Sidney, Montana 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

956
FXUS65 KGGW 302140
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
240 PM MST Thu Jan 30 2025

.DISCUSSION...

KEY MESSAGES:

1) A back door cold front will affect part of the northeast
Montana late tonight to begin a more active weather pattern.

2) Precipitation chances start on Friday in the north and Friday
night in all areas.

3) A strong Arctic cold front will move in on Saturday night and
stay over the region through much of next week.

WEATHER PATTERN OVERVIEW:
There is strong agreement among ensembles of a backdoor cold front
moving in late tonight, which will bring low to moderate
probabilities of precipitation along the MT/SK border through the
day Friday. There is high confidence this front will stall, become
a warm front, and progress eastward Friday night. The HRRR and HRW
FV3 are in agreement of mixed precipitation, in the form of
freezing rain, sleet, and rain, occurring through the late morning
on Saturday. There is low confidence freezing rain will accumulate
more than one hundredth of precipitation. As this activity ends, a
disturbance is expected to move through central and southern MT on
Saturday and bring a mix of rain and snow as surface temperatures
climb above freezing. On Saturday evening, an arctic front will
bring temperatures well below average. Sunday evening marks the
beginning of snow chances that will linger through much of next
week. There is low confidence on snowfall amounts beyond Sunday
evening. Cold weather products are also expected in the north on
Sunday morning, and other locations for Sunday night into Monday
morning.
FORECAST CONFIDENCE & DEVIATIONS:
There is moderate confidence on light snow occurring across the
far north on Friday, and mixed precipitation on Friday night.
There is high confidence of below average temperatures coming in
behind an Arctic front that will move into the are on Saturday
night.

Deviation toward raising POPs for the opportunity for mixed
precipitation moving through on Friday night. Also increased
southeast winds ahead of the warm frontal passage as well.

&&

.AVIATION...
LAST UPDATE: 2130Z

FLIGHT CAT RANGE: VFR, then MVFR/IFR late tonight.

DISCUSSION: Amid a broad upper level ridge, a back door cold front
will affect TAF sites beginning after 08Z tonight. There is high
(80 percent) confidence TAF sites will see MVFR and IFR ceilings
between 10Z and 21Z. There is moderate confidence of MVFR
visibilities occurring through 21Z as well.
SFC WIND: West southwest at 5 to 10 knots, becoming light and
variable after 01Z, becoming northeast at 5 to 15 knots after 12Z,
becoming east southeast at 10 to 20 knots after 18Z.

&&

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

$$

weather.gov/glasgow