FNUS75 KBOI 051207
FWSBOI

SPOT FORECAST FOR PATRICK BUTTE RX...USFS
NATIONAL WEATHER SERVICE BOISE ID
607 AM MDT SAT SEP 5 2009

FORECAST IS BASED ON IGNITION TIME OF 0700 MDT ON SEPTEMBER 05.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

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RED FLAG WARNING IN EFFECT FOR THE PRESCRIBED BURN SITE IN FIRE ZONE 401.
RED FLAG WARNING IN EFFECT FROM NOON MDT UNTIL 9PM TONIGHT FOR GUSTY WINDS
AND LOW HUMIDITIES.
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...INCREASING WINDS TODAY AND LOW AFTERNOON HUMIDITIES...
...HOT AND DRY ONE MORE DAY THEN MUCH COOLER AND BREEZY SUNDAY...

.DISCUSSION...
THE HOT RIDGE ALOFT WILL FINALLY BREAK DOWN TODAY AS A VIGOROUS UPPER
TROF APPROACHES THE WEST COAST.  WINDS AND LOW AFTERNOON RH WILL BE
THE MAIN IMPACT TODAY. GUSTY WINDS WILL BEGIN INCREASING THIS MORNING
AND REACH FULL STRENGTH BY MID AFTERNOON (2PM). THESE GUSTY WINDS WHEN
COMBINED WITH VERY LOW HUMIDITIES WILL SET THE STAGE FOR POTENTIAL RAPID
SPREAD AND FIRE GROWTH. MUCH COOLER WEATHER ARRIVES BEHIND A COLD FRONT
SUNDAY. WIDELY SCATTERED THUNDERSTORMS ARE ALSO POSSIBLE THIS AFTERNOON.


.TODAY...

SKY/WEATHER.........PARTLY SUNNY. WIDELY SCATTERED SHOWERS AND
                    THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....68 TO 72.
MIN HUMIDITY........17 TO 27 PERCENT.
WIND - EYE LEVEL....NORTH NORTHEAST 3 TO 5 MPH THIS MORNING BECOMING
                    SOUTH SOUTHWEST 8 TO 14 MPH BY NOON WITH GUSTS UP TO
                    30 MPH HIS AFTERNOON.
HAINES INDEX........4 LOW.
MIXING HEIGHT.......7000 FT AGL.
TRANSPORT WIND......SOUTH AROUND 30 MPH.
VENTILATION INDEX...2100 EXCELLENT.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF RAIN SHOWERS THROUGH
                    THE NIGHT. A CHANCE OF THUNDERSTORMS IN THE
                    EVENING. GUSTY WINDS.
MIN TEMPERATURE.....41 TO 46.
MAX HUMIDITY........76 TO 93 PERCENT.
WIND - EYE LEVEL....WEST 17 TO 23 MPH IN THE EVENING...BECOMING
                    NORTHEAST 3 TO 7 MPH AFTER MIDNIGHT.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WIND......SOUTH AROUND 10 MPH.
VENTILATION INDEX...50 POOR.

.SUNDAY...

SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF RAIN SHOWERS THROUGH
                    THE DAY. A CHANCE OF THUNDERSTORMS IN THE
                    AFTERNOON. MUCH COOLER.
MAX TEMPERATURE.....47 TO 62.
MIN HUMIDITY........36 TO 56 PERCENT.
WIND - EYE LEVEL....SOUTH 8 TO 14 MPH...AFTERNOON GUSTS UP TO 25 MPH.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......6500 FT AGL.
TRANSPORT WIND......SOUTHWEST AROUND 30 MPH.
VENTILATION INDEX...1950 EXCELLENT.

$$
FORECASTER...SKARI
REQUESTED BY...PAYETTE NATIONAL FOREST
TYPE OF REQUEST...PRESCRIBED
.TAG 20090905.PATRI.01/BOI