FNUS75 KPIH 211101
FWSPIH

SPOT FORECAST FOR BALD...SOUTH IDAHO
NATIONAL WEATHER SERVICE POCATELLO ID
501 AM MDT WED OCT 21 2009

FORECAST IS BASED ON IGNITION TIME OF 1605 MDT ON OCTOBER 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A PACIFIC DISTURBANCE WILL PUSH INTO WASHINGTON THIS
MORNING AND THEN ADVANCE EAST ALONG THE CANADIAN BORDER TODAY AND
TONIGHT. ASSOCIATED MID AND UPPER-LEVEL CLOUDS WILL SPREAD OVER
THE BURN AREA THIS AFTERNOON WITH SOME BREAKS FOLLOWING AFTER
MIDNIGHT TONIGHT. DUE TO THE NORTHERN TRAJECTORY OF THE SYSTEM...
NO PRECIPITATION IS EXPECTED IN OR ABOUT THE BURN AREA TODAY OR
TONIGHT. UPPER LEVEL WINDS AND MIXING REMAIN WEAK THROUGHOUT THE
DAY TODAY HOWEVER RIDGE TOP WINDS ABOVE 9000 FEET SHOULD INCREASE
AFTER MIDNIGHT TONIGHT AS THE DISTURBANCE PASSES EAST AND THE FLOW
ALOFT CONSOLIDATES AND BECOMES MORE WEST-NORTHWEST...WHICH SHOULD
ENHANCE THE NORMAL DRAINAGE WINDS THROUGHOUT THE WOOD RIVER REGION.

.TODAY...

SKY/WEATHER.........INCREASING CLOUDS.
TEMPERATURE.........MAX/IGNITION 44.
RH..................MIN/IGNITION 60-70 PERCENT.
WIND (20 FT)........DOWNVALLEY WINDS TO 10 MPH UNTIL 1100 MDT...THEN
                    BECOMING UPSLOPE/UPVALLEY TO 5 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......6000-6500 MSL THIS MORNING...RISING TO AROUND
                    9100 MSL THIS AFTERNOON.
MIXING WINDS........SOUTHWEST TO WEST AROUND 10 MPH.
HAINES INDEX........2-3 LOW.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY.
TEMPERATURE.........MIN 34 TO 37.
RH..................MAX 80-85 PERCENT.
WIND (20 FT)........WEST-NORTHWEST WINDS 6 TO 9 MPH THROUGH
                    MIDNIGHT AND THEN INCREASING DOWNVALLEY 7 TO
                    12 MPH BY AROUND 0300 MDT.
CWR.................3 PERCENT.
MIXING HEIGHT.......FALLING TO AROUND 6200 MSL OVERNIGHT.
MIXING WINDS........WEST-NORTHWEST AROUND 13 MPH.

.THURSDAY...

SKY/WEATHER.........PARTLY CLOUDY.
TEMPERATURE.........MAX 47.
RH..................MIN 50-60 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 6 TO 12 MPH.
CWR.................2 PERCENT.
MIXING HEIGHT.......RISING TO 9500-10500 MSL DURING THE AFTERNOON.
MIXING WINDS........NORTHWEST AROUND 14 MPH.
HAINES INDEX........2.

$$
FORECASTER...HUSTON
REQUESTED BY...BRANDON BROWN
TYPE OF REQUEST...PRESCRIBED
.TAG 20091021.BALD_.01/PIH