691
FNUS75 KMSO 042041
FWSMSO
SPOT FORECAST FOR NATURE GROVE - FIRE BEHAVIOR REQUEST
NATIONAL WEATHER SERVICE MISSOULA MT
241 PM MDT FRI SEP 4 2026
FORECAST IS BASED ON FORECAST START TIME OF 0000 MDT ON SEPTEMBER 05.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
LOW PRESSURE SYSTEM OVER THE PACIFIC NORTHWEST WILL
KEEP THE UPPER LEVEL FLOW OUT OF THE SOUTHWEST THROUGH SATURDAY.
THIS FLOW PATTERN WILL CAUSE A SLIGHT WARMING TREND ALONG WITH
PERIODS OF RAIN SHOWERS AND THUNDERSTORMS. THE LOW IS EXPECTED TO
MOVE THROUGH THE REGION SUNDAY INTO MONDAY. MONDAY WILL BE COOLER
AND WET AS STEADY RAINFALL IS EXPECTED FOR THE FIRE AREA. A WEAK
RIDGE OF HIGH PRESSURE BUILDS OVER THE REGION TUESDAY INTO
WEDNESDAY CAUSING A WARMING AND DRYING TREND.
* SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS
IN THE EVENING. RAIN.
* CWR (> 0.10 INCH)...80 PERCENT.
* CHANCE LIGHTNING....20 PERCENT.
* MIN TEMPERATURE.....41-46.
* MAX HUMIDITY........86-91 PERCENT.
* WIND (20 FT)........VARIABLE 1-3 MPH.
* MIXING HEIGHT.......500 FT AGL.
* MIXING WINDS........EAST 5 MPH.
* PRECIP AMOUNT.......0.21 INCHES.
SATURDAY
* SKY/WEATHER.........CLOUDY THEN BECOMING PARTLY CLOUDY. RAIN
LIKELY IN THE MORNING. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON.
* CWR (> 0.10 INCH)...50 PERCENT.
* CHANCE LIGHTNING....25 PERCENT.
* MAX TEMPERATURE.....63-68.
* MIN HUMIDITY........52-57 PERCENT.
* WIND (20 FT)........VARIABLE 1-3 MPH.
* MIXING HEIGHT.......2500 FT AGL INCREASING TO 5500 FT AGL IN THE
AFTERNOON.
* MIXING WINDS........SOUTH 10 MPH.
* PRECIP AMOUNT.......0.17 INCHES.
SATURDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN CHANCE OF
RAIN OVERNIGHT.
* CWR (> 0.10 INCH)...30 PERCENT.
* CHANCE LIGHTNING....20 PERCENT.
* MIN TEMPERATURE.....42-47.
* MAX HUMIDITY........82-87 PERCENT.
* WIND (20 FT)........VARIABLE 1-3 MPH.
* MIXING HEIGHT.......500 FT AGL.
* MIXING WINDS........EAST 5 MPH.
* PRECIP AMOUNT.......0.06 INCHES.
SUNDAY
* SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN IN THE
MORNING, THEN CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON.
* CWR (> 0.10 INCH)...30 PERCENT.
* CHANCE LIGHTNING....25 PERCENT.
* MAX TEMPERATURE.....67-72.
* MIN HUMIDITY........41-46 PERCENT.
* WIND (20 FT)........VARIABLE 1-3 MPH.
* MIXING HEIGHT.......2500 FT AGL INCREASING TO 5000 FT AGL IN THE
AFTERNOON.
* MIXING WINDS........SOUTH 5 MPH.
* PRECIP AMOUNT.......0.06 INCHES.
FORECAST DAYS 3 THROUGH 7
LABOR DAY
SUNDAY
MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS
42-47. HIGHS 64-69. MIN RH 50-60%. WINDS GENERALLY LESS THAN 5
MPH.
LABOR DAY
COOLER. SHOWERS AND CHANCE OF THUNDERSTORMS. LOWS 42-47. HIGHS
49-54. MIN RH 60-70%. VARIABLE WINDS UP TO 10 MPH.
TUESDAY
PARTLY CLOUDY WITH CHANCE OF RAIN. LOWS 38-43. HIGHS 59-64.
MIN RH 40-50%. SOUTHWEST WINDS 5-12 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 40-45. HIGHS 66-71. MIN RH 30-40%. WEST WINDS
AROUND 5 MPH.
THURSDAY
PARTLY CLOUDY WITH SLIGHT CHANCE FOR SHOWERS. LOWS 45-50. HIGHS
67-72. MIN RH 35-45%. SOUTHWEST WINDS 5-10 MPH
OUTLOOK FOR FRIDAY SEPTEMBER 11 THROUGH THURSDAY SEPTEMBER 17
AN ACTIVE WEATHER PATTERN IS EXPECTED FOR THE FAR EXTENDED WITH
TEMPERATURES BEING NEAR SEASONAL READINGS WITH A HIGHER
PROBABILITY OF ABOVE NORMAL PRECIPITATION.
FORECASTER...SMITH
REQUESTED BY...CLINT MENDENHALL
TYPE OF REQUEST...WILDFIRE
.TAG 2621219.0/MSO
.DELDT 09/04/26
.FORMATTERVERSION 2.0.0
.EMAIL ERIN.NOONAN@USDA.GOV,MARIO.GOMEZ@USDA.GOV,DAVID.TINGLEY@USDA.GOV,SCOTT.A.SUKO@USDA.GOV,CLINT.MENDENHALL@USDA.GOV
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