Wagner, Montana Weather Forecast Discussion

572
FXUS65 KGGW 202252
AFDGGW
Area Forecast Discussion
National Weather Service Glasgow MT
452 PM MDT Sat Sep 20 2025
.DISCUSSION...
KEY MESSAGES:
1) Above average temperatures and dry conditions remain though
the weekend before a cold front moves in by Sunday evening.
2) Gusty winds associated with the frontal boundary may require
issuance of a Lake Wind Advisory on Sunday night.
WEATHER PATTERN OVERVIEW:
An upper level ridge will continue to build over the region
through this afternoon through Sunday bringing above average
temperatures. By Sunday night a cold front will move through the
area bringing near average temperatures on Monday and Tuesday.
Monday`s chances for rain across northeastern most Montana are
low, but increase in central and southern Montana. Rain totals are
expected to remain below 0.01" west of HWY 24. Convection is
possible with localized thunderstorms producing greater than 0.10"
in some areas mostly in or near central Montana. At this moment
there is moderate confidence a Lake Wind Advisory will be
necessary for Fort Peck Lake on Monday with the passing of the
cold front.
By Tuesday another upper level ridge will begin building bringing
temperatures up. An omega block pattern is beginning to take
shape late next week, with lows centered off the coast of
California and over the Ohio Valley. Depending on how quickly
these two lows move, Montana will remain warm and dry.
FORECAST CONFIDENCE & DEVIATIONS:
Winds were increased manually for Day 2. Forecast confidence is
high for warm and dry conditions through the weekend. Confidence
in exact timing is moderate but the strength of the cold front
boundary is low to moderate.
&&
.AVIATION...
UPDATE: 2245Z, September 20th
FLIGHT CAT RANGE: VFR
DISCUSSION: Clear skies and light winds continue through tonight.
Dry conditions will continue through 12Z Monday before a cold
front brings gusty winds and chances for rain.
WIND: South winds will remain steady between 5 and 10 kts before
becoming variable briefly at 12Z. Southerly winds will return by
15Z and beginning veering west through the end of the TAF period.
EQUIPMENT: KSDY AMD NOT SKED will remain in place until METARs
comms issue is repaired.
&&
.GGW WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$
weather.gov/glasgow

NWS GGW Office Area Forecast Discussion