Vandalia, Montana Weather Forecast Discussion

239
FXUS65 KGGW 030825
AFDGGW
Area Forecast Discussion
National Weather Service Glasgow MT
225 AM MDT Fri Oct 3 2025
.DISCUSSION...
KEY MESSAGES:
- Today will be mainly dry across the region while areas of light
  rain overnight diminishes around sunrise this morning.
- A slow moving cold front will pass through NE Montana today and
  tonight. Freezing temperatures likely Sunday night and Monday
  morning.
- Rain is expected late tonight through Sunday morning. Most of
  the rain will be south of the Missouri River
WEATHER PATTERN OVERVIEW:
A cold front will move slowly across NE Montana today and tonight
which will bring cooler temperatures over the weekend. Freezing
temperatures are likely Sunday night and Monday morning.
A shortwave on SW flow aloft moves into the forecast area Saturday
morning. Chances for light rain will start in some areas tonight
but the main area of rain with this system is expected Saturday
and Saturday night with a upper trough over Montana. Most of the
rain with this system will be south of the Missouri River where
the probability of 0.25 inch of rain is 40 to 70 percent while it
will be 20 percent or less near the Canadian Border.
Chances for light rain will linger into Sunday morning south of
the Missouri River. Then, skies will clear Sunday afternoon as
high pressure moves into the area. Gusty NW winds may be high
enough to require a Lake Wind Advisory on Sunday.
Clear skies and light winds Sunday night will allow for below
freezing temperatures in most areas and some areas especially
north of the Missouri River will have a hard freeze with low below
28 degrees.
Temperatures gradually warm back up next week as trough moves to
the east and ridge builds into the area from the west.
FORECAST CONFIDENCE & DEVIATIONS:
No deviations from NBM in the forecast.
Confidence is high south and low north for precipitation Saturday
and Saturday night.
&&
.AVIATION...
LAST UPDATE: 0820Z
FLIGHT CAT RANGE: VFR
DISCUSSION: General SW flow aloft will bring varying amounts of
mid and high clouds today and tonight.
WIND: A low pressure system today will cause variable wind speeds
and directions today across the region. North to NE winds around
10 knots are expected tonight.
EQUIPMENT: At KSDY an AMD NOT SKED will remain in place
until the METARs comms issue is repaired.
&&
.GGW WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$
weather.gov/glasgow

NWS GGW Office Area Forecast Discussion