FNUS75 KPIH 021115
FWSPIH

SPOT FORECAST FOR HALSTEAD...USFS
NATIONAL WEATHER SERVICE POCATELLO ID
454 AM MDT TUE OCT 2 2012

FORECAST IS BASED ON REQUEST TIME OF 1939 MDT ON OCTOBER 01.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...STRONG GUSTY WINDS AHEAD OF AN APPROACHING COLD FRONT WITH
NEAR RED FLAG CONDITIONS TODAY...

.DISCUSSION...A LOW PRESSURE SYSTEM DIGGING SOUTHEAST INTO MONTANA
THIS AFTERNOON WILL PRODUCE STRONG GUSTY WINDS ACROSS THE FIRE
AREA TODAY. THE COMBINATION OF STRONG GUSTY WINDS AND MARGINAL
AFTERNOON HUMIDITY LEVELS WILL PRODUCE NEAR RED FLAG CONDITIONS.
WINDS WILL BECOME NORTH FOLLOWING A DRY COLD FRONTAL PASSAGE
WEDNESDAYMORNING WITH MUCH COOLER TEMPERATURES THROUGHOUT THE DAY.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
TEMPERATURE.........MAX 68 TO 72 BELOW 7000 FT MSL
                    MAX 53 TO 58 ABOVE 8500 FT MSL.
RH..................MIN 15 TO 20 PERCENT BELOW 7000 FT MSL
                    MIN 25 TO 30 PERCENT ABOVE 8500 FT MSL.
WIND (20 FT)........DRAINAGE WINDS TO 10 MPH BELOW 8000 FT MSL THIS
                    MORNING QUICKLY MIXING OUT BY MID-MORNING AND
                    BECOMING SOUTHWEST TO WEST 8 TO 18 MPH WITH
                    GUSTS UP TO 25 MPH IN THE AFTERNOON. SOUTHWEST
                    AT 25 MPH WITH GUSTS TO 35 MPH ABOVE 8000 FT MSL
                    THIS MORNING AND BECOMING WEST LATE THIS
                    AFTERNOON.
CWR.................0 PERCENT.
MIXING HEIGHT.......THERMAL BELT AROUND 8000 TO 8500 FT MSL THIS
                    MORNING WITH THE MIXING LEVEL RISING TO AROUND
                    12500 TO 13000 FT MSL THIS AFTERNOON.
MIXING WINDS........SOUTHWEST AROUND 35 MPH ABOVE THE INVERSION THIS
                    MORNING WITH DRAINAGE WINDS UP TO 10 MPH BELOW
                    THE INVERSION. WINDS BECOMING WEST 25 TO 35 MPH
                    IN THE AFTERNOON.
HAINES INDEX........3.
LAL.................1.

.TONIGHT...

SKY/WEATHER.........CLEAR.
TEMPERATURE.........MIN 20 TO 25 BELOW 7500 FT MSL
                    MIN 33 TO 43 ABOVE 7500 FT MSL.
RH..................MAX 88 TO 98 PERCENT BELOW 7500 FT MSL
                    MAX 50 TO 65 PERCENT ABOVE 7500 FT MSL.
WIND (20 FT)........WEST TO NORTHWEST WINDS 10 TO 18 MPH WITH GUSTS
                    TO AROUND 35 MPH IN THE EVENING SHIFTING TO THE
                    NORTHWEST 6 TO 10 MPH BY MIDNIGHT AND DECREASING
                    AT ELEVATIONS BELOW 7500 FT MSL. WEST TO NORTHWEST
                    15 TO 25 MPH ABOVE 7500 FT MSL.
CWR.................0 PERCENT.
MIXING HEIGHT.......FALLING TO 7500 FT MSL OVERNIGHT.
MIXING WINDS........WEST 25 TO 35 MPH IN THE EVENING BECOMING
                    NORTHWEST 13 TO 17 MPH AFTER MIDNIGHT.
HAINES INDEX........3.
LAL.................1.

.WEDNESDAY...

SKY/WEATHER.........MOSTLY SUNNY.
TEMPERATURE.........MAX 50 TO 55 BELOW 7000 FT MSL.
                    MAX 35 TO 40 ABOVE 8500 FT MSL.
RH..................MIN 18 TO 23 PERCENT BELOW 7000 FT MSL
                    MIN 30 TO 40 PERCENT ABOVE 8500 FT MSL.
WIND (20 FT)........NORTH WINDS 10 TO 15 MPH WITH GUSTS TO 25 MPH.
CWR.................1 PERCENT.
MIXING HEIGHT.......RISING TO NEAR 11500 TO 12000 FT MSL IN
                    THE AFTERNOON.
MIXING WINDS........NORTH TO NORTHEAST UP TO 15 MPH.
HAINES INDEX........3.
LAL.................1.

$$
FORECASTER...HUSTON
REQUESTED BY...CENTRAL IDAHO DISPATCH
TYPE OF REQUEST...WILDFIRE
.TAG 20121001.HALST.01/PIH