973
FXUS65 KGGW 041959
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
159 PM MDT Sat Oct 4 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.

- Gusty NW winds will require a Lake Wind Advisory tonight from
  3AM tonight to 4 PM tomorrow.

- Freezing temperatures Sunday night and Monday morning.
WEATHER PATTERN OVERVIEW:

An upper level trough will continue to dig into western Montana
and push east this weekend bringing cooler temperatures and rain
through tonight. Nighttime lows below freezing are expected on
Sunday night. The lowest temperatures will be in the lower 20s in
northern Philips and Valley counties.

Steady rain is expected this afternoon and tonight mainly along
and south of the Missouri River as the upper trough moves through
the area. 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
80 percent while it will be 10 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.

FORECAST CONFIDENCE & DEVIATIONS:
Blended day 1 PoP forecast with HiResWARW and SREF. Blended day 1
winds with NBM90 and HiResWARW.


&&

.AVIATION...

LAST UPDATE: 1930Z

FLIGHT CAT RANGE: VFR today, a mix of IFR, MVFR, and VFR tonight.

DISCUSSION: Chances for rain increase across the region through
the afternoon. Ceilings and visibility will be VFR this afternoon.
MVFR to IFR ceilings will move over KGDV and KSDY tonight.

WIND: Light and variable early becoming north 5 to 10 knots this
morning increasing to 10 to 20 knots 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