Alert archive / Montana / High Wind Warnings in 2021
High Wind Warning 2, NWS Missoula, MT
NWS Missoula, MT issued this high wind warning at Feb 21, 2021, 10:42 AM MST for Flathead County, Lincoln County, Sanders County, Montana. It took effect at Feb 21, 2021, 3:00 PM MST. It was in force for 20 hr. 2 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
- Feb 21, 2021, 10:42 AM MST (17:42 UTC)
- In effect from
- Feb 21, 2021, 3:00 PM MST
- Expired
- Feb 22, 2021, 11:00 AM MST
- In force
- 20 hr
- Issued by
- NWS Missoula, MT
Counties Flathead County, MT, Lincoln County, MT, Sanders County, MT
The radar
The Missoula radar (KMSX), 142 km from the middle of the area, began a volume at 17:48 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 |
|---|---|---|---|
| Feb 21, 6:00 PM MST | NON-TSTM WND GST 50 | 5 Ene Blacktail - Railr, MT | MESONET STATION MRPMT MARIAS PASS. |
| Feb 22, 8:15 AM MST | NON-TSTM WND GST 54 | 2 E Camas, MT | MESONET STATION HOTM8 1 SW HOT SPRINGS. |
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, 5.7 hours before the alert went out and 126 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
- 717 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 196 m²/s²
- 0-3 km storm-relative helicity
- 272 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
855 WWUS75 KMSO 211742 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 1042 AM MST Sun Feb 21 2021 MTZ002-211845- /O.CAN.KMSO.HW.A.0003.210222T0000Z-210222T1800Z/ West Glacier Region- 1042 AM MST Sun Feb 21 2021 ...HIGH WIND WATCH IS CANCELLED... $$ MTZ001-221745- /O.UPG.KMSO.HW.A.0003.210222T0000Z-210222T1800Z/ /O.NEW.KMSO.HW.W.0002.210221T2200Z-210222T1800Z/ Kootenai/Cabinet Region- 1042 AM MST Sun Feb 21 2021 ...HIGH WIND WARNING IN EFFECT FROM 3 PM THIS AFTERNOON TO 11 AM MST MONDAY... * WHAT...Southwest winds 25 to 35 mph with gusts up to 55 mph expected. * WHERE...Highway 2 Kalispell to Libby, Highway 37 Eureka to Libby, Highway 56 Bull Lake Road, and Highway 93 Eureka to Whitefish. * WHEN...From 3 PM this afternoon to 11 AM MST Monday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ MTZ003-221745- /O.NEW.KMSO.WI.Y.0003.210221T2200Z-210222T1800Z/ Flathead/Mission Valleys- 1042 AM MST Sun Feb 21 2021 ...WIND ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO 11 AM MST MONDAY... * WHAT...South winds 15 to 30 mph with gusts up to 40 mph expected. * WHERE...Flathead Lake, Flathead Valley, Mission Valley, and Polson. * WHEN...From 3 PM this afternoon to 11 AM MST Monday. * 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. && $$
2 follow-up statements
266 WWUS75 KMSO 220230 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 730 PM MST Sun Feb 21 2021 MTZ001-221800- /O.CON.KMSO.HW.W.0002.000000T0000Z-210222T1800Z/ Kootenai/Cabinet Region- 730 PM MST Sun Feb 21 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 11 AM MST MONDAY... * WHAT...Southwest winds 25 to 35 mph with gusts up to 55 mph expected. * WHERE...Highway 2 Kalispell to Libby, Highway 37 Eureka to Libby, Highway 56 Bull Lake Road, and Highway 93 Eureka to Whitefish. * WHEN...From 3 PM this afternoon to 11 AM MST Monday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ MTZ002-221200- /O.EXB.KMSO.WI.Y.0003.000000T0000Z-210222T1200Z/ West Glacier Region- 730 PM MST Sun Feb 21 2021 ...WIND ADVISORY IN EFFECT UNTIL 5 AM MST MONDAY... * WHAT...Southwest winds 15 to 30 mph with gusts up to 40 mph expected at lower elevations. Southwest wind gusts of 40 to 50 mph on US Highway 2 between Essex to Marias Pass. * WHERE...Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, and Polebridge. * WHEN...Until 5 AM MST Monday. * 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. && $$ MTZ003-221800- /O.CON.KMSO.WI.Y.0003.000000T0000Z-210222T1800Z/ Flathead/Mission Valleys- 730 PM MST Sun Feb 21 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST MONDAY... * WHAT...South winds 15 to 30 mph with gusts up to 40 mph expected. * WHERE...Flathead Lake, Flathead Valley, Mission Valley, and Polson. * WHEN...From 3 PM this afternoon to 11 AM MST Monday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
501 WWUS75 KMSO 221747 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 1047 AM MST Mon Feb 22 2021 MTZ001-221900- /O.EXP.KMSO.HW.W.0002.000000T0000Z-210222T1800Z/ Kootenai/Cabinet Region- 1047 AM MST Mon Feb 22 2021 ...HIGH WIND WARNING WILL EXPIRE AT 11 AM MST THIS MORNING... Wind speeds have decreased enough to allow the Warning to expire. $$ MTZ003-230600- /O.EXT.KMSO.WI.Y.0003.000000T0000Z-210223T0600Z/ Flathead/Mission Valleys- 1047 AM MST Mon Feb 22 2021 ...WIND ADVISORY NOW IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...South winds 15 to 30 mph with gusts up to 40 mph expected. A cold front will cross this evening, which will bring an additional increase in wind speeds and gusts, along with a change from rain to snow. * WHERE...Flathead Lake, Flathead Valley, Mission Valley, and Polson. * WHEN...Until 11 PM MST this evening. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 21, 8:20 AM MST | Winter Weather Advisory | MSO | Deer Lodge, Flathead, Granite, Lake, Lincoln, Mineral and 5 more | 71 hr |
| Feb 21, 10:39 AM MST | Winter Storm Warning | MSO | Flathead, Lake | 9 hr |
| Feb 21, 10:42 AM MST | Wind Advisory | MSO | Flathead, Lake, Sanders | 36 hr |
Nearby
High Wind Warnings in Montana, 2021Every high wind 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.