579
FXUS65 KGGW 162032
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
232 PM MDT Thu Oct 16 2025

.DISCUSSION...

KEY MESSAGES:

1) Rain, steady at times, will continue tonight with up to an inch
of additional rainfall near the MT/ND border. Look for patchy fog
as well in these areas.

2) Gusty northwest winds will develop on Friday on the backside of
a departing low pressure system. A Lake Wind Advisory has been
issued from 6AM to 9PM Friday.

3) Upper ridging will develop over the region for the weekend with
drier and milder weather conditions.

WEATHER PATTERN OVERVIEW:

A deep trough and upper level low pressure system continues to
lift north and east, spreading rain across eastern Montana and
western North Dakota. Rain will continue, steady at times, with up
to an inch of additional rainfall near the MT/ND border expected.
Look for patchy fog this evening as well with associated low
stratus and rain into a near saturated boundary layer.

Northwest winds will ramp up on the backside of this system to the
tune of 15 to 25 mph with gusts to 40 mph on Friday. A Lake Wind
Advisory is in effect from 6am to 9pm for the Fort Peck Lake area.
Another shortwave could bring light rainfall chances to southwest
portions of the CWA Friday evening.

Upper ridging looks to get underway this weekend for dry and
milder weather before the next trough begins to deepen across the
Pacific Northwest.

FORECAST CONFIDENCE & DEVIATIONS:

NBM was largely used this forecast cycle capturing above average
confidence in cool and wet weather continuing tonight, windy
conditions on Friday, and drier and milder weather over the
weekend. That being said, NBM90 was mixed into the fold for Friday
to nudge toward the higher range of the forecast guidance for wind
speeds. Pressure gradient behind the departing low pressure system
merits anomalously strong winds over the region during that time.



&&

.AVIATION...

LAST UPDATE: Thursday October 16 at 2030Z

FLIGHT CAT RANGE: MVFR - IFR

DISCUSSION: Low pressure will continue to send rain, steady at
times, over area terminals. Low stratus and patchy fog will also
continue to drive reductions in ceiling and visibility tonight.

WIND: Northwest winds will remain between 5 and 15 kts tonight,
ramping up to 10 to 20 kts on Friday with gusts between 30 and 35
kts possible at times.

&&

.GGW WATCHES/WARNINGS/ADVISORIES...
Lake Wind Advisory from 6 AM to 9 PM MDT Friday for Central and
Southeast Phillips-Central and Southern Valley-Garfield-McCone-
Petroleum.

&&

$$

weather.gov/glasgow