358
FXUS65 KGGW 271903
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
103 PM MDT Wed Aug 27 2025

.DISCUSSION...
KEY MESSAGES:

- Some monsoonal moisture will drift into NE Montana on Thursday
  afternoon through Saturday bringing a chance of showers,
  possibly a thunderstorm. Best chances over central and southern
  zones.

- Cold front sweeps in early next week (Monday night/Tuesday),
  bringing north winds and the chance for some showers.

WEATHER PATTERN OVERVIEW:

Upper ridge over Montana today being shrouded with monsoonal
moisture. Water vapor showing it finally reaching the CWA with
scattered showers over southern and SW Montana.

Clouds will increase tonight with the chance of showers to move
into the CWA Thursday evening. The northern zones have a high
chance (60-80%) of staying dry while better chances are expected
Friday night over the central and southern zones.

System gradually moves out Saturday with a return to warmer
conditions into Monday.

A cold front drops south into the area Monday night or Tuesday
that will bring the chance of showers and north winds.

FORECAST CONFIDENCE & DEVIATIONS:
Main adjustment was with winds late Monday night through Tuesday
evening as NBM wasn`t strong enough with the cold front moving in.
Future adjustments, such as raising pops may be needed. Rest of
the NBM numbers looked good. TFJ

&&

.AVIATION...
UPDATED: 1930Z

FLIGHT CAT: VFR.

DISCUSSION: Quiet weather with high clouds increasing into
Thursday.

WINDS: east winds at 10 kts or less tonight then southeast 10-15
Thursday. TFJ

&&

.GGW WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

weather.gov/glasgow