FNUS75 KBOI 201732
FWSBOI

SPOT FORECAST FOR TWIN SPRINGS ROAD...VALE DISPATCH
NATIONAL WEATHER SERVICE BOISE ID
1132 AM MDT TUE APR 20 2010

FORECAST IS BASED ON IGNITION TIME OF 1115 MDT ON APRIL 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...LAST WARM DAY FOR A WHILE...
...ISOLATED THUNDERSTORMS DEVELOPING THIS AFTERNOON...
...BIG CHANGE FOR WEDNESDAY THROUGH FRIDAY...

.DISCUSSION...
A COLD FRONT WILL BE MOVING INTO EASTERN OREGON EARLY THIS EVENING
BRINGING A SIGNIFICANT CHANGE IN THE WEATHER.  AHEAD OF THIS FRONT
THIS AFTERNOON LIES A FEW MORE HOURS OF WARM TEMPERATURES BEFORE
THE COOL DOWN STARTS. THE AIR MASS THIS AFTERNOON IS EXPECTED TO BECOME
INCREASINGLY UNSTABLE FOR A THREAT FOR OF ISOLATED THUNDERSTORMS OVER
THE BURN SITE. GUSTY WINDS UP TO 40 MPH IS POSSIBLE WITH ANY
STORMS THAT MOVE OVER THE SITE.

.THIS AFTERNOON...

SKY/WEATHER.........INCREASING CLOUDS. SCATTERED SHOWERS IN THE AFTERNOON
                    WITH ISOLATED THUNDERSTORMS.
MAX TEMPERATURE.....68 TO 73.
MIN HUMIDITY........30 TO 34 PERCENT.
WIND (EYE LEVEL)....WEST 4 TO 6 MPH...SHIFTING TO NORTH NORTHWEST
                    6 TO 10 MPH IN THE AFTERNOON. GUSTY AND ERRATIC WINDS UP
                    TO 40 MPH NEAR ANY THUNDERSTORMS.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......6500 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 10 MPH.
VENTILATION INDEX...325 FAIR.

.TONIGHT...

SKY/WEATHER.........CLOUDY. SHOWERS LIKELY IN THE EVENING WITH A SLIGHT
                    CHANCE OF THUNDERSTORMS...DECREASING TO A CHANCE OF
                    SHOWERS AFTER MIDNIGHT.
MIN TEMPERATURE.....45 TO 50.
MAX HUMIDITY........66 TO 71 PERCENT...BUT 85 TO 95 PERCENT IN SHOWER
                    ACTIVITY.
WIND (EYE LEVEL)....NORTHWEST 8 TO 14 MPH. GUSTY NEAR SHOWERS AND
                    THUNDERSTORMS.
HAINES INDEX........2 VERY LOW.
MIXING HEIGHT.......800 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH.
VENTILATION INDEX...120 POOR.

.WEDNESDAY...

SKY/WEATHER.........CLOUDY. SHOWERS LIKELY. MUCH COOLER.
MAX TEMPERATURE.....57 TO 62.
MIN HUMIDITY........34 TO 39 PERCENT.
WIND (EYE LEVEL)....SOUTHWEST AROUND 8 MPH IN THE
                    MORNING...INCREASING TO NORTHWEST 15 TO 25 MPH
                    IN THE AFTERNOON.
HAINES INDEX........2 VERY LOW.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 20 MPH.
VENTILATION INDEX...800 EXCELLENT.

$$
FORECASTER...SKARI
REQUESTED BY...RICHARD SUMMERFIELD
TYPE OF REQUEST...PRESCRIBED
.TAG 20100420.TWINS.01/BOI