Alert archive / Montana / 2020
Weather alerts in Montana, May 2020
308 weather alerts in May 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in May 2020. Tap one for its archive.
- Alerts
- 308
- Warnings
- 46
- Watches
- 12
- Advisories
- 31
- Busiest day
- May 20, 202084 alerts
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 |
|---|---|---|---|---|
| Apr 30, 6:03 PM MDT | Special Weather Statement | TFX | Madison | 42 min |
| Apr 30, 6:22 PM MDT | Special Weather Statement | TFX | Meagher | 38 min |
| May 1, 12:43 AM MDT | Special Weather Statement | GGW | Roosevelt | 47 min |
| May 1, 2:56 AM MDT | Lake Wind Advisory | GGW | Garfield, McCone, Petroleum, Phillips, Valley | 18 hr |
| May 1, 8:02 AM MDT | River Flood Advisory | MSO | Missoula | 49 hr |
| May 2, 7:26 PM MDT | High Wind Watch | TFX | 8 hr | |
| May 2, 8:34 PM MDT | Special Weather Statement | BYZ | Big Horn | 26 min |
| May 2, 9:09 PM MDT | Special Weather Statement | BYZ | Big Horn | 36 min |
| May 2, 9:43 PM MDT | Special Weather Statement | BYZ | Big Horn | 47 min |
| May 3, 3:12 AM MDT | Lake Wind Advisory | GGW | Garfield, McCone, Petroleum, Phillips, Valley | 18 hr |
| May 3, 12:09 PM MDT | Special Weather Statement | BYZ | Sweet Grass, Wheatland | 51 min |
| May 3, 12:15 PM MDT | Special Weather Statement | TFX | Judith Basin | 60 min |
| May 3, 12:31 PM MDT | Special Weather Statement | TFX | Blaine | 59 min |
| May 3, 12:59 PM MDT | Special Weather Statement | GGW | Garfield | 61 min |
| May 3, 1:00 PM MDT | Special Weather Statement | BYZ | Golden Valley, Sweet Grass | 45 min |
| May 3, 1:17 PM MDT | Special Weather Statement | TFX | Fergus | 28 min |
| May 3, 1:21 PM MDT | Special Weather Statement | TFX | Gallatin | 54 min |
| May 3, 1:44 PM MDT | Special Weather Statement | GGW | Phillips | 61 min |
| May 3, 1:47 PM MDT | Special Weather Statement | GGW | Dawson, McCone, Prairie | 58 min |
| May 3, 1:56 PM MDT | Special Weather Statement | TFX | Fergus | 34 min |
| May 3, 2:00 PM MDT | Special Weather Statement | GGW | 60 min | |
| May 3, 2:10 PM MDT | Mesoscale Discussion | SPC | Carter, Custer, Dawson, Fallon, Fergus, Garfield and 11 more | 2 hr |
| May 3, 2:12 PM MDT | Special Weather Statement | BYZ | Musselshell | 63 min |
| May 3, 2:26 PM MDT | Special Weather Statement | BYZ | Custer | 49 min |
| May 3, 2:29 PM MDT | Special Weather Statement | GGW | Petroleum | 61 min |
| May 3, 3:04 PM MDT | Special Weather Statement | BYZ | Yellowstone | 56 min |
| May 3, 3:36 PM MDT | Special Weather Statement | BYZ | Carter | 24 min |
| May 3, 3:38 PM MDT | Special Weather Statement | BYZ | Treasure | 82 min |
| May 3, 3:39 PM MDT | Special Weather Statement | GGW | McCone | 66 min |
| May 3, 3:48 PM MDT | Special Weather Statement | GGW | Garfield | 57 min |
| May 3, 3:55 PM MDT | Special Weather Statement | GGW | Garfield | 65 min |
| May 3, 4:01 PM MDT | Special Weather Statement | BYZ | Carter | 29 min |
| May 3, 4:03 PM MDT | Special Weather Statement | BYZ | Treasure | 42 min |
| May 3, 4:16 PM MDT | Special Weather Statement | GGW | Valley | 59 min |
| May 3, 4:26 PM MDT | Special Weather Statement | BYZ | Carter | 34 min |
| May 3, 4:30 PM MDT | Special Weather Statement | GGW | Garfield | 75 min |
| May 3, 4:32 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 58 min |
| May 3, 4:49 PM MDT | Areal Flood Advisory | GGW | McCone | 3 hr |
| May 3, 4:55 PM MDT | Special Weather Statement | GGW | McCone | 80 min |
| May 3, 5:01 PM MDT | Special Weather Statement | GGW | Valley | 59 min |
| May 3, 5:19 PM MDT | Special Weather Statement | BYZ | Custer | 71 min |
| May 3, 5:23 PM MDT | Special Weather Statement | GGW | Wibaux | 67 min |
| May 3, 5:26 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 64 min |
| May 3, 5:41 PM MDT | Special Weather Statement | GGW | Prairie | 64 min |
| May 3, 5:43 PM MDT | Special Weather Statement | GGW | Dawson, Richland | 92 min |
| May 3, 6:04 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 22 min |
| May 3, 6:28 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 62 min |
| May 3, 6:30 PM MDT | Special Weather Statement | BYZ | Custer, Powder River | 60 min |
| May 3, 6:56 PM MDT | Special Weather Statement | BYZ | Fallon | 64 min |
| May 3, 6:58 PM MDT | Special Weather Statement | GGW | Dawson, Wibaux | 77 min |
| May 3, 7:30 PM MDT | Special Weather Statement | BYZ | Carter | 45 min |
| May 5, 2:05 PM MDT | Wind Advisory | MSO | Deer Lodge, Flathead, Granite, Lake, Missoula, Powell and 3 more | 31 hr |
| May 5, 2:05 PM MDT | Winter Weather Advisory | MSO | Flathead, Lake | 43 hr |
| May 5, 2:45 PM MDT | High Wind Watch | BYZ | Big Horn, Carbon, Golden Valley, Musselshell, Park, Rosebud and 5 more | 20 hr |
| May 5, 3:14 PM MDT | Winter Weather Advisory | TFX | 45 hr | |
| May 6, 3:01 AM MDT | Lake Wind Advisory | GGW | Garfield, McCone, Petroleum, Phillips, Valley | 20 hr |
| May 6, 3:46 AM MDT | High Wind Warning | BYZ | Big Horn, Carbon, Golden Valley, Musselshell, Park, Rosebud and 5 more | 35 hr |
| May 6, 3:46 AM MDT | Wind Advisory | BYZ | Park, Stillwater, Sweet Grass | 32 hr |
| May 6, 3:59 PM MDT | Special Weather Statement | TFX | Madison | 61 min |
| May 6, 4:04 PM MDT | Special Weather Statement | TFX | Cascade | 41 min |
| May 6, 4:58 PM MDT | Special Weather Statement | TFX | Cascade | 62 min |
| May 7, 12:17 AM MDT | Special Weather Statement | TFX | Fergus, Judith Basin | 3 hr |
| May 7, 3:28 AM MDT | Winter Weather Advisory | BYZ | Big Horn, Carbon | 11 hr |
| May 7, 3:46 AM MDT | Special Weather Statement | TFX | Fergus, Judith Basin | 2 hr |
| May 8, 1:40 PM MDT | Special Weather Statement | TFX | Cascade | 80 min |
| May 8, 2:55 PM MDT | Special Weather Statement | TFX | Cascade | 80 min |
| May 8, 3:02 PM MDT | Special Weather Statement | TFX | Hill | 43 min |
| May 8, 4:43 PM MDT | Lake Wind Advisory | GGW | Garfield, McCone, Petroleum, Phillips, Valley | 13 hr |
| May 9, 3:02 PM MDT | Special Weather Statement | GGW | McCone | 43 min |
| May 11, 2:51 AM MDT | Winter Weather Advisory | TFX | 33 hr | |
| May 11, 4:05 AM MDT | Winter Weather Advisory | MSO | Flathead, Lake | 31 hr |
| May 11, 2:38 PM MDT | Lake Wind Advisory | GGW | Garfield, McCone, Petroleum, Phillips, Valley | 29 hr |
| May 12, 7:16 AM MDT | Special Weather Statement | TFX | Fergus, Teton | 59 min |
| May 12, 1:32 PM MDT | Special Weather Statement | TFX | Cascade | 118 min |
| May 13, 1:20 PM MDT | Special Weather Statement | TFX | Chouteau | 40 min |
| May 13, 1:57 PM MDT | Special Weather Statement | GGW | Petroleum | 63 min |
| May 15, 8:37 AM MDT | Winter Weather Advisory | MSO | Deer Lodge, Granite, Missoula, Powell, Ravalli, Silver Bow | 3 hr |
| May 15, 8:57 AM MDT | Winter Weather Advisory | TFX | 3 hr | |
| May 15, 11:59 AM MDT | Special Weather Statement | TFX | Jefferson | 61 min |
| May 15, 1:07 PM MDT | Special Weather Statement | TFX | Jefferson | 38 min |
| May 15, 2:39 PM MDT | Special Weather Statement | TFX | Jefferson | 51 min |
| May 15, 4:00 PM MDT | Special Weather Statement | TFX | Jefferson | 3 hr |
| May 15, 7:23 PM MDT | Special Weather Statement | TFX | Jefferson | 112 min |
| May 16, 2:36 PM MDT | Lake Wind Advisory | GGW | Garfield, McCone, Petroleum, Phillips, Valley | 29 hr |
| May 17, 7:02 PM MDT | Special Weather Statement | MSO | Sanders | 28 min |
| May 17, 8:52 PM MDT | Special Weather Statement | MSO | Lake | 53 min |
| May 18, 12:11 PM MDT | River Flood Watch | MSO | Missoula | 24 hr |
| May 18, 4:26 PM MDT | Special Weather Statement | TFX | Judith Basin | 49 min |
| May 18, 5:23 PM MDT | Mesoscale Discussion | SPC | Cascade, Granite, Lewis and Clark, Pondera, Powell, Teton | 2 hr |
| May 18, 5:51 PM MDT | Special Weather Statement | TFX | Judith Basin | 24 min |
| May 18, 6:11 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 49 min |
| May 18, 6:31 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 44 min |
| May 18, 6:34 PM MDT | Special Weather Statement | TFX | Fergus | 26 min |
| May 18, 6:36 PM MDT | Special Weather Statement | TFX | Chouteau | 24 min |
| May 18, 6:48 PM MDT | Special Weather Statement | TFX | Judith Basin | 27 min |
| May 18, 6:50 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 25 min |
| May 18, 6:54 PM MDT | Special Weather Statement | TFX | Fergus | 36 min |
| May 18, 7:02 PM MDT | Special Weather Statement | TFX | Fergus | 43 min |
| May 18, 7:12 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark | 33 min |
| May 18, 7:22 PM MDT | Special Weather Statement | TFX | Teton | 38 min |
| May 18, 7:29 PM MDT | Special Weather Statement | TFX | Fergus | 31 min |
| May 18, 7:37 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark, Teton | 23 min |
| May 18, 7:53 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Teton | 26 min |
| May 18, 8:02 PM MDT | Special Weather Statement | TFX | Teton | 28 min |
| May 18, 8:16 PM MDT | Special Weather Statement | TFX | 29 min | |
| May 18, 8:18 PM MDT | Special Weather Statement | TFX | Judith Basin | 27 min |
| May 18, 8:34 PM MDT | Special Weather Statement | TFX | 41 min | |
| May 18, 8:46 PM MDT | Special Weather Statement | TFX | Fergus | 29 min |
| May 18, 8:47 PM MDT | Special Weather Statement | TFX | Chouteau | 43 min |
| May 18, 9:03 PM MDT | Special Weather Statement | TFX | Cascade | 27 min |
| May 18, 9:27 PM MDT | Special Weather Statement | TFX | 48 min | |
| May 18, 9:37 PM MDT | Special Weather Statement | TFX | Hill | 38 min |
| May 18, 10:16 PM MDT | Special Weather Statement | TFX | Meagher | 29 min |
| May 18, 10:22 PM MDT | Special Weather Statement | TFX | Cascade | 38 min |
| May 18, 10:37 PM MDT | Special Weather Statement | TFX | Beaverhead, Gallatin, Madison | 38 min |
| May 18, 10:45 PM MDT | Special Weather Statement | TFX | Judith Basin | 45 min |
| May 18, 11:19 PM MDT | Special Weather Statement | TFX | Deer Lodge | 26 min |
| May 18, 11:29 PM MDT | Special Weather Statement | TFX | Judith Basin | 46 min |
| May 18, 11:44 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus, Judith Basin | 46 min |
| May 19, 12:38 AM MDT | Special Weather Statement | TFX | Blaine | 37 min |
| May 19, 11:02 AM MDT | Flood Watch | MSO | Granite, Missoula, Ravalli | 24 hr |
| May 19, 11:32 AM MDT | River Flood Warning | MSO | Missoula | 15 days |
| May 19, 12:03 PM MDT | River Flood Watch | MSO | Ravalli | 3 days |
| May 19, 12:03 PM MDT | River Flood Watch | MSO | Missoula | 50 hr |
| May 19, 12:03 PM MDT | River Flood Watch | MSO | Ravalli | 67 hr |
| May 19, 1:36 PM MDT | Mesoscale Discussion | SPC | Beaverhead, Blaine, Broadwater, Cascade, Chouteau, Deer Lodge and 15 more | 114 min |
| May 19, 1:57 PM MDT | Special Weather Statement | TFX | Ravalli | 18 min |
| May 19, 2:31 PM MDT | Special Weather Statement | TFX | Broadwater | 29 min |
| May 19, 2:34 PM MDT | Severe Thunderstorm Watch | SPC | Beaverhead, Blaine, Broadwater, Cascade, Chouteau, Deer Lodge and 21 more | 7 hr |
| May 19, 2:50 PM MDT | Special Weather Statement | TFX | Silver Bow | 40 min |
| May 19, 2:58 PM MDT | Special Weather Statement | TFX | Meagher | 47 min |
| May 19, 3:57 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 33 min |
| May 19, 4:06 PM MDT | Special Weather Statement | TFX | Judith Basin | 24 min |
| May 19, 4:28 PM MDT | Special Weather Statement | TFX | Judith Basin | 47 min |
| May 19, 4:33 PM MDT | Special Weather Statement | MSO | Powell | 42 min |
| May 19, 4:39 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin | 36 min |
| May 19, 4:41 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 34 min |
| May 19, 5:10 PM MDT | Mesoscale Discussion | SPC | Broadwater, Cascade, Fergus, Gallatin, Jefferson, Judith Basin and 5 more | 2 hr |
| May 19, 5:15 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 30 min |
| May 19, 5:21 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 24 min |
| May 19, 5:38 PM MDT | Special Weather Statement | BYZ | Sweet Grass | 52 min |
| May 19, 5:57 PM MDT | Special Weather Statement | TFX | Fergus | 33 min |
| May 19, 6:02 PM MDT | Special Weather Statement | TFX | Cascade | 28 min |
| May 19, 6:14 PM MDT | Special Weather Statement | TFX | Meagher | 31 min |
| May 19, 6:30 PM MDT | Special Weather Statement | TFX | 30 min | |
| May 19, 6:35 PM MDT | Special Weather Statement | MSO | Silver Bow | 25 min |
| May 19, 6:44 PM MDT | Special Weather Statement | BYZ | Wheatland | 46 min |
| May 19, 6:45 PM MDT | Special Weather Statement | BYZ | Wheatland | 30 min |
| May 19, 6:47 PM MDT | Special Weather Statement | TFX | Wheatland | 43 min |
| May 19, 7:01 PM MDT | Special Weather Statement | TFX | 44 min | |
| May 19, 7:24 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 66 min |
| May 19, 7:25 PM MDT | Special Weather Statement | TFX | Wheatland | 50 min |
| May 19, 7:43 PM MDT | Special Weather Statement | TFX | 32 min | |
| May 19, 7:54 PM MDT | Special Weather Statement | TFX | Fergus | 36 min |
| May 19, 8:01 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley | 59 min |
| May 19, 8:04 PM MDT | Special Weather Statement | TFX | 41 min | |
| May 19, 8:08 PM MDT | Special Weather Statement | TFX | Fergus | 52 min |
| May 19, 8:19 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 26 min |
| May 19, 8:46 PM MDT | Special Weather Statement | BYZ | Sweet Grass | 29 min |
| May 19, 8:47 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 28 min |
| May 19, 8:53 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 37 min |
| May 19, 8:55 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 35 min |
| May 19, 8:59 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 61 min |
| May 19, 9:03 PM MDT | Special Weather Statement | TFX | Silver Bow | 27 min |
| May 19, 9:06 PM MDT | Special Weather Statement | TFX | Meagher | 24 min |
| May 19, 9:25 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 35 min |
| May 19, 9:52 PM MDT | Special Weather Statement | TFX | Petroleum | 23 min |
| May 19, 9:54 PM MDT | Special Weather Statement | TFX | Meagher | 36 min |
| May 19, 9:56 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 34 min |
| May 19, 10:29 PM MDT | Special Weather Statement | TFX | Deer Lodge | 46 min |
| May 19, 10:31 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 29 min |
| May 19, 11:26 PM MDT | Special Weather Statement | TFX | Jefferson | 34 min |
| May 19, 11:28 PM MDT | Special Weather Statement | TFX | Silver Bow | 32 min |
| May 19, 11:29 PM MDT | Special Weather Statement | MSO | Deer Lodge | 46 min |
| May 19, 11:39 PM MDT | Special Weather Statement | MSO | Silver Bow | 66 min |
| May 19, 11:41 PM MDT | Special Weather Statement | BYZ | Stillwater, Sweet Grass | 49 min |
| May 19, 11:53 PM MDT | Special Weather Statement | TFX | Broadwater | 37 min |
| May 20, 12:20 AM MDT | Special Weather Statement | TFX | Lewis and Clark | 25 min |
| May 20, 12:29 AM MDT | Special Weather Statement | BYZ | Golden Valley | 46 min |
| May 20, 12:41 AM MDT | Special Weather Statement | TFX | Lewis and Clark | 34 min |
| May 20, 12:55 AM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Musselshell | 50 min |
| May 20, 12:59 AM MDT | Special Weather Statement | TFX | Lewis and Clark | 31 min |
| May 20, 1:17 AM MDT | Special Weather Statement | TFX | Lewis and Clark | 28 min |
| May 20, 1:25 AM MDT | Special Weather Statement | TFX | Cascade | 35 min |
| May 20, 1:41 AM MDT | Special Weather Statement | TFX | Lewis and Clark | 34 min |
| May 20, 1:44 AM MDT | Special Weather Statement | TFX | Cascade | 31 min |
| May 20, 1:45 AM MDT | Special Weather Statement | BYZ | Musselshell | 45 min |
| May 20, 2:00 AM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Pondera, Teton | 45 min |
| May 20, 2:03 AM MDT | Special Weather Statement | GGW | Petroleum | 27 min |
| May 20, 2:06 AM MDT | Special Weather Statement | TFX | Petroleum | 24 min |
| May 20, 2:11 AM MDT | Special Weather Statement | TFX | Lewis and Clark | 34 min |
| May 20, 2:26 AM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 49 min |
| May 20, 2:40 AM MDT | Special Weather Statement | TFX | Liberty | 35 min |
| May 20, 2:44 AM MDT | Special Weather Statement | TFX | Teton | 46 min |
| May 20, 3:05 AM MDT | Special Weather Statement | GGW | Petroleum | 55 min |
| May 20, 3:24 AM MDT | Special Weather Statement | TFX | Pondera | 36 min |
| May 20, 3:50 AM MDT | High Wind Watch | TFX | 18 hr | |
| May 20, 4:33 AM MDT | Special Weather Statement | TFX | Lewis and Clark | 42 min |
| May 20, 5:09 AM MDT | Special Weather Statement | TFX | Lewis and Clark | 51 min |
| May 20, 7:48 AM MDT | Special Weather Statement | TFX | Pondera | 42 min |
| May 20, 11:00 AM MDT | Special Weather Statement | GGW | Phillips | 60 min |
| May 20, 11:15 AM MDT | Areal Flood Advisory | MSO | Missoula, Ravalli | 25 hr |
| May 20, 11:42 AM MDT | Special Weather Statement | TFX | Liberty | 48 min |
| May 20, 11:55 AM MDT | River Flood Advisory | MSO | Ravalli | 23 hr |
| May 20, 11:55 AM MDT | River Flood Advisory | MSO | Ravalli | 23 hr |
| May 20, 12:35 PM MDT | Special Weather Statement | TFX | Liberty | 25 min |
| May 20, 1:43 PM MDT | Mesoscale Discussion | SPC | Big Horn, Blaine, Carter, Custer, Daniels, Dawson and 18 more | 92 min |
| May 20, 1:53 PM MDT | Special Weather Statement | TFX | Judith Basin | 22 min |
| May 20, 2:30 PM MDT | Special Weather Statement | TFX | Chouteau | 45 min |
| May 20, 2:57 PM MDT | Special Weather Statement | TFX | Chouteau | 48 min |
| May 20, 3:11 PM MDT | Severe Thunderstorm Watch | SPC | Big Horn, Blaine, Carbon, Carter, Custer, Daniels and 21 more | 8 hr |
| May 20, 3:57 PM MDT | Special Weather Statement | BYZ | Wheatland | 48 min |
| May 20, 4:02 PM MDT | Special Weather Statement | TFX | Fergus | 43 min |
| May 20, 4:21 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 24 min |
| May 20, 4:40 PM MDT | Special Weather Statement | TFX | Fergus | 50 min |
| May 20, 4:42 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 48 min |
| May 20, 4:47 PM MDT | Special Weather Statement | BYZ | Golden Valley | 43 min |
| May 20, 4:48 PM MDT | Special Weather Statement | BYZ | Big Horn | 42 min |
| May 20, 5:00 PM MDT | Special Weather Statement | TFX | Fergus | 30 min |
| May 20, 5:13 PM MDT | Special Weather Statement | BYZ | Carter | 32 min |
| May 20, 5:23 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 67 min |
| May 20, 5:26 PM MDT | Special Weather Statement | TFX | Fergus | 34 min |
| May 20, 5:29 PM MDT | Special Weather Statement | BYZ | Musselshell | 46 min |
| May 20, 5:36 PM MDT | Special Weather Statement | BYZ | Rosebud | 24 min |
| May 20, 5:44 PM MDT | Special Weather Statement | BYZ | Carter | 46 min |
| May 20, 5:54 PM MDT | Special Weather Statement | GGW | Petroleum | 66 min |
| May 20, 6:23 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 52 min |
| May 20, 6:27 PM MDT | Mesoscale Discussion | SPC | Big Horn, Blaine, Carbon, Carter, Custer, Daniels and 19 more | 93 min |
| May 20, 6:30 PM MDT | Special Weather Statement | BYZ | Carter | 45 min |
| May 20, 6:35 PM MDT | Special Weather Statement | BYZ | Rosebud | 40 min |
| May 20, 6:54 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 36 min |
| May 20, 6:55 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 30 min |
| May 20, 7:24 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Fallon, Rosebud | 48 min |
| May 20, 7:28 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Garfield, McCone, Prairie | 62 min |
| May 20, 7:35 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum, Phillips | 55 min |
| May 20, 8:18 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Prairie, Valley | 57 min |
| May 20, 8:36 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland, Roosevelt, Wibaux | 39 min |
| May 20, 8:44 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Garfield, McCone, Phillips, Richland, Roosevelt and 1 more | 76 min |
| May 20, 9:10 PM MDT | Mesoscale Discussion | SPC | Daniels, Phillips, Roosevelt, Valley | 95 min |
| May 20, 9:17 PM MDT | Tornado Warning | GGW | Valley | 13 min |
| May 20, 9:33 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Phillips, Roosevelt, Valley | 57 min |
| May 20, 9:35 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Sheridan | 55 min |
| May 20, 9:35 PM MDT | Areal Flood Advisory | TFX | Cascade, Lewis and Clark | 35 hr |
| May 20, 9:41 PM MDT | High Wind Warning | TFX | 22 hr | |
| May 20, 10:02 PM MDT | Areal Flood Advisory | GGW | Garfield, Valley | 3 hr |
| May 20, 10:21 PM MDT | Special Weather Statement | GGW | Roosevelt | 54 min |
| May 20, 10:33 PM MDT | Special Weather Statement | GGW | 57 min | |
| May 20, 10:35 PM MDT | Special Weather Statement | TFX | Blaine | 40 min |
| May 20, 10:54 PM MDT | Special Weather Statement | GGW | Daniels | 66 min |
| May 20, 11:09 PM MDT | Special Weather Statement | GGW | Phillips, Valley | 81 min |
| May 20, 11:26 PM MDT | Lake Wind Advisory | MSO | Flathead, Lake, Sanders | 19 hr |
| May 21, 1:41 AM MDT | Winter Weather Advisory | TFX | 27 hr | |
| May 21, 9:14 AM MDT | Areal Flood Advisory | TFX | Lewis and Clark | 23 hr |
| May 21, 9:41 AM MDT | Areal Flood Advisory | TFX | Lewis and Clark | 23 hr |
| May 21, 1:41 PM MDT | River Flood Advisory | MSO | Missoula | 45 hr |
| May 21, 3:04 PM MDT | Special Weather Statement | GGW | Valley | 26 min |
| May 21, 3:36 PM MDT | Special Weather Statement | GGW | Valley | 39 min |
| May 21, 3:51 PM MDT | Special Weather Statement | GGW | Daniels | 39 min |
| May 22, 5:06 AM MDT | Winter Weather Advisory | TFX | 31 hr | |
| May 22, 1:32 PM MDT | Winter Weather Advisory | BYZ | Carbon, Park, Stillwater, Sweet Grass | 46 hr |
| May 23, 8:14 AM MDT | Special Weather Statement | TFX | Gallatin | 91 min |
| May 23, 9:38 AM MDT | Special Weather Statement | TFX | Gallatin | 82 min |
| May 23, 5:27 PM MDT | Mesoscale Discussion | SPC | Carter | 93 min |
| May 29, 2:12 PM MDT | Mesoscale Discussion | SPC | Beaverhead, Madison | 2 hr |
| May 29, 2:23 PM MDT | Lake Wind Advisory | GGW | Garfield, McCone, Petroleum, Phillips, Valley | 54 hr |
| May 29, 5:28 PM MDT | Special Weather Statement | TFX | Madison | 32 min |
| May 29, 6:05 PM MDT | Special Weather Statement | TFX | Madison | 55 min |
| May 29, 7:18 PM MDT | Special Weather Statement | TFX | Gallatin | 42 min |
| May 29, 7:44 PM MDT | Special Weather Statement | BYZ | Park | 46 min |
| May 29, 8:48 PM MDT | Special Weather Statement | TFX | 42 min | |
| May 30, 1:45 PM MDT | Mesoscale Discussion | SPC | Carbon, Gallatin, Madison, Park | 90 min |
| May 30, 3:13 PM MDT | Special Weather Statement | TFX | 32 min | |
| May 30, 3:46 PM MDT | Special Weather Statement | MSO | Powell | 29 min |
| May 30, 4:20 PM MDT | Special Weather Statement | MSO | Powell | 25 min |
| May 30, 4:47 PM MDT | Special Weather Statement | MSO | Powell | 28 min |
| May 30, 5:00 PM MDT | Mesoscale Discussion | SPC | Broadwater, Cascade, Granite, Jefferson, Lewis and Clark, Meagher and 3 more | 90 min |
| May 30, 5:08 PM MDT | Special Weather Statement | TFX | Gallatin | 37 min |
| May 30, 5:16 PM MDT | Special Weather Statement | MSO | Missoula | 44 min |
| May 30, 5:29 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 31 min |
| May 30, 6:15 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 30 min |
| May 30, 8:12 PM MDT | Special Weather Statement | MSO | 33 min | |
| May 30, 9:06 PM MDT | Mesoscale Discussion | SPC | Mineral, Sanders | 114 min |
| May 30, 9:56 PM MDT | Special Weather Statement | MSO | Sanders | 34 min |
| May 30, 10:28 PM MDT | Special Weather Statement | MSO | Mineral, Sanders | 47 min |
| May 30, 11:11 PM MDT | Special Weather Statement | MSO | Lincoln, Sanders | 49 min |
| May 30, 11:51 PM MDT | Special Weather Statement | MSO | Sanders | 39 min |
| May 31, 1:22 AM MDT | Areal Flood Advisory | TFX | Glacier, Pondera | 36 hr |
| May 31, 4:22 AM MDT | Special Weather Statement | MSO | 53 min | |
| May 31, 6:16 AM MDT | River Flood Warning | BYZ | Carbon | 21 days |
| May 31, 6:33 AM MDT | Special Weather Statement | MSO | Mineral, Missoula, Ravalli | 57 min |
| May 31, 6:56 AM MDT | Special Weather Statement | MSO | Ravalli | 34 min |
| May 31, 7:12 AM MDT | Special Weather Statement | MSO | Lake, Missoula, Sanders | 33 min |
| May 31, 7:55 AM MDT | Special Weather Statement | MSO | Flathead | 35 min |
| May 31, 8:14 AM MDT | Severe Thunderstorm Warning | MSO | Flathead, Lake, Lincoln | 31 min |
| May 31, 8:41 AM MDT | Severe Thunderstorm Warning | MSO | Flathead, Lincoln | 34 min |
| May 31, 8:48 AM MDT | Special Weather Statement | TFX | Glacier | 42 min |
| May 31, 9:05 AM MDT | High Wind Warning | TFX | 9 hr | |
| May 31, 9:31 AM MDT | Special Weather Statement | TFX | Teton | 29 min |
| May 31, 2:29 PM MDT | Mesoscale Discussion | SPC | Blaine, Daniels, Phillips, Valley | 2 hr |
| May 31, 2:35 PM MDT | Mesoscale Discussion | SPC | Big Horn, Carter, Custer, Dawson, Fallon, Powder River and 4 more | 115 min |
| May 31, 2:49 PM MDT | Special Weather Statement | GGW | Phillips | 41 min |
| May 31, 3:46 PM MDT | Special Weather Statement | GGW | Phillips | 44 min |
| May 31, 4:07 PM MDT | Severe Thunderstorm Watch | SPC | Carter, Custer, Dawson, Fallon, Powder River, Prairie and 1 more | 6 hr |
| May 31, 4:52 PM MDT | Special Weather Statement | BYZ | Rosebud | 23 min |
| May 31, 5:10 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 65 min |
| May 31, 5:11 PM MDT | River Flood Warning | MSO | Flathead | 41 hr |
| May 31, 5:23 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 53 min |
| May 31, 5:41 PM MDT | River Flood Watch | MSO | Flathead | 24 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 39 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 14 |
| Special Weather Statement | 205 |
| Flooding | |
| River Flood Warning | 3 |
| Flood Watch | 1 |
| River Flood Watch | 5 |
| Areal Flood Advisory | 7 |
| River Flood Advisory | 4 |
| Winter | |
| Winter Weather Advisory | 10 |
| Wind and dust | |
| High Wind Warning | 3 |
| High Wind Watch | 3 |
| Lake Wind Advisory | 8 |
| Wind Advisory | 2 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Fergus County29
- Lewis and Clark County29
- Valley County22
- Cascade County21
- Garfield County20
- McCone County20
- Petroleum County20
- Phillips County20
- Judith Basin County19
- Carter County17
- Custer County16
- Missoula County15
- Wheatland County13
- Ravalli County13
- Golden Valley County12
- Dawson County12
- Prairie County12
- Rosebud County12
- Teton County12
- Big Horn County11
- Musselshell County11
- Powell County11
- Meagher County10
- Roosevelt County10
- Sweet Grass County10
- Gallatin County10
- Wibaux County10
- Silver Bow County10
- Jefferson County10
- Madison County9
- Blaine County9
- Treasure County9
- Flathead County9
- Sanders County9
- Chouteau County9
- Daniels County9
- Fallon County8
- Carbon County8
- Powder River County7
- Richland County7
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.