Weather Service Report


358 
FXUS65 KGGW 012039
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
239 PM MDT Tue Jul 1 2025

.DISCUSSION...

KEY MESSAGES:

- Hot conditions remain in place through Thursday, before turning
  cooler for the holiday weekend.
 
- Scattered late afternoon and evening thunderstorms Wednesday 
  will bring potential for strong to severe wind gusts.

- A more active pattern will maintain daily chances for showers
  and thunderstorms into early next week.

WEATHER PATTERN OVERVIEW:

An upper ridge will be building across the region over the next
few days, bringing hot and dry weather through midweek. Wednesday
is expected to be the hottest day, with high temperatures in the 
mid 90s to lower 100s. A Heat Advisory has been maintained for
much of northeast Montana, with potential expansion if the 
50th-75th percentile of the NBM verifies for more widespread 
readings at or above 100. Thursday afternoon looks to be a few 
degrees cooler due to increased cloud cover, but this will limit 
overnight recovery. 

Ensembles show upper ridging sliding east ahead of the next low 
pressure system for the midweek. This will set up a more active 
weather pattern with increased low-level moisture heading into the
4th of July holiday. Daily chances for thunderstorms return in 
the afternoon and evening hours starting Wednesday. The primary
severe threat for Wednesday looks to be focused between 5-11pm for
wind downbursts. Temperatures will begin trending much cooler 
into the weekend with 70s for highs by Saturday.

FORECAST CONFIDENCE & DEVIATIONS:

The NBM was used for the forecast population with minimal 
deviation needed to capture expected trends. Confidence is high on
mainly warm and dry weather through the next couple of days, 
while still medium for the occurrence of widespread triple digit 
heat. Confidence is described as growing on increasing chances for
thunderstorms to return each day starting Wednesday.

&&

.AVIATION...

Flight Category: VFR
 
Discussion: High pressure across the area will mean mostly clear to
partly cloudy skies, with little to no daytime convective 
development through around 21Z Wednesday. 

&&

.GGW WATCHES/WARNINGS/ADVISORIES...
Heat Advisory from 9 AM to 9 PM MDT Wednesday for Central and 
Southeast Phillips-Central and Southern Valley-Dawson-Garfield-
McCone-Northern Phillips-Northern Valley-Petroleum-Prairie-
Southwest Phillips-Western Roosevelt.

&&

$$

weather.gov/glasgow

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Western Regional Climate Center, wrcc@dri.edu