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Glasgow, Montana 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Glasgow MT
National Weather Service Forecast for: Glasgow MT
Issued by: National Weather Service Glasgow, MT
Updated: 2:51 am MST Nov 21, 2024
 
Overnight

Overnight: Mostly cloudy, with a low around 10. Wind chill values between zero and 5. East wind around 9 mph.
Mostly Cloudy

Thursday

Thursday: Partly sunny, with a high near 35. Wind chill values between zero and 10. East southeast wind 8 to 10 mph.
Partly Sunny

Thursday
Night
Thursday Night: A 30 percent chance of snow, mainly before 8pm.  Mostly cloudy, with a low around 17. East northeast wind around 6 mph becoming north northwest after midnight.  Little or no snow accumulation expected.
Chance Snow

Friday

Friday: Snow likely, mainly after 11am.  Mostly cloudy, with a high near 30. North wind 5 to 8 mph becoming east in the afternoon.  Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Snow Likely

Friday
Night
Friday Night: Snow likely, mainly before 11pm.  Cloudy, with a low around 17. East wind 9 to 11 mph.  Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Snow Likely
then Chance
Snow
Saturday

Saturday: Snow likely, mainly after 11am.  Cloudy, with a high near 30. East wind 11 to 14 mph, with gusts as high as 21 mph.  Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Snow Likely

Saturday
Night
Saturday Night: Snow.  Low around 7. East wind 10 to 14 mph becoming west northwest after midnight. Winds could gust as high as 20 mph.  Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Snow

Sunday

Sunday: A 40 percent chance of snow.  Partly sunny, with a high near 19. West northwest wind around 16 mph, with gusts as high as 25 mph.
Chance Snow

Sunday
Night
Sunday Night: Mostly cloudy, with a low around -4. West northwest wind 6 to 11 mph, with gusts as high as 20 mph.
Mostly Cloudy

Lo 10 °F Hi 35 °F Lo 17 °F Hi 30 °F Lo 17 °F Hi 30 °F Lo 7 °F Hi 19 °F Lo -4 °F

 

Overnight
 
Mostly cloudy, with a low around 10. Wind chill values between zero and 5. East wind around 9 mph.
Thursday
 
Partly sunny, with a high near 35. Wind chill values between zero and 10. East southeast wind 8 to 10 mph.
Thursday Night
 
A 30 percent chance of snow, mainly before 8pm. Mostly cloudy, with a low around 17. East northeast wind around 6 mph becoming north northwest after midnight. Little or no snow accumulation expected.
Friday
 
Snow likely, mainly after 11am. Mostly cloudy, with a high near 30. North wind 5 to 8 mph becoming east in the afternoon. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Friday Night
 
Snow likely, mainly before 11pm. Cloudy, with a low around 17. East wind 9 to 11 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday
 
Snow likely, mainly after 11am. Cloudy, with a high near 30. East wind 11 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Saturday Night
 
Snow. Low around 7. East wind 10 to 14 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Sunday
 
A 40 percent chance of snow. Partly sunny, with a high near 19. West northwest wind around 16 mph, with gusts as high as 25 mph.
Sunday Night
 
Mostly cloudy, with a low around -4. West northwest wind 6 to 11 mph, with gusts as high as 20 mph.
Monday
 
Mostly sunny, with a high near 16. Light and variable wind becoming east 5 to 7 mph in the afternoon.
Monday Night
 
A 20 percent chance of snow. Mostly cloudy, with a low around -2. East wind around 6 mph.
Tuesday
 
Partly sunny, with a high near 19.
Tuesday Night
 
Mostly cloudy, with a low around 0.
Wednesday
 
Partly sunny, with a high near 19.

 

Forecast from NOAA-NWS for Glasgow MT.

Weather Forecast Discussion
148
FXUS65 KGGW 211007
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
307 AM MST Thu Nov 21 2024

.DISCUSSION...

KEY MESSAGES:

 - Freezing rain chances increase for locations south and west of
   Fort Peck Lake, leading to a risk for a light glaze from Friday
   night through Saturday morning.

 - Trend for snowfall amounts continue to increase. Probabilities
   of snowfall amounts listed below. Will continue to monitor and
   issue winter weather headlines accordingly.

 - A well-below normal period of temperatures are in store from
   Monday.


WEATHER PATTERN OVERVIEW:

A dry Thursday is in store as eastern Montana is placed under an
upper-level ridge. This will be short lived as a series of upper-
level pattern changes brings several bouts of precipitation for
the region.

Today, an Alberta Clipper will develop, flattening out the upper
level ridge. This will increase chances of light snow with minimal
accumulations tonight. As the Clipper moves toward the Great Lakes
region, a shortwave ridge builds in its wake across Montana.
Consequently, this warm advection in the low levels will result in
a warm nose setting up across central Montana and extending into
NE Montana, primarily south of the Missouri. This will increase
chances for freezing rain as surface temperatures are expected to
be in the 20s. North of the Missouri, the forecast soundings are
more likely to support frozen precipitation, thus allowing a quick
1-2 inches of snowfall accumulating by Friday night along the
International Border.

By Saturday, the prominent upper level low bringing an Atmospheric
River event to the PNW will see the low begin to split off a
trough that will continue to provide the upper-level divergence
to support moderate to heavy snowfall through Sunday morning.
Given the latest forecast trends of increasing snowfall amounts
north of the Missouri River with every ensemble run, the
likelihood of winter headlines being issued looks certain. Will
discuss with the day crew and neighbors on how we collectively
proceed for this late November winter storm.

From Monday, flow aloft will be northwesterly, ushering in an
Arctic airmass, leading to well below normal temperatures as we
round out November. Wind chill values at the night time are
expected to remain above -20F for the forecast, so likely no
headlines for cold weather as of yet.
FORECAST CONFIDENCE & DEVIATIONS:

There is a low to medium confidence in impacts as a result of ice
accumulations from the freezing rain threat Friday afternoon
through Saturday morning. As of now, the area with the greatest
threat appears to be along the higher terrain south of the
Missouri Breaks.

With respect to snowfall for a period ending 5 pm Sunday
(according to the NBM):

Chance of at least 4" of snowfall:
 - North of Hwy 2: 70-90% chance
 - South of the Missouri: 20-30% chance (decreasing to zero near
   I-94)

Chance of at least 6" of snowfall:
 - North of Hwy 2: 50-70% chance

Chance of at least 8" of snowfall:
 - Along Hwy 2: 10-30% chance
 - Along the International Border: near 50% chance




 - Enriquez



&&

.AVIATION...
LAST UPDATED: 0940Z

FLIGHT CAT RANGE: Mostly VFR// MVFR-IFR in the morning due to
patchy freezing fog, and later on this evening in snow showers

DISCUSSION: Areas of patchy freezing fog will decrease through the
morning. Scattered high clouds will become more of mid to low-
cloud deck tonight generally north of the Missouri River.

WIND: SE winds at 5-10 kts today. Tonight, winds become more
northerly at 5-10 kts.




&&

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

$$

weather.gov/glasgow
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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