FXUS65 KGGW 251110

AFDGGW



Area Forecast Discussion

National Weather Service Glasgow MT

510 AM MDT Sat Oct 25 2025



.DISCUSSION...



KEY MESSAGES:



- Warm and dry conditions continue today.



- Cold front passage on Sunday will bring breezy conditions and

  scattered rain into Monday. 



WEATHER PATTERN OVERVIEW:



An upper trough off the Pacific Northwest will spin an shortwave

into the northern Rockies today. As the wave moves east, it will

push the ridge over the northern Plains eastward, and send a cold

front across eastern Montana on Sunday morning. While there will

be plenty of moisture pulled onshore by the trough, deep westerly

downslope flow develops quickly behind the front with the forming

of a stacked low over the Canadian prairies by Sunday night. This

will generally limit rain chance to generally with the frontal

passage. Winds will also be increasing with the westerlies, and

will likely reach Lake Wind Criteria for Sunday.



A blocking pattern develops over eastern North America by midweek

while the more active zonal flow across the eastern Pacific will

produce more a volatile pattern to the west. This leads to a 

larger spread and lower confidence for any solution. 



FORECAST CONFIDENCE & DEVIATIONS:



NBM was used for the forecast cycle although added NBM90 to winds

for Sunday. 







&&



.AVIATION...

VFR. High pressure will prevail today amid high clouds at times.

As the cold front approaches the region tonight, clouds will

increase and lower. Winds will turn west to southwest and begin to

increase behind the frontal passage Sunday morning.



&&



.GGW WATCHES/WARNINGS/ADVISORIES...

None.

&&



$$



weather.gov/glasgow