Alert archive / Montana / Winter Storm Warnings in 2021

Winter Storm Warning 2, NWS Glasgow, MT

December 3, 20215 counties in Montana

NWS Glasgow, MT issued this winter storm warning at Dec 3, 2021, 2:56 AM MST for 5 counties in Montana. It took effect at Dec 4, 2021, 5:00 AM MST. It was in force for 22 hr. 7 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Dec 3, 2021, 2:56 AM MST (09:56 UTC)
In effect from
Dec 4, 2021, 5:00 AM MST
Expired
Dec 5, 2021, 3:06 AM MST
In force
22 hr
Issued by
NWS Glasgow, MT

Counties Daniels County, MT, Phillips County, MT, Roosevelt County, MT, Sheridan County, MT, Valley County, MT

The radar

The Glasgow radar (KGGW), 60 km from the middle of the area, began a volume at 09:55 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Dec 4, 12:45 PM MSTSNOW 55 E Zortman, MTSTILL SNOWING.
Dec 4, 12:45 PM MSTSNOW 57 E Zortman, MTCORRECTS PREVIOUS SNOW REPORT FROM 5 E ZORTMAN. STILL SNOWING.
Dec 4, 4:00 PM MSTSNOW 3.5Hinsdale, MT
Dec 4, 5:00 PM MSTSNOW 3.61 N Glasgow, MTSNOW STARTED AT 7AM AND STILL SNOWING AT THE TIME OF OBSERVATION.
Dec 4, 5:50 PM MSTSNOW 46 W Larslan, MT
Dec 4, 8:33 PM MSTSNOW 4Fort Peck, MT
Dec 4, 9:00 PM MSTSNOW 3.8Glasgow, MT

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 9.9 hours before the alert went out and 58 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Glasgow Intl Airport, MT at 00:00Z on 2021-12-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Glasgow Intl Airport, MT at 00:00Z on 2021-12-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -32 square meters per square second.1939587897117136156Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1790 m above ground
0-6 km bulk shear
85 kt
0-1 km storm-relative helicity
-32 m²/s²
0-3 km storm-relative helicity
161 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

899 
WWUS45 KGGW 030956
WSWGGW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Glasgow MT
256 AM MST Fri Dec 3 2021

MTZ018>020-061-062-040000-
/O.UPG.KGGW.WS.A.0002.211204T1300Z-211205T0500Z/
/O.NEW.KGGW.WS.W.0002.211204T1200Z-211205T1200Z/
Daniels-Sheridan-Western Roosevelt-Northern Valley-
Eastern Roosevelt-
Including the cities of Scobey, Plentywood, Medicine Lake, 
Wolf Point, Poplar, Opheim, and Culbertson
256 AM MST Fri Dec 3 2021

...WINTER STORM WARNING IN EFFECT FROM 5 AM SATURDAY TO 5 AM MST
SUNDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 7 
  inches.

* WHERE...Daniels, Sheridan, Northern Valley and Roosevelt 
  Counties.

* WHEN...From 5 AM Saturday to 5 AM MST Sunday.

* IMPACTS...Travel could be very difficult. Roadways will become 
  snow-covered and slippery. Patchy blowing snow could 
  significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MTZ059-040000-
/O.UPG.KGGW.WS.A.0002.211204T0700Z-211205T0100Z/
/O.NEW.KGGW.WS.W.0002.211204T1200Z-211205T1200Z/
Northern Phillips-
Including the city of Whitewater
256 AM MST Fri Dec 3 2021

...WINTER STORM WARNING IN EFFECT FROM 5 AM SATURDAY TO 5 AM MST
SUNDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 7 
  inches.

* WHERE...Northern Phillips County.

* WHEN...From 5 AM Saturday to 5 AM MST Sunday.

* IMPACTS...Travel could be very difficult. Roadways will become 
  snow-covered and slippery.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MTZ060-040000-
/O.UPG.KGGW.WS.A.0002.211204T0700Z-211205T0100Z/
/O.NEW.KGGW.WW.Y.0015.211204T0600Z-211204T1800Z/
Southwest Phillips-
Including the city of Zortman
256 AM MST Fri Dec 3 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO
11 AM MST SATURDAY...

* WHAT...Snow expected. Total snow accumulations of 3 to 5 
  inches.

* WHERE...Southwest Phillips County.

* WHEN...From 11 PM this evening to 11 AM MST Saturday.

* IMPACTS...Plan on slippery road conditions. Roadways will become
  snow-covered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MTZ016-040000-
/O.UPG.KGGW.WS.A.0002.211204T0700Z-211205T0100Z/
/O.NEW.KGGW.WW.Y.0015.211204T1200Z-211205T1200Z/
Central and Southeast Phillips-
Including the cities of Malta and Saco
256 AM MST Fri Dec 3 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM SATURDAY TO 5 AM
MST SUNDAY...

* WHAT...Snow expected. Total snow accumulations of 3 to 5 
  inches.

* WHERE...Central and Southeast Phillips County.

* WHEN...From 5 AM Saturday to 5 AM MST Sunday.

* IMPACTS...Travel could be very difficult. Roadways will become 
  snow-covered and slippery.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MTZ021-040000-
/O.NEW.KGGW.WW.Y.0015.211204T0600Z-211204T1800Z/
Petroleum-
Including the city of Winnett
256 AM MST Fri Dec 3 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO
11 AM MST SATURDAY...

* WHAT...Snow expected. Total snow accumulations of 1 to 3 inches,
  mainly north of Highway 200. 

* WHERE...Petroleum County.

* WHEN...From 11 PM this evening to 11 AM MST Saturday.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MTZ017-022>025-040000-
/O.NEW.KGGW.WW.Y.0015.211204T1200Z-211205T1200Z/
Central and Southern Valley-Garfield-McCone-Richland-Dawson-
Including the cities of Glasgow, Fort Peck, Hinsdale, Frazer, 
Jordan, Circle, Sidney, Fairview, Glendive, and Richey
256 AM MST Fri Dec 3 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM SATURDAY TO 5 AM
MST SUNDAY...

* WHAT...Snow expected with periods of blowing snow. Total snow
  accumulations of 2 to 5 inches, mainly north of Highway 200.
  Winds gusting as high as 30 mph.

* WHERE...Central and Southern Valley, Garfield, McCone, 
  Richland and Dawson Counties.

* WHEN...From 5 AM Saturday to 5 AM MST Sunday.

* IMPACTS...Plan on slippery road conditions. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$
6 follow-up statements
609 
WWUS45 KGGW 032139
WSWGGW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Glasgow MT
239 PM MST Fri Dec 3 2021

MTZ018>020-059-061-062-041200-
/O.CON.KGGW.WS.W.0002.211204T1200Z-211205T1200Z/
Daniels-Sheridan-Western Roosevelt-Northern Phillips-
Northern Valley-Eastern Roosevelt-
Including the cities of Scobey, Plentywood, Medicine Lake, 
Wolf Point, Poplar, Whitewater, Opheim, and Culbertson
239 PM MST Fri Dec 3 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM SATURDAY TO
5 AM MST SUNDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 6 
  inches.

* WHERE...Portions of northeast Montana.

* WHEN...From 5 AM Saturday to 5 AM MST Sunday.

* IMPACTS...Plan on slippery road conditions. Patchy blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MTZ021-060-041200-
/O.CON.KGGW.WW.Y.0015.211204T0600Z-211204T1800Z/
Petroleum-Southwest Phillips-
Including the cities of Winnett and Zortman
239 PM MST Fri Dec 3 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 PM THIS
EVENING TO 11 AM MST SATURDAY...

* WHAT...Snow expected. Total snow accumulations of 1 to 3 
  inches.

* WHERE...Southwest Phillips and Petroleum Counties.

* WHEN...From 11 PM this evening to 11 AM MST Saturday.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MTZ016-017-022>025-041200-
/O.CON.KGGW.WW.Y.0015.211204T1200Z-211205T1200Z/
Central and Southeast Phillips-Central and Southern Valley-
Garfield-McCone-Richland-Dawson-
Including the cities of Malta, Saco, Glasgow, Fort Peck, 
Hinsdale, Frazer, Jordan, Circle, Sidney, Fairview, Glendive, 
and Richey
239 PM MST Fri Dec 3 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 AM SATURDAY
TO 5 AM MST SUNDAY...

* WHAT...Snow expected. Total snow accumulations of 1 to 3 
  inches. Winds gusting as high as 35 mph.

* WHERE...Portions of northeast Montana.

* WHEN...From 5 AM Saturday to 5 AM MST Sunday.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$
027 
WWUS45 KGGW 041009
WSWGGW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Glasgow MT
309 AM MST Sat Dec 4 2021

MTZ018>020-059-061-062-050015-
/O.CON.KGGW.WS.W.0002.211204T1200Z-211205T1200Z/
Daniels-Sheridan-Western Roosevelt-Northern Phillips-
Northern Valley-Eastern Roosevelt-
Including the cities of Scobey, Plentywood, Medicine Lake, 
Wolf Point, Poplar, Whitewater, Opheim, and Culbertson
309 AM MST Sat Dec 4 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SUNDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 6 
  inches. Winds gusting as high as 35 mph.

* WHERE...Portions of northeast Montana.

* WHEN...Until 5 AM MST Sunday.

* IMPACTS...Plan on slippery road conditions. Patchy blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MTZ021-060-041800-
/O.CON.KGGW.WW.Y.0015.000000T0000Z-211204T1800Z/
Petroleum-Southwest Phillips-
Including the cities of Winnett and Zortman
309 AM MST Sat Dec 4 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* WHAT...Snow. Additional snow accumulations of 1 to 3 inches.
  Isolated higher amounts possible over the Little Rockies. Winds
  gusting as high as 35 mph.

* WHERE...Southwest Phillips and Petroleum Counties.

* WHEN...Until 11 AM MST this morning.

* IMPACTS...Plan on slippery road conditions. Patchy blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MTZ016-017-022>025-050015-
/O.CON.KGGW.WW.Y.0015.211204T1200Z-211205T1200Z/
Central and Southeast Phillips-Central and Southern Valley-
Garfield-McCone-Richland-Dawson-
Including the cities of Malta, Saco, Glasgow, Fort Peck, 
Hinsdale, Frazer, Jordan, Circle, Sidney, Fairview, Glendive, 
and Richey
309 AM MST Sat Dec 4 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST
SUNDAY...

* WHAT...Snow expected. Total snow accumulations of 1 to 3 inches.
  Isolated higher amounts possible near Highway 2. Winds gusting 
  as high as 35 mph.

* WHERE...Portions of northeast Montana.

* WHEN...Until 5 AM MST Sunday.

* IMPACTS...Plan on slippery road conditions. Patchy blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$
126 
WWUS45 KGGW 041755
WSWGGW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Glasgow MT
1055 AM MST Sat Dec 4 2021

MTZ018>020-059-061-062-050800-
/O.CON.KGGW.WS.W.0002.000000T0000Z-211205T1200Z/
Daniels-Sheridan-Western Roosevelt-Northern Phillips-
Northern Valley-Eastern Roosevelt-
Including the cities of Scobey, Plentywood, Medicine Lake, 
Wolf Point, Poplar, Whitewater, Opheim, and Culbertson
1055 AM MST Sat Dec 4 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SUNDAY...

* WHAT...Heavy snow. Additional snow accumulations of 3 to 5 
  inches. Winds gusting as high as 35 mph.

* WHERE...Portions of northeast Montana.

* WHEN...Until 5 AM MST Sunday.

* IMPACTS...Plan on slippery road conditions. Patchy blowing snow
  could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MTZ021-060-050100-
/O.EXT.KGGW.WW.Y.0015.000000T0000Z-211205T0100Z/
Petroleum-Southwest Phillips-
Including the cities of Winnett and Zortman
1055 AM MST Sat Dec 4 2021

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 6 PM MST THIS
EVENING...

* WHAT...Snow. Additional snow accumulations of up to two inches.

* WHERE...Southwest Phillips and Petroleum Counties.

* WHEN...Until 6 PM MST this evening.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MTZ016-017-022>025-050800-
/O.CON.KGGW.WW.Y.0015.000000T0000Z-211205T1200Z/
Central and Southeast Phillips-Central and Southern Valley-
Garfield-McCone-Richland-Dawson-
Including the cities of Malta, Saco, Glasgow, Fort Peck, 
Hinsdale, Frazer, Jordan, Circle, Sidney, Fairview, Glendive, 
and Richey
1055 AM MST Sat Dec 4 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST
SUNDAY...

* WHAT...Snow. Additional snow accumulations of up to 4 inches. 
  Winds gusting as high as 35 mph.

* WHERE...Portions of northeast Montana.

* WHEN...Until 5 AM MST Sunday.

* IMPACTS...Plan on slippery road conditions. Patchy blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$
560 
WWUS45 KGGW 050151
WSWGGW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Glasgow MT
651 PM MST Sat Dec 4 2021

MTZ018>020-059-061-062-051200-
/O.CON.KGGW.WS.W.0002.000000T0000Z-211205T1200Z/
Daniels-Sheridan-Western Roosevelt-Northern Phillips-
Northern Valley-Eastern Roosevelt-
Including the cities of Scobey, Plentywood, Medicine Lake, 
Wolf Point, Poplar, Whitewater, Opheim, and Culbertson
651 PM MST Sat Dec 4 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SUNDAY...

* WHAT...Heavy snow. Additional snow accumulations of up to two 
  inches.

* WHERE...Portions of northeast Montana.

* WHEN...Until 5 AM MST Sunday.

* IMPACTS...Plan on slippery road conditions. Patchy blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MTZ016-017-022>025-051200-
/O.CON.KGGW.WW.Y.0015.000000T0000Z-211205T1200Z/
Central and Southeast Phillips-Central and Southern Valley-
Garfield-McCone-Richland-Dawson-
Including the cities of Malta, Saco, Glasgow, Fort Peck, 
Hinsdale, Frazer, Jordan, Circle, Sidney, Fairview, Glendive, 
and Richey
651 PM MST Sat Dec 4 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST
SUNDAY...

* WHAT...Snow. Additional snow accumulations of up to one inch. 
  Winds gusting as high as 35 mph.

* WHERE...Portions of northeast Montana.

* WHEN...Until 5 AM MST Sunday.

* IMPACTS...Plan on slippery road conditions. Patchy blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$
595 
WWUS45 KGGW 050423
WSWGGW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Glasgow MT
923 PM MST Sat Dec 4 2021

MTZ018-020-059-061-050530-
/O.CAN.KGGW.WS.W.0002.000000T0000Z-211205T1200Z/
Daniels-Western Roosevelt-Northern Phillips-Northern Valley-
923 PM MST Sat Dec 4 2021

...WINTER STORM WARNING IS CANCELLED...

Snow has diminished this evening. Roads will remain snow covered
and slippery. 

$$

MTZ016-017-022-023-050530-
/O.CAN.KGGW.WW.Y.0015.000000T0000Z-211205T1200Z/
Central and Southeast Phillips-Central and Southern Valley-
Garfield-McCone-
923 PM MST Sat Dec 4 2021

...WINTER WEATHER ADVISORY IS CANCELLED...

Snow has diminished this evening over most of the region.
Scattered snow showers will occur through 11 pm in areas along and
south of highway 200. Roads will remain snow covered and slippery
overnight. 

$$

MTZ019-062-051200-
/O.CON.KGGW.WS.W.0002.000000T0000Z-211205T1200Z/
Sheridan-Eastern Roosevelt-
Including the cities of Plentywood, Medicine Lake, and Culbertson
923 PM MST Sat Dec 4 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SUNDAY...

* WHAT...Heavy snow. Additional snow accumulations of up to one 
  inch.

* WHERE...Eastern Roosevelt and Sheridan Counties.

* WHEN...Until 5 AM MST Sunday.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MTZ024-025-051200-
/O.CON.KGGW.WW.Y.0015.000000T0000Z-211205T1200Z/
Richland-Dawson-
Including the cities of Sidney, Fairview, Glendive, and Richey
923 PM MST Sat Dec 4 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST
SUNDAY...

* WHAT...Snow. Additional snow accumulations of up to one inch. 
  Winds gusting as high as 35 mph.

* WHERE...Dawson and Richland Counties.

* WHEN...Until 5 AM MST Sunday.

* IMPACTS...Plan on slippery road conditions. Patchy blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$
146 
WWUS45 KGGW 051006
WSWGGW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Glasgow MT
306 AM MST Sun Dec 5 2021

MTZ019-062-060015-
/O.CAN.KGGW.WS.W.0002.000000T0000Z-211205T1200Z/
/O.NEW.KGGW.WC.Y.0009.211206T0300Z-211206T1500Z/
Sheridan-Eastern Roosevelt-
Including the cities of Plentywood, Medicine Lake, and Culbertson
306 AM MST Sun Dec 5 2021

...WIND CHILL ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 8 AM
MST MONDAY...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...Very cold wind chills expected. Wind chills as low as 25  
  below zero.

* WHERE...Sheridan and Eastern Roosevelt Counties.

* WHEN...From 8 PM this evening to 8 AM MST Monday.

* IMPACTS...The cold wind chills could cause frostbite on 
  exposed skin in as little as 30 minutes.

* ADDITIONAL DETAILS...Light snow and patchy blowing snow will
  continue at times today, before the cold wind chills take effect
  tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves. 

&&

$$

MTZ024-060015-
/O.CAN.KGGW.WW.Y.0015.000000T0000Z-211205T1200Z/
/O.NEW.KGGW.WC.Y.0009.211206T0300Z-211206T1500Z/
Richland-
Including the cities of Sidney and Fairview
306 AM MST Sun Dec 5 2021

...WIND CHILL ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 8 AM
MST MONDAY...
...WINTER WEATHER ADVISORY IS CANCELLED...

* WHAT...Very cold wind chills expected. Wind chills as low as 
  25 below zero.

* WHERE...Richland County.

* WHEN...From 8 PM this evening to 8 AM MST Monday.

* IMPACTS...The cold wind chills could cause frostbite on 
  exposed skin in as little as 30 minutes.

* ADDITIONAL DETAILS...Light snow and patchy blowing snow will
  continue at times today, before the cold wind chills take effect
  tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves. 

&&

$$

MTZ025-051115-
/O.CAN.KGGW.WW.Y.0015.000000T0000Z-211205T1200Z/
Dawson-
306 AM MST Sun Dec 5 2021

...WINTER WEATHER ADVISORY IS CANCELLED...

Although the Winter Weather Advisory is no longer in effect, 
light snow and patchy blowing snow will continue at times today.

$$

MTZ017-018-020-059-061-060015-
/O.NEW.KGGW.WC.Y.0009.211206T0300Z-211206T1500Z/
Central and Southern Valley-Daniels-Western Roosevelt-
Northern Phillips-Northern Valley-
Including the cities of Glasgow, Fort Peck, Hinsdale, Frazer, 
Scobey, Wolf Point, Poplar, Whitewater, and Opheim
306 AM MST Sun Dec 5 2021

...WIND CHILL ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 8 AM
MST MONDAY...

* WHAT...Very cold wind chills expected. Wind chills as low as 
  25 below zero.

* WHERE...Valley, Daniels, Western Roosevelt,and Northern Phillips
  Counties.

* WHEN...From 8 PM this evening to 8 AM MST Monday.

* IMPACTS...The cold wind chills could cause frostbite on 
  exposed skin in as little as 30 minutes.

* ADDITIONAL DETAILS...Light snow and patchy blowing snow will
  continue at times today, before the cold wind chills take effect
  tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves. 

&&

$$

The office that day

Everything else NWS Glasgow, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 3, 2:56 AM MSTWinter Weather AdvisoryGGWDawson, Garfield, McCone, Petroleum, Phillips, Richland and 1 more48 hr

Nearby

Winter Storm Warnings in Montana, 2021Every winter storm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.