Alert archive / Montana / Severe Thunderstorm Warnings / 2011
Severe Thunderstorm Warnings in Montana, August 2011
62 severe thunderstorm warnings in August 2011. 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 2011. Tap one for its archive.
- Severe Thunderstorm Warnings
- 62
- Busiest day
- August 11, 201119 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 |
|---|---|---|---|---|
| Aug 1, 9:03 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 42 min |
| Aug 2, 3:34 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 56 min |
| Aug 2, 4:29 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Sheridan | 61 min |
| Aug 2, 5:16 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 59 min |
| Aug 2, 6:16 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Sheridan | 59 min |
| Aug 3, 1:31 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Jefferson, Lewis and Clark | 29 min |
| Aug 3, 2:30 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater | 45 min |
| Aug 4, 3:58 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 62 min |
| Aug 4, 4:56 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Fallon | 64 min |
| Aug 4, 5:14 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Wibaux | 46 min |
| Aug 4, 5:28 PM MDT | Severe Thunderstorm Warning | GGW | Dawson | 15 min |
| Aug 4, 5:57 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Fallon | 52 min |
| Aug 4, 5:57 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 32 min |
| Aug 5, 4:11 AM MDT | Severe Thunderstorm Warning | GGW | Daniels, Valley | 64 min |
| Aug 5, 3:29 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 31 min |
| Aug 5, 4:13 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 62 min |
| Aug 5, 6:27 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 63 min |
| Aug 7, 3:28 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 62 min |
| Aug 11, 1:49 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 56 min |
| Aug 11, 2:42 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 63 min |
| Aug 11, 3:00 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt | 14 min |
| Aug 11, 3:16 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 59 min |
| Aug 11, 3:48 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 57 min |
| Aug 11, 4:00 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 60 min |
| Aug 11, 4:06 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie | 39 min |
| Aug 11, 4:35 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 25 min |
| Aug 11, 4:37 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 38 min |
| Aug 11, 4:55 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 35 min |
| Aug 11, 4:56 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 34 min |
| Aug 11, 5:04 PM MDT | Severe Thunderstorm Warning | GGW | Prairie, Wibaux | 56 min |
| Aug 11, 5:11 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Fallon | 64 min |
| Aug 11, 5:12 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 49 min |
| Aug 11, 5:26 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 26 min |
| Aug 11, 5:29 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Powder River | 46 min |
| Aug 11, 5:36 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 39 min |
| Aug 11, 5:37 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River, Rosebud | 53 min |
| Aug 11, 5:41 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 49 min |
| Aug 11, 6:27 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 48 min |
| Aug 11, 7:04 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 56 min |
| Aug 14, 5:32 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 28 min |
| Aug 14, 5:38 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 18 min |
| Aug 14, 5:59 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 17 min |
| Aug 14, 6:58 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Valley | 62 min |
| Aug 14, 7:58 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Valley | 62 min |
| Aug 14, 8:28 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 15 min |
| Aug 14, 8:54 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 36 min |
| Aug 14, 9:20 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Sheridan | 42 min |
| Aug 14, 10:35 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Hill, Liberty, Pondera, Teton | 40 min |
| Aug 15, 6:52 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 37 min |
| Aug 15, 8:08 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 40 min |
| Aug 15, 10:02 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Roosevelt | 47 min |
| Aug 21, 5:11 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell, Stillwater, Yellowstone | 64 min |
| Aug 21, 5:34 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Stillwater, Yellowstone | 56 min |
| Aug 26, 3:53 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Stillwater | 37 min |
| Aug 27, 8:12 PM MDT | Severe Thunderstorm Warning | GGW | Daniels | 63 min |
| Aug 27, 9:10 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Sheridan | 65 min |
| Aug 27, 9:52 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt, Sheridan | 53 min |
| Aug 27, 10:40 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt | 20 min |
| Aug 29, 1:45 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon, Stillwater, Yellowstone | 60 min |
| Aug 29, 2:44 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Yellowstone | 61 min |
| Aug 29, 3:41 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Rosebud, Yellowstone | 51 min |
| Aug 29, 3:46 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Treasure, Yellowstone | 28 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Daniels County9
- Big Horn County9
- Valley County8
- Yellowstone County8
- Sheridan County7
- Carter County7
- Roosevelt County6
- Phillips County5
- Powder River County5
- Dawson County4
- Stillwater County4
- Fallon County3
- Wibaux County3
- Prairie County3
- McCone County3
- Rosebud County3
- Broadwater County2
- Hill County2
- Musselshell County2
- Carbon County2
- Richland County2
- Ravalli County1
- Jefferson County1
- Lewis and Clark County1
- Garfield County1
- Custer County1
- Blaine County1
- Cascade County1
- Chouteau County1
- Liberty County1
- Pondera County1
- Teton County1
- Golden Valley County1
- Treasure County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20102012
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.