Sidney, Montana 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

177
FXUS65 KGGW 201948
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
148 PM MDT Fri Sep 20 2024

.DISCUSSION...
KEY MESSAGES:

 - SPC has upgraded most zones north of the Missouri River into a
   Marginal Risk through tonight with the greatest risk being
   gusty winds in excess of 58 mph.

 - Breezy conditions expected today, with a Lake Wind Advisory in
   effect for the overnight hours.

- An upper ridge builds in next week with a return to above normal
  temperatures.

WEATHER PATTERN OVERVIEW:

A shortwave trough will slide along the Canadian border today, and
drop a cold front south across the region this afternoon. Winds
will increase with the cold air advection and a few showers are
possible with the increasing instability. Winds will be strong
enough for a Lake Wind Advisory and should persist through most of
the night.

Northwest flow aloft and a Canadian high over the region will
bring cooler temperatures for the weekend. One more shortwave
slides through the region on Monday with showers generally across
central Montana. Behind this wave, the upper ridge rebounds with
temperatures returning to above normal levels.

FORECAST CONFIDENCE & DEVIATIONS:

Winds have struggled to gust above 30 mph for most locations. As
such, used the latest NBM mean guidance, however elected to keep
the Lake Wind Advisory, especially with the outflow boundary
enhancement of the overall synoptic winds with the frontal
passage.

-Enriquez


&&

.AVIATION...
UPDATED: 1945Z

DISCUSSION: Showers and thunderstorms associated with the frontal
passage will bring gusty and erratic winds at times. Winds will be
out of the northwest behind the front, gusting as high as 30-35
kt. Most showers clear the area by Saturday morning. By late
Saturday morning, winds will be sustained from the northwest at
10-15 kt.

-Enriquez



&&

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

&&

$$

weather.gov/glasgow