298
FNUS75 KBOI 211159
FWSBOI
SPOT FORECAST FOR CZ PILES-BRUSH...USFS
NATIONAL WEATHER SERVICE BOISE ID
559 AM MDT TUE OCT 21 2025
FORECAST IS BASED ON IGNITION TIME OF 0600 MDT ON OCTOBER 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE AT (208)334-9060, IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
..WARMING AND DRYING TREND THROUGH THURSDAY
DISCUSSION
HIGH PRESSURE WILL BUILD OVER THE REGION BRINGING STEADILY WARMER
AND DRIER CONDITIONS THROUGH FRIDAY. WINDS WILL GENERALLY BE
TERRAIN DRIVEN EACH DAY, WITH INCREASING SOUTHERLY WINDS LATER IN
THE WEEK. INVERSIONS WILL BE SLOW TO MIX OUT WITH LOW VENTILATION
INDICES EACH DAY DUE TO LIGHT WINDS ALOFT. A SIGNIFICANT PATTERN
SHIFT WILL OCCUR THIS WEEKEND WITH GUSTY WINDS, COLD TEMPERATURES,
VALLEY RAIN AND MOUNTAIN SNOW.
TODAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....50 TO 56.
MIN HUMIDITY........37 TO 42 PERCENT.
CWR.................0 PERCENT.
WIND - 20 FOOT......SOUTHWEST AROUND 4 MPH.
MIXING HEIGHT.......2000 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 10 MPH.
VENTILATION INDEX...200 FAIR.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY.
MIN TEMPERATURE.....32 TO 37.
MAX HUMIDITY........56 TO 61 PERCENT.
CWR.................0 PERCENT.
WIND - 20 FOOT......NORTHWEST AROUND 5 MPH.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
VENTILATION INDEX...20 POOR.
WEDNESDAY
SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....54 TO 60.
MIN HUMIDITY........33 TO 38 PERCENT.
CWR.................0 PERCENT.
WIND - 20 FOOT......SOUTH AROUND 5 MPH.
MIXING HEIGHT.......2500 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 15 MPH.
VENTILATION INDEX...375 FAIR.
FORECASTER...ADAMS
REQUESTED BY...JONATHAN MILLER
TYPE OF REQUEST...PRESCRIBED
.TAG 2523705.4/BOI
.DELDT 10/21/25
.FORMATTERVERSION 2.0.0
.EMAIL JONATHAN.MILLER@USDA.GOV
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