Alert archive / Montana / Winter Weather Advisories in 2026
Winter Weather Advisory 21, NWS Missoula, MT
NWS Missoula, MT issued this winter weather advisory at Apr 21, 2026, 1:50 PM MDT for 10 counties in Montana; Idaho County, Lemhi County, Idaho. It took effect at Apr 22, 2026, 6:00 PM MDT. It was in force for 40 hr.
The area
The counties it named.
The facts
- Issued
- Apr 21, 2026, 1:50 PM MDT (19:50 UTC)
- In effect from
- Apr 22, 2026, 6:00 PM MDT
- Expired
- Apr 24, 2026, 10:19 AM MDT
- In force
- 40 hr
- Issued by
- NWS Missoula, MT
Counties Idaho County, ID, Lemhi County, ID, Deer Lodge County, MT, Flathead County, MT, Granite County, MT, Lake County, MT, Mineral County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 43 km from the middle of the area, began a volume at 19:49 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.
Nearby
Winter Weather Advisories in Montana, 2026Winter Weather Advisories in Idaho, 2026Every winter weather advisory in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.