FNUS75 KBOI 131251
FWSBOI

SPOT FORECAST FOR COTTONWOOD III...BOISE NF
NATIONAL WEATHER SERVICE BOISE ID
651 AM MDT WED OCT 13 2010

FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON OCTOBER 13.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...LIMITED SMOKE DISPERSION TODAY IMPROVES THURSDAY...

.DISCUSSION...
HIGH PRESSURE WILL CAP MIXING HEIGHTS AND LIMIT TRANSPORT WINDS AT
THE BURN SITE TODAY. TONIGHT IS COOL WITH GOOD RH RECOVERIES AT
THE BASE DECREASING AT RIDGE TOPS. WINDS INCREASE AT THE SURFACE AND
ALOFT ON THURSDAY AS WILL MIXING HEIGHTS. THESE CONDITIONS WILL
IMPROVE THE VENTILATION INDEX AT THE BURN SITE. THURSDAY WILL BE THE
WARMEST DAY WITH TEMPERATURES RANGING FROM MID-70S AT THE BASE TO MID-
60S ALONG RIDGE TOPS. A WEAK COLD FRONT IS EXPECTED ON FRIDAY.

.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 72.
MIN HUMIDITY........AROUND 21 PERCENT.
WIND - EYE LEVEL....UPSLOPE/UP-DRAINAGE 3 TO 6 MPH.
HAINES INDEX........4 LOW.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WIND......SOUTH AROUND 5 MPH.
VENTILATION INDEX...200 FAIR.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....AROUND 34.
MAX HUMIDITY........AROUND 95 PERCENT.
WIND - EYE LEVEL....UPSLOPE/UP-DRAINAGE 3 TO 7 MPH BECOMING
                    DOWNSLOPE/DOWN-DRAINAGE AFTER MIDNIGHT.
HAINES INDEX........4 LOW.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WIND......SOUTHEAST AROUND 5 MPH.
VENTILATION INDEX...50 POOR.

.THURSDAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....75 TO 78.
MIN HUMIDITY........16 TO 20 PERCENT.
WIND - EYE LEVEL....DOWNSLOPE/DOWN-DRAINAGE 3 TO 7 MPH IN THE
                    MORNING...BECOMING EAST 5 TO 9 MPH IN THE
                    AFTERNOON.
HAINES INDEX........4 LOW.
MIXING HEIGHT.......5000 FT AGL.
TRANSPORT WIND......SOUTH AROUND 15 MPH.
VENTILATION INDEX...750 EXCELLENT.

$$
FORECASTER...GROENERT
REQUESTED BY...CHRIS CHURCH
TYPE OF REQUEST...PRESCRIBED
.TAG 20101013.COTTO.01/BOI