FNUS75 KBOI 211311
FWSBOI

SPOT FORECAST FOR SUMMIT GULCH RX...USFS PAYETTE FOREST
NATIONAL WEATHER SERVICE BOISE ID
711 AM MDT WED SEP 21 2011

FORECAST IS BASED ON IGNITION TIME OF 0800 MDT ON SEPTEMBER 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...WARMER AND CONTINUED DRY...

.DISCUSSION...RIDGE OF HIGH PRESSURE ALOFT CONTINUES TO BUILD AS
IT SHIFTS INTO THE FIRE AREA FROM THE SOUTHWEST.  SEVERAL DEGREES
WARMING AT HIGHER ELEVATIONS TODAY AND AGAIN THURSDAY.  WEAKENING
WINDS ALOFT WILL LIMIT SMOKE DISPERSION. HIGH PRESSURE RIDGE WILL
BE AT MAXIMUM STRENGTH FRIDAY AND SATURDAY WITH HIGH TEMPERATURES
ABOUT 15 DEGREES ABOVE NORMAL AND HUMIDITY AT LOWEST VALUES.  NO
RAIN UNTIL AT LEAST SUNDAY WHEN A WEAK WAVE FROM CALIFORNIA BRINGS
ONLY A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.  NO REALISTIC
CHANCE OF WETTING RAIN THROUGH THE END OF THE MONTH.

.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....72.
MIN HUMIDITY........16 PERCENT.
WIND - EYE LEVEL....NORTH 3 TO 4 MPH IN THE MORNING...SHIFTING TO
                    THE SOUTHWEST 3 TO 6 MPH IN THE AFTERNOON.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......7000 FT AGL.
TRANSPORT WIND......SOUTHWEST AROUND 5 MPH.
VENTILATION INDEX...350 FAIR.

.TONIGHT...

SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....58.
MAX HUMIDITY........32 PERCENT.
WIND - EYE LEVEL....SOUTHWEST UP TO 4 MPH IN THE EVENING...SHIFTING
                    TO THE NORTHEAST UP TO 3 MPH AFTER MIDNIGHT.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WIND......EAST AROUND 5 MPH.
VENTILATION INDEX...50 POOR.

.THURSDAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....74.
MIN HUMIDITY........16 PERCENT.
WIND - EYE LEVEL....SOUTH 4 TO 10 MPH. GUSTS UP TO 20 MPH IN THE
                    AFTERNOON.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......6500 FT AGL.
TRANSPORT WIND......SOUTHWEST AROUND 5 MPH.
VENTILATION INDEX...325 FAIR.

$$
FORECASTER...COLIN
REQUESTED BY...DISPATCH
TYPE OF REQUEST...PRESCRIBED
.TAG 20110921.SUMMI.01/BOI