Sidney, Montana 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

788
FXUS65 KGGW 242027
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
227 PM MDT Thu Apr 24 2025

.DISCUSSION...

KEY MESSAGES:

1) Gusty SE winds Friday afternoon and evening will create rough
waves on Fort Peck Lake and elevated fire weather.

2) Look for a warm up this weekend before the next widespread
chance for rain by Sunday into Monday.

WEATHER PATTERN OVERVIEW:

Gusty SE winds will develop during the day on Friday with wind
speeds exceeding Lake Wind Advisory criteria (20, gust 30 mph)
particularly for western portions of Fort Peck Lake, with the
help of a somewhat tight surface gradient between high pressure to
the east and low pressure to the west.

Look for warmer temperatures as high as the lower 80s for the
weekend, coupled with a significant increase in precipitable water.
SW flow along ahead of the next Pacific trough will be present
over NE Montana during this time. As the trough slides east, look
for more widespread shower and slight t-storm chances Sunday into
Monday. Most ensemble guidance at this time favors the southeast
zones for getting at least a wetting rain, but a few solutions
show much of the area remaining dry.

FORECAST CONFIDENCE & DEVIATIONS:

Moderate confidence exists on the widespread rain chances for
Sunday and Monday, with low confidence on the occurrence of any
amounts of a half inch or more. The NBM was followed closely
through the period, except for going with around the 75th
percentile for winds on Friday.

&&

.AVIATION...

LAST UPDATED: 2000Z

FLIGHT CAT RANGE: VFR

DISCUSSION: Broken to overcast mid-level clouds will lead to
clearing overnight, as shower activity remains just south of KGDV.
Winds become gusty out of the SE at 20 to 30 kts Friday afternoon.

&&

.GGW WATCHES/WARNINGS/ADVISORIES...

Lake Wind Advisory from 10 AM to 9 PM MDT Friday for Central and
Southeast Phillips-Central and Southern Valley-Garfield-McCone-
Petroleum.

&&

$$

weather.gov/glasgow