037
FXUS65 KMSO 091824
AFDMSO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MISSOULA MT
1224 PM MDT TUE JUN 9 2026
DISCUSSION
KEY MESSAGES:
- COOL, BREEZY AND WET CONDITIONS TODAY THROUGH WEDNESDAY
- ANOTHER FROST POSSIBLE THURSDAY MORNING, ESPECIALLY ALONG AND
SOUTH OF THE INTERSTATE 90 CORRIDOR
TUESDAY: SHOWERS AND THUNDERSTORMS WILL CONTINUE PRODUCING TOTALS
OF 0.10 TO 0.20 INCHES, AT MODERATE RATES. ADDITIONALLY, SOUTHERLY
WINDS 15 TO 35 MPH, WILL SWING WESTERLY BY AFTERNOON. THESE
BACKGROUND WINDS COMBINED WITH ANY SHOWER OR STORM COULD PRODUCE
ERRACTIC OUTFLOWS 35 TO 45 MPH IN ISOLATED CASES.
WEDNESDAY AS THE CORE OF THIS COLD TROUGH MOVES OVER THE REGION
SNOW LEVELS WILL LOWER TO AROUND 6000 FEET. IF YOU HAVE PLANS FOR
BACKCOUNTRY FUN PLAN ACCORDINGLY FOR COLD, WET, AND RAW
CONDITIONS, AVOID HYPOTHERMIA.
THURSDAY MORNING WITH SUFFICIENT CLOUD CLEARING ISOLATED AREAS OF
FROST WILL BE POSSIBLE. THE PROBABILITY OF TEMPERATURES 35F OR
LESS IS 20-30% ALONG THE CONTINENTAL DIVIDE, ESPECIALLY SOUTHWEST
MT AND HIGHER VALLEYS OF NORTH-CENTRAL ID. COLDER POCKETS OF THE
BITTERROOT VALLEY MAY ALSO SEE TEMPERATURES NEAR 35F, 10% OR LESS
PROBABILITY.
ANOTHER WAVE DROPS OUT OF CANADA SATURDAY INTO SUNDAY. DETAILS ON
THIS SYSTEM REMAIN LOW BUT THERE IS SOME CONFIDENCE TEMPERATURES
WILL REMAIN SEASONAL OR JUST SLIGHTLY COOLER THAN NORMAL WITH ONLY
SHORT PERIODS OF LIGHT PRECIPITATION.
AVIATION
SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE THIS
AFTERNOON, THE MAIN THREAT BEING GUSTY AND ERRACTIC OUTFLOW WINDS
30 TO 40 KTS. THE SHOWERS AND THUNDERSTORMS CAPABLE OF THOSE
OUTFLOW WINDS WILL BE ISOLATED AND LESS THAN 10% CHANCE AT KGPI
AND KMSO, UP TO 20% CHANCE AT KSMN AND KBTM. VFR CONDITIONS WILL
DOMINATE TODAY BUT EXPECT BRIEF PERIODS OF MVFR AND IFR DURING
PRECIPITATION EPISODES ALONG WITH MOUNTAIN OBSCURATIONS. PERIODIC
SHOWERS WILL CONTINUE TONIGHT INTO WEDNESDAY. WINDS WILL DIMINISH
IN VALLEYS AFTER SUNSET BUT REMAIN GUSTY ON RIDGETOPS, THEN MIX
BACK DOWN INTO VALLEYS ON WEDNESDAY LATE MORNING/AFTERNOON.
MSO WATCHES/WARNINGS/ADVISORIES
MT...NONE.
ID...NONE.
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