FNUS75 KBOI 221412
FWSBOI

SPOT FORECAST FOR 49 ER...BOF-IDAHO CITY
NATIONAL WEATHER SERVICE BOISE ID
812 AM MDT FRI MAY 22 2009

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON MAY 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...ISOLATED DRY THUNDERSTORMS THIS AFTERNOON...

.DISCUSSION...
AN UPPER LEVEL RIDGE IS BUILDING OVER THE AREA. WINDS ALOFT SHIFTING
INTO THE SOUTHWEST WILL BEGIN TO ADVECT MORE MOIST AND UNSTABLE AIR
NORTH OVER OUR REGION THIS AFTERNOON. THIS WILL COMBINE WITH WARMING
TEMPERATURES TO CREATE A SLIGHT CHANCE OF AFTERNOON AND EVENING
THUNDERSTORMS OVER THE BURN AREA. THE MAIN THREAT WITH THESE STORMS
WILL BE GUSTY WINDS. SATURDAY AFTERNOON AND EVENING ANY THUNDERSTORMS
WILL BE WET.

.TODAY...

SKY/WEATHER.........SUNNY THIS MORNING. SCATTERED CLOUDS THIS
                    AFTERNOON WITH SLIGHT CHANCE DRY THUNDERSTORMS
                    AFTER 3 PM.
MAX TEMPERATURE.....79 TO 84.
MIN HUMIDITY........15 TO 20 PERCENT.
WIND - EYE LEVEL....EAST AROUND 5 MPH IN THE MORNING...SHIFTING TO
                    THE WEST 4 TO 7 MPH IN THE AFTERNOON. WINDS
                    STRONGER AND GUSTY NEAR THUNDERSTORMS.
HAINES INDEX........4 LOW.
MIXING HEIGHT.......10000 FT AGL.
TRANSPORT WIND......WEST AROUND 5 MPH.
VENTILATION INDEX...500 GOOD.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE DRY THUNDERSTORMS
                    UNTIL ABOUT 9 PM.
MIN TEMPERATURE.....43 TO 48.
MAX HUMIDITY........58 TO 65 PERCENT.
WIND - EYE LEVEL....WEST 3 TO 6 MPH IN THE EVENING...SHIFTING TO
                    THE SOUTHEAST AROUND 4 MPH AFTER MIDNIGHT. WINDS
                    STRONGER AND GUSTY NEAR THUNDERSTORMS.
HAINES INDEX........4 LOW.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WIND......NORTH AROUND 5 MPH.
VENTILATION INDEX...50 POOR.

.SATURDAY...

SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF SHOWERS. SLIGHT CHANCE
                    WET THUNDERSTORMS AFTERNOON AND EVENING.
MAX TEMPERATURE.....77 TO 82.
MIN HUMIDITY........21 TO 26 PERCENT.
WIND - EYE LEVEL....EAST 3 TO 5 MPH IN THE MORNING...SHIFTING TO
                    THE WEST AROUND 6 TO 12 MPH IN THE AFTERNOON.
HAINES INDEX........4 LOW.
MIXING HEIGHT.......9000 FT AGL.
TRANSPORT WIND......WEST AROUND 5 MPH.
VENTILATION INDEX...450 FAIR.

$$
FORECASTER...JT
REQUESTED BY...ALLYN SPANFELLNER
TYPE OF REQUEST...PRESCRIBED
.TAG 20090522.49ER_.01/BOI