609
FXUS65 KMSO 050833
AFDMSO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MISSOULA MT
233 AM MDT TUE AUG 5 2025
DISCUSSION
KEY MESSAGES:
- THE KMSX RADAR (MISSOULA, MT LOCAL WEATHER RADAR) WILL REMAIN
OFFLINE DUE TO SCHEDULED MAINTENANCE THROUGH THE FIRST WEEK OF
AUGUST.
- A BREAK IN THE RAIN TODAY WILL BE FOLLOWED BY A COOL, SHOWERY
END TO THE WEEK.
- A PATTERN CHANGE TO NORTHWEST FLOW AND A BUILDING RIDGE WILL
OCCUR OVER THE WEEKEND.
THE BROAD TROUGH ACROSS THE REGION STARTS TO GET NARROWER TODAY AS
A RIDGE BUILDS INTO THE SOUTHERNMOST PORTIONS OF ALASKA AND
BRITISH COLUMBIA. THAT IN TURN DRIVES A LOW PRESSURE SYSTEM
DIRECTLY OVER CENTRAL IDAHO AND WESTERN MONTANA. CURRENT MODEL
FORECASTS HAVE THE LOW CENTER ARRIVING OVER THE REGION ON
THURSDAY. IN THE MEANTIME, THAT MEANS WE GET A BREAK FROM
THUNDERSTORMS TOMORROW, THEN WEDNESDAY AND THURSDAY THEY RETURN.
AS A RESULT OF THE LOW, TEMPERATURES ON FRIDAY AND SATURDAY WILL
BE 10 DEGREES OR MORE BELOW AVERAGE WITH COOL, SHOWERY CONDITIONS
AND SOME THUNDERSTORMS.
EARLY NEXT WEEK THE BUILDING RIDGE TO THE WEST STARTS TO BROADEN
AND MORE DIRECTLY IMPACT OUR REGION. A PATTERN CHANGE TO HOTTER,
DRIER CONDITIONS UNDER NORTHWEST FLOW SHOULD BE ESTABLISHED MID-
WEEK NEXT WEEK.
AVIATION
RISING HEIGHTS TODAY WILL HELP OFFSET WEAKLY CYCLONIC
FLOW AND A STILL MOIST ENOUGH ATMOSPHERE TODAY WITH THE RESULTING
CONVECTION ONLY AMOUNTING TO CUMULUS CLOUDS THIS AFTERNOON OR SOME
SHOWERS OVER THE MOUNTAINS. TOMORROW AND THURSDAY A TROUGH WILL
CAUSE THUNDERSTORMS TO RETURN.
MSO WATCHES/WARNINGS/ADVISORIES
MT...NONE.
ID...NONE.
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