Sidney, Montana 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

110
FXUS65 KGGW 172118
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
218 PM MST Fri Jan 17 2025

.DISCUSSION...

KEY MESSAGES:

1) Extreme Cold Advisories have been issued for mainly across the
northeast half of NE Montana.

2) This will be the or close to the coldest air that we have seen
this Winter. Frostbite will occur within minutes, especially in
Sheridan County.

3) A slight warm-up can be expected next week.

4) A weather system may bring light snow late next week.

WEATHER PATTERN OVERVIEW:

Arctic air has begun to filter in and with that in mind, Extreme
Cold Advisories have been issued. Two segments were used as timing
of onset will be later with zones over the central regions, while
the NE zones will begin late tonight.

There is a possibility that Sheridan County will nee an upgrade to
a Extreme Cold Warning by Sunday morning. Will let later shifts
work that out.

The worst of the Extreme Cold will end Monday morning but only
have current advisories going till noon Sunday for now.

Look for a slight warm-up by mid-week next week.

A disturbance dropping southeast across the area later in the week
will bring chances for light snow. TFJ

FORECAST CONFIDENCE & DEVIATIONS:
Generally went with baseline (NBM) forecast numbers. Blended in
some lower NAM numbers for Sky grids late Saturday as models tend
to keep clouds in during arctic airmasses. TFJ

&&

.AVIATION...

LAST UPDATED: 2120Z

FLIGHT CAT RANGE: A mix of VFR/MVFR tonight, VFR Saturday.

DISCUSSION: Low level stratocumulus clouds moving south across the
area will linger through tonight with scattered snow showers.
Clearing from north to south Saturday is expected. Visibilities
will also drop at times snow showers through tonight.

Bitter cold temperatures will impact flights between Saturday
morning and Tuesday morning. Temperatures will be well below zero
at times.

WIND: North winds will become NW 10 to 15 knots tonight and
continue Saturday.



&&

.GGW WATCHES/WARNINGS/ADVISORIES...
Cold Weather Advisory from 3 PM Saturday to noon MST Sunday for
Central and Southern Valley-Dawson-Eastern Roosevelt-Northern
Phillips-Richland-Western Roosevelt-Wibaux.

Cold Weather Advisory from midnight tonight to noon MST Sunday
for Daniels-Northern Valley-Sheridan.

Winter Weather Advisory until 6 PM MST this evening for Dawson-
Eastern Roosevelt-Garfield-McCone-Petroleum-Prairie-Richland-
Sheridan-Wibaux.

&&

$$

weather.gov/glasgow