FNUS75 KBOI 081642
FWSBOI

SPOT FORECAST FOR COUGAR   51...PAYETTE NF
NATIONAL WEATHER SERVICE BOISE ID
1042 AM MDT THU OCT 8 2009

FORECAST IS BASED ON IGNITION TIME OF 1500 MDT ON OCTOBER 08.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...WINDY OVER THE RIDGES ON FRIDAY...

.DISCUSSION...
AN ARCTIC COLD FRONT WILL MOVE SOUTH OVER EASTERN IDAHO ON FRIDAY.
ALTHOUGH NO PRECIPITATION IS EXPECTED FOR THE COUGAR 51 BURN AREA...
THERE WILL BE SOME MID LEVEL CLOUDINESS AND SIGNIFICANT WINDS OVER
THE RIDGES. THE COUGAR BASIN IS SOMEWHAT SHELTERED FROM THE FIERCEST
NORTHWEST WINDS...BUT THE SADDLE BELOW THE LOOKOUT AND SADDLES IN
INDIAN MOUNTAIN RIDGE TO THE WEST COULD CHANNEL THE WINDS. WINDS FOR
AIRCRAFT OPERATIONS IN THIS COMPLEX TERRAIN COULD BE PARTICULARLY
CHALLENGING FRIDAY AFTERNOON.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....47 TO 52.
MIN HUMIDITY........33 PERCENT.
WIND - EYE LEVEL....NORTH 3 MPH IN THE MORNING...BECOMING UPSLOPE
                    SOUTHEAST AFTER 1200 HOURS THEN SOUTH AROUND 7 MPH
                    AFTER 1500 HOURS THIS AFTERNOON.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......5500 FT AGL.
TRANSPORT WIND......WEST AROUND 15 MPH.
VENTILATION INDEX...825 EXCELLENT.

.TONIGHT...

SKY/WEATHER.........INCREASING CLOUDS.
MIN TEMPERATURE.....28 TO 31.
MAX HUMIDITY........60 TO 65 PERCENT.
WIND - EYE LEVEL....DOWNSLOPE TOWARD THE LITTLE WEISER RIVER 2 TO 4 MPH
                    AFTER 1800 HOURS...BECOMING DOWNVALLEY ALONG THE RIVER
                    NORTH 5 TO 8 MPH.
HAINES INDEX........2 VERY LOW.
MIXING HEIGHT.......800 FT AGL.
TRANSPORT WIND......NORTHWEST 5 TO 10 MPH.
VENTILATION INDEX...100 POOR.

.FRIDAY...

SKY/WEATHER.........PARTLY SUNNY.
MAX TEMPERATURE.....42 TO 47.
MIN HUMIDITY........37 TO 40 PERCENT.
WIND - EYE LEVEL....REMAINING DOWNVALLEY THROUGH THE DAY NORTH TO NORTHWEST
                    8 TO 12 MPH. STRONGER GUSTS AT THE TOP 25 TO 35 MPH.
HAINES INDEX........2 VERY LOW.
MIXING HEIGHT.......5500 FT AGL.
TRANSPORT WIND......NORTHWEST 30 TO 35 MPH.
VENTILATION INDEX...1100 EXCELLENT.

$$
FORECASTER...DECKER
REQUESTED BY...PAYETTE NATIONAL FOREST
TYPE OF REQUEST...PRESCRIBED
.TAG 20091008.COUGA.02/BOI