Alert archive / Montana / Severe Thunderstorm Warnings / 2020
Severe Thunderstorm Warnings in Montana, August 2020
40 severe thunderstorm warnings in August 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 severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in August 2020. Tap one for its archive.
- Severe Thunderstorm Warnings
- 40
- Busiest day
- August 20, 202010 severe thunderstorm warnings
Over time
By day
Days in UTC, the clock the archive keeps.
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 |
|---|---|---|---|---|
| Jul 31, 6:11 PM MDT | Severe Thunderstorm Warning | TFX | Hill | 34 min |
| Jul 31, 6:26 PM MDT | Severe Thunderstorm Warning | TFX | Liberty | 34 min |
| Jul 31, 6:59 PM MDT | Severe Thunderstorm Warning | TFX | Liberty | 31 min |
| Jul 31, 7:27 PM MDT | Severe Thunderstorm Warning | TFX | Liberty | 48 min |
| Aug 3, 12:19 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 41 min |
| Aug 3, 5:49 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin, Madison | 26 min |
| Aug 3, 6:02 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 28 min |
| Aug 3, 6:54 PM MDT | Severe Thunderstorm Warning | BYZ | Park | 36 min |
| Aug 3, 9:19 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 41 min |
| Aug 6, 3:30 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 19 min |
| Aug 6, 4:57 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 49 min |
| Aug 6, 5:09 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 51 min |
| Aug 6, 6:14 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 76 min |
| Aug 6, 7:28 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 32 min |
| Aug 6, 8:07 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 38 min |
| Aug 11, 8:19 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 21 min |
| Aug 12, 4:17 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 13 min |
| Aug 12, 5:33 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Sheridan | 42 min |
| Aug 12, 6:13 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt | 48 min |
| Aug 19, 6:16 PM MDT | Severe Thunderstorm Warning | TFX | Madison | 29 min |
| Aug 20, 2:22 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark, Teton | 38 min |
| Aug 20, 2:55 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark, Pondera, Teton, Toole | 35 min |
| Aug 20, 3:28 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Liberty, Pondera, Teton, Toole | 32 min |
| Aug 20, 4:17 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 28 min |
| Aug 20, 4:54 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 21 min |
| Aug 20, 4:58 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Lewis and Clark, Meagher | 32 min |
| Aug 20, 5:14 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 31 min |
| Aug 20, 5:35 PM MDT | Severe Thunderstorm Warning | TFX | Meagher | 25 min |
| Aug 20, 5:37 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 38 min |
| Aug 20, 7:42 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 48 min |
| Aug 20, 8:04 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley | 26 min |
| Aug 20, 8:49 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Phillips, Valley | 56 min |
| Aug 20, 9:12 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Prairie | 63 min |
| Aug 20, 9:43 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Dawson, Garfield, McCone, Prairie, Richland and 2 more | 62 min |
| Aug 20, 10:43 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 47 min |
| Aug 20, 10:43 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Dawson, McCone, Prairie, Richland, Roosevelt and 3 more | 62 min |
| Aug 25, 10:00 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Prairie | 60 min |
| Aug 26, 5:51 PM MDT | Severe Thunderstorm Warning | TFX | Madison | 24 min |
| Aug 26, 5:53 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 22 min |
| Aug 27, 4:03 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Valley | 28 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- McCone County6
- Garfield County5
- Valley County5
- Roosevelt County5
- Liberty County4
- Judith Basin County4
- Cascade County4
- Prairie County4
- Madison County3
- Fergus County3
- Sheridan County3
- Richland County3
- Lewis and Clark County3
- Teton County3
- Daniels County3
- Big Horn County2
- Yellowstone County2
- Carter County2
- Pondera County2
- Toole County2
- Meagher County2
- Phillips County2
- Dawson County2
- Hill County1
- Gallatin County1
- Park County1
- Powder River County1
- Chouteau County1
- Broadwater County1
- Golden Valley County1
- Custer County1
- Wibaux County1
- Ravalli County1
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.