Alert archive / Montana / Severe Thunderstorm Warnings / 2009
Severe Thunderstorm Warnings in Montana, August 2009
85 severe thunderstorm warnings in August 2009. 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 2009. Tap one for its archive.
- Severe Thunderstorm Warnings
- 85
- Busiest day
- August 6, 200915 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 4, 3:27 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 63 min |
| Aug 4, 3:56 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 64 min |
| Aug 4, 4:39 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Powder River | 36 min |
| Aug 4, 6:44 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater, Yellowstone | 31 min |
| Aug 4, 7:16 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 29 min |
| Aug 5, 8:31 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Lincoln | 44 min |
| Aug 6, 1:04 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead | 41 min |
| Aug 6, 1:46 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead | 44 min |
| Aug 6, 1:54 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Silver Bow | 51 min |
| Aug 6, 2:41 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Silver Bow | 49 min |
| Aug 6, 2:50 PM MDT | Severe Thunderstorm Warning | TFX | Jefferson, Lewis and Clark | 55 min |
| Aug 6, 4:06 PM MDT | Severe Thunderstorm Warning | BYZ | Sweet Grass | 54 min |
| Aug 6, 4:19 PM MDT | Severe Thunderstorm Warning | MSO | Silver Bow | 36 min |
| Aug 6, 4:32 PM MDT | Severe Thunderstorm Warning | TFX | Meagher | 43 min |
| Aug 6, 5:00 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater, Sweet Grass | 60 min |
| Aug 6, 5:02 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin, Meagher | 43 min |
| Aug 6, 5:12 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 48 min |
| Aug 6, 5:19 PM MDT | Severe Thunderstorm Warning | TFX | Meagher | 41 min |
| Aug 6, 5:30 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin, Meagher | 60 min |
| Aug 6, 5:59 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 61 min |
| Aug 6, 6:01 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 44 min |
| Aug 6, 6:04 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Gallatin | 41 min |
| Aug 6, 6:41 PM MDT | Severe Thunderstorm Warning | TFX | Meagher | 28 min |
| Aug 6, 6:44 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 48 min |
| Aug 6, 6:55 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 65 min |
| Aug 6, 7:34 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 56 min |
| Aug 6, 7:57 PM MDT | Severe Thunderstorm Warning | GGW | Phillips | 49 min |
| Aug 7, 7:02 AM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Teton | 18 min |
| Aug 7, 4:27 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 63 min |
| Aug 7, 5:00 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 30 min |
| Aug 7, 5:26 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 64 min |
| Aug 7, 5:35 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 55 min |
| Aug 7, 5:47 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 58 min |
| Aug 7, 6:15 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 60 min |
| Aug 7, 6:30 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River, Rosebud | 60 min |
| Aug 7, 6:43 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River, Rosebud | 62 min |
| Aug 7, 6:44 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 46 min |
| Aug 7, 7:16 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 42 min |
| Aug 7, 7:23 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 52 min |
| Aug 7, 7:32 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 20 min |
| Aug 7, 7:41 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Custer, Powder River | 34 min |
| Aug 7, 7:46 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 13 min |
| Aug 7, 8:05 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Custer, Fallon | 55 min |
| Aug 7, 8:45 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Fallon | 45 min |
| Aug 7, 8:46 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie, Wibaux | 37 min |
| Aug 7, 8:50 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 55 min |
| Aug 8, 5:01 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 48 min |
| Aug 13, 2:54 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 21 min |
| Aug 13, 6:21 PM MDT | Severe Thunderstorm Warning | BYZ | Sweet Grass, Wheatland | 53 min |
| Aug 13, 8:20 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 53 min |
| Aug 13, 10:51 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie, Wibaux | 54 min |
| Aug 13, 11:47 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie, Richland, Wibaux | 58 min |
| Aug 14, 12:44 AM MDT | Severe Thunderstorm Warning | GGW | Richland | 32 min |
| Aug 14, 1:50 AM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt | 40 min |
| Aug 14, 2:32 AM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland | 28 min |
| Aug 14, 2:30 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin | 18 min |
| Aug 14, 2:32 PM MDT | Severe Thunderstorm Warning | BYZ | Park | 52 min |
| Aug 14, 2:47 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 50 min |
| Aug 14, 7:05 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 55 min |
| Aug 14, 7:15 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 53 min |
| Aug 14, 7:27 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 52 min |
| Aug 14, 7:51 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 54 min |
| Aug 14, 7:59 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 61 min |
| Aug 14, 8:49 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 56 min |
| Aug 14, 9:08 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 51 min |
| Aug 14, 9:44 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland | 61 min |
| Aug 14, 10:44 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland | 61 min |
| Aug 14, 10:46 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie | 49 min |
| Aug 14, 11:46 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland | 59 min |
| Aug 21, 6:31 PM MDT | Severe Thunderstorm Warning | MSO | Powell | 22 min |
| Aug 21, 6:37 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 38 min |
| Aug 21, 7:04 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Powell | 41 min |
| Aug 21, 7:38 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Powell | 37 min |
| Aug 21, 8:10 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Powell | 50 min |
| Aug 22, 8:33 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 25 min |
| Aug 23, 7:40 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 65 min |
| Aug 23, 8:02 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland | 58 min |
| Aug 23, 8:30 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Roosevelt, Valley | 60 min |
| Aug 23, 8:59 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland, Roosevelt | 61 min |
| Aug 23, 9:28 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Valley | 30 min |
| Aug 23, 9:34 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland | 56 min |
| Aug 23, 9:46 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt | 59 min |
| Aug 23, 10:32 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland, Roosevelt | 41 min |
| Aug 23, 10:42 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 33 min |
| Aug 23, 11:15 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 45 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Richland County14
- Dawson County12
- Big Horn County10
- McCone County9
- Rosebud County7
- Powder River County6
- Roosevelt County6
- Meagher County5
- Carter County5
- Yellowstone County4
- Musselshell County4
- Prairie County4
- Garfield County4
- Powell County4
- Stillwater County3
- Silver Bow County3
- Sweet Grass County3
- Judith Basin County3
- Fergus County3
- Gallatin County3
- Custer County3
- Wibaux County3
- Wheatland County3
- Granite County3
- Beaverhead County2
- Deer Lodge County2
- Lewis and Clark County2
- Cascade County2
- Phillips County2
- Fallon County2
- Valley County2
- Flathead County1
- Lincoln County1
- Jefferson County1
- Broadwater County1
- Petroleum County1
- Chouteau County1
- Teton County1
- Ravalli County1
- Park County1
1 more counties
Nearby
Alerts in force nowTornadoes on recordThe radar archive20082010
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.