTY WINDS THROUGH AND BELOW THE
GRAPEVINE TODAY AND DEVELOPING ALONG THE EXTREME WEST SIDE OF THE
VALLEY BY THIS EVENING. THE MODERATE TO LOCALLY STRONG SOUTHERLY
WINDS WILL CONTINUE INTO LATER TONIGHT. GUSTS NEAR ADVISORY LEVELS
WILL REMAIN CONFINED TO THE LOCALLY WIND PRONE LOCATIONS AND ARE
HANDLED WITH A SPECIAL WEATHER STATEMENT. THE SOUTHERLY FLOW WILL
MAINTAIN WELL ABOVE NORMAL TEMPERATURES OVER THE DISTRICT THIS
AFTERNOON...ESPECIALLY IN THE SOUTH END OF THE VALLEY...WHERE
ADIABATIC WARMING WILL AGAIN PUSH TEMPERATURES TO AROUND RECORD
LEVELS.

THE INITIAL RATHER WARM LOW PRESSURE SYSTEM WILL BEGIN TO MOVE
INLAND OVERNIGHT TONIGHT...SPREADING RAIN AND HIGHER ELEVATION
SNOW ACROSS THE DISTRICT THROUGH THURSDAY NIGHT. SNOW LEVELS WILL
START OUT NEAR 8000 FEET...LOWERING TO AROUND 5000 FEET BY FRIDAY
AS A FOLLOWING COOLER SHORTWAVE TROUGH PUSHES INTO THE REGION.
THIS SYSTEM WILL BRING ADDITIONAL RAIN AND MOUNTAIN SNOW TO THE
DISTRICT BEFORE EXITING SATURDAY. TOTAL SNOW ACCUMULATIONS ARE
EXPECTED TO REMAIN MAINLY BELOW WARNING LEVELS AND ARE BEING
COVERED IN A SPECIAL WEATHER STATEMENT AT THIS TIME.

AS THE UPPER LOW MOVES OVERHEAD...INSTABILITY IS PROGGED TO
INCREASE SUFFICIENTLY FOR A SLIGHT CHANCE OF AFTERNOON AND
EVENING THUNDERSTORMS IN THE VALLEY FRIDAY.

AFTER TODAY...TEMPERATURES WILL LOWER BACK TO AROUND CLIMO...WITH
SEASONABLY COOL AND GENERALLY UNSETTLED CONDITIONS TO CONTINUE
INTO EARLY NEXT WEEK AS MODELS INDICATE A SERIES OF SYSTEMS
SLIDING SOUTHEAST ACROSS THE WESTERN US.

&&

.AVIATION...IN THE CENTRAL AND SOUTH SAN JOAQUIN VALLEY...AREAS
MVFR VISIBILITIES IN HAZE WITH LCL IFR CONDITIONS IN MIST/FOG
DEVELOPING FROM 08Z THROUGH 17Z WEDNESDAY. ELSEWHERE
ACROSS THE CENTRAL CALIFORNIA INTERIOR...VFR CONDITIONS WILL
PREVAIL THROUGH 12Z THURSDAY. ALTHOUGH HIGH LEVEL CLOUDS WILL BE ON
THE INCREASE THIS AFTERNOON AS WELL AS STRONGER SOUTH WINDS
DEVELOPING AS AN UPPER LEVEL LOW APPROACHES THE CENTRAL COAST.

&&

.AIR QUALITY ISSUES...
ON WEDNESDAY FEBRUARY 4 2009... UNHEALTHY FOR SENSITIVE GROUPS IN
FRESNO... KERN... KINGS... MERCED AND TULARE COUNTIES.
FIREPLACE/WOOD STOVE BURNING IS PROHIBITED IN FRESNO... KERN...
KINGS... MADERA... MERCED AND TULARE COUNTIES.
FURTHER INFORMATION IS AVAILABLE AT VALLEYAIR.ORG

&&

.HNX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

PUBLIC...JEB
AVN/FW...MV

WEATHER.GOV/HANFORD

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
623 AM PST WED FEB 4 2009

CAZ089>092-051300-
WEST CENTRAL SAN JOAQUIN VALLEY-EAST CENTRAL SAN JOAQUIN VALLEY-
SOUTHWESTERN SAN JOAQUIN VALLEY-SOUTHEASTERN SAN JOAQUIN VALLEY-
623 AM PST WED FEB 4 2009

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

.DAY ONE...TODAY AND TONIGHT

SOUTHERLY WINDS GUSTING AROUND 45 MPH ARE EXPECTED THIS AFTERNOON
THROUGH AND BELOW THE GRAPEVINE...AND BY THIS EVENING THROUGH
THE PASSES AND HIGHER ELEVATIONS ALONG THE WEST SIDE OF THE
VALLEY. THE WINDS WILL SUBSIDE LATER TONIGHT. PLEASE SEE THE LATEST
SPECIAL WEATHER STATEMENT /WWUS86 KHNX OR SFOSPSHNX/ FOR FURTHER
INFORMATION.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

.SPOTTER INFORMATION STATEMENT...

THERE WILL BE A SLIGHT CHANCE FOR AFTERNOON AND EVENING
THUNDERSTORMS ON FRIDAY. OTHERWISE NO HAZARDOUS WEATHER IS
EXPECTED THROUGH THE PERIOD.

SKYWARN SPOTTER ACTIVATION WILL NOT BE NEEDED.

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

JEB

WEATHER.GOV/HANFORD

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
514 AM PST WED FEB 4 2009

CAZ089>099-042100-
WEST CENTRAL SAN JOAQUIN VALLEY-EAST CENTRAL SAN JOAQUIN VALLEY-
SOUTHWESTERN SAN JOAQUIN VALLEY-SOUTHEASTERN SAN JOAQUIN VALLEY-
MARIPOSA MADERA AND FRESNO COUNTY FOOTHILLS-
TULARE COUNTY FOOTHILLS-KERN COUNTY MOUNTAINS-
SIERRA NEVADA FROM YOSEMITE TO KINGS CANYON-
TULARE COUNTY MOUNTAINS-INDIAN WELLS VALLEY-
SOUTHEASTERN KERN COUNTY DESERT-
514 AM PST WED FEB 4 2009

...WARM AND DRY CONDITIONS COMING TO AN END OVER THE CENTRAL
CALIFORNIA INTERIOR...

A LOW PRESSURE SYSTEM OVER THE NORTHEAST PACIFC OCEAN WILL NEAR THE
CENTRAL CALIFORNIA COAST THIS EVENING...BRINGING A CHANGE IN THE
WEATHER AFTER TODAY.

THE SOUTHERLY FLOW AHEAD OF THIS SYSTEM WILL KEEP GUSTY SOUTH WINDS
BLOWING ALONG INTERSTATE 5 OVER THE GRAPEVINE AND EXTENDING INTO
THE EXTREME SOUTH END OF THE SAN JOAQUIN VALLEY NEAR THE BASE OF THE
GRAPEVINE. WINDS WILL ALSO INCREASE THROUGH THE PASSES AND HIGHER
ELEVATIONS ALONG THE WEST SIDE OF THE VALLEY BY THIS EVENING. SPEEDS OF
15 TO 25 MPH WITH GUSTS UP TO 45 MPH CAN BE EXPECTED IN THESE AREAS
THROUGH LATER TONIGHT.

THE WINDS ARE WARMING AS THEY FUNNEL THROUGH TEJON PASS AND DESCEND
TO THE VALLEY FLOOR. THIS WILL RESULT IN NEAR RECORD TEMPERATURES IN
THE SOUTH END OF THE VALLEY AGAIN TODAY...WITH WELL ABOVE NORMAL
TEMPERATURES THROUGHOUT INTERIOR CENTRAL CALIFORNIA.

THE INITIAL SYSTEM WILL MOVE INLAND LATE TONIGHT INTO THURSDAY
NIGHT...SPREADING RAIN AND HIGHER ELEVATION SNOW ACROSS THE
REGION...WITH SNOW LEVELS REMAINING RELATIVELY HIGH INITIALLY.
A SECONDARY SOMEWHAT COLDER SYSTEM WILL PUSH THROUGH THE REGION
FRIDAY INTO SATURDAY...LOWERING SNOW LEVELS TO ABOUT 5000 FEET.
TOTAL ACCUMULATIONS AROUND 12 TO 18 INCHES ARE POSSIBLE OVER THE
HIGHER ELEVATIONS OF THE SIERRA NEVADA BEFORE PRECIPITATION TAPERS
OFF SATURDAY AS THE SYSTEM EXITS THE REGION. A FEW INCHES OF SNOW
MAY ACCUMULATE OVER THE HIGHER ELEVATIONS OF THE KERN COUNTY
MOUNTAINS...BUT SNOW IS EXPECTED TO REMAIN ABOVE PASS LEVELS.

AS THE UPPER LEVEL LOW TRACKS ACROSS THE AREA FRIDAY...THE
ATMOSPHERE WILL BECOME MORE UNSTABLE. THIS WILL BRING A SLIGHT
CHANCE OF THUNDERSTORMS TO THE VALLEY FRIDAY AFTERNOON AND
EVENING...WITH HEAVY RAIN...GUSTY WINDS AND SMALL HAIL POSSIBLE.

THE COOLER AIR AND CLOUDS AND RAIN ACCOMPANYING THE SYSTEMS WILL
RETURN SEASONABLY COOL TEMPERATURES TO THE REGION BEGINNING
THURSDAY. ADDITIONAL PASSING DISTURBANCES SHOULD MAINTAIN THE
RELATIVELY COOL AND UNSETTLED CONDITIONS THROUGH EARLY NEXT WEEK.

LISTEN TO NOAA WEATHER RADIO...OR YOUR FAVORITE NEWS SOURCE...FOR
UPDATES ON THIS SITUATION.

JEB

WEATHER.GOV/HANFORD