529 

FXUS65 KGGW 282046

AFDGGW



Area Forecast Discussion

National Weather Service Glasgow MT

246 PM MDT Sun Jun 28 2026



.KEY MESSAGES...

- Most of the active weather has been winding down today.



- Unsettled conditions remain most of this week with scattered

  showers/thunderstorms.



&&



.DISCUSSION...

WEATHER PATTERN OVERVIEW:

The upper low that moved in that gave the area scattered severe

thunderstorms and flash flooding has generally moved north into

Canada. Scattered showers remain across the CWA and into central

Montana. Temperatures coolest over the NW zones which are closer 

to the low pressure, steadier showers and clouds.



The vertically stacked low over southern Alberta, Sask and

northern Montana will remain over the area but is expected to

gradually lift into south-central Canada midweek. This will allow

for a windy day Tuesday, probably enough for a Lake Wind 

Advisory.



An upper trough will remain in place over western Canada for the

remainder of the week that will keep the threat of scattered

showers/storms going across northeast Montana. With a hot airmass

just to our south, wouldn't be surprised if some of these are 

severe with large hail and/or damaging wind.



Late in the period, the models try to bring an upper ridge in here

that would bring hotter and drier conditions but the confidence is

low at this point.



FORECAST CONFIDENCE & DEVIATIONS:

No changes to the default/NBM forecast were made today. TFJ



&&



.AVIATION...

UPDATED: 2045z Sunday June 28th



FLIGHT CATEGORY: VFR/MVFR



Clouds and showers will continue to spin counter-clockwise around

an area of low pressure centered just north of Havre. Most of the

ceilings through 18z Monday will be VFR but will lower to MVFR in

heavier showers. An area of MVFR ceilings will also move into the

KSDY airspace Monday morning. TFJ



&&



.HYDROLOGY...



Updated: Sunday June 28th



Rainfall over the past several days seems to have caused very

little impact over the area as of today. Flood Advisory for most

of Phillips and NW Valley counties were allowed to expire at 2 pm.

Otherwise, a Flood Advisory for Daniels expires at 6 pm and the 

Flood Advisory for central Garfield county expires at 8 pm.



The Frenchmen River along the Canadian border had risen recently

but has remained nearly steady below Action stage. TFJ





&&



.GGW WATCHES/WARNINGS/ADVISORIES...

Lake Wind Advisory until 2 AM MDT Monday for Central and 

Southeast Phillips-Central and Southern Valley-Garfield-McCone-

Petroleum.



&&



$$



weather.gov/glasgow