FNUS75 KBOI 202223
FWSBOI

SPOT FORECAST FOR YELLOW PINE RX...BOISE NF
NATIONAL WEATHER SERVICE BOISE ID
423 PM MDT WED OCT 20 2010

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON OCTOBER 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...DRY AND STABLE TOMORROW WITH SEASON ENDING EVENT THIS WEEKEND...

.DISCUSSION...A RIDGE OF HIGH PRESSURE WILL REMAIN IN CONTROL THROUGH
TOMORROW AFTERNOON WITH DRY CONDITIONS AND LIGHT SLOPE DRIVEN WINDS.
INCREASING HIGH CLOUDS AND A CHANCE OF RAIN ARE POSSIBLE AS EARLY AS
FRIDAY AFTERNOON AND SATURDAY WITH AN INITIAL SURGE OF MOISTURE THAT
WILL BEGIN TO BREAK DOWN THE HIGH PRESSURE. A MUCH STRONGER WEATHER
SYSTEM WILL MOVE IN ON SUNDAY FOR WIDESPREAD WETTING RAIN AND MOUNTAIN
SNOW...ALONG WITH GUSTY RIDGETOP WINDS OF AT LEAST 40 MILES PER HOUR.

.THURSDAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 75.
MIN HUMIDITY........20 TO 24 PERCENT.
WIND - EYE LEVEL....UPSLOPE EAST TO SOUTHEAST 3 TO 6 MPH.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......3000 FT AGL.
TRANSPORT WIND......SOUTHWEST 5 TO 10 MPH.
VENTILATION INDEX...300 FAIR.

.THURSDAY NIGHT...

SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....33 TO 35.
MAX HUMIDITY........70 TO 75 PERCENT.
WIND - EYE LEVEL....DOWNSLOPE 3 TO 6 MPH. BECOMING DOWNCANYON AFTER 2100.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WIND......SOUTH AROUND 5 MPH.
VENTILATION INDEX...20 POOR.

.OUTLOOK FOR FRIDAY...

SKY/WEATHER.........PARTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS.
MAX TEMPERATURE.....68 TO 73.
MIN HUMIDITY........25 TO 35 PERCENT.
WIND - EYE LEVEL....UPSLOPE EAST TO SOUTHEAST 3 TO 6 MPH.
HAINES INDEX........3 VERY LOW.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WIND......SOUTHWEST 5 TO 15 MPH.
VENTILATION INDEX...400 FAIR.


$$
FORECASTER...DECKER
REQUESTED BY...PAYETTE NATIONAL FOREST
TYPE OF REQUEST...PRESCRIBED
.TAG 20101020.YELLO.02/BOI