657
FXUS65 KGGW 262012
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
212 PM MDT Mon Oct 26 2026

.KEY MESSAGES...
- Persistent southeast winds continue through tonight. A Lake
  Wind Advisory is in effect for Fort Peck Lake.

- Rain and periods of mixed precipitation will move from west to
  east overnight tonight. The highest rain totals remain west of
  Glasgow.

- Chances for precipitation return near the end of the week.


&&

.DISCUSSION...

Gusty east winds will continue across the region into the early
afternoon hours tomorrow. The Lake Wind Advisory remains in place
until 4 AM tonight with wave heights will further increase overnight.

Ensembles show an upper trough extending eastward into eastern
Montana, increasing chances for rainfall and mixed precipitation
overnight. Deterministic QPF forecasts have maintained both
spatially and quantitatively this cycle, suggesting slightly
higher confidence in the areas of heaviest rainfall. Rain amounts
remain between a 0.10" and 0.30" over most areas. Look for lesser
amounts toward the MT/ND border. No snow accumulation is expected
even if the initial mixed precipitation falls mostly as wet snow
overnight. The low will track further east out of Montana by
Tuesday evening.

As the week progresses, a slow moving low off the coast of the
PNW will allow for consistent southwesterly flow aloft to bring
moisture rich air over the region. The upper level trough begins
to move slowly eastward by the end of the week into the weekend
bringing returned chances for precipitation.

Near to slightly below average temperatures will take the stage
through most of this week.

FORECAST CONFIDENCE & DEVIATIONS:

No changes to NBM this forecast cycle.

Confidence remains above average on cool and unsettled weather
though uncertainty remains on specific amounts.


&&

.AVIATION...

LAST UPDATED: 1730Z

FLIGHT CAT RANGE: MVFR - IFR

DISCUSSION: MVFR ceilings will maintain through the evening
gradually lowering to IFR by 6Z. An initial push of mixed
precipitation will move east into TAF sites after 12Z and
transition to fully rain by 18Z.

WIND: Southeast at 15 to 20 kts gusting to 30 kts, begging to
veer east by 16Z. East winds at 5 to 10 kts after 20Z tomorrow.


&&

.GGW WATCHES/WARNINGS/ADVISORIES...
Lake Wind Advisory until 4 AM MDT Tuesday for Central and
Southeast Phillips-Central and Southern Valley-Garfield-McCone-
Petroleum.

&&

$$

weather.gov/glasgow