FNUS75 KBOI 081523
FWSBOI

SPOT FORECAST FOR CASTRO...BOISE NF
NATIONAL WEATHER SERVICE BOISE ID
923 AM MDT THU SEP 8 2011

FORECAST IS BASED ON REQUEST TIME OF 0835 MDT ON SEPTEMBER 08.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...SLIGHT CHANCE OF THUNDERSTORMS AND HAINES 5 THROUGH THIS EVENING...
...NORTHEAST STEERING WINDS WILL PERSIST THROUGH FRIDAY...

.DISCUSSION...
NORTHEAST MID-LEVEL STEERING FLOW WILL CONTINUE ACROSS THE CASTRO
FIRE DUE TO AN UPPER LEVEL LOW OVER THE UPPER SNAKE RIVER PLAIN. A
VERY WARM THERMAL AXIS WEST OF THE CASTRO WILL SUPPORT NORTH TO
SOUTHEAST SURFACE WINDS THROUGH FRIDAY AS WELL. MID LEVEL LAPSE
RATES ARE STEEP AND THERE IS SOME MID LEVEL MOISTURE OVER THE
SALMON-CHALLIS WHICH WILL ADVECT EAST TO SOUTHWEST OVER THE FIRE
THIS AFTERNOON WHICH WILL SUPPORT A SLIGHT CHANCE OF MAINLY DRY
THUNDERSTORMS. EAST WINDS LOOK TO BE A LITTLE STRONGER FRIDAY.
ALSO USING OBS FROM FOX TRAIL RIDGE...CANYON CREEK AND JACKSON PEAK.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY UNTIL NOON THEN PARTLY CLOUDY
                    WITH A SLIGHT CHANCE OF THUNDERSTORMS.
MAX TEMPERATURE.....69 TO 80.
MIN HUMIDITY........15 TO 20 PERCENT.
WIND - EYE LEVEL....NORTHWEST 3 GUSTING TO 10 MPH.
HAINES INDEX........5 MODERATE.
MIXING HEIGHT.......12500 FT AGL.
TRANSPORT WIND......NORTHEAST AROUND 5 MPH.
VENTILATION INDEX...625 GOOD.


.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF THUNDERSTORMS
                    WITH GUSTY WINDS THIS EVENING.
MIN TEMPERATURE.....53 TO 55.
MAX HUMIDITY........39 TO 41 PERCENT.
WIND - EYE LEVEL....NORTHEAST 3 TO 6 MPH GUSTING TO 15 MPH.
HAINES INDEX........5 MODERATE.
MIXING HEIGHT.......1500 FT AGL.
TRANSPORT WIND......NORTHEAST AROUND 10 MPH.
VENTILATION INDEX...150 POOR.

.FRIDAY...

SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....68 TO 78.
MIN HUMIDITY........16 TO 21 PERCENT.
WIND - EYE LEVEL....NORTHEAST AROUND 5 MPH.
HAINES INDEX........5 MODERATE.
MIXING HEIGHT.......11500 FT AGL.
TRANSPORT WIND......NORTHEAST AROUND 10 MPH.
VENTILATION INDEX...1150 EXCELLENT.

$$
FORECASTER...MILLS
REQUESTED BY...COLIN GOOD
TYPE OF REQUEST...WILDFIRE
.TAG 20110908.CASTR.01/BOI