823
FXUS65 KGGW 250901
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
Issued by National Weather Service Billings MT
301 AM MDT Wed Sep 25 2024

.DISCUSSION...

KEY MESSAGES:

 - Much warmer than normal temperatures continue through the weekend,
   although slightly cooler than near record levels today.

 - Dry conditions are expected overall.


WEATHER PATTERN OVERVIEW:
An upper ridge will move east into the Northern Plains today. This will bring a
warm airmass northward to enable widespread highs near or exceeding 90 degrees
across the CWA. Daily records will be challenged through tonight for both the
daytime high and nighttime lows.

A couple of shortwaves and weak cold fronts that move through the region will
attempt to break down the ridge. The first of these waves will slide through on
Thursday, coming through dry with gusty northwest winds behind a cold front. This
front will make for elevated fire weather conditions for Thursday afternoon.

Temperatures will continue with a general downward trend early next week with a
mostly zonal flow pattern emerging. Rain chances look minimal late in the period
with an unfavorable pattern for maintaining moisture across the mountains.

FORECAST CONFIDENCE & DEVIATIONS:
Temperature spread increases for late in the week with uncertainty regarding
positioning of west coast trough and track of shortwaves ejecting from said trough.
The high model uncertainty is resulting in around a 10 degree range from the
25th to 75th percentiles by Saturday. There is high confidence in temperatures before
then and no widespread wetting rain occurring through the middle of next week.

&&

.AVIATION...

FLIGHT CONDITIONS: VFR.

DISCUSSION: An upper ridge moving over the area will provide for
mainly clear skies with just a few high level clouds.

WINDS: South at 10-15 knots, becoming 5-10 knots this evening.


&&

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

$$

weather.gov/glasgow