FNUS75 KBOI 221757
FWSBOI

SPOT FORECAST FOR 5 CR  RX...BURNS BLM
NATIONAL WEATHER SERVICE BOISE ID
1157 AM MDT THU OCT 22 2009

FORECAST IS BASED ON IGNITION TIME OF 1155 MDT ON OCTOBER 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...COLD FRONT EXPECTED FRIDAY NIGHT AND SUNDAY NIGHT...

.DISCUSSION...
A BRIEF RIDGE ALOFT WILL BE OVER THE BURN SITE TODAY BEFORE THE NEXT
COLD FRONT MOVES INTO THE REGION FRIDAY EVENING. AT THIS POINT THE BULK
OF THE PRECIPITATION IS EXPECTED TO STAY NORTH OF THE BURNS SITE...BUT
A FEW HUNDREDTHS OF RAIN IS POSSIBLE. THE BIG CONCERN WILL BE A STRONG PRESSURE
GRADIENT THAT SETS UP SATURDAY MORNING ALONG WITH A STRONG UPPER LEVEL
JET THAT RIDES OVER THE REGION. THIS WILL BRING GUSTY WINDS UP TO 25 MPH TO
THE REGION.  A STRONGER AND COLDER COLD FRONT MOVES IN ON SUNDAY EVENING
BRINGING BETTER CHANCES OF WETTING RAINS TO THE REGION. THE UPPER TROUGH
IS EXPECTED TO REMAIN ACROSS THE ROCKIES THROUGH THE FIRST OF NEXT WEEK
BRINGING COOLER AND DRY NORTHERLY FLOW ACROSS SOUTHEAST OREGON.


.REST OF TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....AROUND 55.
MIN HUMIDITY........45 TO 51 PERCENT.
WIND - EYE LEVEL....NORTHWEST AROUND 5 MPH.
HAINES INDEX........2 VERY LOW.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WIND......NORTHWEST 5 TO 10 MPH.
VENTILATION INDEX...300 FAIR.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY...THEN BECOMING MOSTLY CLOUDY.
MIN TEMPERATURE.....38 TO 43.
MAX HUMIDITY........79 TO 84 PERCENT.
WIND - EYE LEVEL....NORTHWEST AROUND 3 MPH IN THE EVENING...THEN LIGHT
                    DOWN SLOPE.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WIND......WEST AROUND 5 MPH.
VENTILATION INDEX...LESS THAN 100 POOR.

.FRIDAY...

SKY/WEATHER.........MOSTLY CLOUDY. A 40 PERCENT CHANCE OF RAIN BY THE
                    EVENING THROUGH MIDNIGHT.
MAX TEMPERATURE.....55 TO 60.
MIN HUMIDITY........32 TO 38 PERCENT.
WIND - EYE LEVEL....WEST 6 TO 9 MPH WITH AFTERNOON GUSTS TO 18 MPH.
HAINES INDEX........2 VERY LOW.
MIXING HEIGHT.......5500 FT AGL.
TRANSPORT WIND......WEST AROUND 15 MPH.
VENTILATION INDEX...825 EXCELLENT.



$$
FORECASTER...REDMAN
REQUESTED BY...DAVE TONEY
TYPE OF REQUEST...PRESCRIBED
.TAG 20091022.5CRRX.01/BOI