FNUS75 KBOI 051745
FWSBOI

SPOT FORECAST FOR LOST VALLEY RX...PAYETTE NF
NATIONAL WEATHER SERVICE BOISE ID
1145 AM MDT SAT SEP 5 2009

FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON SEPTEMBER 05.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR STRONG
AND GUSTY WINDS AND LOW AFTERNOON RH...

.DISCUSSION...
MID LEVEL CLOUDS MOVING OVER THE AREA MAY BRING A VERY BRIEF SPRINKLE TO THE
BURN AREA TODAY...BUT THE MAIN WEATHER FACTOR FOR THE DAY WILL BE THE APPROACHING
COLD FRONT. THIS FRONT IS EXPECTED TO MOVE THROUGH THE REGION JUST AFTER
MIDNIGHT. PRIOR TO THIS STRONG SOUTH ARE EXPECTED TO MOVE UP THE WEISER
RIVER AND HIGHWAY 93 CORRIDOR THIS AFTERNOON. WINDS WILL SHIFT NORTHWEST
AFTER MIDNIGHT AND REMAIN NORTHWEST THROUGH TUESDAY. MUCH COOLER CONDITIONS ARE
EXPECTED SUNDAY AND MONDAY.


.TODAY...

SKY/WEATHER.........CLEARING BY THIS AFTERNOON.
MAX TEMPERATURE.....AROUND 85.
MIN HUMIDITY........AROUND 15 PERCENT.
WIND - EYE LEVEL....LIGHT WIND THIS MORNING BECOMING SOUTH TO SOUTHEAST
                    8 TO 14 MPH WITH GUSTS TO 25 MPH BY THIS AFTERNOON.
HAINES INDEX........5 MODERATE.
MIXING HEIGHT.......9500 FT AGL.
TRANSPORT WIND......SOUTHWEST AROUND 30 MPH.
VENTILATION INDEX...2850 EXCELLENT.

.TONIGHT...

SKY/WEATHER.........INCREASING CLOUDS BY MIDNIGHT. A SLIGHT CHANCE OF SHOWERS
                    AFTER MIDNIGHT.
MIN TEMPERATURE.....51 TO 57.
MAX HUMIDITY........50 TO 60 PERCENT.
WIND - EYE LEVEL....SOUTH 8 TO 14 MPH WITH GUSTS TO 25 MPH THIS
                    EVENING...SHIFTING TO THE NORTHWEST 5 TO 10 MPH AFTER MIDNIGHT.
HAINES INDEX........2 VERY LOW.
MIXING HEIGHT.......2500 FT AGL.
TRANSPORT WIND......WEST AROUND 10 MPH.
VENTILATION INDEX...250 FAIR.

.SUNDAY...

SKY/WEATHER.........PARTLY CLOUDY.
MAX TEMPERATURE.....AROUND 65.
MIN HUMIDITY........NEAR 30 PERCENT.
WIND - EYE LEVEL....NORTHWEST 5 TO 8 MPH WITH GUSTS TO 15 MPH.
HAINES INDEX........2 VERY LOW.
MIXING HEIGHT.......8000 FT AGL.
TRANSPORT WIND......SOUTHWEST AROUND 15 MPH.
VENTILATION INDEX...1200 EXCELLENT.

$$
FORECASTER...REDMAN
REQUESTED BY...PAYETTE NATIONAL FOREST
TYPE OF REQUEST...PRESCRIBED
.TAG 20090905.LOSTV.01/BOI