Alert archive / Minnesota / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Minnesota, 2009
182 severe thunderstorm warnings in 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 2009. Tap one for its archive.
- Severe Thunderstorm Warnings
- 182
- Busiest month
- July70 severe thunderstorm warnings
- Busiest day
- July 24, 200919 severe thunderstorm warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
106 of 187 severe thunderstorm warnings covering Minnesota in 2009 had a qualifying storm report inside them; 167 of 231 hail, wind and damage reports fell inside a warning, on average 22 minutes after it went out.
Minnesota, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 187 | 106 | 43% | 231 | 72% | 22 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Forks, ND: severe thunderstorm warnings | 53 | 41 | 23% | 115 | 60% | 24 min |
| NWS Duluth, MN: severe thunderstorm warnings | 49 | 15 | 69% | 23 | 96% | 22 min |
| NWS Twin Cities, MN: severe thunderstorm warnings | 94 | 49 | 48% | 135 | 62% | 22 min |
| NWS Aberdeen, SD: severe thunderstorm warnings | 147 | 86 | 41% | 173 | 71% | 19 min |
| NWS Sioux Falls, SD: severe thunderstorm warnings | 232 | 172 | 26% | 374 | 81% | 19 min |
| NWS La Crosse, WI: severe thunderstorm warnings | 78 | 50 | 36% | 151 | 85% | 25 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 23, 6:44 PM CDT | Severe Thunderstorm Warning | FSD | Nobles, Rock | 46 min |
| Mar 23, 9:03 PM CDT | Severe Thunderstorm Warning | FSD | Jackson | 30 min |
| Apr 23, 7:51 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Crow Wing | 54 min |
| Apr 23, 8:43 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Carlton, Saint Louis | 62 min |
| Apr 23, 9:45 PM CDT | Severe Thunderstorm Warning | DLH | Carlton, Saint Louis | 30 min |
| Apr 23, 10:15 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 37 min |
| Apr 24, 4:48 PM CDT | Severe Thunderstorm Warning | ARX | Wabasha | 42 min |
| Apr 24, 5:06 PM CDT | Severe Thunderstorm Warning | ARX | Olmsted | 25 min |
| Apr 24, 5:28 PM CDT | Severe Thunderstorm Warning | ARX | Olmsted, Wabasha, Winona | 47 min |
| Apr 24, 9:47 PM CDT | Severe Thunderstorm Warning | ARX | Fillmore, Mower | 28 min |
| May 5, 2:34 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Carlton, Pine | 41 min |
| May 5, 3:12 PM CDT | Severe Thunderstorm Warning | DLH | Carlton, Saint Louis | 48 min |
| May 5, 3:17 PM CDT | Severe Thunderstorm Warning | DLH | Pine | 43 min |
| May 5, 3:49 PM CDT | Severe Thunderstorm Warning | DLH | Carlton, Saint Louis | 41 min |
| May 5, 3:54 PM CDT | Severe Thunderstorm Warning | DLH | Pine | 51 min |
| May 6, 5:02 PM CDT | Severe Thunderstorm Warning | MPX | Benton | 46 min |
| May 6, 5:16 PM CDT | Severe Thunderstorm Warning | FGF | Clearwater | 44 min |
| May 6, 6:00 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Clearwater | 60 min |
| May 11, 4:27 PM CDT | Severe Thunderstorm Warning | FGF | Marshall, Polk | 34 min |
| May 13, 5:05 PM CDT | Severe Thunderstorm Warning | ARX | Wabasha | 40 min |
| May 13, 5:15 PM CDT | Severe Thunderstorm Warning | FGF | Otter Tail, Wilkin | 60 min |
| May 19, 9:11 PM CDT | Severe Thunderstorm Warning | DLH | Cook | 30 min |
| May 29, 6:53 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 30 min |
| May 31, 4:32 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Crow Wing | 43 min |
| Jun 13, 1:37 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 27 min |
| Jun 16, 6:54 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon | 51 min |
| Jun 16, 7:44 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon, Murray, Pipestone | 31 min |
| Jun 16, 8:41 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Murray | 49 min |
| Jun 16, 9:28 PM CDT | Severe Thunderstorm Warning | FSD | Murray, Nobles | 47 min |
| Jun 17, 7:17 AM CDT | Severe Thunderstorm Warning | MPX | Brown, Redwood | 43 min |
| Jun 17, 10:02 AM CDT | Severe Thunderstorm Warning | MPX | Faribault, Freeborn | 58 min |
| Jun 17, 7:14 PM CDT | Severe Thunderstorm Warning | ARX | Dodge, Mower | 46 min |
| Jun 17, 7:49 PM CDT | Severe Thunderstorm Warning | MPX | Le Sueur, Rice, Steele, Waseca | 56 min |
| Jun 17, 8:29 PM CDT | Severe Thunderstorm Warning | ARX | Fillmore | 46 min |
| Jun 17, 9:14 PM CDT | Severe Thunderstorm Warning | ARX | Mower, Olmsted | 39 min |
| Jun 17, 10:48 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Goodhue, Washington | 42 min |
| Jun 17, 11:20 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue | 40 min |
| Jun 18, 12:55 PM CDT | Severe Thunderstorm Warning | MPX | Douglas | 50 min |
| Jun 18, 1:26 PM CDT | Severe Thunderstorm Warning | FGF | Otter Tail | 64 min |
| Jun 18, 1:50 PM CDT | Severe Thunderstorm Warning | MPX | Douglas | 55 min |
| Jun 18, 2:37 PM CDT | Severe Thunderstorm Warning | MPX | Douglas, Todd | 53 min |
| Jun 18, 3:41 PM CDT | Severe Thunderstorm Warning | MPX | Stearns | 64 min |
| Jun 18, 4:47 PM CDT | Severe Thunderstorm Warning | MPX | Morrison, Stearns | 43 min |
| Jun 18, 5:13 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Morrison, Stearns | 62 min |
| Jun 18, 6:04 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Mille Lacs, Morrison | 56 min |
| Jun 18, 6:15 PM CDT | Severe Thunderstorm Warning | ABR | Traverse | 60 min |
| Jun 18, 6:32 PM CDT | Severe Thunderstorm Warning | MPX | Kanabec | 58 min |
| Jun 18, 6:44 PM CDT | Severe Thunderstorm Warning | MPX | Stevens | 61 min |
| Jun 18, 6:50 PM CDT | Severe Thunderstorm Warning | FGF | Grant | 55 min |
| Jun 18, 7:03 PM CDT | Severe Thunderstorm Warning | MPX | Douglas | 57 min |
| Jun 18, 7:13 PM CDT | Severe Thunderstorm Warning | FGF | Otter Tail, Wadena | 62 min |
| Jun 18, 7:19 PM CDT | Severe Thunderstorm Warning | DLH | Pine | 56 min |
| Jun 18, 8:00 PM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 60 min |
| Jun 18, 8:51 PM CDT | Severe Thunderstorm Warning | MPX | Stearns | 54 min |
| Jun 18, 9:43 PM CDT | Severe Thunderstorm Warning | MPX | Sherburne, Stearns, Wright | 47 min |
| Jun 18, 10:18 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon | 42 min |
| Jun 19, 1:00 AM CDT | Severe Thunderstorm Warning | MPX | Stearns | 45 min |
| Jun 19, 4:20 PM CDT | Severe Thunderstorm Warning | FSD | Nobles, Rock | 40 min |
| Jun 19, 5:28 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Clearwater, Mahnomen, Norman | 62 min |
| Jun 22, 10:15 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 45 min |
| Jun 23, 10:05 AM CDT | Severe Thunderstorm Warning | FSD | Rock | 25 min |
| Jun 23, 12:04 PM CDT | Severe Thunderstorm Warning | FSD | Jackson | 41 min |
| Jun 23, 12:29 PM CDT | Severe Thunderstorm Warning | MPX | Brown, Martin, Watonwan | 61 min |
| Jun 23, 1:03 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Faribault, Nicollet, Sibley | 57 min |
| Jun 23, 2:18 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin | 57 min |
| Jun 23, 2:31 PM CDT | Severe Thunderstorm Warning | DLH | Crow Wing | 44 min |
| Jun 23, 3:45 PM CDT | Severe Thunderstorm Warning | DLH | Crow Wing | 33 min |
| Jun 23, 4:10 PM CDT | Severe Thunderstorm Warning | ARX | Wabasha | 34 min |
| Jul 6, 2:33 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln | 27 min |
| Jul 6, 2:57 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Pipestone | 33 min |
| Jul 7, 4:09 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln | 51 min |
| Jul 7, 5:42 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Lyon, Murray, Pipestone | 48 min |
| Jul 7, 6:17 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson, Murray, Nobles | 28 min |
| Jul 7, 6:55 PM CDT | Severe Thunderstorm Warning | MPX | Martin, Watonwan | 55 min |
| Jul 9, 7:44 PM CDT | Severe Thunderstorm Warning | FSD | Nobles, Rock | 46 min |
| Jul 9, 7:52 PM CDT | Severe Thunderstorm Warning | FSD | Nobles | 38 min |
| Jul 9, 8:15 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson, Murray, Nobles | 45 min |
| Jul 9, 8:54 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson, Murray, Nobles | 36 min |
| Jul 9, 8:58 PM CDT | Severe Thunderstorm Warning | MPX | Martin, Watonwan | 42 min |
| Jul 9, 9:28 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson | 25 min |
| Jul 14, 3:31 PM CDT | Severe Thunderstorm Warning | FGF | Wadena | 44 min |
| Jul 14, 3:47 PM CDT | Severe Thunderstorm Warning | MPX | Kandiyohi | 28 min |
| Jul 14, 3:49 PM CDT | Severe Thunderstorm Warning | MPX | Morrison, Todd | 43 min |
| Jul 14, 3:54 PM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 66 min |
| Jul 14, 4:36 PM CDT | Severe Thunderstorm Warning | MPX | Kandiyohi, Meeker, Stearns | 39 min |
| Jul 14, 4:45 PM CDT | Severe Thunderstorm Warning | FGF | Grant | 39 min |
| Jul 14, 4:47 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Pipestone | 43 min |
| Jul 14, 4:55 PM CDT | Severe Thunderstorm Warning | MPX | Douglas | 50 min |
| Jul 14, 5:00 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Crow Wing | 60 min |
| Jul 14, 6:00 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin | 60 min |
| Jul 14, 6:09 PM CDT | Severe Thunderstorm Warning | FSD | Jackson, Nobles | 36 min |
| Jul 14, 6:11 PM CDT | Severe Thunderstorm Warning | DLH | Crow Wing | 49 min |
| Jul 14, 6:11 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Sherburne, Stearns | 52 min |
| Jul 14, 6:38 PM CDT | Severe Thunderstorm Warning | FSD | Jackson, Nobles | 37 min |
| Jul 14, 7:55 PM CDT | Severe Thunderstorm Warning | MPX | Faribault, Martin | 51 min |
| Jul 14, 8:00 PM CDT | Severe Thunderstorm Warning | MPX | Kanabec, Mille Lacs | 45 min |
| Jul 14, 9:36 PM CDT | Severe Thunderstorm Warning | DLH | Pine | 39 min |
| Jul 20, 6:09 AM CDT | Severe Thunderstorm Warning | FGF | Norman | 47 min |
| Jul 21, 1:58 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Morrison | 47 min |
| Jul 21, 2:01 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson | 29 min |
| Jul 21, 2:22 PM CDT | Severe Thunderstorm Warning | MPX | Benton | 38 min |
| Jul 21, 2:43 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth | 47 min |
| Jul 21, 2:53 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Sherburne | 37 min |
| Jul 21, 3:43 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Sherburne, Wright | 62 min |
| Jul 21, 3:52 PM CDT | Severe Thunderstorm Warning | MPX | Hennepin, Wright | 53 min |
| Jul 21, 4:11 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Hennepin | 49 min |
| Jul 21, 4:16 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Hennepin, Wright | 44 min |
| Jul 21, 4:19 PM CDT | Severe Thunderstorm Warning | MPX | Washington | 41 min |
| Jul 21, 4:22 PM CDT | Severe Thunderstorm Warning | DLH | Carlton, Saint Louis | 23 min |
| Jul 21, 4:36 PM CDT | Severe Thunderstorm Warning | MPX | Anoka | 24 min |
| Jul 21, 4:53 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Hennepin | 36 min |
| Jul 21, 4:56 PM CDT | Severe Thunderstorm Warning | MPX | Le Sueur, Nicollet, Sibley | 49 min |
| Jul 21, 5:02 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Washington | 43 min |
| Jul 21, 5:05 PM CDT | Severe Thunderstorm Warning | MPX | Ramsey | 24 min |
| Jul 21, 7:17 PM CDT | Severe Thunderstorm Warning | ARX | Olmsted | 58 min |
| Jul 22, 2:20 PM CDT | Severe Thunderstorm Warning | MPX | Le Sueur, Scott | 24 min |
| Jul 23, 8:11 PM CDT | Severe Thunderstorm Warning | FGF | Kittson, Marshall | 64 min |
| Jul 23, 8:16 PM CDT | Severe Thunderstorm Warning | FGF | Roseau | 59 min |
| Jul 23, 8:59 PM CDT | Severe Thunderstorm Warning | FGF | Marshall, Pennington, Polk | 61 min |
| Jul 23, 9:20 PM CDT | Severe Thunderstorm Warning | FGF | Marshall | 19 min |
| Jul 23, 9:37 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Lake of the Woods | 53 min |
| Jul 23, 9:59 PM CDT | Severe Thunderstorm Warning | FGF | Polk, Red Lake | 61 min |
| Jul 23, 10:48 PM CDT | Severe Thunderstorm Warning | DLH | Itasca, Koochiching | 38 min |
| Jul 23, 10:59 PM CDT | Severe Thunderstorm Warning | FGF | Polk, Red Lake | 47 min |
| Jul 24, 5:34 AM CDT | Severe Thunderstorm Warning | DLH | Carlton, Pine | 39 min |
| Jul 24, 7:41 AM CDT | Severe Thunderstorm Warning | MPX | Anoka, Ramsey, Washington | 34 min |
| Jul 24, 8:28 AM CDT | Severe Thunderstorm Warning | MPX | Ramsey, Washington | 32 min |
| Jul 24, 9:01 AM CDT | Severe Thunderstorm Warning | MPX | Dakota, Goodhue, Washington | 29 min |
| Jul 24, 9:15 AM CDT | Severe Thunderstorm Warning | MPX | Dakota, Goodhue, Rice | 60 min |
| Jul 24, 9:28 AM CDT | Severe Thunderstorm Warning | MPX | Dakota, Goodhue | 48 min |
| Jul 24, 9:38 AM CDT | Severe Thunderstorm Warning | MPX | Rice, Steele | 32 min |
| Jul 24, 9:48 AM CDT | Severe Thunderstorm Warning | ARX | Dodge | 57 min |
| Jul 24, 10:16 AM CDT | Severe Thunderstorm Warning | ARX | Olmsted, Wabasha | 59 min |
| Jul 24, 10:43 AM CDT | Severe Thunderstorm Warning | ARX | Dodge, Fillmore, Mower, Olmsted | 62 min |
| Jul 24, 11:37 AM CDT | Severe Thunderstorm Warning | ARX | Fillmore | 53 min |
| Jul 31, 5:51 PM CDT | Severe Thunderstorm Warning | ABR | Big Stone, Traverse | 24 min |
| Jul 31, 5:55 PM CDT | Severe Thunderstorm Warning | MPX | Stevens | 65 min |
| Jul 31, 6:49 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Pipestone | 26 min |
| Jul 31, 7:13 PM CDT | Severe Thunderstorm Warning | FSD | Murray, Nobles, Pipestone, Rock | 47 min |
| Aug 2, 8:44 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon | 31 min |
| Aug 2, 8:45 PM CDT | Severe Thunderstorm Warning | MPX | Redwood, Yellow Medicine | 45 min |
| Aug 2, 9:07 PM CDT | Severe Thunderstorm Warning | DLH | Pine | 38 min |
| Aug 2, 9:17 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Lyon | 13 min |
| Aug 2, 9:24 PM CDT | Severe Thunderstorm Warning | MPX | Redwood, Renville, Yellow Medicine | 51 min |
| Aug 2, 9:40 PM CDT | Severe Thunderstorm Warning | MPX | Renville | 49 min |
| Aug 2, 9:55 PM CDT | Severe Thunderstorm Warning | MPX | Brown, Redwood | 50 min |
| Aug 2, 10:06 PM CDT | Severe Thunderstorm Warning | MPX | McLeod, Sibley | 54 min |
| Aug 2, 10:20 PM CDT | Severe Thunderstorm Warning | MPX | Watonwan | 39 min |
| Aug 2, 10:39 PM CDT | Severe Thunderstorm Warning | MPX | Carver | 52 min |
| Aug 2, 10:43 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Brown | 47 min |
| Aug 2, 10:56 PM CDT | Severe Thunderstorm Warning | MPX | McLeod, Scott, Sibley | 49 min |
| Aug 2, 11:10 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Dakota, Hennepin, Scott | 40 min |
| Aug 2, 11:18 PM CDT | Severe Thunderstorm Warning | MPX | Dakota | 47 min |
| Aug 2, 11:45 PM CDT | Severe Thunderstorm Warning | MPX | Le Sueur, Rice, Scott | 20 min |
| Aug 2, 11:48 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue, Washington | 57 min |
| Aug 3, 1:34 AM CDT | Severe Thunderstorm Warning | ARX | Fillmore, Houston, Olmsted, Winona | 41 min |
| Aug 3, 6:49 PM CDT | Severe Thunderstorm Warning | ABR | Traverse | 11 min |
| Aug 3, 10:47 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Chisago, Isanti, Washington | 43 min |
| Aug 8, 4:11 AM CDT | Severe Thunderstorm Warning | MPX | Meeker, Sherburne, Stearns, Wright | 38 min |
| Aug 8, 8:06 AM CDT | Severe Thunderstorm Warning | MPX | Renville | 39 min |
| Aug 8, 2:25 PM CDT | Severe Thunderstorm Warning | FSD | Pipestone | 35 min |
| Aug 8, 3:15 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon, Murray, Pipestone | 30 min |
| Aug 8, 3:42 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Murray | 23 min |
| Aug 8, 3:46 PM CDT | Severe Thunderstorm Warning | MPX | Brown, Redwood | 28 min |
| Aug 14, 6:57 AM CDT | Severe Thunderstorm Warning | FGF | Lake of the Woods | 48 min |
| Aug 14, 9:39 AM CDT | Severe Thunderstorm Warning | FGF | Polk | 66 min |
| Aug 14, 10:30 AM CDT | Severe Thunderstorm Warning | FGF | Marshall, Pennington, Polk, Red Lake | 60 min |
| Aug 14, 11:26 AM CDT | Severe Thunderstorm Warning | FGF | Marshall, Pennington, Polk, Red Lake | 64 min |
| Aug 14, 9:00 PM CDT | Severe Thunderstorm Warning | DLH | Koochiching | 43 min |
| Aug 14, 10:17 PM CDT | Severe Thunderstorm Warning | DLH | Koochiching | 39 min |
| Aug 14, 11:23 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 67 min |
| Aug 15, 3:17 AM CDT | Severe Thunderstorm Warning | DLH | Lake | 23 min |
| Aug 15, 5:30 AM CDT | Severe Thunderstorm Warning | FGF | Beltrami | 60 min |
| Aug 15, 6:32 AM CDT | Severe Thunderstorm Warning | FGF | Beltrami | 47 min |
| Aug 18, 11:39 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Lac qui Parle, Stevens, Swift | 36 min |
| Aug 19, 12:41 AM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Kandiyohi, Swift | 34 min |
| Aug 19, 4:49 PM CDT | Severe Thunderstorm Warning | MPX | Redwood, Yellow Medicine | 41 min |
| Aug 19, 5:18 PM CDT | Severe Thunderstorm Warning | MPX | Redwood | 21 min |
| Aug 19, 6:02 PM CDT | Severe Thunderstorm Warning | MPX | Brown, Redwood | 58 min |
| Aug 19, 6:44 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Renville | 44 min |
| Aug 25, 2:58 AM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Brown, Martin, Nicollet, Sibley, Watonwan | 47 min |
| Sep 8, 7:33 AM CDT | Severe Thunderstorm Warning | MPX | Stevens, Swift | 42 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Nobles County11
- Lincoln County10
- Murray County10
- Jackson County9
- Saint Louis County9
- Lyon County9
- Stearns County9
- Crow Wing County8
- Pipestone County8
- Redwood County8
- Washington County8
- Aitkin County7
- Carlton County7
- Olmsted County7
- Pine County7
- Benton County7
- Polk County7
- Brown County7
- Dakota County7
- Cottonwood County7
- Marshall County6
- Goodhue County6
- Rock County5
- Wabasha County5
- Fillmore County5
- Douglas County5
- Morrison County5
- Sherburne County5
- Wright County5
- Martin County5
- Watonwan County5
- Sibley County5
- Anoka County5
- Hennepin County5
- Mower County4
- Beltrami County4
- Le Sueur County4
- Rice County4
- Stevens County4
- Blue Earth County4
45 more counties
- Carver County4
- Scott County4
- Red Lake County4
- Renville County4
- Clearwater County3
- Otter Tail County3
- Faribault County3
- Dodge County3
- Traverse County3
- Nicollet County3
- Kandiyohi County3
- Ramsey County3
- Pennington County3
- Koochiching County3
- Yellow Medicine County3
- Chippewa County3
- Swift County3
- Winona County2
- Steele County2
- Todd County2
- Mille Lacs County2
- Kanabec County2
- Grant County2
- Wadena County2
- Cass County2
- Norman County2
- Meeker County2
- Lake of the Woods County2
- McLeod County2
- Wilkin County1
- Cook County1
- Clay County1
- Freeborn County1
- Waseca County1
- Becker County1
- Mahnomen County1
- Kittson County1
- Roseau County1
- Itasca County1
- Big Stone County1
- Houston County1
- Chisago County1
- Isanti County1
- Lake County1
- Lac qui Parle County1
The busiest days
Days with the most alerts issued, by UTC date.
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.