Alert archive / Montana / Wind Chill Advisories in 2021
Wind Chill Advisory 1, NWS Missoula, MT
NWS Missoula, MT issued this wind chill advisory at Feb 8, 2021, 7:47 AM MST for 8 counties in Montana. It was in force for 27 hr.
The area
The counties it named.
The facts
- Issued
- Feb 8, 2021, 7:47 AM MST (14:47 UTC)
- Expired
- Feb 9, 2021, 11:00 AM MST
- In force
- 27 hr
- Issued by
- NWS Missoula, MT
Counties Deer Lodge County, MT, Flathead County, MT, Granite County, MT, Lake County, MT, Missoula County, MT, Powell County, MT, Sanders County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 25 km from the middle of the area, began a volume at 14:50 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.
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 2.8 hours before the alert went out and 221 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
- 1208 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
364 WWUS45 KMSO 081447 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 747 AM MST Mon Feb 8 2021 MTZ002-091500- /O.NEW.KMSO.WC.Y.0001.210208T1447Z-210209T1800Z/ West Glacier Region- 747 AM MST Mon Feb 8 2021 ...WIND CHILL ADVISORY IN EFFECT UNTIL 11 AM MST TUESDAY... * WHAT...Very cold wind chills. Wind chills as low as 25 below zero. * WHERE...Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, and Polebridge. * WHEN...Until 11 AM MST Tuesday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ IDZ007-081800- /O.CON.KMSO.WW.Y.0012.000000T0000Z-210208T1800Z/ Orofino/Grangeville Region- 647 AM PST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING... * WHAT...Snow. Additional snow accumulations of up to one inch. * WHERE...Camas Prairie, Grangeville and vicinity, and Greer Grade. * WHEN...Until 10 AM PST this morning. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ005-081800- /O.CON.KMSO.WW.Y.0014.000000T0000Z-210208T1800Z/ Missoula/Bitterroot Valleys- 747 AM MST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * WHAT...Snow. Additional snow accumulations of up to one inch. * WHERE...Missoula/Bitterroot Valleys. * WHEN...Until 11 AM MST this morning. * 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. && $$ MTZ006-081800- /O.CON.KMSO.WW.Y.0012.000000T0000Z-210208T1800Z/ Bitterroot/Sapphire Mountains- 747 AM MST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * WHAT...Snow. Additional snow accumulations of up to one inch. * WHERE...Bitterroot/Sapphire Mountains. * WHEN...Until 11 AM MST this morning. * IMPACTS...Travel could be affected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ007-081800- /O.CON.KMSO.WW.Y.0012.000000T0000Z-210208T1800Z/ Butte/Blackfoot Region- 747 AM MST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * WHAT...Snow. Additional snow accumulations of up to one inch. * WHERE...Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...Until 11 AM MST this morning. * IMPACTS...Travel could be affected. The cold wind chills as low as 20 below zero could cause frostbite on exposed skin in as little as 30 minutes. 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. && $$ MTZ043-081800- /O.CON.KMSO.WW.Y.0012.000000T0000Z-210208T1800Z/ Potomac/Seeley Lake Region- 747 AM MST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * WHAT...Snow. Additional snow accumulations of up to one inch. * WHERE...Highway 200 Bonner to Greenough, Highway 83 Seeley Lake to Condon, and I-90 East Missoula to Bearmouth. * WHEN...Until 11 AM MST this morning. * IMPACTS...Travel could be affected. The cold wind chills as low as 20 below zero could cause frostbite on exposed skin in as little as 30 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ005-006-081800- /O.CON.KMSO.WW.Y.0012.000000T0000Z-210208T1800Z/ Northern Clearwater Mountains-Southern Clearwater Mountains- 647 AM PST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING... * WHAT...Snow. Additional snow accumulations of up to one inch. * WHERE...Elk River, Highway 11 Pierce to Headquarters, Pierce, Dixie, Elk City, and Highway 12 Lowell to Lolo Pass. * WHEN...Until 10 AM PST this morning. * 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. && $$
5 follow-up statements
210 WWUS45 KMSO 081746 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 1046 AM MST Mon Feb 8 2021 IDZ007-081900- /O.EXP.KMSO.WW.Y.0012.000000T0000Z-210208T1800Z/ Orofino/Grangeville Region- 946 AM PST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 10 AM PST THIS MORNING... Light snow will continue throughout the day with minimal impacts expected. $$ MTZ005-081900- /O.EXP.KMSO.WW.Y.0014.000000T0000Z-210208T1800Z/ Missoula/Bitterroot Valleys- 1046 AM MST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS MORNING... Light snow will continue throughout the day with minimal impacts expected. $$ MTZ006-081900- /O.EXP.KMSO.WW.Y.0012.000000T0000Z-210208T1800Z/ Bitterroot/Sapphire Mountains- 1046 AM MST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS MORNING... Light snow will continue throughout the day with minimal impacts expected. $$ MTZ007-081900- /O.EXP.KMSO.WW.Y.0012.000000T0000Z-210208T1800Z/ Butte/Blackfoot Region- 1046 AM MST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS MORNING... Light snow will continue throughout the day with minimal impacts expected. $$ MTZ043-081900- /O.EXP.KMSO.WW.Y.0012.000000T0000Z-210208T1800Z/ Potomac/Seeley Lake Region- 1046 AM MST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS MORNING... Light snow will continue throughout the day with minimal impacts expected. $$ IDZ005-006-081900- /O.EXP.KMSO.WW.Y.0012.000000T0000Z-210208T1800Z/ Northern Clearwater Mountains-Southern Clearwater Mountains- 946 AM PST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 10 AM PST THIS MORNING... Light snow will continue throughout the day with minimal impacts expected. $$ MTZ003-091800- /O.EXB.KMSO.WC.Y.0001.210209T0300Z-210209T1800Z/ Flathead/Mission Valleys- 1046 AM MST Mon Feb 8 2021 ...WIND CHILL ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 11 AM MST TUESDAY... * WHAT...Very cold wind chills expected. Wind chills as low as 25 below zero. * WHERE...Flathead Lake, Flathead Valley, Mission Valley, and Polson. * WHEN...From 8 PM this evening to 11 AM MST Tuesday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ MTZ002-091800- /O.CON.KMSO.WC.Y.0001.000000T0000Z-210209T1800Z/ West Glacier Region- 1046 AM MST Mon Feb 8 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST TUESDAY... * WHAT...Very cold wind chills. Wind chills as low as 25 below zero. * WHERE...Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, and Polebridge. * WHEN...Until 11 AM MST Tuesday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$
492 WWUS45 KMSO 082340 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 440 PM MST Mon Feb 8 2021 MTZ005-091600- /O.NEW.KMSO.WW.Y.0015.210208T2340Z-210209T1600Z/ Missoula/Bitterroot Valleys- 440 PM MST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 9 AM MST TUESDAY... * WHAT...Snow. Additional snow accumulations of up to 3 inches. Multiple snowbands continue to develop and are expected to continue to impact the Missoula and Bitterroot Valleys through the evening commute. Varied snow accumulations are expected under the bands with a trace to 3 inches. Brief periods of 1 inch per hour snow rates under the heavier bands are possible. * WHERE...Missoula/Bitterroot Valleys. * WHEN...Until 9 AM MST Tuesday. * IMPACTS...Travel could be affected. Changing road conditions from wet to snow covered in short distances are expected with the narrow snowbands. Visibility will also change from good to one-half mile in a short distance. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ002-091800- /O.CON.KMSO.WC.Y.0001.000000T0000Z-210209T1800Z/ West Glacier Region- 440 PM MST Mon Feb 8 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST TUESDAY... * WHAT...Very cold wind chills. Wind chills as low as 25 below zero. * WHERE...Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, and Polebridge. * WHEN...Until 11 AM MST Tuesday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ MTZ003-091800- /O.CON.KMSO.WC.Y.0001.210209T0300Z-210209T1800Z/ Flathead/Mission Valleys- 440 PM MST Mon Feb 8 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 11 AM MST TUESDAY... * WHAT...Very cold wind chills expected. Wind chills as low as 25 below zero. * WHERE...Flathead Lake, Flathead Valley, Mission Valley, and Polson. * WHEN...From 8 PM this evening to 11 AM MST Tuesday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$
227 WWUS45 KMSO 090352 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 852 PM MST Mon Feb 8 2021 MTZ043-091800- /O.EXA.KMSO.WC.Y.0001.000000T0000Z-210209T1800Z/ Potomac/Seeley Lake Region- 852 PM MST Mon Feb 8 2021 ...WIND CHILL ADVISORY IN EFFECT UNTIL 11 AM MST TUESDAY... * WHAT...Very cold wind chills. Wind chills as low as 25 below zero. * WHERE...Greenough, Clearwater Junction, Seeley Lake and Potomac. * WHEN...Until 11 AM MST Tuesday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ MTZ007-091800- /O.EXA.KMSO.WC.Y.0001.000000T0000Z-210209T1800Z/ Butte/Blackfoot Region- 852 PM MST Mon Feb 8 2021 ...WIND CHILL ADVISORY IN EFFECT UNTIL 11 AM MST TUESDAY... * WHAT...Very cold wind chills. Wind chills as low as 25 below zero. * WHERE...Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...Until 11 AM MST Tuesday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ MTZ005-091600- /O.CON.KMSO.WW.Y.0015.000000T0000Z-210209T1600Z/ Missoula/Bitterroot Valleys- 852 PM MST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MST TUESDAY... * WHAT...Snow. Total additional snow accumulations overnight of up to 3 inches. Snowbands will continue overnight and be capable of producing 1 inch per hour snow rates, most notably for areas in the South Hills south of Missoula, and highway 93 from Missoula to Lolo. The morning commute is expected to be impacted. * WHERE...Missoula and Bitterroot Valleys. * WHEN...Until 9 AM MST Tuesday. * IMPACTS...Travel could be affected. Changing road conditions from wet to snow covered in short distances are expected with the narrow snowbands. Visibility will also change from good to one- half mile in a short distance. 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. && $$ MTZ002-091800- /O.CON.KMSO.WC.Y.0001.000000T0000Z-210209T1800Z/ West Glacier Region- 852 PM MST Mon Feb 8 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST TUESDAY... * WHAT...Very cold wind chills. Wind chills as low as 25 below zero. * WHERE...Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, and Polebridge. * WHEN...Until 11 AM MST Tuesday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ MTZ003-091800- /O.CON.KMSO.WC.Y.0001.000000T0000Z-210209T1800Z/ Flathead/Mission Valleys- 852 PM MST Mon Feb 8 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST TUESDAY... * WHAT...Very cold wind chills expected. Wind chills as low as 25 below zero. * WHERE...Flathead Lake, Flathead Valley, Mission Valley, and Polson. * WHEN...From 8 PM this evening to 11 AM MST Tuesday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$
033 WWUS45 KMSO 091532 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 832 AM MST Tue Feb 9 2021 MTZ005-091645- /O.EXP.KMSO.WW.Y.0015.000000T0000Z-210209T1600Z/ Missoula/Bitterroot Valleys- 832 AM MST Tue Feb 9 2021 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM MST THIS MORNING... Light snow will continue periodically throughout the day today. $$ MTZ002-091800- /O.CON.KMSO.WC.Y.0001.000000T0000Z-210209T1800Z/ West Glacier Region- 832 AM MST Tue Feb 9 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * WHAT...Very cold wind chills. Wind chills as low as 25 below zero. * WHERE...Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, and Polebridge. * WHEN...Until 11 AM MST Tuesday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ MTZ003-091800- /O.CON.KMSO.WC.Y.0001.000000T0000Z-210209T1800Z/ Flathead/Mission Valleys- 832 AM MST Tue Feb 9 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * WHAT...Very cold wind chills expected. Wind chills as low as 25 below zero. * WHERE...Flathead Lake, Flathead Valley, Mission Valley, and Polson. * WHEN...From 8 PM this evening to 11 AM MST Tuesday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ MTZ043-091800- /O.CON.KMSO.WC.Y.0001.000000T0000Z-210209T1800Z/ Potomac/Seeley Lake Region- 832 AM MST Tue Feb 9 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * WHAT...Very cold wind chills. Wind chills as low as 25 below zero. * WHERE...Greenough, Clearwater Junction, Seeley Lake and Potomac. * WHEN...Until 11 AM MST Tuesday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ MTZ007-091800- /O.CON.KMSO.WC.Y.0001.000000T0000Z-210209T1800Z/ Butte/Blackfoot Region- 832 AM MST Tue Feb 9 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... * WHAT...Very cold wind chills. Wind chills as low as 25 below zero. * WHERE...Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...Until 11 AM MST Tuesday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$
680 WWUS45 KMSO 091735 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 1035 AM MST Tue Feb 9 2021 MTZ002-091845- /O.EXP.KMSO.WC.Y.0001.000000T0000Z-210209T1800Z/ West Glacier Region- 1035 AM MST Tue Feb 9 2021 ...WIND CHILL ADVISORY WILL EXPIRE AT 11 AM MST THIS MORNING... Even though winds will continue and combine with very cold temperatures, the threshold for the coldest wind chill values has diminished for the time being. Continue to protect against the threat for frostbite as even light winds and cold temps can cause injury. $$ MTZ003-091845- /O.EXP.KMSO.WC.Y.0001.000000T0000Z-210209T1800Z/ Flathead/Mission Valleys- 1035 AM MST Tue Feb 9 2021 ...WIND CHILL ADVISORY WILL EXPIRE AT 11 AM MST THIS MORNING... Even though winds will continue and combine with very cold temperatures, the threshold for the coldest wind chill values has diminished for the time being. Continue to protect against the threat for frostbite as even light winds and cold temps can cause injury. $$ MTZ043-091845- /O.EXP.KMSO.WC.Y.0001.000000T0000Z-210209T1800Z/ Potomac/Seeley Lake Region- 1035 AM MST Tue Feb 9 2021 ...WIND CHILL ADVISORY WILL EXPIRE AT 11 AM MST THIS MORNING... Even though winds will continue and combine with very cold temperatures, the threshold for the coldest wind chill values has diminished for the time being. Continue to protect against the threat for frostbite as even light winds and cold temps can cause injury. $$ MTZ007-091845- /O.EXP.KMSO.WC.Y.0001.000000T0000Z-210209T1800Z/ Butte/Blackfoot Region- 1035 AM MST Tue Feb 9 2021 ...WIND CHILL ADVISORY WILL EXPIRE AT 11 AM MST THIS MORNING... Even though winds will continue and combine with very cold temperatures, the threshold for the coldest wind chill values has diminished for the time being. Continue to protect against the threat for frostbite as even light winds and cold temps can cause injury. $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 8, 4:40 PM MST | Winter Weather Advisory | MSO | Missoula, Ravalli | 16 hr |
Nearby
Wind Chill Advisories in Montana, 2021Every wind chill advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.