746
FXUS65 KGGW 221031
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
431 AM MDT Wed Jul 22 2026

.KEY MESSAGES...

- A warming trend through the week will bring triple digit
  temperatures by Friday or Saturday.

- Mainly dry conditions with only an isolated thunderstorm
  Thursday night.

- Drier and breezier conditions Friday and Saturday will increase
  fire weather concerns.

&&

.DISCUSSION...

WEATHER PATTERN OVERVIEW:

An upper ridge over the western states will build into Montana
this week with temperatures warming into Friday. Look for highs
Friday to reach the 90s north to the low 100s south. West winds
will also increase as a surface low passes east to the northeast
of us. If fuels dry out enough, there could be Fire Weather
concerns.

Somewhat lighter winds are expected Saturday but slightly lower
humidities will keep the Fire Weather concerns alive.

Slightly cooler conditions are expected Sunday but not enough to
remove the Fire Weather concerns.

Lighter winds and higher humidity, especially in the northeast
zones should continue to hack away at the Fire Weather concerns
Monday.

FORECAST CONFIDENCE & DEVIATIONS:
Going NBM forecast generally good. Concerned that increasing smoke
aloft could suppress temperatures through the week. While have not
adjusted temperatures, have begun to add haze into the forecast.

&&

.AVIATION...
VFR. While clouds will be clearing the region, smoke from the
Oregon and Canadian fires will be spreading into eastern Montana,
reducing visibility at times through the end of the week.

DENSITY ALTITUDE issues will begin to return to the
terminals Friday through the Weekend.


&&

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

$$

weather.gov/glasgow