FNUS76 KSTO 231250
FWSSTO

SPOT FORECAST FOR DONNER STATE PARK VMP...CAL FIRE
NATIONAL WEATHER SERVICE SACRAMENTO CA
550 AM PDT THU SEP 23 2010

FORECAST IS BASED ON IGNITION TIME OF 0930 PDT ON SEPTEMBER 23.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
WARMING AND DRYING TREND BEGINS TODAY AS HIGH PRESSURE BUILDS OVER
THE AREA. THIS TREND SHOULD CONTINUE INTO EARLY NEXT WEEK. WINDS
WILL GENERALLY BE LIGHT AND DIURNALLY DRIVEN. DAILY HUMIDITY TREND
WILL BE SUCH THAT HIGHEST HUMIDITY VALUES WILL BE IN THE EVENING...
THEN DECREASING OVERNIGHT.

.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....70-75.
MIN HUMIDITY........18-23 PERCENT...INCREASING IN THE AFTERNOON.
WIND (20 FT)........
   SLOPE/VALLEY.....LIGHT WINDS BECOMING SOUTHWEST 3 TO 6 MPH IN
                    THE AFTERNOON.
   RIDGETOP.........LIGHT WINDS BECOMING SOUTHWEST 3 TO 7 MPH IN
                    THE AFTERNOON.
MIXING HEIGHT.......LESS THAN 500 FT AGL INCREASING TO 5000 FT AGL
                    IN THE AFTERNOON.
MIXING WINDS........SOUTHWEST 3 TO 7 MPH.

.TONIGHT...

SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....41-46.
MAX HUMIDITY........43-48 PERCENT.
WIND (20 FT)........
   SLOPE/VALLEY.....WEST WINDS 3 TO 6 MPH IN THE EVENING BECOMING
                    LIGHT.
   RIDGETOP.........SOUTHWEST 3 TO 7 MPH.
MIXING HEIGHT.......4500 FT AGL DECREASING TO LESS THAN 500 FT AGL
                    BY LATE EVENING.
MIXING WINDS........SOUTH 3 TO 7 MPH.

.FRIDAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....75-80.
MIN HUMIDITY........12-17 PERCENT.
WIND (20 FT)........
   SLOPE/VALLEY.....LIGHT WINDS BECOMING SOUTHWEST 4 TO 8 MPH IN
                    THE AFTERNOON.
   RIDGETOP.........SOUTH 5 TO 10 MPH.
MIXING HEIGHT.......LESS THAN 500 FT AGL INCREASING TO 6000 FT
                    AGL.
MIXING WINDS........SOUTH 5 TO 10 MPH.


FORECASTER...TGD
REQUESTED BY...ELSA HUCKS
REASON FOR REQUEST...PRESCRIBED
.TAG 20100923.DONNE.01/STO

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