144
FXUS65 KGGW 272029
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
229 PM MDT Fri Jun 27 2025

.DISCUSSION...

KEY MESSAGES:

1) Isolated to scattered showers and thunderstorms are possible
again this afternoon and evening.

2) Lake Wind Advisory in effect for Saturday.

3) Increasing high pressure will bring calm, warm and dry weather
conditions to the region this weekend.

4) Expect thunderstorms to return by the middle of next week with
a more active weather pattern.

WEATHER PATTERN OVERVIEW:

Just enough instability and weak forcing for ascent is present to
allow for some hit-or-miss thunderstorms this afternoon and
evening. The main threat is severe wind gusts, but small hail,
heavy rain, and frequent lightning are also possible. Most of this
activity is expected to remain near and south of the Missouri
River.

Tonight through Saturday, some leftover light rain will move
through a few locations, but are not expected to amount to much
more than a passing sprinkle. Widespread gusty west winds up to 30
mph set up Saturday morning across the region. A Lake Wind
Advisory has been issued for the hours of 8 AM to 9 PM on
Saturday.

Early next week, confidence continues to increase in a
strengthening ridge of high pressure from the south, bringing
plenty of sunshine and warming temperatures with no storms. Then,
During the latter half of next week, the weather pattern turns
more active with the return of thunderstorms thanks to a new low
pressure system from the west.

FORECAST CONFIDENCE & DEVIATIONS:

Deviated from NBM to provide more details surrounding the expect
thunderstorms and gusty winds today through tonight. Kept NBM for
Day 3 and beyond.

Forecast confidence is high for temperatures, and average for
thunderstorm chances today through tonight. Average to low
confidence in exact placement and timing of individual storm
cells.


&&

.AVIATION...

Last Updated: June 27, 2025 at 2028Z.

Flight Category: Mainly VFR.

Discussion: Partly to mostly cloudy skies are expected today,
though isolated showers and thunderstorms should remain mostly
away from area terminals through at least the afternoon. A stray
shower or thunderstorm might approach the TAF sites beginning at
22Z this afternoon.

Winds: From the west or northwest at 10 to 15 kts this afternoon
and evening. Winds could become erratic and gusty near the
stronger storms.



&&

.GGW WATCHES/WARNINGS/ADVISORIES...
Lake Wind Advisory from 8 AM to 9 PM MDT Saturday for Central
and Southeast Phillips-Central and Southern Valley-Garfield-
McCone-Petroleum.

&&

$$

weather.gov/glasgow