Marine Weather and Tide Forecast for Polson, MT
 | Sunrise 5:34 AM Sunset 9:42 PM Moonrise 12:17 AM Moonset 11:19 AM |
7 Day Forecast for Marine Location Near Polson, MT
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FXUS65 KMSO 161730 AFDMSO
Area Forecast Discussion National Weather Service Missoula MT 1130 AM MDT Mon Jun 16 2025
DISCUSSION
KEY MESSAGES:
- Scattered showers/thunderstorms today, mainly west-central and southwest Montana, afternoon/evening hours.
- Trending toward much cooler/increased precipitation chances next weekend.
A mid-level disturbance will help pave the way for showers and thunderstorms across west-central and southwest Montana by this afternoon through the evening. Forecast soundings suggest the best axis of moisture and instability will take shape along the divide in southwest Montana, where brief heavy rain and small hail will accompany stronger thunderstorms. Elsewhere, typical pulse showers and thunderstorms are expected, with brief rain, gusty winds, and lightning being the main hazards.
An overall drying trend is expected Tuesday into Thursday this week under a westerly flow pattern. Temperatures will climb some 5-10 degrees above average each afternoon. Afternoon winds will also be breezier (gusts 25-35 mph), especially Wednesday as the westerly pressure gradient tightens.
In the extended, global ensemble models remain in strong agreement for a large upper level low to bring much cooler temperatures and increased chances for widespread precipitation next weekend (June 21-22). Much will depend on how the trough evolves either as a closed low (20 percent probability) or an open wave (80 percent probability), as the closed low would allow for widespread precipitation and lower snow levels compared to an open wave. Considering it will be late June, it's noteworthy that middle of the road snow levels are forecast at 6500-7000 feet but would be another 1000 to 1500 feet lower if a strong closed low develops. This would open up a potential for impacts to back country users including in Glacier National Park. Gardeners may need to be aware of frost by Monday morning as well, mainly along the Divide.
AVIATION
A mid-level disturbance will help pave the way for showers and thunderstorms across west-central and southwest Montana by this afternoon through the evening. Showers and thunderstorms will form across the higher terrain by 16/1900-2000Z across west- central and southwest Montana, expanding in coverage between 16/2100-17/0200Z. A few stronger storms, capable of producing heavy rain and small hail will focus along the divide, where the best axis of instability is expected.
MSO WATCHES/WARNINGS/ADVISORIES
MT...None.
ID...None.
Area Forecast Discussion National Weather Service Missoula MT 1130 AM MDT Mon Jun 16 2025
DISCUSSION
KEY MESSAGES:
- Scattered showers/thunderstorms today, mainly west-central and southwest Montana, afternoon/evening hours.
- Trending toward much cooler/increased precipitation chances next weekend.
A mid-level disturbance will help pave the way for showers and thunderstorms across west-central and southwest Montana by this afternoon through the evening. Forecast soundings suggest the best axis of moisture and instability will take shape along the divide in southwest Montana, where brief heavy rain and small hail will accompany stronger thunderstorms. Elsewhere, typical pulse showers and thunderstorms are expected, with brief rain, gusty winds, and lightning being the main hazards.
An overall drying trend is expected Tuesday into Thursday this week under a westerly flow pattern. Temperatures will climb some 5-10 degrees above average each afternoon. Afternoon winds will also be breezier (gusts 25-35 mph), especially Wednesday as the westerly pressure gradient tightens.
In the extended, global ensemble models remain in strong agreement for a large upper level low to bring much cooler temperatures and increased chances for widespread precipitation next weekend (June 21-22). Much will depend on how the trough evolves either as a closed low (20 percent probability) or an open wave (80 percent probability), as the closed low would allow for widespread precipitation and lower snow levels compared to an open wave. Considering it will be late June, it's noteworthy that middle of the road snow levels are forecast at 6500-7000 feet but would be another 1000 to 1500 feet lower if a strong closed low develops. This would open up a potential for impacts to back country users including in Glacier National Park. Gardeners may need to be aware of frost by Monday morning as well, mainly along the Divide.
AVIATION
A mid-level disturbance will help pave the way for showers and thunderstorms across west-central and southwest Montana by this afternoon through the evening. Showers and thunderstorms will form across the higher terrain by 16/1900-2000Z across west- central and southwest Montana, expanding in coverage between 16/2100-17/0200Z. A few stronger storms, capable of producing heavy rain and small hail will focus along the divide, where the best axis of instability is expected.
MSO WATCHES/WARNINGS/ADVISORIES
MT...None.
ID...None.
Link to 1 hour of 5 minute data for KGPI
Terminal Aerodrome Forecast (TAF) for KGPI
Wind History Graph: GPI
(wind in knots)
GEOS Local Image of Pacific Northwest
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