Alert archive / Montana / Wind Advisories in 2021
Wind Advisory 11, NWS Missoula, MT
NWS Missoula, MT issued this wind advisory at Nov 13, 2021, 1:30 PM MST for 4 counties in Montana. It took effect at Nov 14, 2021, 9:00 AM MST. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Nov 13, 2021, 1:30 PM MST (20:30 UTC)
- In effect from
- Nov 14, 2021, 9:00 AM MST
- Expired
- Nov 14, 2021, 6:00 PM MST
- In force
- 9 hr
- Issued by
- NWS Missoula, MT
Counties Deer Lodge County, MT, Granite County, MT, Powell County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 110 km from the middle of the area, began a volume at 20:29 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
Great_falls, MT (KTFX), launched 12:00Z, 8.5 hours before the alert went out and 225 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
- 1764 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 239 m²/s²
- 0-3 km storm-relative helicity
- 400 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
899 WWUS75 KMSO 132030 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 130 PM MST Sat Nov 13 2021 MTZ007-142030- /O.NEW.KMSO.WI.Y.0011.211114T1600Z-211115T0100Z/ Butte/Blackfoot Region- 130 PM MST Sat Nov 13 2021 ...WIND ADVISORY IN EFFECT FROM 9 AM TO 6 PM MST SUNDAY... * WHAT...West winds 30 to 40 mph with gusts around 50 mph expected. * WHERE...Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...From 9 AM to 6 PM MST Sunday. * 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. && $$
2 follow-up statements
694 WWUS75 KMSO 132204 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 304 PM MST Sat Nov 13 2021 MTZ003-150400- /O.NEW.KMSO.LW.Y.0008.211114T1600Z-211115T0400Z/ Flathead/Mission Valleys- 304 PM MST Sat Nov 13 2021 ...LAKE WIND ADVISORY IN EFFECT FROM 9 AM TO 9 PM MST SUNDAY FOR FLATHEAD LAKE... * WHAT...Waves 1 to 3 feet with south winds 20 to 30 mph with gusts up to 35 mph expected on Flathead Lake. * WHERE...Flathead/Mission Valleys. * WHEN...From 9 AM to 9 PM MST Sunday. * IMPACTS...Strong winds and rough waves will create hazardous conditions for small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Boaters on area lakes should use extra caution since strong winds and rough waves can overturn small craft. && $$ MTZ007-150100- /O.CON.KMSO.WI.Y.0011.211114T1600Z-211115T0100Z/ Butte/Blackfoot Region- 304 PM MST Sat Nov 13 2021 ...WIND ADVISORY REMAINS IN EFFECT FROM 9 AM TO 6 PM MST SUNDAY... * WHAT...West winds 30 to 40 mph with gusts around 50 mph expected. * WHERE...Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...From 9 AM to 6 PM MST Sunday. * 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. && $$
871 WWUS75 KMSO 142012 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 112 PM MST Sun Nov 14 2021 MTZ007-160200- /O.NEW.KMSO.HW.A.0005.211116T0200Z-211116T1200Z/ /O.CON.KMSO.WI.Y.0011.000000T0000Z-211115T0100Z/ Butte/Blackfoot Region- 112 PM MST Sun Nov 14 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM MST THIS EVENING... ...HIGH WIND WATCH IN EFFECT FROM MONDAY EVENING THROUGH LATE MONDAY NIGHT... * WHAT...For the Wind Advisory, west winds 30 to 40 mph with gusts up to 45 mph. For the High Wind Watch, southwest winds 25 to 35 mph with gusts up to 55 mph, isolated higher gusts possible. * WHERE...Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...For the Wind Advisory, until 6 PM MST this evening. For the High Wind Watch, from Monday evening through late Monday night. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ MTZ003-160200- /O.NEW.KMSO.HW.A.0005.211115T2200Z-211116T0600Z/ /O.CON.KMSO.LW.Y.0008.000000T0000Z-211115T0400Z/ Flathead/Mission Valleys- 112 PM MST Sun Nov 14 2021 ...LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL 9 PM MST THIS EVENING FOR FLATHEAD LAKE... ...HIGH WIND WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH MONDAY EVENING... * WHAT...For the Lake Wind Advisory on Flathead Lake, waves 1 to 3 feet with south winds 20 to 25 mph with gusts up to 30 mph. For the High Wind Watch, southwest winds 20 to 30 mph with gusts up to 40 mph, isolated higher gusts possible. * WHERE...Flathead Lake, Flathead Valley, Mission Valley, and Polson. * WHEN...For the Lake Wind Advisory, until 9 PM MST this evening. For the High Wind Watch, from Monday afternoon through Monday 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. && $$ MTZ001-002-004-160200- /O.NEW.KMSO.HW.A.0005.211115T2200Z-211116T0600Z/ Kootenai/Cabinet Region-West Glacier Region- Lower Clark Fork Region- 112 PM MST Sun Nov 14 2021 ...HIGH WIND WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH MONDAY EVENING... * WHAT...Southwest winds 25 to 35 mph with gusts up to 50 mph, isolated higher gusts possible. * WHERE...Kootenai/Cabinet Region, West Glacier Region and Lower Clark Fork Region. * WHEN...From Monday afternoon through Monday evening. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ MTZ005-006-043-160200- /O.NEW.KMSO.HW.A.0005.211116T0200Z-211116T1200Z/ Missoula/Bitterroot Valleys-Bitterroot/Sapphire Mountains- Potomac/Seeley Lake Region- 112 PM MST Sun Nov 14 2021 ...HIGH WIND WATCH IN EFFECT FROM MONDAY EVENING THROUGH LATE MONDAY NIGHT... * WHAT...Southwest winds 25 to 35 mph with gusts up to 50 mph, isolated higher gusts possible. * WHERE...Bitterroot Valley, Missoula, Highway 93 Sula to Lost Trail Pass, Lolo Pass, Highway 200 Bonner to Greenough, Highway 83 Seeley Lake to Condon, and I-90 East Missoula to Bearmouth. * WHEN...From Monday evening through late Monday night. * 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. && $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 13, 1:30 PM MST | Winter Weather Advisory | MSO | Flathead, Lake, Lincoln, Sanders | 15 hr |
| Nov 13, 3:04 PM MST | Lake Wind Advisory | MSO | Flathead, Lake, Sanders | 30 hr |
Nearby
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.