Alert archive / Montana / Winter Storm Warnings in 2021
Winter Storm Warning 11, NWS Missoula, MT
NWS Missoula, MT issued this winter storm warning at Dec 14, 2021, 6:40 AM PST for Clearwater County, Idaho County, Idaho; 4 counties in Montana. It was in force for 14 hr. 8 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 14, 2021, 6:40 AM PST (14:40 UTC)
- Expired
- Dec 14, 2021, 8:44 PM PST
- In force
- 14 hr
- Issued by
- NWS Missoula, MT
Counties Clearwater County, ID, Idaho County, ID, Deer Lodge County, MT, Granite County, MT, Powell County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 84 km from the middle of the area, began a volume at 14:39 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 |
|---|---|---|---|
| Dec 14, 7:09 AM PST | HEAVY SNOW 11 | Grangeville, ID | SOCIAL MEDIA POST WITH A PICTURE OF A RULER STUCK IN THE SNOW. |
| Dec 14, 7:45 AM PST | SNOW 2 | Kooskia, ID | 2 INCHES IN TOWN, ABOUT 4 INCHES ESTIMATED AT 2,400 FT OUTSIDE OF TOWN. FACEBOOK COMMENT. |
| Dec 14, 8:21 AM PST | HEAVY SNOW 11.8 | Grangeville, ID | SECOND REPORT FROM GRANGEVILLE ON SOCIAL MEDIA WITH A PICTURE OF A RULER IN THE SNOW. |
| Dec 14, 10:15 AM PST | HEAVY SNOW 8 | 1 Ese Cottonwood, ID | SOCIAL MEDIA POST WITH PICTURE OF RULER IN THE SNOW AT 8 INCHES. |
| Dec 14, 2:35 PM PST | HEAVY SNOW 2 | 3 Nne Newcomb, MT | SNOW SQUALL. KBTM REPORTED VISIBILITY BELOW 0.25 MILE AND WIND GUSTS TO 30 MPH. TEMPERATURES DROPPED FROM THE LOW 40S TO 28F AS THE SQUALL PUSHED THROUGH. BROADCAST MEDIA REPORTED 2 INCHES OF SNOW IN BUTTE DURING A 30 MINUTE PERIOD. |
| Dec 14, 3:24 PM PST | HEAVY SNOW 2 | 4 Ene Janney, MT | SNOW SQUALL. INTERSTATE 90 WAS CLOSED BETWEEN MILE MARKER 226 AND 243 EAST OF BUTTE OVER HOMESTAKE PASS FROM 424 PM TO 550PM DUE TO HEAVY SNOW. ROAD SURFACE TEMPERATURES DROPPED FROM THE UPPER 30S TO 31F AT NEARBY MTHOM MESONET STATION. |
| Dec 14, 3:30 PM PST | HEAVY SNOW 2 | 2 Sw Newcomb, MT | 2.0 INCHES OF SNOW FELL IN 30 MINUTES BETWEEN 4 AND 4:30PM. SNOW WAS ACCOMPANIED BY WINDS GUSTING TO 29 MPH. WHITE OUT CONDITIONS OCCURRED DURING THIS TIME. |
| Dec 14, 8:00 PM PST | HEAVY SNOW 16 | 5 Sse Grangeville, ID | 24 HOUR SNOWFALL OF 16 TO 20 INCHES AROUND FISH CREEK CAMPGROUND AREA. |
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, 2.7 hours before the alert went out and 248 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
- 71 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
929 WWUS45 KMSO 141440 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 740 AM MST Tue Dec 14 2021 IDZ007-150100- /O.UPG.KMSO.WW.Y.0066.000000T0000Z-211214T1800Z/ /O.NEW.KMSO.WS.W.0011.211214T1440Z-211215T0100Z/ Orofino/Grangeville Region- 640 AM PST Tue Dec 14 2021 ...WINTER STORM WARNING IN EFFECT UNTIL 5 PM PST THIS AFTERNOON... * WHAT...Heavy snow. Additional snow accumulations of 2 to 5 inches on the Camas Prairie...especially around Grangeville. Snow accumulations of 1 to 3 inches in the lower valleys. * WHERE...Camas Prairie, Grangeville and vicinity, and Greer Grade. * WHEN...Until 5 PM PST this afternoon. * 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. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ005-006-MTZ006-150100- /O.EXT.KMSO.WW.Y.0066.000000T0000Z-211215T0100Z/ Northern Clearwater Mountains-Southern Clearwater Mountains- Bitterroot/Sapphire Mountains- 740 AM MST Tue Dec 14 2021 /640 AM PST Tue Dec 14 2021/ ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 6 PM MST /5 PM PST/ THIS EVENING... * WHAT...Snow expected. Total snow accumulations of 3 to 7 inches. * WHERE...Elk River, Highway 11 Pierce to Headquarters, Pierce, Dixie, Elk City, Highway 12 Lowell to Lolo Pass, Highway 93 Sula to Lost Trail Pass, and Lolo Pass. * WHEN...Until 6 PM MST /5 PM PST/ this evening. * IMPACTS...Travel could be affected. Patchy blowing snow could significantly reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ008-150100- /O.EXT.KMSO.WW.Y.0066.000000T0000Z-211215T0100Z/ Lower Hells Canyon/Salmon River Region- 640 AM PST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 PM PST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches in the higher elevations. 1 to 3 inches in the lower valleys. * WHERE...Highway 95 Slate Creek to Riggins, and White Bird Grade. * WHEN...Until 5 PM PST this afternoon. * IMPACTS...Travel could be very difficult. 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. && $$ MTZ005-141800- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211214T1800Z/ Missoula/Bitterroot Valleys- 740 AM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * WHAT...Mixed precipitation expected. Total snow accumulations of up to two inches and ice accumulations of a light glaze. Wintry mix becoming snow for the morning commute. * WHERE...Missoula/Bitterroot Valleys. * WHEN...Until 11 AM MST Tuesday. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ004-141800- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211214T1800Z/ Lower Clark Fork Region- 740 AM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * WHAT...Mixed precipitation expected. Total snow accumulations of 2 to 5 inches and ice accumulations of a light glaze. Wintry mix becoming snow for the morning commute. * WHERE...Evaro Hill, Highway 200 Thompson Falls to Plains, Highway 200 Trout Creek to Heron, and I-90 Lookout Pass to Haugan. * WHEN...Until 11 AM MST Tuesday. * 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. && $$ MTZ043-141800- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211214T1800Z/ Potomac/Seeley Lake Region- 740 AM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * WHAT...Mixed precipitation expected. Total snow accumulations of 2 to 4 inches and ice accumulations of a light glaze. Wintry mix becoming snow for the morning commute. * WHERE...Highway 200 Bonner to Greenough, Highway 83 Seeley Lake to Condon, and I-90 East Missoula to Bearmouth. * WHEN...Until 11 AM MST Tuesday. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ003-141800- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211214T1800Z/ Flathead/Mission Valleys- 740 AM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * WHAT...Mixed precipitation expected. Total snow accumulations of 1 to 3 inches and ice accumulations of a light glaze. Wintry mix becoming snow for the morning commute. * WHERE...Flathead Lake, Flathead Valley, Mission Valley, and Polson. * WHEN...Until 11 AM MST Tuesday. * 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. && $$ MTZ001-141800- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211214T1800Z/ Kootenai/Cabinet Region- 740 AM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * WHAT...Mixed precipitation expected. Total snow accumulations of 2 to 5 inches and ice accumulations of a light glaze. Wintry mix becoming snow for the morning commute. * WHERE...Highway 2 Kalispell to Libby, Highway 37 Eureka to Libby, Highway 56 Bull Lake Road, and Highway 93 Eureka to Whitefish. * WHEN...From 5 PM this afternoon to 11 AM MST Tuesday. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ002-141800- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211214T1800Z/ West Glacier Region- 740 AM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * WHAT...Mixed precipitation expected. Total snow accumulations of 2 to 5 inches and ice accumulations of a light glaze. Wintry mix becoming snow for the morning commute. * WHERE...Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, and Polebridge. * WHEN...From 5 PM this afternoon to 11 AM MST Tuesday. * 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. && $$ IDZ009-010-141800- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211214T1800Z/ Western Lemhi County-Eastern Lemhi County- 740 AM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * WHAT...Snow expected. Total snow accumulations of 2 to 4 inches. Winds gusting up to 35 mph in the higher terrain and from Leadore to points south. * WHERE...Shoup, Bannock Pass, Highway 28 Tendoy to Lone Pine, Highway 93 Lost Trail Pass to Gibbonsville, Lemhi Pass, and Salmon. * WHEN...From 5 PM this afternoon to 11 AM MST Tuesday. * IMPACTS...Travel could be affected. Patchy blowing snow could significantly reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ007-150000- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211215T0000Z/ Butte/Blackfoot Region- 740 AM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 1 to 3 inches. Higher amounts around Anaconda possible. * WHERE...Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...From 5 PM this afternoon to 5 PM MST Tuesday. * 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. && $$
7 follow-up statements
315 WWUS45 KMSO 141838 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 1138 AM MST Tue Dec 14 2021 IDZ007-150100- /O.CON.KMSO.WS.W.0011.000000T0000Z-211215T0100Z/ Orofino/Grangeville Region- 1038 AM PST Tue Dec 14 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PST THIS AFTERNOON... * WHAT...Heavy snow. Additional snow accumulations of 2 to 5 inches on the Camas Prairie...especially around Grangeville. Snow accumulations of 1 to 3 inches in the lower valleys. * WHERE...Camas Prairie, Grangeville and vicinity, and Greer Grade. * WHEN...Until 5 PM PST this afternoon. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ043-150100- /O.NEW.KMSO.WW.Y.0067.211214T1838Z-211215T0100Z/ Potomac/Seeley Lake Region- 1138 AM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM MST THIS EVENING... * 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 6 PM MST this evening. * 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. && $$ IDZ005-006-MTZ006-150100- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211215T0100Z/ Northern Clearwater Mountains-Southern Clearwater Mountains- Bitterroot/Sapphire Mountains- 1138 AM MST Tue Dec 14 2021 /1038 AM PST Tue Dec 14 2021/ ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MST /5 PM PST/ THIS EVENING... * WHAT...Snow expected. Total snow accumulations of 3 to 7 inches. * WHERE...Elk River, Highway 11 Pierce to Headquarters, Pierce, Dixie, Elk City, Highway 12 Lowell to Lolo Pass, Highway 93 Sula to Lost Trail Pass, and Lolo Pass. * WHEN...Until 6 PM MST /5 PM PST/ this evening. * IMPACTS...Travel could be affected. Patchy blowing snow could significantly reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ008-150100- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211215T0100Z/ Lower Hells Canyon/Salmon River Region- 1038 AM PST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM PST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches in the higher elevations. 1 to 3 inches in the lower valleys. * WHERE...Highway 95 Slate Creek to Riggins, and White Bird Grade. * WHEN...Until 5 PM PST this afternoon. * IMPACTS...Travel could be very difficult. 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. && $$ MTZ007-150000- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211215T0000Z/ Butte/Blackfoot Region- 1138 AM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 1 to 3 inches. Higher amounts around Anaconda possible. * WHERE...Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...From 5 PM this afternoon to 5 PM MST Tuesday. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
077 WWUS45 KMSO 142231 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 331 PM MST Tue Dec 14 2021 MTZ007-150600- /O.UPG.KMSO.WW.Y.0066.000000T0000Z-211215T0000Z/ /O.EXB.KMSO.WS.W.0011.000000T0000Z-211215T0600Z/ Butte/Blackfoot Region- 331 PM MST Tue Dec 14 2021 ...WINTER STORM WARNING IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...Heavy snow. Additional snow accumulations of 1 to 4 inches. Roadways will freeze up this evening as temperatures quickly fall after sunset. * WHERE...Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...Until 11 PM MST this evening. * IMPACTS...Travel could be very difficult. 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. && $$ IDZ007-150100- /O.CON.KMSO.WS.W.0011.000000T0000Z-211215T0100Z/ Orofino/Grangeville Region- 231 PM PST Tue Dec 14 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PST THIS AFTERNOON... * WHAT...Heavy snow. Additional snow accumulations of 1 to 2 inches on the Camas Prairie...especially around Grangeville. Total snow accumulations of 1 to 3 inches in the lower valleys. * WHERE...Camas Prairie, Grangeville and vicinity, and Greer Grade. * WHEN...Until 5 PM PST this afternoon. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ005-006-MTZ006-150600- /O.EXT.KMSO.WW.Y.0066.000000T0000Z-211215T0600Z/ Northern Clearwater Mountains-Southern Clearwater Mountains- Bitterroot/Sapphire Mountains- 331 PM MST Tue Dec 14 2021 /231 PM PST Tue Dec 14 2021/ ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 11 PM MST /10 PM PST/ THIS EVENING... * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches. * WHERE...Elk River, Highway 11 Pierce to Headquarters, Pierce, Dixie, Elk City, Highway 12 Lowell to Lolo Pass, Highway 93 Sula to Lost Trail Pass, and Lolo Pass. * WHEN...Until 11 PM MST /10 PM PST/ this evening. * 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. && $$ MTZ043-150600- /O.EXT.KMSO.WW.Y.0067.000000T0000Z-211215T0600Z/ Potomac/Seeley Lake Region- 331 PM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...Snow. Additional snow accumulations of 1 to 3 inches. * WHERE...Highway 200 Bonner to Greenough, Highway 83 Seeley Lake to Condon, and I-90 East Missoula to Bearmouth. * WHEN...Until 11 PM MST this evening. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ008-150100- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211215T0100Z/ Lower Hells Canyon/Salmon River Region- 231 PM PST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM PST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches in the higher elevations. 1 to 3 inches in the lower valleys. * WHERE...Highway 95 Slate Creek to Riggins, and White Bird Grade. * WHEN...Until 5 PM PST this afternoon. * IMPACTS...Travel could be very difficult. 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. && $$
402 WWUS45 KMSO 142336 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 436 PM MST Tue Dec 14 2021 MTZ007-150600- /O.CON.KMSO.WS.W.0011.000000T0000Z-211215T0600Z/ Butte/Blackfoot Region- 436 PM MST Tue Dec 14 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...Heavy snow. Additional snow accumulations of 1 to 4 inches. Roadways will freeze up this evening as temperatures quickly fall after sunset. * WHERE...Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...Until 11 PM MST this evening. * IMPACTS...Travel could be very difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ007-150100- /O.CON.KMSO.WS.W.0011.000000T0000Z-211215T0100Z/ Orofino/Grangeville Region- 336 PM PST Tue Dec 14 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PST THIS AFTERNOON... * WHAT...Heavy snow. Additional snow accumulations of 1 to 2 inches on the Camas Prairie...especially around Grangeville. Total snow accumulations of 1 to 3 inches in the lower valleys. * WHERE...Camas Prairie, Grangeville and vicinity, and Greer Grade. * WHEN...Until 5 PM PST this afternoon. * 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. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ003-150600- /O.NEW.KMSO.WW.Y.0068.211214T2336Z-211215T0600Z/ Flathead/Mission Valleys- 436 PM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...Snow. Additional snow accumulations of 1 to 3 inches, with locally higher accumulations on the eastern shore of Flathead Lake. * WHERE...Flathead Lake, Flathead Valley, Mission Valley, and Polson. * WHEN...Until 11 PM MST this evening. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ005-006-MTZ006-150600- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211215T0600Z/ Northern Clearwater Mountains-Southern Clearwater Mountains- Bitterroot/Sapphire Mountains- 436 PM MST Tue Dec 14 2021 /336 PM PST Tue Dec 14 2021/ ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST /10 PM PST/ THIS EVENING... * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches. * WHERE...Elk River, Highway 11 Pierce to Headquarters, Pierce, Dixie, Elk City, Highway 12 Lowell to Lolo Pass, Highway 93 Sula to Lost Trail Pass, and Lolo Pass. * WHEN...Until 11 PM MST /10 PM PST/ this evening. * 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. && $$ IDZ008-150100- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211215T0100Z/ Lower Hells Canyon/Salmon River Region- 336 PM PST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM PST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches in the higher elevations. 1 to 3 inches in the lower valleys. * WHERE...Highway 95 Slate Creek to Riggins, and White Bird Grade. * WHEN...Until 5 PM PST this afternoon. * IMPACTS...Travel could be very difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ043-150600- /O.CON.KMSO.WW.Y.0067.000000T0000Z-211215T0600Z/ Potomac/Seeley Lake Region- 436 PM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * 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 11 PM MST this evening. * 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. && $$
371 WWUS45 KMSO 142347 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 447 PM MST Tue Dec 14 2021 MTZ007-150600- /O.CON.KMSO.WS.W.0011.000000T0000Z-211215T0600Z/ Butte/Blackfoot Region- 447 PM MST Tue Dec 14 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...Heavy snow. Additional snow accumulations of 1 to 4 inches. Roadways will freeze up this evening as temperatures quickly fall after sunset. * WHERE...Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...Until 11 PM MST this evening. * IMPACTS...Travel could be very difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ007-150100- /O.CON.KMSO.WS.W.0011.000000T0000Z-211215T0100Z/ Orofino/Grangeville Region- 347 PM PST Tue Dec 14 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PST THIS AFTERNOON... * WHAT...Heavy snow. Additional snow accumulations of up to 1 inch on the Camas Prairie...especially around Grangeville. Total snow accumulations of 1 to 3 inches in the lower valleys. * WHERE...Camas Prairie, Grangeville and vicinity, and Greer Grade. * WHEN...Until 5 PM PST this afternoon. * 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. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ005-150600- /O.NEW.KMSO.WW.Y.0069.211214T2347Z-211215T0600Z/ Missoula/Bitterroot Valleys- 447 PM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...Snow. Total snow accumulations of up to 2 inches. Watch for freezing roadways as temperatures fall below freezing this evening. * WHERE...Missoula/Bitterroot Valleys. * WHEN...Until 11 PM MST this evening. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ003-150600- /O.CON.KMSO.WW.Y.0068.000000T0000Z-211215T0600Z/ Flathead/Mission Valleys- 447 PM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...Snow. Additional snow accumulations of 1 to 3 inches, with locally higher accumulations on the eastern shore of Flathead Lake. * WHERE...Flathead Lake, Flathead Valley, Mission Valley, and Polson. * WHEN...Until 11 PM MST this evening. * 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. && $$ IDZ005-006-MTZ006-150600- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211215T0600Z/ Northern Clearwater Mountains-Southern Clearwater Mountains- Bitterroot/Sapphire Mountains- 447 PM MST Tue Dec 14 2021 /347 PM PST Tue Dec 14 2021/ ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST /10 PM PST/ THIS EVENING... * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches. * WHERE...Elk River, Highway 11 Pierce to Headquarters, Pierce, Dixie, Elk City, Highway 12 Lowell to Lolo Pass, Highway 93 Sula to Lost Trail Pass, and Lolo Pass. * WHEN...Until 11 PM MST /10 PM PST/ this evening. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ008-150100- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211215T0100Z/ Lower Hells Canyon/Salmon River Region- 347 PM PST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM PST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches in the higher elevations. 1 to 3 inches in the lower valleys. * WHERE...Highway 95 Slate Creek to Riggins, and White Bird Grade. * WHEN...Until 5 PM PST this afternoon. * IMPACTS...Travel could be very difficult. 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. && $$ MTZ043-150600- /O.CON.KMSO.WW.Y.0067.000000T0000Z-211215T0600Z/ Potomac/Seeley Lake Region- 447 PM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...Snow. Additional snow accumulations of 1 to 3 inches. * WHERE...Highway 200 Bonner to Greenough, Highway 83 Seeley Lake to Condon, and I-90 East Missoula to Bearmouth. * WHEN...Until 11 PM MST this evening. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
788 WWUS45 KMSO 150041 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 541 PM MST Tue Dec 14 2021 IDZ007-150145- /O.EXP.KMSO.WS.W.0011.000000T0000Z-211215T0100Z/ Orofino/Grangeville Region- 441 PM PST Tue Dec 14 2021 ...WINTER STORM WARNING WILL EXPIRE AT 5 PM PST THIS AFTERNOON... $$ IDZ008-150145- /O.EXP.KMSO.WW.Y.0066.000000T0000Z-211215T0100Z/ Lower Hells Canyon/Salmon River Region- 441 PM PST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 PM PST THIS AFTERNOON... $$ MTZ007-150600- /O.CON.KMSO.WS.W.0011.000000T0000Z-211215T0600Z/ Butte/Blackfoot Region- 541 PM MST Tue Dec 14 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...Heavy snow. Additional snow accumulations of 1 to 4 inches. Roadways will freeze up this evening as temperatures quickly fall after sunset. * WHERE...Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...Until 11 PM MST this evening. * IMPACTS...Travel could be very difficult. 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. && $$ MTZ003-150600- /O.CON.KMSO.WW.Y.0068.000000T0000Z-211215T0600Z/ Flathead/Mission Valleys- 541 PM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...Snow. Additional snow accumulations of 1 to 3 inches, with locally higher accumulations on the eastern shore of Flathead Lake. * WHERE...Flathead Lake, Flathead Valley, Mission Valley, and Polson. * WHEN...Until 11 PM MST this evening. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ005-150600- /O.CON.KMSO.WW.Y.0069.000000T0000Z-211215T0600Z/ Missoula/Bitterroot Valleys- 541 PM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...Snow. Total snow accumulations of up to 2 inches. Watch for freezing roadways as temperatures fall below freezing this evening. * WHERE...Missoula/Bitterroot Valleys. * WHEN...Until 11 PM MST this evening. * 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. && $$ IDZ005-006-MTZ006-150600- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211215T0600Z/ Northern Clearwater Mountains-Southern Clearwater Mountains- Bitterroot/Sapphire Mountains- 541 PM MST Tue Dec 14 2021 /441 PM PST Tue Dec 14 2021/ ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST /10 PM PST/ THIS EVENING... * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches. * WHERE...Elk River, Highway 11 Pierce to Headquarters, Pierce, Dixie, Elk City, Highway 12 Lowell to Lolo Pass, Highway 93 Sula to Lost Trail Pass, and Lolo Pass. * WHEN...Until 11 PM MST /10 PM PST/ this evening. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ043-150600- /O.CON.KMSO.WW.Y.0067.000000T0000Z-211215T0600Z/ Potomac/Seeley Lake Region- 541 PM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * 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 11 PM MST this evening. * 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. && $$
118 WWUS45 KMSO 150333 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 833 PM MST Tue Dec 14 2021 MTZ005-150445- /O.CAN.KMSO.WW.Y.0069.000000T0000Z-211215T0600Z/ Missoula/Bitterroot Valleys- 833 PM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Snow shower activity has largely ended this evening. Watch for areas of black ice on untreated roadways if you plan to travel. $$ MTZ003-150445- /O.CAN.KMSO.WW.Y.0068.000000T0000Z-211215T0600Z/ Flathead/Mission Valleys- 833 PM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Snow shower activity has largely ended this evening. Watch for areas of black ice on untreated roadways if you plan to travel. $$ MTZ043-150445- /O.CAN.KMSO.WW.Y.0067.000000T0000Z-211215T0600Z/ Potomac/Seeley Lake Region- 833 PM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Snow shower activity has largely ended this evening. Watch for areas of black ice on untreated roadways if you plan to travel. $$ IDZ005-006-150445- /O.CAN.KMSO.WW.Y.0066.000000T0000Z-211215T0600Z/ Northern Clearwater Mountains-Southern Clearwater Mountains- 733 PM PST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Snow shower activity has largely ended this evening. Watch for areas of black ice on untreated roadways if you plan to travel. $$ MTZ007-150600- /O.CON.KMSO.WS.W.0011.000000T0000Z-211215T0600Z/ Butte/Blackfoot Region- 833 PM MST Tue Dec 14 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...Heavy snow. Additional snow accumulations of up to 2 inches. Untreated roadways will continue to freeze as temperatures drop into the mid to low 20s. * WHERE...Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...Until 11 PM MST this evening. * IMPACTS...Travel could be very difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ006-150600- /O.CON.KMSO.WW.Y.0066.000000T0000Z-211215T0600Z/ Bitterroot/Sapphire Mountains- 833 PM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...Snow. Additional snow accumulations of 1 to 2 inches. * WHERE...Bitterroot/Sapphire Mountains. * WHEN...Until 11 PM MST this evening. * 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. && $$
502 WWUS45 KMSO 150444 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 944 PM MST Tue Dec 14 2021 MTZ007-150545- /O.CAN.KMSO.WS.W.0011.000000T0000Z-211215T0600Z/ Butte/Blackfoot Region- 944 PM MST Tue Dec 14 2021 ...WINTER STORM WARNING IS CANCELLED... Light snow showers will continue to impact mountain passes areas during the next few hours. Otherwise, the period of high impact winter weather has ended. $$ MTZ006-150545- /O.CAN.KMSO.WW.Y.0066.000000T0000Z-211215T0600Z/ Bitterroot/Sapphire Mountains- 944 PM MST Tue Dec 14 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Snow shower activity has largely ended. A few light snow showers will continue to impact Lost Trail Pass the next few hours. $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 14, 10:38 AM PST | Winter Weather Advisory | MSO | Granite, Lake, Missoula, Powell | 9 hr |
| Dec 14, 1:55 PM PST | Special Weather Statement | MSO | Silver Bow | 65 min |
| Dec 14, 3:05 PM PST | Special Weather Statement | MSO | Lake | 55 min |
| Dec 14, 3:36 PM PST | Winter Weather Advisory | MSO | Flathead, Lake, Sanders | 4 hr |
| Dec 14, 3:47 PM PST | Winter Weather Advisory | MSO | Missoula, Ravalli | 4 hr |
Nearby
Winter Storm Warnings in Montana, 2021Winter Storm Warnings in Idaho, 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.