935
FNUS75 KMSO 181424
FWSMSO
SPOT FORECAST FOR TREE FARM
NATIONAL WEATHER SERVICE MISSOULA MT
824 AM MDT MON MAY 18 2026
FORECAST IS BASED ON IGNITION TIME OF 0900 MDT ON MAY 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
A WEAK RIDGE OVER THE REGION TODAY IS CAUSING THE
START OF A MILD WARMING AND DRYING TREND. EVEN WITH THAT, HUMIDITY
AT THE BURN SITE IS NOT EXPECTED TO DROP BELOW 30 PERCENT TODAY.
A COLD AIR MASS OVER THE REGION WILL COMBINE WITH THE INTENSE LATE
MAY SUN ANGLE TO CAUSE AFTERNOON CLOUDS AND SHOWERS. DUE TO THE
RIDGE BUILDING OVER THE AREA, WE EXPECT MINIMAL IMPACTS FROM THE
SHOWERS WITH LOW CHANCES OF A DIRECT HIT FROM A SHOWER AND EVEN IF
ONE DOES HIT THE BURN SITE THIS AFTERNOON RAIN AMOUNTS WILL BE
MINIMAL.
REST OF TODAY
* SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
* CWR (> 0.10 INCH)...LESS THAN 10 PERCENT.
* CHANCE LIGHTNING....20 PERCENT.
* MAX TEMPERATURE.....57-62.
* MIN HUMIDITY........30-40 PERCENT.
* WIND (20 FT)........VARIABLE 1-3 MPH.
* MIXING HEIGHT.......4000 FT AGL.
* MIXING WINDS........WEST 5 MPH.
* PRECIP AMOUNT.......0.00 TO 0.05 INCHES.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF RAIN IN THE
EVENING.
* CWR (> 0.10 INCH)...LESS THAN 10 PERCENT.
* CHANCE LIGHTNING....UP TO 10 PERCENT.
* MIN TEMPERATURE.....36-41.
* MAX HUMIDITY........85-90 PERCENT.
* WIND (20 FT)........VARIABLE 1-3 MPH.
* MIXING HEIGHT.......1000 FT AGL DECREASING TO 500 FT AGL IN THE
LATE EVENING AND OVERNIGHT.
* MIXING WINDS........SOUTH 5 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
TUESDAY
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* CWR (> 0.10 INCH)...10 PERCENT.
* CHANCE LIGHTNING....20 PERCENT.
* MAX TEMPERATURE.....60-65.
* MIN HUMIDITY........44-49 PERCENT.
* WIND (20 FT)........SOUTH 5-7 MPH.
* MIXING HEIGHT.......2500 FT AGL INCREASING TO 5500 FT AGL LATE IN
THE MORNING.
* MIXING WINDS........SOUTHWEST 10 MPH.
* PRECIP AMOUNT.......0.01 INCHES.
FORECASTER...LEACH
REQUESTED BY...JASON KEISTER
TYPE OF REQUEST...PRESCRIBED
.TAG 2613923.0/MSO
.DELDT 05/18/26
.FORMATTERVERSION 2.0.0
.EMAIL JASON.KEISTER@USDA.GOV
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