FNUS75 KPIH 061032
FWSPIH

SPOT FORECAST FOR WILLOW CANYON...USFS
NATIONAL WEATHER SERVICE POCATELLO ID
432 AM MDT TUE SEP 6 2011

FORECAST IS BASED ON REQUEST TIME OF 2055 MDT ON SEPTEMBER 05.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO MIDNIGHT MDT
TONIGHT FOR HIGH HAINES INDICES...

.DISCUSSION...POOR HUMIDITY RECOVERY WAS NOTED ACROSS A BROAD AREA
OF THE CENTRAL MOUNTAINS AGAIN THIS MORNING. THIS COUPLED WITH DRY
MID-LEVELS AND LINGERING INSTABILITY HAS PROMPTED ANOTHER RED FLAG
WARNING FOR HIGH HAINES INDICES. ACTIVE FIRES NORTH OF THE INCIDENT
RESPONDED STRONGLY TO SIMILAR CONDITIONS MONDAY. A LOW PRESSURE
SYSTEM WAS OBSERVED SHEARING NORTHEAST INTO WYOMING EARLY THIS
MORNING WITH TRAILING DYNAMICS EXPECTED TO SUPPORT ISOLATED
THUNDERSTORM ACTIVITY OVER THE FIRE AREA THIS AFTERNOON AND EVENING.
MID-LEVELS REMAIN DRY SO RAINFALL WILL BE SPOTTY WITH GUSTY WINDS
NEAR THUNDERSTORMS EVEN IN THE LIGHT WIND FLOW REGIME. SLIGHTLY
MORE STABLE CONDITIONS (MARGINAL) ARE EXPECTED WEDNESDAY WITHOUT
ANY SUPPORT FROM THE LOW AS IT DRIFTS SOUTH INTO COLORADO.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY.
                    SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS OVER
                    THE FIRE AREA IN THE AFTERNOON.
TEMPERATURE.........MAX 64 TO 68 AT 9700 MSL.
                    MAX 69 TO 72 AT 8700 MSL.
RH..................MIN 20 TO 24 PERCENT AT 9700 MSL.
                    MIN 16 TO 20 PERCENT AT 8700 MSL.
WIND (20 FT)........VARIABLE 2 TO 4 MPH BECOMING NORTHWEST TO
                    NORTHEAST 6 TO 9 MPH LATE IN THE AFTERNOON.
                    GUSTS TO 40 MPH POSSIBLE NEAR ANY THUNDERSTORMS
                    THAT DEVELOP.
CWR.................6 PERCENT.
MIXING HEIGHT.......10900 FT AGL.
MIXING WINDS........NORTH AROUND 13 MPH.
HAINES INDEX........5.
LAL.................1...THEN 2 IN THE AFTERNOON.

.TONIGHT...

SKY/WEATHER.........A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
                    IN THE EVENING...THEN BECOMING MOSTLY CLEAR.
TEMPERATURE.........MIN 44 TO 49.
RH..................MAX 40 TO 45 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 6 TO 9 MPH IN THE EVENING WITH
                    GUSTS TO 40 MPH NEAR THUNDERSTORMS. WINDS
                    BECOMING DOWNSLOPE 3 TO 6 MPH OVERNIGHT.
CWR.................5 PERCENT.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........LIGHT AND VARIABLE WINDS.
HAINES INDEX........5.
LAL.................2...THEN 1 AFTER MIDNIGHT.

.WEDNESDAY...

SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY. A
                    SLIGHT CHANCE OF A THUNDERSTORM IN THE
                    AFTERNOON.
TEMPERATURE.........MAX 66 TO 70 AT 9700 MSL.
                    MAX 71 TO 74 AT 8700 MSL.
RH..................MIN 19 TO 23 PERCENT AT 9700 MSL.
                    MIN 15 TO 19 PERCENT AT 8700 MSL.
WIND (20 FT)........VARIABLE 3 TO 6 MPH.
CWR.................6 PERCENT.
MIXING HEIGHT.......9100 FT AGL.
MIXING WINDS........SOUTHEAST AROUND 8 MPH.
HAINES INDEX........5.
LAL.................1...THEN 2 IN THE AFTERNOON.

$$
FORECASTER...HUSTON
REQUESTED BY...MARTELL GIBBONS
TYPE OF REQUEST...WILDFIRE
.TAG 20110905.WILLO.01/PIH