FNUS75 KBOI 131548
FWSBOI

SPOT FORECAST FOR ROCK CREEK TREEWELL...BOISE NF
NATIONAL WEATHER SERVICE BOISE ID
948 AM MDT FRI MAR 13 2009

FORECAST IS BASED ON IGNITION TIME OF 1030 MDT ON MARCH 13.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...LIGHT WINDS TODAY WITH INCREASING WINDS SATURDAY AHEAD OF A COLD FRONT...

.DISCUSSION...
WEAK HIGH PRESSURE AT THE SURFACE AND ALOFT WILL BRING LIGHT WINDS TO THE
AREA TODAY AND BE MAINLY DOWN DRAINAGE. AN APPROACHING COLD FRONT WILL BE
MOVING INTO THE REGION SATURDAY AFTERNOON WITH SNOW EXPECTED BY THE EVENING
HOURS. WINDS AHEAD OF THIS FRONT WILL INCREASING THROUGH THE DAY ON
SATURDAY. MEANWHILE AN INVERSION OVER THE REGION TODAY WILL LIMIT MIXING
UNTIL LATE THIS AFTERNOON DURING THE MAX HEATING TIME PERIOD.


.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....HIGH AROUND 40.
MIN HUMIDITY........25 TO 35 PERCENT.
WIND - EYE LEVEL....LIGHT DOWNSLOPE LESS THAN 5 MPH.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......2500 TO 3000 FT AGL BY LATE AFTERNOON.
TRANSPORT WIND......SOUTH AROUND 10 MPH.
VENTILATION INDEX...250 TO 300 BY LATE AFTERNOON. FAIR VENTILATION.

.TONIGHT...

SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....AROUND 15 TO 20.
MAX HUMIDITY........70 TO 80 PERCENT.
WIND - EYE LEVEL....DOWNSLOPE LESS THAN 5 MPH. CALM BY MIDNIGHT.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......LESS THAN 500 FT AGL.
TRANSPORT WIND......SOUTH AROUND 5 MPH.
VENTILATION INDEX...LESS THAN 100 POOR.

.SATURDAY...

SKY/WEATHER.........INCREASING CLOUDS...BECOMING MOSTLY CLOUDY BY EARLY
                    AFTERNOON.
MAX TEMPERATURE.....35 TO 40.
MIN HUMIDITY........35 TO 40 PERCENT.
WIND - EYE LEVEL....DOWNSLOPE LESS THAN 5 MPH IN THE MORNING BECOMING
                    SOUTH TO SOUTHWEST AROUND 5 MPH. OVER THE RIDGETOPS
                    WINDS INCREASING FROM SOUTHWEST TO 15 MPH.
HAINES INDEX........2 VERY LOW.
MIXING HEIGHT.......3000 TO 3500 FT AGL.
TRANSPORT WIND......SOUTHWEST AROUND 15 TO 20 MPH.
VENTILATION INDEX...700 EXCELLENT.

$$
FORECASTER...BREIDENBACH/REDMAN
REQUESTED BY...REBECCA SWENSON
TYPE OF REQUEST...PRESCRIBED
.TAG 20090313.ROCKC.01/BOI