FNUS75 KBOI 211343
FWSBOI

SPOT FORECAST FOR ROCKY GREGORY...BOISE NF
NATIONAL WEATHER SERVICE BOISE ID
743 AM MDT TUE APR 21 2009

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

...WARM AND DRY TODAY...
...WINDS INCREASING WEDNESDAY WITH SLIGHT CHANCE OF THUNDERSTORMS...

.DISCUSSION...
CONDITIONS SIMILAR TO YESTERDAY THOUGH SEVERAL DEGREES WARMER. WINDS
BEGIN TO INCREASE ON WEDNESDAY AHEAD OF A COLD FRONT. WINDS WILL INCREASE
FROM THE WEST-SOUTHWEST OVER THE BURN SITE DURING THE AFTERNOON WITH GUSTS
TO 15 MPH AT LOWER ELEVATIONS AND TO 25 MPH ALONG RIDGE-TOPS. EXPECT THE
HIGHER GUSTS TO DEVELOP BETWEEN 11 AM AND 2 PM. A SLIGHT CHANCE OF
THUNDERSTORMS REMAINS FOR LATE AFTERNOON AND EARLY EVENING WEDNESDAY. A
COLD FRONT WILL MOVE THROUGH THE BOISE MOUNTAINS EARLY THURSDAY MORNING
WITH GUSTY WINDS AND LIGHT RAIN...WITH MOST AREAS RECEIVING A TENTH
OF AN INCH OR LESS.


.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 73 AT RIDGE TOPS TO 81 AT THE BASE.
MIN HUMIDITY........16 TO 21 PERCENT.
WIND - EYE LEVEL....EAST 3 TO 4 MPH IN THE MORNING...SHIFTING TO
                    THE WEST 3 TO 6 MPH IN THE AFTERNOON.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......6000 FT AGL.
TRANSPORT WIND......SOUTHWEST AROUND 5 MPH.
VENTILATION INDEX...300 FAIR.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....AROUND 40 AT THE BASE TO AROUND 49 AT RIDGE TOPS.
MAX HUMIDITY........69 TO 74 PERCENT.
WIND - EYE LEVEL....WEST 3 TO 6 MPH IN THE EVENING...SHIFTING
                    TO THE SOUTHEAST 4 TO 8 MPH AFTER MIDNIGHT.
HAINES INDEX........4 LOW.
MIXING HEIGHT.......2000 FT AGL.
TRANSPORT WIND......SOUTH AROUND 5 MPH.
VENTILATION INDEX...100 POOR.

.WEDNESDAY...

SKY/WEATHER.........MOSTLY SUNNY IN THE MORNING BECOMING PARTLY CLOUDY WITH
                    A 15 PERCENT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....71 TO 76.
MIN HUMIDITY........22 TO 27 PERCENT.
WIND - EYE LEVEL....WEST 3 TO 6 MPH. GUSTS TO 15 MPH AT LOWER ELEVATIONS AND
                    TO 25 MPH ALONG RIDGE-TOPS IN THE AFTERNOON.
HAINES INDEX........4 LOW.
MIXING HEIGHT.......8000 FT AGL.
TRANSPORT WIND......WEST AROUND 20 MPH.
VENTILATION INDEX...1600 EXCELLENT.

$$
FORECASTER...GROENERT/SMITH
REQUESTED BY...ALLYN SPANFELLNER
TYPE OF REQUEST...PRESCRIBED
.TAG 20090421.ROCKY.01/BOI