FNUS76 KSTO 071157
FWSSTO

SPOT FORECAST FOR OLD GULCH PILE BURN...FOREST SERVICE
NATIONAL WEATHER SERVICE SACRAMENTO CA
457 AM PDT WED APR 7 2010

#37-10

FORECAST IS BASED ON IGNITION TIME OF 0900 PDT ON APRIL 07.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...HIGH PRESSURE ALOFT WILL PREVAIL OVER THE BURN SITE
TODAY. EASTERLY GRADIENTS FROM HIGH PRESSURE OVER NEVADA WILL RESULT
IN DOWNSLOPE FLOW THIS MORNING...BUT WINDS ARE EXPECTED TO TURN
UPSLOPE THIS AFTERNOON AS HIGH PRESSURE MOVES EASTWARD ACROSS THE
GREAT BASIN TODAY. THE DOWNSLOPE FLOW THIS MORNING WILL BE DRY...BUT
THE UPSLOPE FLOW THIS AFTERNOON IS EXPECTED TO RESULT IN A GRADUAL
INCREASE IN HUMIDITY. DOWNSLOPE FLOW IS EXPECTED AGAIN TONIGHT WITH
LOWERING HUMIDITY BY THURSDAY MORNING. THEN...AN UPPER LEVEL TROUGH
WILL MOVE ACROSS THE PACIFIC NORTHWEST ON THURSDAY WITH WINDS
BECOMING WESTERLY AND GRADUALLY INCREASING HUMIDITY.


.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....60-65.
MIN HUMIDITY........29-34 PERCENT OCCURRING THIS MORNING...WITH
                    RISING HUMIDITY DURING THE AFTERNOON.
WIND (20 FT)........
 LWR SLP/VALLEY.....NORTHEAST OR DOWNSLOPE 5 TO 10 MPH POSSIBLE
                    GUSTS TO 15 MPH IN THE MORNING...BECOMING
                    SOUTHWEST OR UPSLOPE 3 TO 7 MPH DURING
                    AFTERNOON.
CWR.................0 PERCENT.
MIXING HEIGHT.......RISING TO 4000-4500 FT AGL.
MIXING WINDS........NORTHEAST 7 TO 12 MPH BECOMING WEST LESS THAN
                    5 MPH THIS AFTERNOON.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....41-46.
MAX HUMIDITY........65-70 PERCENT.
WIND (20 FT)........
 LWR SLP/VALLEY.....EAST TO SOUTHEAST 4 TO 8 MPH.
MIXING HEIGHT.......LOWERING TO GROUND LEVEL.
MIXING WINDS........EAST TO SOUTHEAST 5 TO 10 MPH.

.THURSDAY...

SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....59-63.
WIND (20 FT)........
 LWR SLP/VALLEY.....BECOMING SOUTHWEST 5 TO 10 MPH BY MID
                    MORNING...THEN NORTHWEST LATE IN THE
                    AFTERNOON.
MIXING HEIGHT.......RISING TO 4500 TO 5000 FT AGL.
MIXING WINDS........SOUTHEAST 5 TO 10 MPH IN THE MORNING BECOMING
                    SOUTHWEST THEN NORTHWEST 8 TO 15 MPH.


FORECASTER...JHM
REQUESTED BY...STEVE BARAN
REASON FOR REQUEST...PRESCRIBED
.TAG 20100407.OLDGU.01/STO

$$