FXUS65 KGGW 201845

AFDGGW



Area Forecast Discussion

National Weather Service Glasgow MT

1245 PM MDT Fri Mar 20 2026



.KEY MESSAGES...

- Elevated grass fire concerns through this evening.



- Lower temperatures this weekend with light rain shower chances

  across central and parts of northern Montana.



- Mild conditions next week with low end chances for another 

  weather system after midweek.

  

&&



.DISCUSSION...



WEATHER PATTERN OVERVIEW: 



A final warm day is expected over NE Montana today. Isolated rain

showers and breezy conditions will continue through the evening.

With relative humidity ranging from the low 20s to mid 40s and

rain that falls will have to saturate the air sufficiently in

order to reach the ground. Grass fire potential remains a concern

today, but marginally. Dry fuels and low RH are the main factors

today. As for precipitation tomorrow, model agreement is high for

light rain in the afternoon. Little to no accumulation is 

expected both today and tomorrow.



Ensembles show upper ridging returning across the western U.S. for

early next week with dry weather and warming temperatures again.

That said, embedded shortwaves and ridge flattening toward the

middle of the week will keep the warm up short lived and rain

shower chances remaining active across the region. 



FORECAST CONFIDENCE & DEVIATIONS:



Blended HRRR for day 1-2 winds and NBM90 for day 1-2 wind gusts.

Used a blend of HiRes models to nudge min RH values lower in

southwest zones and maintain moderate RH in the northeast zones.



&&



.AVIATION...



LAST UPDATE: Friday March 20 at 1800Z



FLIGHT CATEGORY: VFR



DISCUSSION: VFR conditions through the TAF cycle. Scattered, 

brief rain showers are possible through the afternoon.



WIND: West at 10 to 20 kts, decreasing to 5 to 10 kt tonight.

Winds increase back to 20 to 20 kts and veer north tomorrow.





&&



.GGW WATCHES/WARNINGS/ADVISORIES...

None.

&&



$$



weather.gov/glasgow