FXUS66 KSTO 300440
AFDSTO

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
840 PM PST SUN NOV 29 2009

.DISCUSSION...WATER VAPOR IMAGERY SHOWS A STRONG RIDGE OF HIGH 
PRESSURE BUILDING OVER THE WEST COAST THIS EVENING...WITH CLEAR 
SKIES OVER NORTHERN CALIFORNIA.  AS A RESULT...TEMPERATURES WARMED 
MOST LOCATIONS A FEW DEGREES OVER THOSE OF YESTERDAY IN COMBINATION 
WITH A STEADY NORTH WIND.  AREAS FROM SACRAMENTO NORTHWARD RANGED 
ANYWHERE FROM 10 TO 12 DEGREES ABOVE NORMAL TODAY...WHICH WILL MOST 
LIKELY BE THE LAST 70 DEGREE DAY FOR THE SEASON.  MEANWHILE...THE 
NORTHERN SAN JOAQUIN VALLEY DID NOT WARM AS WELL...AS A COOLER START 
THIS MORNING AND LIGHT WINDS LIMITED THERE WARMING POTENTIAL.  AS 
FOR THIS EVENING...TEMPERATURES ARE COOLING RATHER QUICKLY.  THE ONE 
EXCEPTION IS THE NORTHERN SACRAMENTO VALLEY...WHERE DOWNSLOPE 
NORTHERLY WINDS REMAIN.  EXPECT TEMPERATURES TONIGHT TO FALL INTO 
THE 30S AND LOWER 40S TONIGHT.  ALTHOUGH THE CURRENT FORECAST LOOKS 
PRETTY GOOD...AM GOING TO UPDATE TO ADD SOME PATCHY FROST TO THE 
CENTRAL SACRAMENTO VALLEY AND AREAS SOUTHWARD.  MAY ALSO TWEAK 
TEMPERATURES IN A FEW LOCATIONS.  OTHERWISE...EXPECT HIGH PRESSURE 
TO REMAIN OVER THE REGION THIS WEEK...WITH TEMPERATURES NOT WARMING 
QUITE AS MUCH AS TODAY...AS WE LOSE THE ADIABATIC WARMING AID OF THE 
NORTH WINDS.  PALMER 

&&

.AVIATION...VFR CONDITIONS PREDOMINATE ACROSS THE AREA TONIGHT AND 
TOMORROW. PATCHY BR WITH MVFR VIS IS POSSIBLE OVER THE SOUTHERN 
SACRAMENTO VALLEY AND THE NORTHERN SAN JOAQUIN VALLEY AFTER 09Z AND 
CONTINUING TILL AROUND 18-20Z. SOME PATCHY FOG WITH IFR MAY DEVELOP 
SOUTH OF KSCK. LOCAL NORTHEAST TO EAST GUSTS TO 35 MPH POSSIBLE OVER 
RIDGES AND SIERRA CANYONS TONIGHT. LIGHT WINDS OVERNIGHT IN THE 
VALLEY.

&& 

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

&&

$$