FNUS75 KPIH 031022
FWSPIH

SPOT FORECAST FOR HALSTEAD...USFS
NATIONAL WEATHER SERVICE POCATELLO ID
422 AM MDT WED OCT 3 2012

FORECAST IS BASED ON REQUEST TIME OF 1838 MDT ON OCTOBER 02.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A LOW PRESSURE TROUGH POSITIONED OVER NORTHWEST
MONTANA THIS MORNING WILL DIG SOUTHEAST INTO NORTHERN WYOMING
THIS AFTERNOON RESULTING IN BREEZY WEST-NORTHWEST WINDS EARLY
THIS MORNING BECOMING NORTH THEN NORTHEAST THROUGHOUT THE DAY
AS A DRY SURFACE COLD FRONT BACKS THROUGH THE REGION. COOL AND
DRY CONDITONS WILL CONTINUE THROUGH FRIDAY.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
TEMPERATURE.........MAX 52 TO 57 BELOW 6700 FT MSL
                    MAX 40 TO 45 ABOVE 9000 FT MSL.
RH..................MIN 22 TO 27 PERCENT BELOW 6700 FT MSL
                    MIN 17 TO 22 PERCENT ABOVE 9000 FT MSL.
WIND (20 FT)........DRAINAGE WINDS TO 8 MPH BELOW 7000 FT MSL THIS
                    MORNING BECOMING NORTHWEST 6 TO 12 MPH IN THE
                    AFTERNOON. WEST-NORTHWEST WINDS 10 TO 20 MPH WITH
                    GUSTS UP TO 35 MPH ABOVE 8500 FT MSL THIS MORNING
                    BECOMING NORTHEAST TO EAST 5 TO 15 MPH WITH GUSTS
                    UP TO 25 MPH THIS AFTERNOON.
CWR.................1 PERCENT.
MIXING HEIGHT.......SHALLOW SURFACE BASED INVERSION UP TO 500 FT AGL
                    IN THE VALLEYS EARLY THIS MORNING. OVERALL MIXING
                    LEVEL INCREASING TO 12500 FT MSL IN THE AFTERNOON.
MIXING WINDS........WINDS BECOMING NORTH 10 TO 16 MPH IN THE
                    AFTERNOON.
HAINES INDEX........2.
LAL.................1.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
TEMPERATURE.........MIN 13 TO 23.
RH..................MAX 87 TO 97 PERCENT BELOW 6700 FT MSL
                    MAX 65 TO 75 PERCENT ABOVE 9000 FT MSL.
WIND (20 FT)........EAST WINDS AROUND 6 MPH IN THE EVENING BECOMING
                    VARIABLE 2 TO 5 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......THERMAL BELT FORMING NEAR 8500 FT MSL OVERNIGHT.
MIXING WINDS........VARIABLE UP TO 10 MPH AFTER MIDNIGHT.
HAINES INDEX........3.
LAL.................1.

.THURSDAY...

SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY.
TEMPERATURE.........MAX 52 TO 57 BELOW 6700 FT MSL
                    MAX 40 TO 45 ABOVE 9000 FT MSL.
RH..................MIN 18 TO 28 PERCENT.
WIND (20 FT)........NORTHWEST WINDS AROUND 6 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......RISING TO 13000 FT MSL IN THE AFTERNOON.
MIXING WINDS........NORTHWEST AROUND 10 MPH IN THE AFTERNOON.
HAINES INDEX........4.
LAL.................1.

$$
FORECASTER...HUSTON
REQUESTED BY...CENTRAL IDAHO DISPATCH
TYPE OF REQUEST...WILDFIRE
.TAG 20121002.HALST.01/PIH