FNUS76 KSTO 282321
FWSSTO

SPOT FORECAST FOR SUMMIT FIRE...NPS
NATIONAL WEATHER SERVICE SACRAMENTO CA
421 PM PDT WED SEP 28 2011

FORECAST IS BASED ON REQUEST TIME OF 1545 PDT ON SEPTEMBER 28.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
HIGH PRESSURE CENTERED OVER THE GREAT BASIN WILL KEEP WARM AND DRY
WEATHER CONDITIONS OVER THE FIRE SITE THROUGH THURSDAY. PRESSURE
GRADIENTS WILL BE RELATIVELY LIGHT WITH MAINLY TERRAIN DRIVEN
TONIGHT AND EARLY THURSDAY. BY THURSDAY AFTERNOON THERE WILL BE
A LITTLE MORE WIND OVER THE FIRE SITE AS THE HIGH CENTER SHIFTS
EASTWARD. THE WEATHER PATTERN WILL CHANGE BY FRIDAY WITH THE
BEGINNING OF A COOLING TREND. THE COOLING TREND WILL CONTINUE
THROUGH THE WEEKEND WITH A SLIGHT CHANCE OF SHOWERS.


.TONIGHT...

SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....46-51.
MAX HUMIDITY........55-65 PERCENT.
WIND (20 FT)........
   SLOPE/VALLEY.....SOUTHEAST WINDS 5 TO 10 MPH SHIFTING TO THE
                    NORTHEAST LESS THAN 5 MPH AFTER MIDNIGHT.
   RIDGETOP.........SOUTH TO SOUTHWEST 8 TO 15 MPH.
MIXING HEIGHT.......LOWERING TO GROUND LEVEL.
MIXING WINDS........SOUTHWEST 5 TO 10 MPH IN THE EVENING BECOMING
                    NORTHEAST TO EAST LESS THAN 5 MPH AFTER
                    MIDNIGHT.

.THURSDAY...

SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....71-76.
MIN HUMIDITY........19-24 PERCENT.
WIND (20 FT)........
   SLOPE/VALLEY.....SOUTHEAST WINDS 3 TO 6 MPH BECOMING SOUTH
                    5 TO 10 MPH WITH GUSTS TO 15 MPH POSSIBLE
                    IN THE AFTERNOON.
   RIDGETOP.........SOUTH TO SOUTHWEST 10 TO 15 MPH IN THE MORNING
                    BECOMING SOUTHWEST 20 TO 28 MPH IN THE
                    AFTERNOON.
MIXING HEIGHT.......RISING TO 9000 TO 10,000 FT AGL.
MIXING WINDS........NORTHEAST TO EAST LESS THAN 5 MPH BECOMING
                    SOUTH TO SOUTHWEST 15 TO 20 MPH IN THE
                    AFTERNOON.


FORECASTER...JHM
REQUESTED BY...ERIC HENSEL
REASON FOR REQUEST...WILDFIRE
.TAG 20110928.SUMMI.01/STO

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