FNUS75 KBOI 080004
FWSBOI

SPOT FORECAST FOR COUGAR   51...USFS
NATIONAL WEATHER SERVICE BOISE ID
604 PM MDT WED OCT 7 2009

FORECAST IS BASED ON IGNITION TIME OF 1400 MDT ON OCTOBER 09.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...WINDY CONDITIONS DEVELOPING FRIDAY...
...REINFORCING SHOT OF COLD AIR MOVING SOUTH...

.DISCUSSION...
.A NORTHWEST FLOW OF DRY AIR WILL SPREAD OVER THE BURN SITE FRIDAY
AFTER SOME MORNING CLOUDS. THE PRESSURE GRADIENT WILL BEGIN TIGHTENING
AS INTENSE HIGH PRESSURE BUILDS ALONG THE WEST COAST AND LOW PRESSURE
DEVELOPS OVER MONTANA. THIS WILL CAUSE RIDGE TOP WINDS TO INCREASE TO
30 MPH FRIDAY AFTERNOON WHILE SHELTERED AREAS HAVE MUCH LIGHTER WINDS.
TEMPERATURES WILL REMAIN ON THE COOL SIDE BOTH THURSDAY AND FRIDAY AS
MORE COLD AIR MOVES SOUTH.

.THURSDAY...

SKY/WEATHER.........PARTLY SUNNY.
MAX TEMPERATURE.....41 TO 52.
MIN HUMIDITY........32 TO 38 PERCENT.
WIND - EYE LEVEL....NORTHEAST UP TO 3 MPH IN THE MORNING...SHIFTING
                    TO THE WEST AROUND 6 MPH IN THE AFTERNOON.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......5000 FT AGL.
TRANSPORT WIND......WEST AROUND 15 MPH.
VENTILATION INDEX...750 EXCELLENT.

.THURSDAY NIGHT...

SKY/WEATHER.........PARTLY CLOUDY...THEN BECOMING MOSTLY CLOUDY.
                    FEW FLURRIES.
MIN TEMPERATURE.....22 TO 29.
MAX HUMIDITY........66 TO 81 PERCENT.
WIND - EYE LEVEL....NORTHWEST 4 TO 10 MPH.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......800 FT AGL.
TRANSPORT WIND......NORTHWEST AROUND 5 MPH.
VENTILATION INDEX...40 POOR.

.FRIDAY...

SKY/WEATHER.........PARTLY CLOUDY IN THE MORNING THEN BECOMING SUNNY
                    AND WINDY BY AFTERNOON.
MAX TEMPERATURE.....37 TO 49.
MIN HUMIDITY........30 TO 40 PERCENT.
WIND - EYE LEVEL....NORTHWEST 6 TO 12 MPH INCREASING TO 10 TO 20 MPH
                    BY AFTERNOON WITH GUSTS TO 30 MPH AT RIDGE TOP LEVEL.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......4500 FT AGL.
TRANSPORT WIND......NORTHWEST AROUND 25 MPH.
VENTILATION INDEX...1125 EXCELLENT.

FRIDAY NIGHT...

SKY/WEATHER.........MOSTLY CLEAR AND COLDER.
MIN TEMPERATURE.....17 TO 24.
MAX HUMIDITY........72 TO 90 PERCENT.
WIND - EYE LEVEL....NORTHWEST 10 TO 20 MPH IN THE EVENING
                    BECOMING NORTH TO NORTHEAST 4 TO 8 MPH AFTER SUNSET.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......4500 FT AGL.
TRANSPORT WIND......NORTH 10 TO 15 MPH IN THE EVENING BECOMING NORTHEAST
                    5 MPH AFTER BY MIDNIGHT.
VENTILATION INDEX...225 FAIR.

$$
FORECASTER...SKARI
REQUESTED BY...PAYETTE NATIONAL FOREST
TYPE OF REQUEST...PRESCRIBED
.TAG 20091009.COUGA.01/BOI