FNUS75 KBOI 202222
FWSBOI

SPOT FORECAST FOR CRAWFORD HF BLOCK 3...BOISE NF
NATIONAL WEATHER SERVICE BOISE ID
422 PM MDT WED MAY 20 2009

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON MAY 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...WARMER TEMPERATURES NEXT FEW DAYS...

.DISCUSSION...
SURFACE HIGH PRESSURE WILL BE OVER THE REGION EARLY THURSDAY MORNING
THEN SHIFT EASTWARD BY THE AFTERNOON AS A THERMAL TROUGH BEGINS TO
DEVELOP ACROSS EASTERN OREGON. WARMING TEMPERATURES ARE EXPECTED
OVER THE NEXT FEW DAYS. LIGHT WINDS EXPECTED THURSDAY
THEN BECOME SOUTHERLY AS THE THERMAL TROUGH APPROACHES. MOISTURE IS
EXPECTED TO BEGIN TO CREEP NORTH OF THE NEVADA BORDER BY SATURDAY BUT
APPEARS TO BE LIMITED TO OVER THE HIGHER TERRAIN.


.TODAY / THURSDAY/...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....64 TO 73.
MIN HUMIDITY........14 TO 19 PERCENT.
WIND - EYE LEVEL....LESS THAN 3 MPH IN THE MORNING...BECOMING WEST TO SOUTHWEST
                    3 TO 6 MPH IN THE AFTERNOON.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......7000 FT AGL.
TRANSPORT WIND......SOUTHWEST AROUND 10 MPH.
VENTILATION INDEX...700 EXCELLENT.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....34 TO 39.
MAX HUMIDITY........58 TO 70 PERCENT.
WIND - EYE LEVEL....WEST 3 TO 6 MPH IN THE EVENING...BECOMING DOWN DRAINAGE
                    2 TO 5 MPH AFTER SUNSET.
HAINES INDEX........4 LOW.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WIND......NORTHEAST AROUND 5 MPH.
VENTILATION INDEX...50 POOR.

.FRIDAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....69 TO 75.
MIN HUMIDITY........16 TO 22 PERCENT.
WIND - EYE LEVEL....LESS THAN 3 MPH IN THE MORNING...BECOMING SOUTH TO SOUTHWEST
                    3 TO 6 MPH IN THE AFTERNOON.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......10500 FT AGL.
TRANSPORT WIND......SOUTHWEST AROUND 10 MPH.
VENTILATION INDEX...1050 EXCELLENT.

$$
FORECASTER...REDMAN
REQUESTED BY...MARK LOESKE
TYPE OF REQUEST...PRESCRIBED
.TAG 20090521.CRAWF.01/BOI