Circle, Montana Weather Forecast Discussion

928
FXUS65 KGGW 261935
AFDGGW
Area Forecast Discussion
National Weather Service Glasgow MT
135 PM MDT Fri Sep 26 2025
.DISCUSSION...
KEY MESSAGES:
- Gusty NW winds continue today behind a cold front with a Lake
  Wind Advisory in effect for Fort Peck Lake.
- Warming trend begins soon after, with the warmest days being
  Sunday and Monday. Then more cooling starts Tuesday.
- Models are pointing towards some precipitation chances starting
  Tuesday night and continuing for a few days.
WEATHER PATTERN OVERVIEW:
A shortwave trough from the Canadian Rockies this morning has
brought gusty winds and cooler temperatures to our region. As a
result, the ridge of high pressure will be temporarily flattened
or moved southward. This NE Montana cold front has moved through
the area and widespread sustained NW winds of 25 to 30 mph and
some gusts in excess of 45 mph have been observed across most of
the area. The Lake Wind Advisory remains in effect for Fort Peck
Lake today until 6 pm. Winds will quickly diminish to near calm by
sunset this evening.
Later on Saturday, the ridge ridge of high pressure rebounds
northward supporting calm winds and above normal temperatures
through early next week.
Beginning Tuesday, the weather pattern becomes more active and
unstable with SW flow aloft and Pacific moisture combining with
short wave disturbances riding up and over the Rocky Mountains.
Initially on Tuesday, most of the rainfall will be focused over
the higher elevations of the Rockies, but as the low pressure
continues moving eastward by Tuesday evening, some scattered
light rain showers can be expected for parts of eastern Montana as
well, continuing through Wednesday.
Models fall out of line with each other later next week, lowering
confidence for any chances for rain until we see more model
consistency and alignment.
FORECAST CONFIDENCE & DEVIATIONS:
Increased winds with a mix of hi-res models to better represent
this cool front today.
Confidence in temperature forecast is high.
Confidence in rain forecast chances next week is average to below
average
&&
.AVIATION...
UPDATED: 1930Z, Friday, Sept. 26.
FLIGHT CONDITIONS: VFR.
DISCUSSION: The cool front has moved SE through the area today,
but gusty NW are still persist behind the front and will not
subside until near sunset this evening. This low pressure
influence from the north will temporarily shove high pressure
further to the south. Expect high pressure to rebound northward
later on Saturday.
WINDS: Today from the NW around 20 kts and gusts in excess of 30
kts. This evening, quickly diminishing to light and variable if
not calm. Saturday, from the S and SW around 10 to 15 kts.
EQUIPMENT: KSDY AMD NOT SKED will remain in place until the METARs
comms issue is repaired.
&&
.GGW WATCHES/WARNINGS/ADVISORIES...
Lake Wind Advisory until 6 PM MDT this evening for Central and
Southeast Phillips-Central and Southern Valley-Garfield-McCone-
Petroleum.
&&
$$
weather.gov/glasgow

NWS GGW Office Area Forecast Discussion