FNUS75 KBOI 021543
FWSBOI

SPOT FORECAST FOR SUMMIT GULCH RX...USFS PAYETTE FOREST
NATIONAL WEATHER SERVICE BOISE ID
943 AM MDT THU SEP 2 2010

FORECAST IS BASED ON IGNITION TIME OF 0955 MDT ON SEPTEMBER 02.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...BIG WARM UP WITH HOT TEMPERATURES AND LOW RH/S FRIDAY AND SATURDAY...
...THE WARMUP FOLLOWED BY A SIGNIFICANT COOLDOWN SUNDAY AND MONDAY...

.DISCUSSION...
INTENSE HIGH PRESSURE ALOFT WILL BUILD NORTH FROM CALIFORNIA AND THE
GREAT BASIN BRINGING VERY WARM AND DRY WEATHER TO THE BURN SITE THE NEXT
TWO DAYS. THERE IS ALSO A CHANCE FOR WIDELY SCATTERED THUNDERSTORMS LATE
FRIDAY AFTERNOON WITH A BETTER CHANCE SATURDAY AS THE UPPER RIDGE BEGINS
TO BREAK DOWN AND INSTABILITY INCREASES. CONDITIONS TURN WINDY AND COOL
SUNDAY BEHIND THE COLD FRONT.

.TODAY...

SKY/WEATHER.........SUNNY. WARMER.
MAX TEMPERATURE.....70 TO 77.
MIN HUMIDITY........21 TO 26 PERCENT.
WIND - EYE LEVEL....NORTH AROUND 5 MPH IN THE MORNING...SHIFTING TO
                    THE SOUTHWEST 3 TO 5 MPH IN THE AFTERNOON.
HAINES INDEX........4 LOW.
MIXING HEIGHT.......6000 FT AGL.
TRANSPORT WIND......SOUTH AROUND 5 MPH.
VENTILATION INDEX...300 FAIR.

.TONIGHT...

SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....52 TO 57.
MAX HUMIDITY........43 TO 48 PERCENT.
WIND - EYE LEVEL....WEST AROUND 4 MPH IN THE EVENING...SHIFTING TO
                    THE NORTHEAST 3 TO 6 MPH AFTER MIDNIGHT.
HAINES INDEX........4 LOW.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WIND......EAST AROUND 5 MPH.
VENTILATION INDEX...25 POOR.

.FRIDAY...

SKY/WEATHER.........MOSTLY SUNNY. VERY WARM AND DRIER.
MAX TEMPERATURE.....78 TO 86.
MIN HUMIDITY........17 TO 22 PERCENT.
WIND - EYE LEVEL....SOUTH 6 TO 9 MPH.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......6000 FT AGL.
TRANSPORT WIND......SOUTHWEST AROUND 10 MPH.
VENTILATION INDEX...600 GOOD.

$$
FORECASTER...SKARI
REQUESTED BY...DISPATCH
TYPE OF REQUEST...PRESCRIBED
.TAG 20100902.SUMMI.03/BOI