FXUS65 KGGW 241118

AFDGGW



Area Forecast Discussion

National Weather Service Glasgow MT

518 AM MDT Fri Oct 24 2025



.DISCUSSION...



KEY MESSAGES:

- High pressure and mostly sunny skies will prevail through  

  Saturday night.



- Scattered rain and isolated snow chances are possible Sunday 

  into Monday night.



WEATHER PATTERN OVERVIEW:

A weak Rex block pattern with ridge over Montana and upper low in

the 4-corners area will slowly push east through the weekend. This

is in response to the deep low over the Gulf of Alaska

transitioning into western Canada and pushing a trough through the

Pacific Northwest. 



Warm and dry weather continues through Saturday, then the lee

trough in Central Montana will strengthen and be pushed east as a

cold front by the incoming upper trough on Sunday. Intermittent 

light rain is possible just behind the front with the instability 

from cold air advection, but strong westerly downslope flow will 

quickly take over with a stacked low developing over the Canadian

prairies. Temperatures closer to normal and breezy conditions are

expected for early next week. 



FORECAST CONFIDENCE & DEVIATIONS:

No changes were made to the going forecast. Winds potentially will

naturally increase for day 3 and beyond as the frontal system

becomes better defined. Forecast for beyond day 5 has high

uncertainty with large ensemble spread. 



&&



.AVIATION...

VFR. High pressure will be over the area through the TAF cycle. 

Expect beautiful flying weather with mainly clear skies and 

increasing clouds by this weekend.



&&



.GGW WATCHES/WARNINGS/ADVISORIES...

None.

&&



$$



weather.gov/glasgow