344
FXUS65 KGGW 280642
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
1242 AM MDT Fri Aug 28 2026

.KEY MESSAGES...
- Upper ridging will keep northeast Montana warm today.

- A cold front on Saturday will bring chance for showers and
  thunderstorms.

- Upper low will bring widespread showers with isolated to
  scattered thunderstorm with cooler temperatures Saturday night
  and Sunday.


&&

.DISCUSSION...

WEATHER PATTERN OVERVIEW:

Upper ridge over eastern Montana this morning will move to the
east today. An upper trough/low will move inland from the Pacific
and reach Montana and the Canadian Prairies on Sunday.

Isolated to scattered showers and thunderstorms over northeast
Montana early this morning associated with a weak shortwave will
either diminish or move to the east by 8 am.

Most of the forecast area will be dry and warm today and tonight
will shortwaves staying to the south. Areas along and south of MT
200 could have chances for showers at times.

A wave in the SW flow aloft will bring a cold front through
eastern Montana during the day on Saturday with chance for showers
and thunderstorms that will continue Saturday night.

The upper trough/low moves into Montana on Sunday with cooler
temperatures and showers and thunderstorms. The upper low lifts
into Alberta and Saskatchewan Sunday night and Monday with models
differing where the dry slot versus wrap around precipitation will
be in NE Montana.
FORECAST CONFIDENCE & DEVIATIONS:
Only deviation to NBM was to tweak PoPs today through Saturday.

There is low confidence for chances of any precipitation today
and tonight. Confidence increases during the day on Saturday for
precipitation chances and there is a high confidence of showers
and storms Saturday night and Sunday.



&&

.AVIATION...

LAST UPDATED: 0630Z.

FLIGHT CAT RANGE: VFR.

DISCUSSION: There will be varying amounts of mid and high clouds
today and tonight across the region. An isolated shower or
thunderstorm is possible but confidence of this occurring is low
at this point.

WINDS: SE at 5 to 15 knots early this morning, becoming light and
variable after 11Z, becoming northwest at 5 to 10 knots after 18Z
today. Light and variable winds are expected after 00z Saturday.

&&

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

$$

weather.gov/glasgow