Alert archive / Montana / High Wind Watches in 2021
High Wind Watch 2, NWS Missoula, MT
NWS Missoula, MT issued this high wind watch at Jan 11, 2021, 2:39 PM MST for 11 counties in Montana; Clearwater County, Idaho County, Idaho. It took effect at Jan 12, 2021, 11:00 PM MST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Jan 11, 2021, 2:39 PM MST (21:39 UTC)
- In effect from
- Jan 12, 2021, 11:00 PM MST
- Expired
- Jan 12, 2021, 12:03 PM MST
- In force
- Issued by
- NWS Missoula, MT
Counties Clearwater County, ID, Idaho County, ID, Deer Lodge County, MT, Flathead County, MT, Granite County, MT, Lake County, MT, Lincoln County, MT, Mineral County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 22 km from the middle of the area, began a volume at 21:38 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, 9.7 hours before the alert went out and 185 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
- 986 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 168 m²/s²
- 0-3 km storm-relative helicity
- 196 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
946 WWUS75 KMSO 112139 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 239 PM MST Mon Jan 11 2021 IDZ007-122145- /O.NEW.KMSO.HW.A.0002.210113T0600Z-210113T1800Z/ Orofino/Grangeville Region- 139 PM PST Mon Jan 11 2021 ...HIGH WIND WATCH IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY MORNING... * WHAT...South winds 35 to 45 mph with gusts to 65 mph possible. * WHERE...Camas Prairie, Grangeville and vicinity, and Greer Grade. * WHEN...From Tuesday evening through Wednesday morning. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ MTZ001>007-043-122145- /O.NEW.KMSO.HW.A.0002.210113T1000Z-210114T0300Z/ Kootenai/Cabinet Region-West Glacier Region- Flathead/Mission Valleys-Lower Clark Fork Region- Missoula/Bitterroot Valleys-Bitterroot/Sapphire Mountains- Butte/Blackfoot Region-Potomac/Seeley Lake Region- 239 PM MST Mon Jan 11 2021 ...HIGH WIND WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH WEDNESDAY EVENING... * WHAT...Southwest winds 30 to 40 mph with gusts to 55 mph possible. * WHERE...Kootenai/Cabinet Region, West Glacier Region, Flathead/Mission Valleys, Lower Clark Fork Region, Missoula/Bitterroot Valleys, Bitterroot/Sapphire Mountains, Butte/Blackfoot Region and Potomac/Seeley Lake Region. * WHEN...From late Tuesday night through Wednesday evening. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$
1 follow-up statement
754 WWUS75 KMSO 121903 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 1203 PM MST Tue Jan 12 2021 IDZ007-131800- /O.UPG.KMSO.HW.A.0002.210113T0600Z-210113T1800Z/ /O.NEW.KMSO.HW.W.0001.210113T0600Z-210113T1500Z/ Orofino/Grangeville Region- 1103 AM PST Tue Jan 12 2021 ...HIGH WIND WARNING IN EFFECT FROM 10 PM THIS EVENING TO 7 AM PST WEDNESDAY... * WHAT...South winds 25 to 35 mph with gusts up to 55 mph expected. Occasional gusts up to 65 mph are possible. * WHERE...Grangeville and vicinity. * WHEN...From 10 PM this evening to 7 AM PST Wednesday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ MTZ005-131915- /O.UPG.KMSO.HW.A.0002.210113T1000Z-210114T0300Z/ /O.NEW.KMSO.HW.W.0001.210113T1200Z-210114T0400Z/ Missoula/Bitterroot Valleys- 1203 PM MST Tue Jan 12 2021 ...HIGH WIND WARNING IN EFFECT FROM 5 AM TO 9 PM MST WEDNESDAY... * WHAT...Southwest winds 25 to 35 mph with gusts up to 50 mph expected. Occasional isolated gusts in excess of 60 mph are possible between 7 AM and 12 PM along and behind the cold front. * WHERE...Missoula/Bitterroot Valleys. * WHEN...From 5 AM to 9 PM MST Wednesday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ MTZ007-043-131915- /O.UPG.KMSO.HW.A.0002.210113T1000Z-210114T0300Z/ /O.NEW.KMSO.HW.W.0001.210113T1200Z-210114T0400Z/ Butte/Blackfoot Region-Potomac/Seeley Lake Region- 1203 PM MST Tue Jan 12 2021 ...HIGH WIND WARNING IN EFFECT FROM 5 AM TO 9 PM MST WEDNESDAY... * WHAT...Southwest winds 25 to 35 mph with gusts near 60 mph expected. The highest wind gusts are expected to be along Interstate 90 from Deer Lodge to Anaconda. * WHERE...Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, MacDonald Pass, Highway 200 Bonner to Greenough, Highway 83 Seeley Lake to Condon, and I-90 East Missoula to Bearmouth. * WHEN...From 5 AM to 9 PM MST Wednesday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ MTZ002-131915- /O.UPG.KMSO.HW.A.0002.210113T1000Z-210114T0300Z/ /O.NEW.KMSO.HW.W.0001.210113T1200Z-210114T0400Z/ West Glacier Region- 1203 PM MST Tue Jan 12 2021 ...HIGH WIND WARNING IN EFFECT FROM 5 AM TO 9 PM MST WEDNESDAY... * WHAT...Southwest winds 35 to 45 mph with gusts up to 60 mph expected. Snow and blowing snow along with the strong winds are expected at Marias Pass. Travel will be difficult due to low visibility from blowing snow. * WHERE...Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, and Polebridge. * WHEN...From 5 AM to 9 PM MST Wednesday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ MTZ004-131915- /O.UPG.KMSO.HW.A.0002.210113T1000Z-210114T0300Z/ /O.NEW.KMSO.WI.Y.0002.210113T1100Z-210114T0400Z/ Lower Clark Fork Region- 1203 PM MST Tue Jan 12 2021 ...WIND ADVISORY IN EFFECT FROM 4 AM TO 9 PM MST WEDNESDAY... * WHAT...Southwest winds 30 to 40 mph with gusts up to 50 mph expected. * WHERE...Evaro Hill, Highway 200 Thompson Falls to Plains, Highway 200 Trout Creek to Heron, and I-90 Lookout Pass to Haugan. * WHEN...From 4 AM to 9 PM MST Wednesday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ MTZ001-003-131915- /O.UPG.KMSO.HW.A.0002.210113T1000Z-210114T0300Z/ /O.NEW.KMSO.WI.Y.0002.210113T1100Z-210114T0400Z/ Kootenai/Cabinet Region-Flathead/Mission Valleys- 1203 PM MST Tue Jan 12 2021 ...WIND ADVISORY IN EFFECT FROM 4 AM TO 9 PM MST WEDNESDAY... * WHAT...Southwest winds 25 to 35 mph with gusts up to 50 mph expected. The strongest winds are expected to be along Highway 93 from Whitefish to Eureka. * WHERE...Highway 2 Kalispell to Libby, Highway 37 Eureka to Libby, Highway 56 Bull Lake Road, Highway 93 Eureka to Whitefish, Flathead Lake, Flathead Valley, Mission Valley, and Polson. * WHEN...From 4 AM to 9 PM MST Wednesday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ MTZ006-131915- /O.UPG.KMSO.HW.A.0002.210113T1000Z-210114T0300Z/ /O.NEW.KMSO.WI.Y.0002.210113T1200Z-210114T0400Z/ Bitterroot/Sapphire Mountains- 1203 PM MST Tue Jan 12 2021 ...WIND ADVISORY IN EFFECT FROM 5 AM TO 9 PM MST WEDNESDAY... * WHAT...Southwest winds 30 to 40 mph with gusts up to 50 mph expected. * WHERE...Bitterroot/Sapphire Mountains. * WHEN...From 5 AM to 9 PM MST Wednesday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ IDZ009-010-131915- /O.NEW.KMSO.WI.Y.0002.210113T1200Z-210114T0400Z/ Western Lemhi County-Eastern Lemhi County- 1203 PM MST Tue Jan 12 2021 ...WIND ADVISORY IN EFFECT FROM 5 AM TO 9 PM MST WEDNESDAY... * WHAT...Southwest winds 20 to 30 mph with gusts up to 45 mph expected. * WHERE...Shoup, Bannock Pass, Highway 28 Tendoy to Lone Pine, Highway 93 Lost Trail Pass to Gibbonsville, Lemhi Pass, and Salmon. * WHEN...From 5 AM to 9 PM MST Wednesday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 11, 2:39 PM MST | Winter Weather Advisory | MSO | Flathead, Granite, Lake, Lincoln, Mineral, Missoula and 2 more | 23 hr |
Nearby
High Wind Watches in Montana, 2021High Wind Watches in Idaho, 2021Every high wind watch 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.