Alert archive / Montana / Winter Storm Warnings in 2021
Winter Storm Warning 8, NWS Great Falls, MT
NWS Great Falls, MT issued this winter storm warning at Dec 18, 2021, 3:08 AM MST. It took effect at Dec 18, 2021, 12:00 PM MST. It was in force for 26 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 18, 2021, 3:08 AM MST (10:08 UTC)
- In effect from
- Dec 18, 2021, 12:00 PM MST
- Expired
- Dec 19, 2021, 1:44 PM MST
- In force
- 26 hr
- Issued by
- NWS Great Falls, MT
The text
As transmitted.
088 WWUS45 KTFX 181008 WSWTFX URGENT - WINTER WEATHER MESSAGE National Weather Service Great Falls MT 308 AM MST Sat Dec 18 2021 MTZ009-182300- /O.CAN.KTFX.WC.Y.0004.000000T0000Z-211218T1200Z/ /O.UPG.KTFX.WS.A.0008.211219T0000Z-211219T1800Z/ /O.NEW.KTFX.WS.W.0008.211218T1900Z-211219T1900Z/ Northern Rocky Mountain Front- Including the following locations: Logan Pass, Heart Butte, Browning, and Marias Pass 308 AM MST Sat Dec 18 2021 ...WINTER STORM WARNING IN EFFECT FROM NOON TODAY TO NOON MST SUNDAY FOR ELEVATIONS ABOVE 4500 FEET... ...WIND CHILL ADVISORY IS CANCELLED... * WHAT...Heavy snow expected for elevations above 4500 feet. Total snow accumulations between 3 and 6 inches at lower elevations with up to 18 inches likely at higher elevations. Winds gusting as high as 85 mph. * WHERE...Northern Rocky Mountain Front. * WHEN...From Noon today to Noon MST Sunday. * IMPACTS...Visibilities may drop below 1/4 mile due to falling and blowing snow. Travel could be very difficult. Widespread 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 can be obtained by calling 5 1 1 or visiting the MDT Road Report website. && $$ MTZ010-011-044>047-181115- /O.CAN.KTFX.WC.Y.0004.000000T0000Z-211218T1200Z/ Eastern Glacier-Hill-Toole-Liberty-Eastern Pondera-Blaine- Including the following locations: Hays, Harlem, Brady, Shelby, Rudyard, Rocky Boy, Whitlash, Havre, Cut Bank, Chester, Chinook, Conrad, and Sunburst 308 AM MST Sat Dec 18 2021 ...WIND CHILL ADVISORY IS CANCELLED... Temperatures will gradually warm this morning with winds remaining generally below 10 mph. As such, the Wind Chill Advisory is cancelled. $$ MTZ048-182300- /O.UPG.KTFX.WS.A.0008.211219T0000Z-211219T1800Z/ /O.NEW.KTFX.WS.W.0008.211218T1900Z-211219T1900Z/ Southern Rocky Mountain Front- 308 AM MST Sat Dec 18 2021 ...WINTER STORM WARNING IN EFFECT FROM NOON TODAY TO NOON MST SUNDAY FOR ELEVATIONS ABOVE 4500 FEET... * WHAT...Heavy snow expected for elevations above 4500 feet. Total snow accumulations between 2 and 4 inches at lower elevations with up to 12 inches likely at higher elevations. * WHERE...Southern Rocky Mountain Front. * WHEN...From Noon today to Noon MST Sunday. * IMPACTS...Visibilities may drop below 1/4 mile due to falling and blowing snow. Travel could be very difficult. Widespread 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 can be obtained by calling 5 1 1 or visiting the MDT Road Report website. && $$ mpj
3 follow-up statements
714 WWUS45 KTFX 181959 WSWTFX URGENT - WINTER WEATHER MESSAGE National Weather Service Great Falls MT 1259 PM MST Sat Dec 18 2021 MTZ009-048-191200- /O.NEW.KTFX.WW.Y.0046.211218T1959Z-211219T2200Z/ /O.EXT.KTFX.WS.W.0008.000000T0000Z-211219T2200Z/ Northern Rocky Mountain Front-Southern Rocky Mountain Front- Including the following locations: Marias Pass, Choteau, Browning, Heart Butte, Bynum, Augusta, and Logan Pass 1259 PM MST Sat Dec 18 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 3 PM MST SUNDAY FOR ELEVATIONS BELOW 4500 FEET... ...WINTER STORM WARNING NOW IN EFFECT UNTIL 3 PM MST SUNDAY FOR ELEVATIONS ABOVE 4500 FEET... * WHAT...For the Winter Weather Advisory for elevations below 4500 feet, snow. Additional snow accumulations between 1 and 4 inches. For the Winter Storm Warning for elevations above 4500 feet, heavy snow. Additional snow accumulations between 3 and 6 inches, with 6 to 12 inches over Marias Pass and locally higher in the mountains. Winds gusting as high as 85 mph. * WHERE...The Rocky Mountain Front. * WHEN...Until 3 PM MST Sunday. * IMPACTS...Visibilities may drop below 1/4 mile due to falling and blowing snow. Travel could be very difficult. Widespread blowing snow could significantly reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions can be obtained by calling 5 1 1 or visiting the MDT Road Report website. && $$ MTZ012>014-049>054-191200- /O.NEW.KTFX.WW.Y.0046.211219T1200Z-211220T1200Z/ Cascade-Chouteau-Central and Southern Lewis and Clark-Eastern Teton-Judith Basin-Fergus-Jefferson-Broadwater-Meagher- Including the following locations: Deep Creek Pass, Raynesford, Martinsdale, Fairfield, MacDonald Pass, Rogers Pass, Townsend, Boulder, Lewistown Divide, Whitehall, Great Falls, Boulder Hill, Lewistown, Flesher Pass, Kings Hill Pass, Lincoln, Montana City, Stanford, Cascade, Grass Range, Dutton, Elk Park Pass, Toston, Big Sandy, Carter, Winston, Winifred, Helena, Fort Benton, White Sulphur Springs, Belt, and Hobson 1259 PM MST Sat Dec 18 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM SUNDAY TO 5 AM MST MONDAY... * WHAT...Snow expected. Total snow accumulations between 2 and 6 inches at lower elevations, with 6 to 12 inches over mountain passes. * WHERE...Portions of central, north central, southwest, and west central Montana. * WHEN...From 5 AM Sunday to 5 AM MST Monday. * IMPACTS...Travel could be difficult. Visibility could be significantly reduced in areas of heavy snow. 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. && $$ Moldan
655 WWUS45 KTFX 191030 WSWTFX URGENT - WINTER WEATHER MESSAGE National Weather Service Great Falls MT 330 AM MST Sun Dec 19 2021 MTZ009-048-192200- /O.CON.KTFX.WS.W.0008.000000T0000Z-211219T2200Z/ /O.CON.KTFX.WW.Y.0046.000000T0000Z-211219T2200Z/ Northern Rocky Mountain Front-Southern Rocky Mountain Front- Including the following locations: Marias Pass, Bynum, Choteau, Logan Pass, Heart Butte, Browning, and Augusta 330 AM MST Sun Dec 19 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MST THIS AFTERNOON FOR ELEVATIONS ABOVE 4500 FEET... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 3 PM MST THIS AFTERNOON FOR ELEVATIONS BELOW 4500 FEET... * WHAT...For the Winter Storm Warning for elevations above 4500 feet, heavy snow. Additional snow accumulations up to 5 inches. Winds gusting as high as 45 mph. For the Winter Weather Advisory for elevations below 4500 feet, snow. Additional snow accumulations up to one inch. Winds gusting as high as 40 mph. * WHERE...The Rocky Mountain Front. * WHEN...Until 3 PM MST this afternoon. * IMPACTS...Visibilities may drop below 1/4 mile due to falling and blowing snow. Travel could be very difficult. Widespread blowing snow could significantly reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions can be obtained by calling 5 1 1 or visiting the MDT Road Report website. && $$ MTZ012>014-049>054-200000- /O.CON.KTFX.WW.Y.0046.211219T1200Z-211220T1200Z/ Cascade-Chouteau-Central and Southern Lewis and Clark-Eastern Teton-Judith Basin-Fergus-Jefferson-Broadwater-Meagher- Including the following locations: Deep Creek Pass, Raynesford, Martinsdale, Fairfield, MacDonald Pass, Rogers Pass, Townsend, Boulder, Lewistown Divide, Whitehall, Great Falls, Boulder Hill, Lewistown, Flesher Pass, Kings Hill Pass, Lincoln, Montana City, Stanford, Cascade, Grass Range, Dutton, Elk Park Pass, Toston, Big Sandy, Carter, Winston, Winifred, Helena, Fort Benton, White Sulphur Springs, Belt, and Hobson 330 AM MST Sun Dec 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST MONDAY... * WHAT...Snow expected. Total snow accumulations between 2 and 6 inches at lower elevations, with 6 to 12 inches over mountain passes. * WHERE...Portions of central, north central, southwest, and west central Montana. * WHEN...Until 5 AM MST Monday. * IMPACTS...Travel could be difficult. Visibility could be significantly reduced in areas of heavy snow. 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. && $$ AM
605 WWUS45 KTFX 192044 WSWTFX URGENT - WINTER WEATHER MESSAGE National Weather Service Great Falls MT 144 PM MST Sun Dec 19 2021 MTZ009-048-201200- /O.CAN.KTFX.WS.W.0008.000000T0000Z-211219T2200Z/ /O.EXT.KTFX.WW.Y.0046.000000T0000Z-211220T1200Z/ Northern Rocky Mountain Front-Southern Rocky Mountain Front- Including the following locations: Marias Pass, Bynum, Choteau, Browning, Heart Butte, Logan Pass, and Augusta 144 PM MST Sun Dec 19 2021 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 AM MST MONDAY... * WHAT...Snow. Additional snow accumulations between 1 and 3 inches. * WHERE...The Rocky Mountain Front. * WHEN...Until 5 AM MST Monday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1 or visiting the MDT Road Report website. && $$ MTZ012>014-049>054-201200- /O.CON.KTFX.WW.Y.0046.000000T0000Z-211220T1200Z/ Cascade-Chouteau-Central and Southern Lewis and Clark-Eastern Teton-Judith Basin-Fergus-Jefferson-Broadwater-Meagher- Including the following locations: Deep Creek Pass, Raynesford, Martinsdale, Fairfield, MacDonald Pass, Rogers Pass, Townsend, Boulder, Lewistown Divide, Whitehall, Great Falls, Boulder Hill, Lewistown, Flesher Pass, Kings Hill Pass, Lincoln, Montana City, Stanford, Cascade, Grass Range, Dutton, Elk Park Pass, Toston, Big Sandy, Carter, Winston, Winifred, Helena, Fort Benton, White Sulphur Springs, Belt, and Hobson 144 PM MST Sun Dec 19 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST MONDAY... * WHAT...Snow. Additional snow accumulations between 1 and 6 inches at lower elevations, with up to 9 inches over mountain passes. * WHERE...Portions of central, north central, southwest, and west central Montana. * WHEN...Until 5 AM MST Monday. * IMPACTS...Travel could be difficult. Visibility could be significantly reduced in areas of heavy snow. * ADDITIONAL DETAILS...Heaviest period of snowfall is expected from this evening through early Monday morning. 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. && $$ Moldan
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 18, 3:09 AM MST | High Wind Warning | TFX | 24 hr | |
| Dec 18, 12:59 PM MST | Winter Weather Advisory | TFX | 38 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.