Alert archive / Montana / Snow Squall Warnings in 2025

Snow Squall Warning 6, NWS Missoula, MT

December 26, 2025Mineral County, Montana

NWS Missoula, MT issued this snow squall warning at Dec 26, 2025, 9:40 PM MST for Mineral County, Montana. It was in force for 65 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Dec 26, 2025, 9:40 PM MST (04:40 UTC)
Expired
Dec 26, 2025, 10:45 PM MST
In force
65 min
Issued by
NWS Missoula, MT
Area
Storm-based polygon

County Mineral County, MT

The radar

The Missoula radar (KMSX), 78 km from the middle of the area, began a volume at 04:41 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 00:00Z, 4.7 hours before the alert went out and 409 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.

Skew-T log-pSkew-T log-p diagram, Boise Airport, ID at 00:00Z on 2025-12-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 22 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Boise Airport, ID at 00:00Z on 2025-12-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
22 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
1996 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
53 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Missoula, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 26, 10:33 PM MSTSpecial Weather StatementMSOMineral42 min
Dec 27, 7:54 AM MSTSpecial Weather StatementMSOMissoula36 min
Dec 27, 8:43 AM MSTSnow Squall WarningMSOMissoula32 min
Dec 27, 9:17 AM MSTSnow Squall Warning Significant damage threatMSOGranite, Missoula32 min
Dec 27, 1:37 PM MSTSpecial Weather StatementMSOMissoula23 min
Dec 27, 1:43 PM MSTSpecial Weather StatementMSOFlathead32 min
Dec 27, 2:10 PM MSTSpecial Weather StatementMSOMissoula35 min
Dec 26, 9:22 PM MSTSpecial Weather StatementMSOShoshone38 min

Nearby

Snow Squall Warnings in Montana, 2025Every snow squall warning in 2025

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.