Alert archive / Montana / Wind Advisories in 2025
Wind Advisory 13, NWS Missoula, MT
NWS Missoula, MT issued this wind advisory at Dec 18, 2025, 11:21 AM MST for 10 counties in Montana. It took effect at Dec 18, 2025, 11:00 PM MST. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Dec 18, 2025, 11:21 AM MST (18:21 UTC)
- In effect from
- Dec 18, 2025, 11:00 PM MST
- Expired
- Dec 19, 2025, 11:00 AM MST
- In force
- 12 hr
- Issued by
- NWS Missoula, MT
Counties Deer Lodge County, MT, Flathead County, MT, Granite County, MT, Lake County, MT, Lincoln County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 8 km from the middle of the area, began a volume at 18:25 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
Boise Airport, ID (KBOI), launched 12:00Z, 6.4 hours before the alert went out and 427 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
- 1761 m above ground
- 0-6 km bulk shear
- 95 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 208 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
938 WWUS75 KMSO 181821 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 1121 AM MST Thu Dec 18 2025 MTZ001-191500- /O.NEW.KMSO.WI.Y.0013.251219T0600Z-251219T1500Z/ Kootenai/Cabinet Region- 1121 AM MST Thu Dec 18 2025 ...WIND ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 8 AM MST FRIDAY... * WHAT...Southwest winds 15 to 25 mph with gusts up to 50 mph expected. * WHERE...Kootenai/Cabinet Region. * WHEN...From 11 PM this evening to 8 AM MST Friday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. && $$ MTZ003-191800- /O.NEW.KMSO.WI.Y.0013.251219T0900Z-251219T1800Z/ Flathead/Mission Valleys- 1121 AM MST Thu Dec 18 2025 ...WIND ADVISORY IN EFFECT FROM 2 AM TO 11 AM MST FRIDAY... * WHAT...Southwest winds 15 to 20 mph with gusts up to 50 mph expected. * WHERE...Flathead/Mission Valleys. * WHEN...From 2 AM to 11 AM MST Friday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. && $$ MTZ005-191800- /O.NEW.KMSO.WI.Y.0013.251219T0900Z-251219T1800Z/ Missoula/Bitterroot Valleys- 1121 AM MST Thu Dec 18 2025 ...WIND ADVISORY IN EFFECT FROM 2 AM TO 11 AM MST FRIDAY... * WHAT...Southwest winds 10 to 20 mph with gusts up to 50 mph expected mainly in the Bitterroot Valley. * WHERE...Missoula/Bitterroot Valleys. * WHEN...From 2 AM to 11 AM MST Friday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. && $$ MTZ007-043-191800- /O.NEW.KMSO.WI.Y.0013.251219T0900Z-251219T1800Z/ Butte/Blackfoot Region-Potomac/Seeley Lake Region- 1121 AM MST Thu Dec 18 2025 ...WIND ADVISORY IN EFFECT FROM 2 AM TO 11 AM MST FRIDAY... * WHAT...West winds 20 to 30 mph with gusts up to 55 mph expected. * WHERE...Butte/Blackfoot Region and Potomac/Seeley Lake Region. * WHEN...From 2 AM to 11 AM MST Friday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. && $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 18, 12:26 AM MST | Winter Storm Warning | MSO | Granite, Missoula, Ravalli | 41 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.