FNUS75 KBOI 272050
FWSBOI

SPOT FORECAST FOR BLUE GULCH UNIT 17...SHOSHONE BLM
NATIONAL WEATHER SERVICE BOISE ID
250 PM MDT THU OCT 27 2011

FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON OCTOBER 28.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...FAIR VENTILATION FRIDAY WITH INCREASING CLOUDS AND NOT AS COLD FRIDAY NIGHT...

.DISCUSSION...A RIDGE OF HIGH PRESSURE HAS KEPT AN INVERSION OVER THE
BLUE GULCH BURN UNIT THE PAST SEVERAL DAYS. THIS WILL FINALLY CHANGE
BY FRIDAY AFTERNOON AS A WEAK SHORTWAVE TROUGH APPROACHES FROM THE WEST.
THIS WILL ALLOW SLIGHTLY BETTER MIXING AND VENTILATION. AS THE TROUGH
GETS CLOSER LATE FRIDAY NIGHT AND SATURDAY...THERE WILL BE INCREASED CLOUDS.

.FRIDAY...

SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....56 TO 61.
MIN HUMIDITY........17 TO 22 PERCENT.
WIND - EYE LEVEL....EAST AROUND 6 MPH.
HAINES INDEX........4 LOW.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WIND......SOUTH 5 TO 8 MPH.
VENTILATION INDEX...200 FAIR.

.FRIDAY NIGHT...

SKY/WEATHER.........PARTLY CLOUDY.
MIN TEMPERATURE.....30 TO 35.
MAX HUMIDITY........55 TO 65 PERCENT.
WIND - EYE LEVEL....SOUTH AROUND 5 MPH.
HAINES INDEX........4 LOW.
MIXING HEIGHT.......2000 FT AGL.
TRANSPORT WIND......SOUTHWEST AROUND 5 MPH.
VENTILATION INDEX...100 POOR.

$$
FORECASTER...DECKER
REQUESTED BY...RXB2 MCCOY
TYPE OF REQUEST...PRESCRIBED
.TAG 20111028.BLUEG.01/BOI