Terry, Montana Weather Forecast Discussion

443
FXUS65 KGGW 032141
AFDGGW
Area Forecast Discussion
National Weather Service Glasgow MT
341 PM MDT Fri Oct 3 2025
.DISCUSSION...
KEY MESSAGES:
- An upper level trough passing through Montana this weekend will
  bring near to slightly below average daytime temperatures
  through the end of the next week.
- Freezing temperatures 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 continue pushing into Montana tonight bringing cooler
temperatures over the weekend. Nighttime lows below freezing are
expected on Sunday night. The lowest temperatures will be in the
low 20s in northern Philips and Valley counties.
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.
FORECAST CONFIDENCE & DEVIATIONS:
Blended day 1 through day 3 PoP forecast with SREF and HiResWARW.
Confidence remains high for precipitation south of HWY 2 with
increasing confidence in higher PoPs in the southeastern side of
the CWA through Sunday.
&&
.AVIATION...
LAST UPDATE: 2100Z
FLIGHT CAT RANGE: VFR
DISCUSSION: General SW flow aloft will bring varying amounts of
mid and high clouds today and tonight.
WIND: Northerly winds around 8 kts will continue through this
afternoon. A brief push of higher wind speeds up to 15 kts from
23Z to 3Z tonight before becoming light and variable. Northerly
winds return tomorrow.
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