FNUS76 KSTO 241230
FWSSTO

SPOT FORECAST FOR DONNER STATE PARK VMP...CAL FIRE
NATIONAL WEATHER SERVICE SACRAMENTO CA
530 AM PDT FRI SEP 24 2010

FORECAST IS BASED ON IGNITION TIME OF 0900 PDT ON SEPTEMBER 24.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
WARMING AND DRYING TREND CONTINUES TODAY AND THE NEXT SEVERAL DAYS
AS HIGH PRESSURE BUILDS OVER THE AREA. DAYTIME RH IN THE TEENS
THE NEXT FEW DAYS WITH LOWEST VALUES MID MORNING BEFORE INCREASING
IN THE AFTERNOON. EXPECT POOR TO MODERATE HUMIDITY RECOVERIES TO
CONTINUE. THE RIDGE WILL CONTINUE TO BUILD INTO EARLY NEXT WEEK.
WIND PATTERN WILL GENERALLY BE RELATIVELY LIGHT AND DIURNALLY
DRIVEN.

.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....75-80.
MIN HUMIDITY........12-17 PERCENT...INCREASING IN THE AFTERNOON.
WIND (20 FT)........
   SLOPE/VALLEY.....LIGHT WINDS BECOMING SOUTHWEST 3 TO 7 MPH IN
                    THE AFTERNOON.
   RIDGETOP.........SOUTH 4 TO 8 MPH.
MIXING HEIGHT.......LESS THAN 500 FT AGL INCREASING TO 6000 FT AGL
                    BY LATE MORNING.
MIXING WINDS........SOUTH 4 TO 8 MPH.

.TONIGHT...

SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....44-49.
MAX HUMIDITY........33-38 PERCENT...DECREASING AFTER MIDNIGHT.
WIND (20 FT)........
   SLOPE/VALLEY.....SOUTHWEST WINDS 2 TO 5 MPH SHIFTING TO THE EAST
                    3 TO 6 MPH BY LATE EVENING.
   RIDGETOP.........SOUTHWEST 3 TO 6 MPH.
MIXING HEIGHT.......6000 FT AGL DECREASING TO LESS THAN 500 FT AGL
                    BY LATE EVENING.
MIXING WINDS........SOUTHWEST 3 TO 7 MPH.

.SATURDAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....79-84.
MIN HUMIDITY........11-16 PERCENT...INCREASING IN THE AFTERNOON.
WIND (20 FT)........
   SLOPE/VALLEY.....LIGHT WINDS BECOMING SOUTH 4 TO 9 MPH IN THE
                    AFTERNOON.
   RIDGETOP.........SOUTH 6 TO 11 MPH.
MIXING HEIGHT.......LESS THAN 500 FT AGL INCREASING TO 6500 FT AGL
                    IN THE AFTERNOON.
MIXING WINDS........SOUTH 6 TO 12 MPH.


FORECASTER...TGD
REQUESTED BY...ELSA HUCKS
REASON FOR REQUEST...PRESCRIBED
.TAG 20100924.DONNE.01/STO

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