085
FNUS75 KBOI 210957
FWSBOI
SPOT FORECAST FOR WILLIAMS CREEK RX...FOREST SERVICE
NATIONAL WEATHER SERVICE BOISE ID
357 AM MDT THU OCT 21 2021
FORECAST IS BASED ON IGNITION TIME OF 0700 MDT ON OCTOBER 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
..WARMER AND DRIER TODAY
..RAIN WITH GUSTY WINDS FRIDAY
DISCUSSION
BRIEF HIGH PRESSURE WILL BRING WARM AND DRY CONDITIONS TODAY
WITH PASSING CLOUDS. A LOW PRESSURE SYSTEM WILL APPROACH FRIDAY
MORNING AND BRING A SLIGHT CHANCE OF SHOWERS IN THE MORNING.
THEN, RAIN WILL BE LIKELY IN THE AFTERNOON AND EVENING
ASSOCIATED WITH THE COLD FRONT. WINDS WILL BE GUSTY FRIDAY
AFTERNOON, AND WILL SHIFT FROM SOUTHERLY TO WESTERLY. SNOW
LEVELS WILL LOWER TO AROUND 6000 FT MSL BY FRIDAY NIGHT AS
PRECIPITATION IS ENDING.
TODAY
SKY/WEATHER.........PARTLY CLOUDY.
MAX TEMPERATURE.....60 TO 65. WARMER THAN WED.
MIN HUMIDITY........35 TO 40 PERCENT.
CWR /0.10 INCH/.....0 PERCENT.
WIND - EYE LEVEL....SOUTHERLY 5 TO 7 MPH. GUSTS TO 14 MPH IN THE
AFTERNOON.
MIXING HEIGHT.......4500 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 15 MPH.
HAINES INDEX........2 VERY LOW.
VENTILATION INDEX...675 GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY IN THE EVENING, THEN MOSTLY
CLOUDY WITH A 20 PERCENT CHANCE OF RAIN AFTER
MIDNIGHT.
MIN TEMPERATURE.....46 TO 51.
MAX HUMIDITY........65 TO 70 PERCENT.
CWR /0.10 INCH/.....10 PERCENT.
WIND - EYE LEVEL....EAST-SOUTHEAST AROUND 4 MPH.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH.
HAINES INDEX........2 VERY LOW.
VENTILATION INDEX...25 POOR.
FRIDAY
SKY/WEATHER.........A 20 PERCENT CHANCE OF RAIN IN THE MORNING, THEN
RAIN LIKELY IN THE AFTERNOON. CHANCE OF RAIN
INCREASING TO 80 PERCENT. SNOW LEVEL 9KFT MSL
FRIDAY MORNING, LOWERING TO AROUND 6KFT MSL
FRIDAY NIGHT.
MAX TEMPERATURE.....59 TO 64.
MIN HUMIDITY........34 TO 39 PERCENT.
CWR /0.10 INCH/.....40 PERCENT.
WIND - EYE LEVEL....SOUTHEAST 4 TO 6 MPH IN THE MORNING. THEN,
SOUTHWEST TO WEST 6 TO 9 MPH WITH GUSTS TO
AROUND 18 MPH AFTER NOON. BRIEF PERIODS OF
HIGHER GUSTS OVER 20 MPH POSSIBLE IN THE
LATE AFTERNOON WITH COLD FRONT.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 15 MPH.
HAINES INDEX........3 VERY LOW.
VENTILATION INDEX...600 GOOD.
FORECASTER...HENRY
REQUESTED BY...SHANE KELLEY
TYPE OF REQUEST...PRESCRIBED
.TAG 2119847.0/BOI
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