FNUS76 KSTO 282335
FWSSTO

SPOT FORECAST FOR PLACERVILLE TRAINING FIRE...ELDORADO NF
NATIONAL WEATHER SERVICE SACRAMENTO CA
435 PM PDT THU MAY 28 2009

FORECAST IS BASED ON IGNITION TIME OF 1540 PDT ON MAY 28.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...UPPER LEVEL RIDGE OVER THE GREAT BASIN CIRCULATING
UP MOISTURE AND INSTABILITY FROM THE SOUTH. THIS IS BRINGING
INCREASED MOISTURE AND INSTABILITY TO THE AREA WHICH HAS RESULTED
IN AFTERNOON AND EVENING THUNDERSTORMS. THIS PATTERN WILL CONTINUE
THROUGH THE COMING WEEKEND. GENERALLY LIGHT TERRAIN DRIVEN WINDS
CAN BE EXPECTED EXCEPT IN VICINITY OF THUNDERSTORMS WITH SLIGHTLY
COOLER TEMPS AND HIGHER RH OVER THE NEXT COUPLE OF DAYS.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING MOSTLY CLEAR AFTER 2200.
                    SCATTERED SHOWERS AND THUNDERSTORMS IN THE
                    EVENING.
MIN TEMPERATURE.....AROUND 60 TO 64.
MAX HUMIDITY........60 TO 65 PERCENT.
WIND (20 FT)........
   SLOPE/VALLEY.....LIGHT UPSLOPE WINDS TO 4 MPH BECOMING
                    DOWNSLOPE AFTER SUNSET EXCEPT STRONG AND GUSTY
                    IN VICINITY OF THUNDERSTORMS.
   RIDGETOP.........SOUTH TO 5 MPH BECOMING NORTHEAST AFTER SUNSET
                    EXCEPT STRONG AND GUSTY IN VICINITY OF THUNDERSTORMS.
CWR.................20 PERCENT IN THE EVENING THEN LESS THAN 10
                    PERCENT.
LAL.................2 DROPPING TO 1.
MIXING HEIGHT.......DROPPING TO BELOW 500 FEET AGL.
MIXING WINDS........NORTHEAST AROUND 3 TO 7 MPH.

.FRIDAY...

SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING MOSTLY CLOUDY.
                    CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
                    AFTERNOON.
MAX TEMPERATURE.....AROUND 82 TO 85.
MIN HUMIDITY........33 TO 38 PERCENT.
WIND (20 FT)........
   SLOPE/VALLEY.....UPSLOPE/UPVALLEY 2 TO 5 GUSTS TO 8 MPH EXCEPT
                    STRONG AND GUSTY IN VICINITY OF THUNDERSTORMS. .
   RIDGETOP.........BECOMING SOUTHEAST TO SOUTHWEST 2 TO 4 GUSTS TO 12
                    MPH EXCEPT STRONG AND GUSTY IN VICINITY OF
                    THUNDERSTORMS.
CWR.................20 PERCENT.
LAL.................2.
MIXING HEIGHT.......INCREASING TO 10000 FT AGL
                    LATE IN THE MORNING AND AFTERNOON.
MIXING WINDS........SOUTHERLY 4 TO 8 MPH.


FORECASTER...SMITH
REQUESTED BY...JAN HUNT
REASON FOR REQUEST...PRESCRIBED
.TAG 20090528.PLACE.02/STO

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