Alert archive / Montana / Winter Storm Warnings in 2021

Winter Storm Warning 6, NWS Great Falls, MT

December 11, 2021

NWS Great Falls, MT issued this winter storm warning at Dec 11, 2021, 7:10 PM MST. It was in force for 16 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Dec 11, 2021, 7:10 PM MST (02:10 UTC)
Expired
Dec 12, 2021, 11:00 AM MST
In force
16 hr
Issued by
NWS Great Falls, MT

The text

As transmitted.

052 
WWUS45 KTFX 120210
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
710 PM MST Sat Dec 11 2021

MTZ009-121800-
/O.CAN.KTFX.BZ.W.0002.000000T0000Z-211212T1800Z/
/O.NEW.KTFX.WS.W.0006.211212T0210Z-211212T1800Z/
Northern Rocky Mountain Front-
Including the following locations: Logan Pass, Heart Butte,
Browning, and Marias Pass
710 PM MST Sat Dec 11 2021

...WINTER STORM WARNING IN EFFECT UNTIL 11 AM MST SUNDAY...
...BLIZZARD WARNING IS CANCELLED...

* WHAT...Snow and blowing snow. Additional snow accumulations 3 to 6 
  inches close to the Rocky Mountain Front, with 6 to 12 inches on 
  Marias Pass.  Winds gusting 25 to 40 mph.

* WHERE...Northern Rocky Mountain Front.

* WHEN...Until 11 AM MST Sunday.

* IMPACTS...Travel could be very difficult to impossible. Snow and 
  blowing snow could reduce visibility below 1/2 mile.

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 can 
be obtained by calling 5 1 1 or visiting the MDT Road Report website.

&&

$$

MTZ008-015-055-121800-
/O.CON.KTFX.WW.Y.0043.000000T0000Z-211213T0600Z/
Beaverhead-Madison-Gallatin-
Including the following locations: Targhee Pass, West
Yellowstone, Monida Pass, Big Hole Pass, and Raynolds Pass
710 PM MST Sat Dec 11 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST 
SUNDAY...

* WHAT...Snow expected. Total snow accumulations between 2 and 6 
  inches, with up to 12 inches over mountain passes along the Idaho 
  border. Winds gusting as high as 65 mph near the higher peaks.

* WHERE...Elevations above 6500 feet in Beaverhead, Gallatin and 
  Madison Counties.

* WHEN...Until 11 PM MST Sunday.

* IMPACTS...Travel could be difficult, especially over Chief Joseph, 
  Raynolds, and Targhee Passes. Blowing snow could significantly 
  reduce visibility at times.

* ADDITIONAL DETAILS...This advisory does not include the cities of 
  Bozeman, Dillon, or Ennis; in addition to Bozeman Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by calling 5 1 1 or visiting the MDT Road 
Report website.

&&

$$

MTZ014-048-121800-
/O.CON.KTFX.WW.Y.0043.000000T0000Z-211212T1800Z/
Central and Southern Lewis and Clark-Southern Rocky Mountain
Front-
Including the following locations: Lincoln, Choteau, Bynum,
Augusta, MacDonald Pass, Rogers Pass, and Flesher Pass
710 PM MST Sat Dec 11 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST 
SUNDAY...

* WHAT...Snow. Additional snow accumulations of 4 to 8 inches over 
  Rogers Pass, with 8 to 16 inches in the mountains north of Montana 
  Highway 200. Winds gusting as high as 65 mph.

* WHERE...Lewis and Clark County and the Southern Rocky Mountain 
  Front.

* WHEN...Until 11 AM MST Sunday.

* IMPACTS...Travel could be difficult, especially over Rogers Pass 
  and on secondary roads along the immediate Rocky Mountain Front. 
  Blowing snow could significantly reduce visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by calling 5 1 1 or visiting the MDT Road 
Report website.

&&

$$
2 follow-up statements
309 
WWUS45 KTFX 120921
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
221 AM MST Sun Dec 12 2021

MTZ009-121800-
/O.CON.KTFX.WS.W.0006.000000T0000Z-211212T1800Z/
Northern Rocky Mountain Front-
Including the following locations: Logan Pass, Heart Butte,
Browning, and Marias Pass
221 AM MST Sun Dec 12 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS 
MORNING...

* WHAT...Snow and blowing snow. Additional snow accumulations of 2 
  to 4 inches, with up to 6 inches in the mountains. Winds gusting 
  as high 25 to 40 mph.

* WHERE...Northern Rocky Mountain Front.

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

* IMPACTS...Travel could be very difficult. Snow and blowing snow 
  could reduce visibility below 1/2 mile at times.

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 can 
be obtained by calling 5 1 1 or visiting the MDT Road Report website.

&&

$$

MTZ008-015-055-121800-
/O.EXT.KTFX.WW.Y.0043.000000T0000Z-211214T1200Z/
Beaverhead-Madison-Gallatin-
Including the following locations: Twin Bridges, West
Yellowstone, Virginia City, Bozeman Pass, Raynolds Pass, Dillon,
Big Hole Pass, Bozeman Apt, Chief Joseph Pass, Wisdom, Norris
Hill, Wise River, Monida Pass, Battle Ridge Pass, Ennis, Targhee
Pass, and City of Bozeman
221 AM MST Sun Dec 12 2021

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 AM MST TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 8 
  inches, with up to 12 inches over mountain passes along the Idaho 
  border. Winds gusting as high as 60 mph at times near the higher 
  peaks.

* WHERE...Beaverhead, Gallatin and Madison Counties.

* WHEN...Until 5 AM MST Tuesday.

* IMPACTS...Travel could be difficult, especially over Chief Joseph, 
  Raynolds, and Targhee Passes. Blowing snow could significantly 
  reduce visibility at times.

* ADDITIONAL DETAILS...This advisory does not include the cities of 
  Bozeman, Dillon, or Ennis; in addition to Bozeman Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by calling 5 1 1 or visiting the MDT Road 
Report website.

&&

$$

MTZ014-048-121800-
/O.CON.KTFX.WW.Y.0043.000000T0000Z-211212T1800Z/
Central and Southern Lewis and Clark-Southern Rocky Mountain
Front-
Including the following locations: Lincoln, Choteau, Bynum,
Augusta, MacDonald Pass, Rogers Pass, and Flesher Pass
221 AM MST Sun Dec 12 2021

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

* WHAT...Snow. Additional snow accumulations of 2 to 4 inches, with 
  higher amounts in the mountains. Winds gusting as high as 40 mph.

* WHERE...Lewis and Clark County and the Southern Rocky Mountain 
  Front.

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

* IMPACTS...Travel could be difficult, especially over Rogers Pass 
  and on secondary roads along the immediate Rocky Mountain Front. 
  Blowing snow could significantly reduce visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by calling 5 1 1 or visiting the MDT Road 
Report website.

&&

$$

RG
771 
WWUS45 KTFX 121742
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
1042 AM MST Sun Dec 12 2021

MTZ009-121845-
/O.EXP.KTFX.WS.W.0006.000000T0000Z-211212T1800Z/
Northern Rocky Mountain Front-
Including the following locations: Logan Pass, Heart Butte,
Browning, and Marias Pass
1042 AM MST Sun Dec 12 2021

...WINTER STORM WARNING WILL EXPIRE AT 11 AM MST THIS MORNING...

Widespread snow and blowing snow has diminished so the Winter Storm 
Warning will be allowed to expire. However, periods of light snow 
with patchy blowing and drifting will continue into Monday.

$$

MTZ014-048-121845-
/O.EXP.KTFX.WW.Y.0043.000000T0000Z-211212T1800Z/
Central and Southern Lewis and Clark-Southern Rocky Mountain
Front-
Including the following locations: Lincoln, Choteau, Bynum,
Augusta, MacDonald Pass, Rogers Pass, and Flesher Pass
1042 AM MST Sun Dec 12 2021

...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS MORNING...

Widespread snow and blowing snow has diminished so the Winter 
Weather Advisory will be allowed to expire. However, periods of 
light snow will continue into Monday.

$$

MTZ008-015-055-131200-
/O.CON.KTFX.WW.Y.0043.000000T0000Z-211214T1200Z/
Beaverhead-Madison-Gallatin-
Including the following locations: Twin Bridges, West
Yellowstone, Virginia City, Bozeman Pass, Raynolds Pass, Dillon,
Big Hole Pass, Bozeman Apt, Chief Joseph Pass, Wisdom, Norris
Hill, Wise River, Monida Pass, Battle Ridge Pass, Ennis, Targhee
Pass, and City of Bozeman
1042 AM MST Sun Dec 12 2021

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

* WHAT...Snow expected. Total snow accumulations between 3 and 8 
  inches, with up to 12 inches over mountain passes along the Idaho 
  border. Winds gusting as high as 60 mph at times near the higher 
  peaks.

* WHERE...Elevations above 6500 feet in Beaverhead, Gallatin and 
  Madison Counties.

* WHEN...Until 5 AM MST Tuesday.

* IMPACTS...Travel could be difficult, especially over Chief Joseph, 
  Raynolds, and Targhee Passes. Blowing snow could significantly 
  reduce visibility at times.

* ADDITIONAL DETAILS...This advisory does not include the cities of 
  Bozeman, Dillon, or Ennis; in addition to Bozeman Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by calling 5 1 1 or visiting the MDT Road 
Report website.

&&

$$

mpj

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.