FXUS66 KSTO 281115
AFDSTO

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
330 AM PDT WED OCT 28 2004

.DISCUSSION...
UPPER LOW CURRENTLY APPEARS TO BE CENTERED OVER WESTERN NEVADA WHILE 
SEVERAL VORT MAXES CONTINUE TO ROTATE AROUND IT. MOST WILL HAVE NO 
AFFECT ON CWA WEATHER AS LOW CONTINUES TO SHIFT EASTWARD. ONE NOW 
LOCATED OVER NORTHWEST NEVADA MAY IMPACT CWA TODAY HOWEVER AS IT 
SHIFTS SOUTHWARD IN NORTHERLY FLOW DOWN BACKSIDE OF LOW THROUGH 
WESTERN NEVADA. THIS DISTURBANCE PRODUCING SOME CLOUDINESS OVER 
NORTHWESTERN CALIFORNIA WITH SOME VERY LIGHT SHOWERS SHOWING UP ON 
RADAR. GFS PRECIP FIELD PROBABLY A LITTLE OVERDONE BUT ISOLATED 
LIGHT SHOWERS ARE QUITE POSSIBLE OVER THE SIERRA CASCADE CREST 
TODAY. TEMP DEW POINT SPREADS THROUGHOUT THE CENTRAL VALLEY 2-3 
DEGREES CELSIUS THIS MORNING SO CHANCES OF SIGNIFICANT FOG THIS 
MORNING ARE SLIM. BACKWASH CLOUDINESS SPILLING OVER MOST OF CWA 
TODAY SO PARTLY CLOUDY WORDING LOOKS OKAY FOR AREAS OUTSIDE SIERRA. 

UPPER LEVEL SHORTWAVE NOW APPROACHING PACIFIC NORTHWEST COAST SHOULD 
NUDGE UPPER LOW OVER NEVADA EASTWARD TONIGHT. CLOUDINESS ASSOCIATED 
WITH THE PASSAGE OF THIS SHORTWAVE TONIGHT SHOULD AGAIN KEEP 
WIDESPREAD FOG FROM FORMING IN THE CENTRAL VALLEY BUT MAY NEED TO 
CONSIDER ADDING SOME AREAS OF FOG TO THE SOUTHERN SAC/NORTHERN SAN 
JOAQUIN VALLEYS FOR TONIGHT. FLAT HIGH PRESSURE RIDGE SHIFTING OVER 
SOUTHWEST U.S. ON FRIDAY SHOULD BRING A LITTLE WARMING. SHORTWAVE 
RIDING OVER TOP OF FLAT RIDGE WILL BRING SLIGHT THREAT OF PRECIP TO 
THE FAR NORTHERN ZONES ON SATURDAY WHILE REST OF CWA REMAINS DRY AND 
A LITTLE WARMER. EXTENDED GFS BRINGS NEARLY CLOSE LOW INTO NORTH 
CENTRAL CALIFORNIA BY END OF EXTENDED BUT OTHER LONG RANGE MODELS 
NOT PICKING UP ON THIS FEATURE YET. THEREFORE HAVE KEPT END OF 
EXTENDED DRY FOR NOW. SMITH

&&

.STO WATCHES/WARNINGS/ADVISORIES...NONE.
   
&&  

$$