110
FXUS65 KGGW 241941
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
Issued by National Weather Service Billings MT
141 PM MDT Sat May 24 2025

.DISCUSSION...

KEY MESSAGES:
   - Scattered showers this afternoon near Fort Peck Lake will
     gradually diminish tonight.
   - Expect a slow warming trend through next weekend with isolated
     showers possible.

WEATHER PATTERN OVERVIEW:
Not much change to the going forecast with this afternoon/s
package. Upper ridge still expected to build in, centered over
central Montana into early next week. This will allow temperatures
to gradually warm into next weekend with highs next week
generally in the 70s.

In the meantime, scattered showers and isolated thunderstorms can
be expected near Fort Peck Lake this evening but diminishing with
the loss of daytime/diurnal heating. Patchy fog may develop in some
areas by Sunday morning.

Most of the shower activity Sunday and Monday will stay south of the
CWA. On Tuesday, an upper trough that moves east from the Pacific
NW will help trigger widespread but slight chance of mainly showers
during the afternoon.

Thereafter, the upper ridge over the area will help contribute to
a warming trend. Light SE winds should not erupt into a rough day
on Fort Peck Lake. And moist conditions should not lead to fire
weather concerns.

Hopefully, showers will return to the area later in June as it is
typically our wettest month, and growers & farmers will depend on it
as the area has been slightly drier than normal so far this year.

FORECAST CONFIDENCE AND DEVIATIONS:
Some uptick in pops were made near the ND border, as a low-level jet
and deeper moisture exist into the early evening hours. Patchy fog
was added for late tonight, otherwise NBM was pretty much followed
through the period. TFJ/Chambers

&&

.AVIATION...
Discussion from GGW

LAST UPDATE: 1920z

Expect showers/isolated thunderstorms into early evening within
30 miles of Fort Peck Lake. Fight conditions are expected to be
MVFR becoming VFR this evening. VFR conditions are expected Sunday
but there may be patchy fog in the morning.

WIND: E to SE 10 to 20 kts decreasing to 5 to 15 kts this evening
through tonight then increasing to 10 to 20 kts Sunday afternoon.
TFJ

&&

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

$$

weather.gov/glasgow