FNUS76 KSTO 292319
FWSSTO

SPOT FORECAST FOR PONDEROSA FIRE 12CATGU006696...CAL FIRE
NATIONAL WEATHER SERVICE SACRAMENTO CA
419 PM PDT WED AUG 29 2012

FORECAST IS BASED ON REQUEST TIME OF 1525 PDT ON AUGUST 29.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A LOW PRESSURE TROUGH DEVELOPING OFF THE CALIFORNIA COAST ON
THURSDAY WILL BRING A LITTLE STRONGER SOUTHWEST WINDS TO THE
FIRE SITE ON THURSDAY THAN IT DID ON WEDNESDAY. LITTLE CHANGE
IS EXPECTED IN TEMPERATURE AND HUMIDITY ON THURSDAY AS THE
SOUTHWEST FLOW WILL BE WARM AND DRY. COOLER CONDITIONS ARE
EXPECTED OVER THE WEEKEND WITH SOME RECOVERY IN HUMIDITY AS THE
TROUGH MOVES INLAND. ALTHOUGH MONSOON MOISTURE MAY SPREAD
NORTHWARD OVER THE SIERRA THURSDAY NIGHT AND FRIDAY...THE
SOUTHWEST FLOW ALOFT FROM THE APPROACHING TROUGH SHOULD BE
STRONG ENOUGH TO KEEP ANY THUNDERSTORMS WELL EAST OF THE FIRE
SITE.


.TONIGHT...

SKY/WEATHER.........CLEAR. AREAS OF SMOKE.
MIN TEMPERATURE.....53-59.
MAX HUMIDITY........35-44 PERCENT.
WIND (20 FT)........
   SLOPE/VALLEY.....WEST WINDS UP TO 5 MPH SHIFTING TO THE EAST UP
                    TO 5 MPH AFTER MIDNIGHT.
   RIDGETOP.........WESTERLY 5 TO 10 MPH EARLY BECOMING SOUTHEAST
                    TO SOUTH LESS THAN 5 MPH AFTER MIDNIGHT.
MIXING HEIGHT.......LOWERING TO NEAR GROUND LEVEL.
MIXING WINDS........SOUTHWEST UP TO 5 MPH BECOMING EAST UP TO
                    5 MPH AFTER MIDNIGHT.

.THURSDAY...

SKY/WEATHER.........SUNNY. AREAS OF SMOKE.
MAX TEMPERATURE.....86-93.
MIN HUMIDITY........8-13 PERCENT.
WIND (20 FT)........
   SLOPE/VALLEY.....EAST WINDS UP TO 5 MPH SHIFTING TO THE
                    SOUTHWEST 3 TO 8 MPH WITH LOCAL GUSTS UP TO 15
                    MPH IN THE AFTERNOON.
   RIDGETOP.........SOUTHEAST UP TO 5 MPH EARLY MORNING BECOMING
                    SOUTHWEST 10 TO 15 MPH WITH LOCAL GUSTS UP TO
                    20 MPH.
MIXING HEIGHT.......RISING TO 6000 FT AGL.
MIXING WINDS........SOUTH 5 TO 10 MPH IN THE MORNING BECOMING
                    SOUTHWEST AT 15 MPH.


FORECASTER...JHM
REQUESTED BY...ROB DAUGHERTY  SITL
REASON FOR REQUEST...WILDFIRE
.TAG 20120829.PONDE.02/STO

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