FNUS75 KBOI 081436
FWSBOI

SPOT FORECAST FOR SUMMIT RX...USFS PAYETTE FOREST
NATIONAL WEATHER SERVICE BOISE ID
836 AM MDT WED SEP 8 2010

FORECAST IS BASED ON IGNITION TIME OF 0820 MDT ON SEPTEMBER 08.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...LIGHT SHOWERS DEVELOPING LATER THIS MORNING AND A SLIGHT
   CHANCE OF THUNDERSTORMS THIS AFTERNOON...
...MORE WIND BUT COOL AND SHOWERY THURSDAY AFTERNOON...

.DISCUSSION...
AN UPPER LEVEL LOW WILL MEANDER ACROSS THE SUMMIT RX SITE THROUGH
THURSDAY. MOIST SOUTH/SOUTHWEST FLOW AHEAD OF THE LOW WILL BRING
SHOWERS UP FROM EASTERN OREGON AT 8 AM ACROSS THE SUMMIT RX ABOUT
11 AM. PRECIP AMOUNTS HAVE VARIED FROM 0.02 TO 0.15 INCHES...BEST
ESTIMATE FOR SUMMIT IS 0.07 INCHES 11 AM TO 4 PM AND 0.33 INCHES
FOR THE TOTAL ENDING 6 PM THURSDAY. ALTHOUGH RAIN IS NOT EXPECTED
TO BE CONTINUOUS THE BEST TIMES WILL BE LATER EACH DAY DUE TO
INSTABILITY FROM LIMITED DAYTIME HEATING. THERE'S A SLIGHT CHANCE
OF THUNDERSTORMS LATE EACH DAY. A BROAD SURFACE LOW OVER IDAHO
WILL EXIT EARLY THURSDAY MORNING. BUILDING HIGHER PRESSURE WILL
BRING MORE WIND ACROSS SUMMIT RX STARTING LATE THURSDAY MORNING.

.TODAY...

SKY/WEATHER.........MOSTLY CLOUDY. WIDELY SCATTERED SHOWERS IN THE
                    MORNING...THEN SCATTERED SHOWERS AND WIDELY
                    SCATTERED THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....55 TO 65.
MIN HUMIDITY........37 TO 50 PERCENT.
WIND - EYE LEVEL....NORTH 3 TO 6 MPH IN THE MORNING...SHIFTING TO
                    THE SOUTH AROUND 5 MPH IN THE AFTERNOON.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......8000 FT AGL.
TRANSPORT WIND......SOUTH AROUND 10 MPH.
VENTILATION INDEX...800 EXCELLENT.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF RAIN SHOWERS AND A
                    SLIGHT CHANCE OF THUNDERSTORMS IN THE
                    EVENING...THEN RAIN SHOWERS LIKELY AFTER
                    MIDNIGHT.
MIN TEMPERATURE.....42 TO 47.
MAX HUMIDITY........84 TO 94 PERCENT.
WIND - EYE LEVEL....SOUTHWEST 3 TO 6 MPH IN THE EVENING...SHIFTING
                    TO THE NORTH AROUND 7 MPH AFTER MIDNIGHT.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WIND......NORTH AROUND 10 MPH.
VENTILATION INDEX...50 POOR.

.THURSDAY...

SKY/WEATHER.........MOSTLY CLOUDY. RAIN SHOWERS LIKELY THROUGH THE
                    DAY.
MAX TEMPERATURE.....48 TO 58.
MIN HUMIDITY........49 TO 60 PERCENT.
WIND - EYE LEVEL....NORTHWEST 6 TO 9 MPH GUSTS TO 15 MPH IN THE
                    AFTERNOON.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WIND......NORTH AROUND 15 MPH.
VENTILATION INDEX...600 GOOD.

$$
FORECASTER...MILLS
REQUESTED BY...DISPATCH
TYPE OF REQUEST...PRESCRIBED
.TAG 20100908.SUMMI.02/BOI