FNUS76 KSTO 230111
FWSSTO

SPOT FORECAST FOR SILVERTHORNE PILES...CA-SHF, SHASTA LAKE
NATIONAL WEATHER SERVICE SACRAMENTO CA
511 PM PST SUN NOV 22 2009

#405-09

FORECAST IS BASED ON IGNITION TIME OF 0955 PST ON NOVEMBER 23.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
UPPER LEVEL HIGH PRESSURE WILL BUILD OVER THE BURN SITE FOR THE NEXT
COUPLE OF DAYS WITH MILD AND DRY WEATHER. SURFACE HIGH PRESSURE WILL
BE LOCATED OVER THE GREAT BASIN CAUSING DRYING NORTH TO NORTHEAST
WINDS OVER THE BURN SITE. SATELLITE IMAGE OVER THE BURN SITE
SUGGESTED A FAVORABLE ORIENTATION WHERE BRISK NORTHEAST TO EAST
WINDS MAY BE FUNNELED ACROSS THE NEARBY BRANCH OR ARM OF SHASTA
LAKE AND OVER THE BURN SITE AT TIMES ON MONDAY. PRESSURE GRADIENTS
AND WINDS ARE FORECAST TO BE A WEAKER OR LIGHTER ON TUESDAY.

.TODAY /MONDAY/...

SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....60-62.
MIN HUMIDITY........22-28 PERCENT.
WIND (20 FT)........
   SLOPE/VALLEY.....NORTH WINDS 7 TO 14 MPH WITH GUSTS TO 20 MPH.
   RIDGETOP.........NORTH TO NORTHEAST 15 TO 25 MPH.
MIXING HEIGHT.......RISING TO 1500 FT AGL.
MIXING WINDS........NORTH 5 TO 10 MPH IN THE MORNING...AND NORTH
                    10 TO 15 MPH IN THE AFTERNOON.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....40-45.
MAX HUMIDITY........60-67 PERCENT.
WIND (20 FT)........
   SLOPE/VALLEY.....DECREASING NORTH WINDS 5 TO 10 MPH DURING THE
                    EVENING.
   RIDGETOP.........NORTH TO NORTHEAST 15 TO 25 MPH IN THE EVENING
                    DECREASING TO 15 TO 20 MPH LATE.
MIXING HEIGHT.......LOWERING TO NEAR GROUND LEVEL.
MIXING WINDS........NORTH 5 TO 10 MPH.

.TUESDAY...

SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....67-69.
MIN HUMIDITY........25-30 PERCENT.
WIND (20 FT)........
   SLOPE/VALLEY.....NORTH 5 TO 10 MPH.
   RIDGETOP.........NORTH TO NORTHEAST 15 TO 20 MPH DECREASING TO
                    7 TO 15 MPH LATER IN THE AFTERNOON.
MIXING HEIGHT.......RISING TO 1000 TO 1500 FT AGL.
MIXING WINDS........NORTH 6 TO 12 MPH.


FORECASTER...JHM
REQUESTED BY...SCOTT LUCAS
REASON FOR REQUEST...PRESCRIBED
.TAG 20091123.SILVE.01/STO

$$