Antelope, Montana Weather Forecast Discussion

303
FXUS65 KGGW 210824
AFDGGW
Area Forecast Discussion
National Weather Service Glasgow MT
224 AM MDT Sun Sep 21 2025
.DISCUSSION...
KEY MESSAGES:
1) Above average temperatures, dry conditions, and areas of smoke
before a cold front moves in tonight to bring rain chances.
2) A Lake Wind Advisory has been issued for gusty winds late tonight
into Monday.
3) An upper ridge will move in on Tuesday to allow temperatures to
rise and winds to come down. Little to no precipitation is expected
through the end of the week.
WEATHER PATTERN OVERVIEW:
An upper level ridge will be in place today briefly, and northwest
winds aloft will bring brief wildfire smoke in from Canada through
late this evening. A cold front will move in on Sunday night into
Monday to bring temperatures closer to average. Areas west of HWY
24 are the most likely areas to see rain, with high confidence of
rainfall remaining below a tenth of an inch through Monday night. Then
upper ridging is forecast for the foreseeable future.
FORECAST CONFIDENCE & DEVIATIONS:
Increased Day 1 and Day 2 winds with a combination of NBM and NBM
90. Forecast confidence is described in the discussion above.
&&
.AVIATION...
UPDATE: 0245Z, September 21
FLIGHT CAT RANGE: VFR
DISCUSSION: Clear skies and light winds continue through tonight.
Dry conditions will continue and areas of smoke will move through
today. On Sunday night, a cold front will bring gusty winds and
chances for rain. The rain chances are mainly for KGGW and KOLF.
WIND: For KGGW, southeast at 6 to 12 kts, becoming west northwest
at 10 to 15 knots after 18Z. For all other sites, light and
variable becoming west southwest at 10 to 15 knots after 18Z.
EQUIPMENT: KSDY AMD NOT SKED will remain in place until METARs
comms issue is repaired.
&&
.GGW WATCHES/WARNINGS/ADVISORIES...
Lake Wind Advisory from midnight tonight to 6 PM MDT Monday for
Central and Southeast Phillips-Central and Southern Valley-
Garfield-McCone-Petroleum.
&&
$$
weather.gov/glasgow

NWS GGW Office Area Forecast Discussion