Shelby, Montana 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for Shelby MT
National Weather Service Forecast for:
Shelby MT
Issued by: National Weather Service Great Falls, MT |
Updated: 1:35 pm MDT Mar 30, 2025 |
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This Afternoon
 Partly Sunny
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Tonight
 Mostly Cloudy
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Monday
 Cloudy then Chance Rain/Snow
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Monday Night
 Chance Rain then Slight Chance Rain/Snow
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Tuesday
 Chance Rain/Snow then Chance Rain
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Tuesday Night
 Slight Chance Rain then Mostly Cloudy
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Wednesday
 Slight Chance Snow then Chance Rain
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Wednesday Night
 Chance Rain/Snow then Chance Snow
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Thursday
 Chance Snow
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Hi 35 °F |
Lo 25 °F |
Hi 45 °F |
Lo 30 °F |
Hi 47 °F |
Lo 29 °F |
Hi 45 °F |
Lo 25 °F |
Hi 38 °F |
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This Afternoon
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Partly sunny, with a high near 35. East southeast wind 7 to 10 mph. |
Tonight
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Mostly cloudy, with a low around 25. East southeast wind 8 to 10 mph. |
Monday
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A slight chance of snow before 1pm, then a slight chance of rain and snow between 1pm and 3pm, then a chance of rain after 3pm. Mostly cloudy, with a high near 45. East southeast wind 7 to 10 mph. Chance of precipitation is 30%. Little or no snow accumulation expected. |
Monday Night
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A chance of rain before 3am, then a slight chance of rain and snow. Mostly cloudy, with a low around 30. Southeast wind 5 to 7 mph becoming light and variable. Chance of precipitation is 30%. Little or no snow accumulation expected. |
Tuesday
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A chance of rain and snow before noon, then a chance of rain. Mostly cloudy, with a high near 47. North northwest wind 6 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 40%. Little or no snow accumulation expected. |
Tuesday Night
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A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 29. West northwest wind 6 to 10 mph. |
Wednesday
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A slight chance of snow before noon, then a chance of rain. Partly sunny, with a high near 45. Northwest wind 7 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. Little or no snow accumulation expected. |
Wednesday Night
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A chance of rain and snow before 9pm, then a chance of snow. Mostly cloudy, with a low around 25. North wind 9 to 11 mph. |
Thursday
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A chance of snow. Mostly cloudy, with a high near 38. |
Thursday Night
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A slight chance of snow before midnight. Mostly cloudy, with a low around 22. |
Friday
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Mostly sunny, with a high near 45. |
Friday Night
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Partly cloudy, with a low around 25. |
Saturday
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Mostly sunny, with a high near 54. |
Forecast from NOAA-NWS
for Shelby MT.
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Weather Forecast Discussion
666
FXUS65 KTFX 301945
AFDTFX
Area Forecast Discussion
National Weather Service Great Falls MT
145 PM MDT Sun Mar 30 2025
.KEY MESSAGES...
- Spring storm to affect the southern half of the CWA Monday night
into Tuesday night.
- Overall, afternoon temperatures not as warm as last week through
at least Friday.
- Next weekend is looking nicer and a bit warmer.
&&
.DISCUSSION...
- Meteorological Overview:
A few light snow showers/flurries continue to linger over portions
of the CWA this afternoon, as the upper level disturbance exits
the CWA to our east. The next upper level disturbance arrives on
Mon afternoon, with a chance for showers/isolated thunderstorms as
it moves northward from Southwest MT into Central MT. On Monday
night, a stronger upper level trof will move over the southern
portions of the CWA, with strong convective bands of precipitation
possible. These convective bands could produce some good snowfall
rates in the mountains. Thus a winter storm watch has been issued
for some mountain ranges of Central and Southwest MT. It is likely
that some winter weather advisories will also be needed for areas
surrounding the winter storm watch as well.
Overall, the steadier precipitation ends Tuesday night over
Southwest MT, with scattered rain/snow showers then continuing
into Friday. However, the precipitation will become more isolated
Thu/Fri. Afternoon temperatures will generally be below normal for
much of the CWA through the work week.
Looking ahead to next weekend, an upper level ridge of high
pressure will try to build into the CWA from the west, resulting
in drier/warmer conditions moving back into the CWA by next
Sunday.
- Forecast Confidence & Scenarios:
The main concern is the snowfall potential Mon night into Tuesday
over Central and Southwest MT. There is a 60 percent chance
snowfall could exceed 6 inches in the mountains. Additionally,
there is a 10 percent chance snow amounts could exceed a foot.
This potential has lead to a winter storm watch for some mountain
areas of Central/Southwest MT. There is the potential for some
higher snowfall amounts in the Elkhorn Mountains as well, but with
no mountain passes directly affected by the higher snowfall
amounts, no watch will be issued at this time.
Of second concern, is the GFS model that has lower levels and
some convective snowfall in the Helena and Bozeman areas. This
potential will be watched closely as higher resolution models
become available for the possible need to expand the winter storm
watch. Brusda
&&
.AVIATION...
30/18Z TAF Period
The initial concern this TAF period is for lingering light snow
and low clouds. Remaining snow is forecast to diminish this
afternoon, with ceilings slowly rising in most areas. Additional
low clouds will be a concern this evening and tonight, mostly
across the plains, but in some southwest MT valleys as well. Fog
will be a concern where skies at least briefly clear a bit tonight
on the plains. -AM
Refer to weather.gov/zlc for more detailed regional aviation
weather and hazard information.
&&
.PRELIMINARY POINT TEMPS/POPS...
GTF 27 49 33 46 / 0 40 60 60
CTB 25 44 29 47 / 0 30 20 30
HLN 30 50 32 44 / 10 60 60 60
BZN 26 49 27 40 / 10 50 60 70
WYS 22 40 19 36 / 70 70 70 80
DLN 27 46 28 38 / 10 40 50 50
HVR 24 50 29 46 / 0 20 30 40
LWT 25 47 28 39 / 10 40 60 70
&&
.TFX WATCHES/WARNINGS/ADVISORIES...
Winter Storm Watch from Monday evening through Tuesday evening
for Big Belt, Bridger and Castle Mountains-Gallatin and Madison
County Mountains and Centennial Mountains-Little Belt and
Highwood Mountains.
&&
$$
http://www.weather.gov/greatfalls
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