Alert archive / Montana / Wind Advisories in 2021
Wind Advisory 14, NWS Missoula, MT
NWS Missoula, MT issued this wind advisory at Dec 3, 2021, 1:29 PM MST for 6 counties in Montana; Lemhi County, Idaho. It took effect at Dec 4, 2021, 9:00 AM MST. It was in force for 10 hr.
The area
The counties it named.
The facts
- Issued
- Dec 3, 2021, 1:29 PM MST (20:29 UTC)
- In effect from
- Dec 4, 2021, 9:00 AM MST
- Expired
- Dec 4, 2021, 7:00 PM MST
- In force
- 10 hr
- Issued by
- NWS Missoula, MT
Counties Lemhi County, ID, Deer Lodge County, MT, Granite County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 104 km from the middle of the area, began a volume at 20:32 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 258 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
- 1190 m above ground
- 0-6 km bulk shear
- 103 kt
- 0-1 km storm-relative helicity
- 199 m²/s²
- 0-3 km storm-relative helicity
- 418 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
174 WWUS75 KMSO 032029 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 129 PM MST Fri Dec 3 2021 MTZ007-042030- /O.NEW.KMSO.WI.Y.0014.211204T1600Z-211205T0600Z/ Butte/Blackfoot Region- 129 PM MST Fri Dec 3 2021 ...WIND ADVISORY IN EFFECT FROM 9 AM TO 11 PM MST SATURDAY... * WINDS...West winds 25 to 35 mph with gusts up to 50 mph expected. Gusts over 50 mph are possible in typically winder locations such as MacDonald Pass. * SNOW...While winds will be the main impact, there is potential for snow showers that will cause a reduction of visibility and rapidly changing road conditions. * WHERE...Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...From 9 AM to 11 PM MST Saturday. * 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. && $$ MTZ005-042030- /O.NEW.KMSO.WI.Y.0014.211204T1800Z-211205T0100Z/ Missoula/Bitterroot Valleys- 129 PM MST Fri Dec 3 2021 ...WIND ADVISORY IN EFFECT FROM 11 AM TO 6 PM MST SATURDAY... * WHAT...Southwest winds 15 to 25 mph with gusts up to 45 mph expected. * WHERE...Missoula/Bitterroot Valleys. * WHEN...From 11 AM to 6 PM MST Saturday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
4 follow-up statements
497 WWUS75 KMSO 041008 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 308 AM MST Sat Dec 4 2021 MTZ007-050300- /O.EXT.KMSO.WI.Y.0014.211204T1600Z-211205T0300Z/ Butte/Blackfoot Region- 308 AM MST Sat Dec 4 2021 ...WIND ADVISORY NOW IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MST THIS EVENING... * WINDS...West winds 25 to 35 mph with gusts up to 50 mph expected. Gusts over 50 mph are possible in typically winder locations such as MacDonald Pass. * WHERE...Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...From 9 AM this morning to 8 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. && $$ MTZ005-050100- /O.CON.KMSO.WI.Y.0014.211204T1800Z-211205T0100Z/ Missoula/Bitterroot Valleys- 308 AM MST Sat Dec 4 2021 ...WIND ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 6 PM MST THIS EVENING... * WHAT...Southwest winds 20 to 30 mph with gusts up to 45 mph expected. * WHERE...Missoula/Bitterroot Valleys. * WHEN...From 11 AM to 6 PM MST Saturday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
055 WWUS75 KMSO 041755 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 1055 AM MST Sat Dec 4 2021 IDZ009-010-050200- /O.EXB.KMSO.WI.Y.0014.211204T2000Z-211205T0200Z/ Western Lemhi County-Eastern Lemhi County- 1055 AM MST Sat Dec 4 2021 ...WIND ADVISORY IN EFFECT UNTIL 7 PM MST THIS EVENING... * WINDS...West winds 25 to 35 mph with gusts up to 50 mph expected. Gusts over 50 mph are possible in the higher elevations including Williams Creek Summit. * WHERE...Bannock Pass, Highway 28 Tendoy to Lone Pine, Highway 93 Lost Trail Pass to Gibbonsville, Lemhi Pass, and Salmon. * WHEN...Until 7 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. && $$ MTZ007-050300- /O.CON.KMSO.WI.Y.0014.000000T0000Z-211205T0300Z/ Butte/Blackfoot Region- 1055 AM MST Sat Dec 4 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST THIS EVENING... * WHAT...West winds 25 to 35 mph with gusts up to 50 mph expected. Gusts over 50 mph are possible in typically winder locations such as MacDonald Pass and also Interstate 15 near Butte. * WHERE...Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...From 9 AM this morning to 8 PM MST this evening. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ MTZ005-050100- /O.CON.KMSO.WI.Y.0014.211204T1800Z-211205T0100Z/ Missoula/Bitterroot Valleys- 1055 AM MST Sat Dec 4 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM MST THIS EVENING... * WHAT...Southwest winds 20 to 30 mph with gusts up to 45 mph expected. Gusts to 50 mph are possible in the Bitterroot Valley. * WHERE...Missoula/Bitterroot Valleys. * WHEN...From 11 AM to 6 PM MST Saturday. * 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. && $$
353 WWUS75 KMSO 050030 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 530 PM MST Sat Dec 4 2021 MTZ005-050130- /O.EXP.KMSO.WI.Y.0014.000000T0000Z-211205T0100Z/ Missoula/Bitterroot Valleys- 530 PM MST Sat Dec 4 2021 ...WIND ADVISORY WILL EXPIRE AT 6 PM MST THIS EVENING... $$ MTZ007-050300- /O.CON.KMSO.WI.Y.0014.000000T0000Z-211205T0300Z/ Butte/Blackfoot Region- 530 PM MST Sat Dec 4 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST THIS EVENING... * WHAT...West winds 25 to 35 mph with gusts up to 50 mph. * WHERE...Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass. * WHEN...Until 8 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. && $$ IDZ009-010-050200- /O.CON.KMSO.WI.Y.0014.000000T0000Z-211205T0200Z/ Western Lemhi County-Eastern Lemhi County- 530 PM MST Sat Dec 4 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING... * WHAT...West winds 20 to 30 mph with gusts up to 45 mph. * WINDS...West winds 25 to 35 mph with gusts up to 50 mph expected. Gusts over 50 mph are possible in the higher elevations including Williams Creek Summit. * WHERE...Shoup, Bannock Pass, Highway 28 Tendoy to Lone Pine, Highway 93 Lost Trail Pass to Gibbonsville, Lemhi Pass, and Salmon. * WHEN...Until 7 PM MST this evening. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
730 WWUS75 KMSO 050136 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 636 PM MST Sat Dec 4 2021 MTZ007-050245- /O.CAN.KMSO.WI.Y.0014.000000T0000Z-211205T0300Z/ Butte/Blackfoot Region- 636 PM MST Sat Dec 4 2021 ...WIND ADVISORY IS CANCELLED... $$ IDZ009-010-050245- /O.EXP.KMSO.WI.Y.0014.000000T0000Z-211205T0200Z/ Western Lemhi County-Eastern Lemhi County- 636 PM MST Sat Dec 4 2021 ...WIND ADVISORY WILL EXPIRE AT 7 PM MST THIS EVENING... $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 3, 1:25 PM MST | Winter Weather Advisory | MSO | Deer Lodge, Flathead, Granite, Lake, Lincoln, Mineral and 5 more | 46 hr |
Nearby
Wind Advisories in Montana, 2021Wind Advisories in Idaho, 2021Every wind 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.