FXUS66 KHNX 252236
AFDHNX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
236 PM PST WED NOV 25 2009

.SYNOPSIS...
THANKSGIVING DAY IN THE CENTRAL CALIFORNIA INTERIOR WILL BE DRY 
AS A HIGH PRESSURE RIDGE REMAINS OVER THE WESTERN U.S. PATCHY
MORNING FOG WILL CONTINUE TO BE A CONCERN FOR THE SAN JOAQUIN
VALLEY. A LOW PRESSURE TROUGH WILL MOVE ACROSS THE THE AREA ON
FRIDAY BRINGING INCREASING A CHANCE OF LIGHT PRECIPITATION FRIDAY
NIGHT.

&&

.DISCUSSION...SUNNY SKIES AND ABOVE NORMAL TEMPERATURES PREVAIL
TODAY AS HIGH PRESSURE REMAINS IN CONTROL OVER THE WEST. 24HR
TRENDS SHOW AS MUCH AS 5 DEGREES WARMING ACROSS THE VALLEY FROM 
YESTERDAY. AFTER SOME PATCHY MORNING VALLEY FOG...THANKSGIVING
DAY IS SHAPING UP TO BE QUITE NICE WITH LOTS OF SUNSHINE AND EVEN
JUST A BIT WARMER THAN TODAY. MODELS HAVE COME INTO BETTER AGREEMENT
WITH THE TRACK OF THE INCOMING EPAC TROUGH. THE CONSENSUS NOW IS
TO BRING IT INLAND OVER THE PACNW THURSDAY NIGHT AND INTO CENTRAL
CA LATE FRIDAY AFTERNOON. 12Z NAM AND GFS SPLIT THE SOUTHERN END
OF THE TROUGH INTO A CLOSED LOW OVER THE DISTRICT FRIDAY NIGHT.
00Z ECMWF WAS IN LINE AS WELL THOUGH THE 12Z RUN HAS NOW COME IN
MORE PROGRESSIVE...NOT CLOSING IT OFF UNTIL SATURDAY OVER SOCAL.
MOISTURE IS NOT IMPRESSIVE WITH THIS SYSTEM BUT ENOUGH IS PROGGED
TO ADD SLIGHT CHANCE IN FOR THE VALLEY FRIDAY NIGHT WITH A BETTER
CHANCE ACROSS THE MOUNTAINS. MUCH COOLER CONDITIONS WILL ARRIVE
FRIDAY NIGHT AND SNOW LEVELS MAY FALL TO AROUND 5000 FEET BY EARLY
SATURDAY MORNING. HOWEVER...EXPECT THIS TO BE A LOW POP LOW QPF
EVENT. KEPT SOME SLIGHT TO LOW CHANCE POPS IN FOR THE MOUNTAINS 
ON SATURDAY WITH SOME LINGERING UPSLOPE SHOWERS. TEMPERATURES WILL
FALL SEVERAL DEGREES TO NEAR SEASONAL NORMS ON SATURDAY. SURFACE
HIGH BUILDING OVER THE GREAT BASIN WILL CREATE A TIGHTENING
NORTHEAST PRESSURE GRADIENT OVER THE SIERRA AROUND YOSEMITE. THIS
ALONG WITH A ~100KT UPPER JET COULD LEAD TO SOME BREEZY TO LOCALLY
WINDY CONDITIONS IN THE SIERRA LATE SATURDAY INTO EARLY SUNDAY.
HIGH PRESSURE BUILDS IN FROM THE EPAC EARLY NEXT WEEK FOR DRY AND
WARMER CONDITIONS...BACK TO A LITTLE ABOVE CLIMO.

&&

.AVIATION...
AREAS OF MVFR VISIBILITIES IN HAZE IN THE SAN JOAQUIN VALLEY WILL 
PERSIST UNTIL 00Z FRIDAY WITH LOCAL IFR DUE TO FOG BETWEEN 08Z AND 
15Z THURSDAY. VFR CONDITIONS CAN BE EXPECTED ELSEWHERE ACROSS THE 
CENTRAL CALIFORNIA INTERIOR THROUGH 00Z FRIDAY.

&&

.AIR QUALITY ISSUES...
ON WEDNESDAY NOVEMBER 25 2009... UNHEALTHY FOR SENSITIVE GROUPS IN
FRESNO AND KERN COUNTIES.  FIREPLACE/WOOD STOVE BURNING IS
PROHIBITED IN FRESNO... KERN... KINGS... MADERA AND MERCED
COUNTIES.
FURTHER INFORMATION IS AVAILABLE AT VALLEYAIR.ORG

&&

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

$$

PUBLIC...DCH
AVN/FW...BEAN

WEATHER.GOV/HANFORD