Alert archive / Montana / Severe Thunderstorm Warnings / 1999
Severe Thunderstorm Warnings in Montana, August 1999
103 severe thunderstorm warnings in August 1999. 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 1999. Tap one for its archive.
- Severe Thunderstorm Warnings
- 103
- Busiest day
- August 15, 199940 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 2, 7:05 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 40 min |
| Aug 2, 7:46 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 29 min |
| Aug 2, 7:57 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 63 min |
| Aug 2, 9:01 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 64 min |
| Aug 2, 9:57 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater | 88 min |
| Aug 3, 3:55 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin, Meagher | 30 min |
| Aug 3, 6:30 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 45 min |
| Aug 6, 4:17 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater | 28 min |
| Aug 7, 3:36 PM MDT | Severe Thunderstorm Warning | MSO | Missoula, Ravalli | 54 min |
| Aug 7, 4:30 PM MDT | Severe Thunderstorm Warning | MSO | Lake, Missoula, Sanders | 60 min |
| Aug 7, 5:20 PM MDT | Severe Thunderstorm Warning | BYZ | Sweet Grass | 35 min |
| Aug 7, 5:27 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton | 63 min |
| Aug 7, 5:35 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 60 min |
| Aug 7, 6:10 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 60 min |
| Aug 7, 6:28 PM MDT | Severe Thunderstorm Warning | TFX | Pondera | 42 min |
| Aug 7, 6:52 PM MDT | Severe Thunderstorm Warning | MSO | Lincoln, Sanders | 38 min |
| Aug 7, 7:16 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 44 min |
| Aug 7, 7:27 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 33 min |
| Aug 7, 7:31 PM MDT | Severe Thunderstorm Warning | TFX | Pondera | 59 min |
| Aug 7, 7:40 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater | 60 min |
| Aug 7, 8:13 PM MDT | Severe Thunderstorm Warning | TFX | Toole | 57 min |
| Aug 7, 9:00 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Toole | 60 min |
| Aug 7, 9:15 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 45 min |
| Aug 7, 9:43 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 62 min |
| Aug 7, 10:00 PM MDT | Severe Thunderstorm Warning | TFX | Hill, Liberty, Toole | 35 min |
| Aug 7, 10:35 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Missoula, Powell | 40 min |
| Aug 8, 12:04 AM MDT | Severe Thunderstorm Warning | TFX | Pondera, Toole | 26 min |
| Aug 8, 12:30 AM MDT | Severe Thunderstorm Warning | TFX | Liberty, Toole | 30 min |
| Aug 8, 6:50 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 60 min |
| Aug 8, 7:48 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 62 min |
| Aug 8, 7:51 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 64 min |
| Aug 11, 4:45 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 60 min |
| Aug 11, 5:01 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 64 min |
| Aug 11, 6:11 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 64 min |
| Aug 11, 8:04 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 61 min |
| Aug 12, 5:46 PM MDT | Severe Thunderstorm Warning | TFX | Teton | 29 min |
| Aug 13, 12:28 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead | 47 min |
| Aug 13, 1:26 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin, Madison | 49 min |
| Aug 13, 2:00 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead | 60 min |
| Aug 13, 2:55 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead, Madison | 50 min |
| Aug 13, 3:40 PM MDT | Severe Thunderstorm Warning | TFX | Gallatin, Madison | 50 min |
| Aug 13, 4:46 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead, Madison | 44 min |
| Aug 13, 4:47 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 63 min |
| Aug 13, 5:17 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 63 min |
| Aug 13, 6:01 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Carbon | 64 min |
| Aug 13, 6:21 PM MDT | Severe Thunderstorm Warning | BYZ | Sweet Grass | 59 min |
| Aug 13, 6:37 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 53 min |
| Aug 13, 7:25 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 65 min |
| Aug 13, 8:09 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 31 min |
| Aug 14, 4:57 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 48 min |
| Aug 14, 5:21 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 39 min |
| Aug 14, 5:38 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 52 min |
| Aug 14, 5:45 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 30 min |
| Aug 14, 5:51 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 69 min |
| Aug 14, 6:17 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 43 min |
| Aug 14, 6:22 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 53 min |
| Aug 14, 6:55 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 50 min |
| Aug 14, 7:00 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 60 min |
| Aug 14, 7:10 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 50 min |
| Aug 14, 7:17 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 28 min |
| Aug 14, 7:55 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 65 min |
| Aug 14, 8:00 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 60 min |
| Aug 14, 8:57 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Petroleum | 63 min |
| Aug 14, 9:54 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 66 min |
| Aug 14, 10:18 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 62 min |
| Aug 14, 10:22 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 38 min |
| Aug 14, 10:42 PM MDT | Severe Thunderstorm Warning | GGW | Petroleum | 63 min |
| Aug 14, 10:57 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 63 min |
| Aug 14, 11:10 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 65 min |
| Aug 14, 11:36 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 54 min |
| Aug 15, 12:04 AM MDT | Severe Thunderstorm Warning | GGW | Dawson | 56 min |
| Aug 15, 12:33 AM MDT | Severe Thunderstorm Warning | GGW | Garfield | 57 min |
| Aug 15, 1:49 AM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater | 61 min |
| Aug 15, 2:38 AM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 62 min |
| Aug 15, 2:59 AM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 66 min |
| Aug 15, 3:18 AM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley | 62 min |
| Aug 15, 3:46 AM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 59 min |
| Aug 15, 4:24 AM MDT | Severe Thunderstorm Warning | GGW | Garfield | 61 min |
| Aug 15, 4:50 AM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 45 min |
| Aug 15, 5:48 AM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 62 min |
| Aug 15, 6:03 AM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 47 min |
| Aug 15, 6:30 AM MDT | Severe Thunderstorm Warning | BYZ | Treasure | 30 min |
| Aug 15, 6:48 AM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 62 min |
| Aug 15, 10:44 AM MDT | Severe Thunderstorm Warning | BYZ | Carbon | 31 min |
| Aug 15, 10:53 AM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 47 min |
| Aug 15, 11:49 AM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 61 min |
| Aug 15, 12:36 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 64 min |
| Aug 15, 12:45 PM MDT | Severe Thunderstorm Warning | BYZ | Treasure | 45 min |
| Aug 15, 12:56 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 59 min |
| Aug 15, 12:57 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 63 min |
| Aug 15, 1:41 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 49 min |
| Aug 15, 1:55 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 60 min |
| Aug 15, 1:56 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 64 min |
| Aug 15, 2:26 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 64 min |
| Aug 20, 6:43 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater | 62 min |
| Aug 21, 2:23 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Powell | 67 min |
| Aug 21, 5:46 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Teton | 34 min |
| Aug 24, 3:19 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 56 min |
| Aug 24, 6:53 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 62 min |
| Aug 24, 7:11 PM MDT | Severe Thunderstorm Warning | TFX | Broadwater, Meagher | 64 min |
| Aug 24, 7:56 PM MDT | Severe Thunderstorm Warning | TFX | Cascade | 64 min |
| Aug 24, 8:12 PM MDT | Severe Thunderstorm Warning | TFX | Meagher | 48 min |
| Aug 27, 11:10 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 65 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Garfield County8
- Fergus County6
- Judith Basin County5
- Golden Valley County5
- Stillwater County5
- Teton County5
- Toole County5
- Big Horn County5
- Petroleum County5
- Missoula County4
- Pondera County4
- Beaverhead County4
- Madison County4
- Musselshell County4
- Rosebud County4
- Wheatland County3
- Meagher County3
- Yellowstone County3
- Liberty County3
- Chouteau County3
- Carter County3
- Custer County3
- Flathead County2
- Broadwater County2
- Ravalli County2
- Sanders County2
- Sweet Grass County2
- Lewis and Clark County2
- Hill County2
- Powell County2
- Richland County2
- Wibaux County2
- Gallatin County2
- Carbon County2
- Treasure County2
- Lake County1
- Lincoln County1
- Sheridan County1
- Valley County1
- McCone County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive19982000
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.