Alert archive / Montana / High Wind Watches in 2017
High Wind Watch 2, NWS Missoula, MT
NWS Missoula, MT issued this high wind watch at Nov 21, 2017, 1:14 PM MST for 9 counties in Montana. It took effect at Nov 23, 2017, 5:00 PM MST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Nov 21, 2017, 1:14 PM MST (20:14 UTC)
- In effect from
- Nov 23, 2017, 5:00 PM MST
- Expired
- Nov 23, 2017, 3:27 AM MST
- In force
- 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, Ravalli County, MT, Sanders County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 27 km from the middle of the area, began a volume at 20:20 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, 8.2 hours before the alert went out and 222 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
- 858 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 165 m²/s²
- 0-3 km storm-relative helicity
- 269 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
777 WWUS75 KMSO 212014 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 114 PM MST Tue Nov 21 2017 MTZ002-003-005>007-043-232015- /O.NEW.KMSO.HW.A.0002.171124T0000Z-171124T1200Z/ West Glacier Region-Flathead/Mission Valleys- Missoula/Bitterroot Valleys-Bitterroot/Sapphire Mountains- Butte/Blackfoot Region-Potomac/Seeley Lake Region- 114 PM MST Tue Nov 21 2017 ...HIGH WIND WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE THURSDAY NIGHT... The National Weather Service in Missoula has issued a High Wind Watch...which is in effect from Thursday afternoon through late Thursday night. * Impacts/Timing: A strong cold front moving through the Northern Rockies on Thanksgiving day, has the potential to produce strong, and potentially damaging wind gusts. Impacting area trees and powerlines, starting late afternoon Thursday across Northwestern Montana, and during the evening after sunset for the rest of western Montana. * Winds: West-southwest winds sustained at 25 to 35 mph, with gusts of 50 to 60 mph along the cold front. * Locations impacted include: Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, Polebridge, Flathead Lake, Flathead Valley, Mission Valley, Polson, Bitterroot Valley, Missoula, Highway 93 Sula to Lost Trail Pass, Lolo Pass, 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 $$
2 follow-up statements
134 WWUS75 KMSO 230546 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 1046 PM MST Wed Nov 22 2017 MTZ005-240600- /O.NEW.KMSO.FG.Y.0005.171123T0546Z-171123T1800Z/ /O.CON.KMSO.HW.A.0002.171124T0000Z-171124T1200Z/ Missoula/Bitterroot Valleys- 1046 PM MST Wed Nov 22 2017 ...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM MST THURSDAY FOR BITTERROOT VALLEY AND MISSOULA... ...HIGH WIND WATCH REMAINS IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE THURSDAY NIGHT FOR BITTERROOT VALLEY AND MISSOULA... The National Weather Service in Missoula has issued a Dense Fog Advisory...which is in effect until 11 AM MST Thursday. * Impacts/Timing: Dense fog will occur through Thursday morning with visibility lowering to less than one quarter mile at times. Temperatures at or below freezing could cause a thin layer of ice to form on roadways, particularly on bridges and overpasses. * Visibility: Less than one quarter mile. * Locations impacted include: Missoula valley, Bitterroot valley, I-90 near Missoula. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Dense Fog Advisory means visibilities will frequently be reduced to less than one quarter mile. If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ MTZ004-231800- /O.NEW.KMSO.FG.Y.0005.171123T0546Z-171123T1800Z/ Lower Clark Fork Region- 1046 PM MST Wed Nov 22 2017 ...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM MST THURSDAY... The National Weather Service in Missoula has issued a Dense Fog Advisory...which is in effect until 11 AM MST Thursday. * Impacts/Timing: Dense fog will occur through Thursday morning with visibility lowering to less than one quarter mile at times. Temperatures at or below freezing could cause a thin layer of ice to form on roadways, particularly on bridges and overpasses. * Visibility: Less than one quarter mile. * Locations impacted include: Evaro Hill, Highway 200 Thompson Falls to Plains, Highway 200 Trout Creek to Heron, and I- 90 Lookout Pass to Haugan PRECAUTIONARY/PREPAREDNESS ACTIONS... A Dense Fog Advisory means visibilities will frequently be reduced to less than one quarter mile. If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ MTZ002-003-006-007-043-240600- /O.CON.KMSO.HW.A.0002.171124T0000Z-171124T1200Z/ West Glacier Region-Flathead/Mission Valleys- Bitterroot/Sapphire Mountains-Butte/Blackfoot Region- Potomac/Seeley Lake Region- 1046 PM MST Wed Nov 22 2017 ...HIGH WIND WATCH REMAINS IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE THURSDAY NIGHT... * Impacts/Timing: A strong cold front moving through the Northern Rockies on Thanksgiving day, has the potential to produce strong, and potentially damaging wind gusts. Impacting area trees and powerlines, starting late afternoon Thursday across Northwestern Montana, and during the evening after sunset for the rest of western Montana. * Winds: West-southwest winds sustained at 25 to 35 mph, with gusts of 50 to 60 mph along the cold front. * Locations impacted include: Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, Polebridge, Flathead Lake, Flathead Valley, Mission Valley, Polson, Highway 93 Sula to Lost Trail Pass, Lolo Pass, Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, MacDonald Pass, Highway 200 Bonner to Greenough, Highway 83 Seeley Lake to Condon, and I- 90 East Missoula to Bearmouth $$
870 WWUS75 KMSO 231027 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 327 AM MST Thu Nov 23 2017 MTZ005-241100- /O.CAN.KMSO.FG.Y.0005.000000T0000Z-171123T1800Z/ /O.UPG.KMSO.HW.A.0002.171124T0000Z-171124T1200Z/ /O.NEW.KMSO.WI.Y.0008.171124T0000Z-171124T1200Z/ Missoula/Bitterroot Valleys- 327 AM MST Thu Nov 23 2017 ...WIND ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST FRIDAY FOR BITTERROOT VALLEY AND MISSOULA... The National Weather Service in Missoula has issued a Wind Advisory...which is in effect from 5 PM this afternoon to 5 AM MST Friday. * Impacts/Timing: A strong cold front moving through the region today will produce gusty winds after 5 PM. The threat for widespread damaging winds has lessened quite a bit the past 24 hours. However...isolated areas could still see a very brief period of winds that could cause localized tree damage. * Winds: West-southwest winds sustained at 20 to 30 mph, with gusts of 40 to 45 mph along the cold front. * Locations Impacted: Missoula and Bitterroot Valley. $$ MTZ004-231130- /O.CAN.KMSO.FG.Y.0005.000000T0000Z-171123T1800Z/ Lower Clark Fork Region- 327 AM MST Thu Nov 23 2017 ...DENSE FOG ADVISORY IS CANCELLED... $$ MTZ002-003-241100- /O.UPG.KMSO.HW.A.0002.171124T0000Z-171124T1200Z/ /O.NEW.KMSO.WI.Y.0008.171123T2000Z-171124T0600Z/ West Glacier Region-Flathead/Mission Valleys- 327 AM MST Thu Nov 23 2017 ...WIND ADVISORY IN EFFECT FROM 1 PM THIS AFTERNOON TO 11 PM MST THIS EVENING... The National Weather Service in Missoula has issued a Wind Advisory...which is in effect from 1 PM this afternoon to 11 PM MST this evening. The High Wind Watch is no longer in effect. * Impacts/Timing: A strong cold front moving through the region today will produce gusty winds after 1 PM. The threat for widespread damaging winds has lessened quite a bit the past 24 hours. However...isolated areas could still see a very brief period of winds that could cause localized tree damage. * Winds: West-southwest winds sustained at 20 to 30 mph, with gusts of 40 to 45 mph along the cold front. * Locations impacted include: Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, Polebridge, Flathead Lake, Flathead Valley, Mission Valley, and Polson $$ MTZ006-007-043-241100- /O.UPG.KMSO.HW.A.0002.171124T0000Z-171124T1200Z/ /O.NEW.KMSO.WI.Y.0008.171124T0000Z-171124T1200Z/ Bitterroot/Sapphire Mountains-Butte/Blackfoot Region- Potomac/Seeley Lake Region- 327 AM MST Thu Nov 23 2017 ...WIND ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST FRIDAY... The National Weather Service in Missoula has issued a Wind Advisory...which is in effect from 5 PM this afternoon to 5 AM MST Friday. The High Wind Watch is no longer in effect. * Impacts/Timing: A strong cold front moving through the region today will produce gusty winds after 5 PM. The threat for widespread damaging winds has lessened quite a bit the past 24 hours. However...isolated areas could still see a very brief period of winds that could cause localized tree damage. * Winds: West-southwest winds sustained at 20 to 30 mph, with gusts of 40 to 45 mph along the cold front. * Locations impacted include: Highway 93 Sula to Lost Trail Pass, Lolo Pass, Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, MacDonald Pass, Highway 200 Bonner to Greenough, Highway 83 Seeley Lake to Condon, and I- 90 East Missoula to Bearmouth $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 21, 4:45 AM MST | Dense Fog Advisory | MSO | Granite, Lake, Mineral, Missoula, Powell, Ravalli and 1 more | 6 hr |
Nearby
High Wind Watches in Montana, 2017Every high wind watch in 2017
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.