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Libby, Montana 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Libby MT
National Weather Service Forecast for: Libby MT
Issued by: National Weather Service Missoula, MT
Updated: 2:30 pm MDT Jul 10, 2025
 
Tonight

Tonight: Patchy fog after 5am.  Otherwise, mostly clear, with a low around 47. Calm wind.
Mostly Clear
then Patchy
Fog
Friday

Friday: Patchy fog before 8am.  Otherwise, sunny, with a high near 89. Calm wind.
Patchy Fog
then Mostly
Sunny
Friday
Night
Friday Night: Partly cloudy, with a low around 51. Calm wind.
Partly Cloudy

Saturday

Saturday: Sunny, with a high near 93. Calm wind becoming west southwest around 6 mph in the afternoon.
Sunny

Saturday
Night
Saturday Night: Clear, with a low around 55. West wind around 6 mph becoming calm  in the evening.
Clear

Sunday

Sunday: Sunny and hot, with a high near 96.
Hot

Sunday
Night
Sunday Night: Mostly clear, with a low around 58.
Mostly Clear

Monday

Monday: A slight chance of showers after noon.  Mostly sunny, with a high near 90.
Sunny then
Slight Chance
Showers
Monday
Night
Monday Night: A slight chance of showers and thunderstorms.  Mostly cloudy, with a low around 49.
Slight Chance
T-storms then
Slight Chance
Showers
Lo 47 °F Hi 89 °F Lo 51 °F Hi 93 °F Lo 55 °F Hi 96 °F Lo 58 °F Hi 90 °F Lo 49 °F

 

Tonight
 
Patchy fog after 5am. Otherwise, mostly clear, with a low around 47. Calm wind.
Friday
 
Patchy fog before 8am. Otherwise, sunny, with a high near 89. Calm wind.
Friday Night
 
Partly cloudy, with a low around 51. Calm wind.
Saturday
 
Sunny, with a high near 93. Calm wind becoming west southwest around 6 mph in the afternoon.
Saturday Night
 
Clear, with a low around 55. West wind around 6 mph becoming calm in the evening.
Sunday
 
Sunny and hot, with a high near 96.
Sunday Night
 
Mostly clear, with a low around 58.
Monday
 
A slight chance of showers after noon. Mostly sunny, with a high near 90.
Monday Night
 
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 49.
Tuesday
 
Partly sunny, with a high near 80.
Tuesday Night
 
Mostly clear, with a low around 46.
Wednesday
 
Patchy fog. Otherwise, sunny, with a high near 89.
Wednesday Night
 
Clear, with a low around 50.
Thursday
 
Sunny, with a high near 93.

 

Forecast from NOAA-NWS for Libby MT.

Weather Forecast Discussion
940
FXUS65 KMSO 101944
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
144 PM MDT Thu Jul 10 2025

.DISCUSSION...

KEY MESSAGES:

- Warming trend Friday into the weekend, with moderate heat risk
  impacts across low elevations of central Idaho.

- Next system arrives Monday into Tuesday, with potential for
  backdoor cold front, northeast winds, and recreation impacts.

GOES Satellite and radar observations this afternoon show a upper
level disturbance moving across southern Alberta, with scattered
showers across northern portions of Lincoln and Flathead Counties.
Blustery westerly winds have began to surface, with gusts
expected to reach 25-30 mph across valley areas through this
evening across western Montana. Higher gusts near 40 mph have been
observed across high elevations along the divide in northwest
Montana, including Logan Pass in Glacier Park. Showers will
continue through this evening across northwest Montana, focusing
across Glacier Park, with enough moisture and instability being
present for a couple isolated thunderstorms.

A ridge of high pressure will amplify along the Pacific Northwest
coast Friday into the weekend. This will place the Northern
Rockies under a warm and dry west-northwest flow pattern.
Confidence is high for rising temperatures through the weekend,
with highs reaching into the upper-90s to low-100s across lower
elevations of central Idaho. These temperatures will stretch over
the weekend, leading to a moderate risk of heat impacts.
Temperatures will also run 10-15F above normal across western
Montana, with Sunday being the warmest day of the upcoming week.

Ensemble models continue to suggest a breakdown of the ridge
Monday into Tuesday next week as a trough drops southeastward from
British Columbia. Half of ensemble clusters bring a strong
backdoor cold front southward from Canada across the divide
Monday evening into Tuesday morning, with north-northeast winds
developing across western Montana. Guidance has trended towards
this solution, with previous ensemble runs showing a 20% chance
for this solution 12-24 hrs ago. Precipitation will generally
focus along the divide in northwest Montana under this scenario,
with probabilities for >0.10" of precipitation peaking at 50-60%
across Flathead County and the divide. The bottom line is those
with plans across the higher elevations and in Glacier Park
should monitor the forecast closely given the potential for
widespread precipitation, much colder temperatures, and north-
northeast winds making for adverse backcountry conditions for this
time of year. Furthermore, choppy lake conditions across Flathead
Lake would be a concern if this backdoor cold front solution
comes to fruition. We will monitor this system closely in the
coming days.


&&

.AVIATION...GOES Satellite imagery shows a cumulus field along and
north of the I-90 corridor associated with a passing disturbance
along the US-Canadian border. Scattered showers are seen on
regional radar imagery across Lincoln and Flathead County as of
10/1900Z. This activity will continue into the evening, with the
risk of lightning from isolated thunderstorms focusing east of
KGPI over Glacier National Park and the divide. Blustery westerly
winds of 20-25kts will continue through 11/0200-0400Z for valley
areas as this disturbance passes. Skies will clear overnight as
high pressure begins to build into the region.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...None.
ID...None.
&&

$$
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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