Alert archive / Montana / Winter Storm Warnings in 2020
Winter Storm Warning 2, NWS Missoula, MT
NWS Missoula, MT issued this winter storm warning at Jan 7, 2020, 8:21 AM MST for 5 counties in Montana. It was in force for 9 hr. 4 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
- Jan 7, 2020, 8:21 AM MST (15:21 UTC)
- Expired
- Jan 7, 2020, 5:00 PM MST
- In force
- 9 hr
- Issued by
- NWS Missoula, MT
Counties Flathead County, MT, Lake County, MT, Mineral County, MT, Missoula County, MT, Sanders County, MT
The radar
The Missoula radar (KMSX), 67 km from the middle of the area, began a volume at 15:24 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 7, 8:30 AM MST | SNOW 12 | Seeley Lake, MT | SEELEY LAKE RANGER STATION REPORTS 10 TO 12 INCHES OF NEW SNOW OVERNIGHT. RAIN IS NOW FALLING THIS MORNING. |
| Jan 7, 8:55 AM MST | SNOW 2.3 | 1 Sw Columbia Falls, MT | RAIN FALLING THIS MORNING. |
| Jan 7, 10:31 AM MST | SNOW 6 | Trout Creek, MT | 6 INCHES OF SNOW OVERNIGHT. MIX OF RAIN AND SNOW THIS MORNING. |
| Jan 7, 11:10 AM MST | HEAVY SNOW 18 | Polebridge, MT | SNOW STARTED SOMETIME BEFORE 6:30 AM (1/7) & HAS NOT STOPPED. 18 INCHES OF LIGHT POWDER BY LAST NIGHT, THEN SNOW GOT WETTER & IS COMPACTING. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 3.4 hours before the alert went out and 148 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 922 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 134 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
826 WWUS45 KMSO 071521 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 821 AM MST Tue Jan 7 2020 MTZ003-071630- /O.CAN.KMSO.WW.Y.0002.000000T0000Z-200107T1600Z/ Flathead/Mission Valleys- 821 AM MST Tue Jan 7 2020 ...WINTER WEATHER ADVISORY IS CANCELLED... $$ MTZ004-081200- /O.NEW.KMSO.WS.W.0002.200107T1521Z-200107T1900Z/ /O.CON.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ Lower Clark Fork Region- 821 AM MST Tue Jan 7 2020 ...WINTER STORM WARNING IN EFFECT UNTIL NOON MST TODAY... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST WEDNESDAY... * WHAT...For the Winter Storm Warning, heavy snow. Additional snow accumulations of 4 to 7 inches above 4000 feet, including Lookout Pass, 1 to 3 inches and a mix of snow and freezing rain below 4000 feet. For the Winter Weather Advisory, snow. Additional snow accumulations of 4 to 6 inches above 4000 feet during the afternoon and evening. * WHERE...Evaro Hill, Highway 200 Thompson Falls to Plains, Highway 200 Trout Creek to Heron, and I-90 Lookout Pass to Haugan. * WHEN...For the Winter Storm Warning, until noon MST today. For the Winter Weather Advisory, until 5 AM MST Wednesday. * IMPACTS...Travel will be very difficult west of Saint Regis and over Lookout Pass through this morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ001-071900- /O.EXT.KMSO.WW.Y.0002.000000T0000Z-200107T1900Z/ Kootenai/Cabinet Region- 821 AM MST Tue Jan 7 2020 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL NOON MST TODAY... * WHAT...Mixed precipitation. Additional snow accumulations of 1 to 3 inches. Light ice accumulations possible. * WHERE...Highway 2 Kalispell to Libby, Highway 37 Eureka to Libby, Highway 56 Bull Lake Road, and Highway 93 Eureka to Whitefish. * WHEN...Until noon MST today. * IMPACTS...Travel could be affected. 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. && $$ MTZ002-081200- /O.CON.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ West Glacier Region- 821 AM MST Tue Jan 7 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST WEDNESDAY... * WHAT...Snow. Additional snow accumulations of 6 to 9 inches above 4000 feet, and 2 to 4 inches below 4000 feet. Winds gusting as high as 35 mph. * WHERE...Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, and Polebridge. * WHEN...Until 5 AM MST Wednesday. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ005-006-081200- /O.CON.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ Northern Clearwater Mountains-Southern Clearwater Mountains- 721 AM PST Tue Jan 7 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST WEDNESDAY... * WHAT...Snow. Additional snow accumulations of 3 to 6 inches above 4000 feet. * WHERE...Elk River, Highway 11 Pierce to Headquarters, Pierce, Dixie, Elk City, and Highway 12 Lowell to Lolo Pass. * WHEN...Until 4 AM PST Wednesday. * IMPACTS...Travel could be affected. 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. && $$ MTZ006-081200- /O.CON.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ Bitterroot/Sapphire Mountains- 821 AM MST Tue Jan 7 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST WEDNESDAY... * WHAT...Snow. Additional snow accumulations of 3 to 6 inches. * WHERE...Bitterroot/Sapphire Mountains. * WHEN...Until 5 AM MST Wednesday. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ043-081200- /O.CON.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ Potomac/Seeley Lake Region- 821 AM MST Tue Jan 7 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST WEDNESDAY... * WHAT...Snow. Additional snow accumulations of 4 to 6 inches. * WHERE...Highway 200 Bonner to Greenough, Highway 83 Seeley Lake to Condon, and I-90 East Missoula to Bearmouth. * WHEN...Until 5 AM MST Wednesday. * IMPACTS...Travel could be affected. 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. && $$
3 follow-up statements
873 WWUS45 KMSO 071816 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 1116 AM MST Tue Jan 7 2020 MTZ002-081200- /O.EXB.KMSO.WS.W.0002.000000T0000Z-200108T0000Z/ /O.CON.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ West Glacier Region- 1116 AM MST Tue Jan 7 2020 ...WINTER STORM WARNING IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST WEDNESDAY... * WHAT...For the Winter Storm Warning, heavy snow. Additional snow accumulations of 4 to 8 inches above 4,000 feet, with 1 to 3 inches below 4,000 feet. Wind gusts up to 30 mph will cause periodic periods of blowing snow near Marias Pass. For the Winter Weather Advisory, snow. Additional snow accumulations of 3 to 6 inches tonight into Wednesday morning. * WHERE...Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, and Polebridge. * WHEN...For the Winter Storm Warning, until 5 PM MST this afternoon. For the Winter Weather Advisory, until 5 AM MST Wednesday. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ004-081200- /O.CON.KMSO.WS.W.0002.000000T0000Z-200107T1900Z/ /O.CON.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ Lower Clark Fork Region- 1116 AM MST Tue Jan 7 2020 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST WEDNESDAY... * WHAT...For the Winter Storm Warning, heavy snow. Additional snow accumulations of 1 to 3 inches above 4000 feet, including Lookout Pass; Up to one inch and a mix of snow and freezing rain below 4000 feet. For the Winter Weather Advisory, snow. Additional snow accumulations of 4 to 6 inches above 4000 feet during the afternoon and evening. * WHERE...Evaro Hill, Highway 200 Thompson Falls to Plains, Highway 200 Trout Creek to Heron, and I-90 Lookout Pass to Haugan. * WHEN...For the Winter Storm Warning, until noon MST today. For the Winter Weather Advisory, until 5 AM MST Wednesday. * IMPACTS...Travel will be very difficult west of Saint Regis and over Lookout Pass through this morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. 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. && $$ IDZ005-006-081200- /O.CON.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ Northern Clearwater Mountains-Southern Clearwater Mountains- 1016 AM PST Tue Jan 7 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST WEDNESDAY... * WHAT...Snow. Additional snow accumulations of 3 to 6 inches above 4000 feet. * WHERE...Elk River, Highway 11 Pierce to Headquarters, Pierce, Dixie, Elk City, and Highway 12 Lowell to Lolo Pass. * WHEN...Until 4 AM PST Wednesday. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ001-071930- /O.CON.KMSO.WW.Y.0002.000000T0000Z-200107T1900Z/ Kootenai/Cabinet Region- 1116 AM MST Tue Jan 7 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY... * WHAT...Mixed precipitation. Additional snow accumulations of 1 to 3 inches. Light ice accumulations possible. * WHERE...Highway 2 Kalispell to Libby, Highway 37 Eureka to Libby, Highway 56 Bull Lake Road, and Highway 93 Eureka to Whitefish. * WHEN...Until noon MST today. * IMPACTS...Travel could be affected. 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. && $$ MTZ006-081200- /O.CON.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ Bitterroot/Sapphire Mountains- 1116 AM MST Tue Jan 7 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST WEDNESDAY... * WHAT...Snow. Additional snow accumulations of 3 to 6 inches. * WHERE...Bitterroot/Sapphire Mountains. * WHEN...Until 5 AM MST Wednesday. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ043-081200- /O.CON.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ Potomac/Seeley Lake Region- 1116 AM MST Tue Jan 7 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST WEDNESDAY... * WHAT...Snow. Additional snow accumulations of 4 to 6 inches. * WHERE...Highway 200 Bonner to Greenough, Highway 83 Seeley Lake to Condon, and I-90 East Missoula to Bearmouth. * WHEN...Until 5 AM MST Wednesday. * IMPACTS...Travel could be affected. 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. && $$
957 WWUS45 KMSO 071854 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 1154 AM MST Tue Jan 7 2020 MTZ004-081200- /O.EXP.KMSO.WS.W.0002.000000T0000Z-200107T1900Z/ /O.CON.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ Lower Clark Fork Region- 1154 AM MST Tue Jan 7 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST WEDNESDAY... * WHAT...Snow. Additional snow accumulations of 3 to 6 inches tonight into Wednesday morning above 4000 feet. * WHERE...Evaro Hill, Highway 200 Thompson Falls to Plains, Highway 200 Trout Creek to Heron, and I-90 Lookout Pass to Haugan. * WHEN...Winter Weather Advisory, until 5 AM MST Wednesday. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ001-072000- /O.EXP.KMSO.WW.Y.0002.000000T0000Z-200107T1900Z/ Kootenai/Cabinet Region- 1154 AM MST Tue Jan 7 2020 ...WINTER WEATHER ADVISORY WILL EXPIRE AT NOON MST TODAY... $$ MTZ002-081200- /O.CON.KMSO.WS.W.0002.000000T0000Z-200108T0000Z/ /O.CON.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ West Glacier Region- 1154 AM MST Tue Jan 7 2020 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST WEDNESDAY... * WHAT...For the Winter Storm Warning, heavy snow. Additional snow accumulations of 3 to 7 inches above 4,000 feet, with 1 to 3 inches below 4,000 feet. Wind gusts up to 30 mph will cause periodic periods of blowing snow near Marias Pass. For the Winter Weather Advisory, snow. Additional snow accumulations of 3 to 6 inches tonight into Wednesday morning. * WHERE...Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, and Polebridge. * WHEN...For the Winter Storm Warning, until 5 PM MST this afternoon. For the Winter Weather Advisory, until 5 AM MST Wednesday. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ005-006-081200- /O.CON.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ Northern Clearwater Mountains-Southern Clearwater Mountains- 1054 AM PST Tue Jan 7 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST WEDNESDAY... * WHAT...Snow. Additional snow accumulations of 3 to 6 inches above 4000 feet tonight. * WHERE...Elk River, Highway 11 Pierce to Headquarters, Pierce, Dixie, Elk City, and Highway 12 Lowell to Lolo Pass. * WHEN...Until 4 AM PST Wednesday. * IMPACTS...Travel could be affected. 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. && $$ MTZ006-081200- /O.CON.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ Bitterroot/Sapphire Mountains- 1154 AM MST Tue Jan 7 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST WEDNESDAY... * WHAT...Snow. Additional snow accumulations of 3 to 6 inches tonight. * WHERE...Bitterroot/Sapphire Mountains. * WHEN...Until 5 AM MST Wednesday. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ043-081200- /O.CON.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ Potomac/Seeley Lake Region- 1154 AM MST Tue Jan 7 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST WEDNESDAY... * WHAT...Snow. Additional snow accumulations of 1 to 3 inches. * WHERE...Highway 200 Bonner to Greenough, Highway 83 Seeley Lake to Condon, and I-90 East Missoula to Bearmouth. * WHEN...Until 5 AM MST Wednesday. * IMPACTS...Travel could be affected. 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. && $$
957 WWUS45 KMSO 072342 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 442 PM MST Tue Jan 7 2020 MTZ002-081200- /O.EXP.KMSO.WS.W.0002.000000T0000Z-200108T0000Z/ /O.CON.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ West Glacier Region- 442 PM MST Tue Jan 7 2020 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST WEDNESDAY... ...WINTER STORM WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON... * WHAT...Snow. Additional snow accumulations of 3 to 5 inches. * WHERE...Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, and Polebridge. * WHEN...Until 5 AM MST Wednesday. * IMPACTS...Travel could be affected. && $$ IDZ005-006-MTZ004-006-043-080045- /O.CAN.KMSO.WW.Y.0002.000000T0000Z-200108T1200Z/ Northern Clearwater Mountains-Southern Clearwater Mountains- Lower Clark Fork Region-Bitterroot/Sapphire Mountains- Potomac/Seeley Lake Region- 442 PM MST Tue Jan 7 2020 /342 PM PST Tue Jan 7 2020/ ...WINTER WEATHER ADVISORY IS CANCELLED... $$
Nearby
Winter Storm Warnings in Montana, 2020Every winter storm warning in 2020
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.