Alert archive / Montana / Winter Storm Warnings
Winter Storm Warnings in Montana, 2020
41 winter storm warnings in 2020. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of winter storm warnings reaches back to 2005.
Winter Storm Warnings by county
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Winter Storm Warnings
- 41
- Busiest month
- March8 winter storm warnings
- Busiest day
- January 11, 20203 winter storm warnings
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 6, 1:46 PM MST | Winter Storm Warning | TFX | 28 hr | |
| Jan 7, 8:21 AM MST | Winter Storm Warning | MSO | Flathead, Lake, Mineral, Missoula, Sanders | 9 hr |
| Jan 10, 4:02 AM MST | Winter Storm Warning | MSO | Flathead, Lincoln, Mineral, Missoula, Sanders | 35 hr |
| Jan 10, 10:20 PM MST | Winter Storm Warning | TFX | 7 hr | |
| Jan 11, 2:46 PM MST | Winter Storm Warning | MSO | Flathead, Lake, Lincoln, Mineral, Missoula, Sanders | 66 hr |
| Jan 11, 2:52 PM MST | Winter Storm Warning | TFX | 66 hr | |
| Feb 1, 2:15 PM MST | Winter Storm Warning | BYZ | Big Horn, Carbon, Park, Stillwater, Sweet Grass, Wheatland | 56 hr |
| Feb 4, 1:48 PM MST | Winter Storm Warning | MSO | Deer Lodge, Granite, Powell, Silver Bow | 66 hr |
| Feb 5, 3:38 AM MST | Winter Storm Warning | BYZ | Carbon, Park, Stillwater, Sweet Grass, Wheatland | 4 days |
| Feb 5, 3:47 AM MST | Winter Storm Warning | TFX | 58 hr | |
| Feb 8, 1:04 AM MST | Winter Storm Warning | TFX | 25 hr | |
| Feb 15, 1:18 PM MST | Winter Storm Warning | BYZ | Carbon, Park, Stillwater, Sweet Grass, Wheatland | 39 hr |
| Feb 24, 3:27 PM MST | Winter Storm Warning | BYZ | Carter | 19 hr |
| Mar 12, 3:50 AM MDT | Winter Storm Warning | TFX | 3 days | |
| Mar 12, 2:24 PM MDT | Winter Storm Warning | MSO | Flathead, Lake | 23 hr |
| Mar 12, 2:57 PM MDT | Winter Storm Warning | BYZ | Carbon, Golden Valley, Musselshell, Park, Stillwater, Sweet Grass and 1 more | 3 days |
| Mar 13, 3:27 AM MDT | Winter Storm Warning | GGW | Garfield, Petroleum, Phillips, Valley | 59 hr |
| Mar 24, 2:38 PM MDT | Winter Storm Warning | BYZ | Sweet Grass, Wheatland | 19 hr |
| Mar 30, 2:39 PM MDT | Winter Storm Warning | BYZ | Carbon, Park, Stillwater, Sweet Grass | 69 hr |
| Mar 31, 3:21 AM MDT | Winter Storm Warning | GGW | Garfield, Petroleum, Phillips | 35 hr |
| Mar 31, 2:14 PM MDT | Winter Storm Warning | TFX | 22 hr | |
| Apr 9, 1:47 PM MDT | Winter Storm Warning | TFX | 63 hr | |
| Apr 10, 3:01 AM MDT | Winter Storm Warning | BYZ | Big Horn, Carbon, Golden Valley, Park, Rosebud, Stillwater and 2 more | 56 hr |
| Apr 10, 3:26 AM MDT | Winter Storm Warning | MSO | Deer Lodge, Flathead, Granite, Lake, Missoula, Powell and 1 more | 42 hr |
| Apr 14, 3:10 AM MDT | Winter Storm Warning | BYZ | Carbon, Park, Stillwater, Sweet Grass, Wheatland | 45 hr |
| Jun 16, 10:40 AM MDT | Winter Storm Warning | MSO | Deer Lodge, Granite, Missoula, Powell, Ravalli, Silver Bow | 22 hr |
| Jun 16, 2:53 PM MDT | Winter Storm Warning | TFX | 18 hr | |
| Sep 7, 3:15 AM MDT | Winter Storm Warning | BYZ | Big Horn, Carbon, Park, Stillwater, Sweet Grass | 26 hr |
| Oct 17, 10:22 AM MDT | Winter Storm Warning | TFX | 8 hr | |
| Oct 21, 4:34 AM MDT | Winter Storm Warning | BYZ | Big Horn, Carbon, Park, Stillwater, Sweet Grass, Wheatland | 37 hr |
| Oct 21, 10:27 AM MDT | Winter Storm Warning | GGW | Daniels, McCone, Phillips, Roosevelt, Valley | 22 hr |
| Oct 21, 10:30 AM MDT | Winter Storm Warning | TFX | 22 hr | |
| Oct 22, 1:55 PM MDT | Winter Storm Warning | MSO | Deer Lodge, Flathead, Granite, Lake, Mineral, Missoula and 4 more | 52 hr |
| Oct 22, 2:03 PM MDT | Winter Storm Warning | TFX | 55 hr | |
| Oct 23, 2:56 AM MDT | Winter Storm Warning | GGW | Petroleum, Phillips | 42 hr |
| Oct 23, 3:58 AM MDT | Winter Storm Warning | BYZ | Big Horn, Carbon, Golden Valley, Musselshell, Park, Rosebud and 5 more | 50 hr |
| Nov 6, 1:37 PM MST | Winter Storm Warning | TFX | 54 hr | |
| Nov 6, 2:45 PM MST | Winter Storm Warning | GGW | Daniels, Garfield, McCone, Petroleum, Phillips, Roosevelt and 2 more | 69 hr |
| Nov 7, 3:36 AM MST | Winter Storm Warning | MSO | Deer Lodge, Flathead, Granite, Lake, Missoula, Powell and 2 more | 35 hr |
| Nov 7, 3:51 AM MST | Winter Storm Warning | BYZ | Carbon, Golden Valley, Musselshell, Park, Rosebud, Stillwater and 4 more | 37 hr |
| Nov 10, 9:48 PM MST | Winter Storm Warning | MSO | Granite, Lake, Missoula, Powell, Ravalli | 7 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Sweet Grass County12
- Carbon County11
- Park County11
- Stillwater County11
- Wheatland County10
- Missoula County8
- Flathead County7
- Lake County7
- Granite County6
- Powell County6
- Big Horn County5
- Deer Lodge County5
- Silver Bow County5
- Phillips County5
- Mineral County4
- Sanders County4
- Golden Valley County4
- Petroleum County4
- Ravalli County4
- Musselshell County3
- Garfield County3
- Valley County3
- Rosebud County3
- Lincoln County2
- Daniels County2
- McCone County2
- Roosevelt County2
- Treasure County2
- Yellowstone County2
- Carter County1
- Sheridan County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.