Weather alerts in Minnesota, 2022
2,995 weather alerts in 2022, 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 2022. Tap one for its archive.
- Alerts
- 2,995
- Warnings
- 1,171
- Watches
- 155
- Advisories
- 658
- Busiest month
- May804 alerts
- Busiest day
- May 30, 2022152 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
37 of 100 tornado warnings covering Minnesota in 2022 had a tornado report inside them; 58 of 100 tornado reports fell inside a warning, on average 9 minutes after it went out.
Minnesota, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 100 | 37 | 63% | 100 | 58% | 9 min |
| Severe thunderstorm warnings | 693 | 478 | 31% | 1,594 | 82% | 24 min |
| Flash flood warnings | 30 | 15 | 50% | 31 | 65% | 99 min |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS La Crosse, WI: tornado warnings | 21 | 7 | 67% | 19 | 53% | 11 min |
| NWS La Crosse, WI: severe thunderstorm warnings | 129 | 66 | 49% | 218 | 70% | 22 min |
| NWS La Crosse, WI: flash flood warnings | 9 | 5 | 44% | 10 | 60% | 65 min |
| NWS Aberdeen, SD: tornado warnings | 33 | 14 | 58% | 28 | 68% | 11 min |
| NWS Aberdeen, SD: severe thunderstorm warnings | 260 | 172 | 34% | 409 | 81% | 23 min |
| NWS Aberdeen, SD: flash flood warnings | 9 | 2 | 78% | 4 | 50% | 18 min |
| NWS Twin Cities, MN: tornado warnings | 56 | 15 | 73% | 37 | 59% | 12 min |
| NWS Twin Cities, MN: severe thunderstorm warnings | 272 | 142 | 48% | 634 | 80% | 23 min |
| NWS Twin Cities, MN: flash flood warnings | 7 | 4 | 43% | 15 | 53% | 38 min |
| NWS Duluth, MN: tornado warnings | 7 | 1 | 86% | 13 | 8% | 7 min |
| NWS Duluth, MN: severe thunderstorm warnings | 149 | 104 | 30% | 441 | 75% | 22 min |
| NWS Duluth, MN: flash flood warnings | 12 | 4 | 67% | 15 | 67% | 136 min |
| NWS Grand Forks, ND: tornado warnings | 34 | 18 | 47% | 59 | 75% | 12 min |
| NWS Grand Forks, ND: severe thunderstorm warnings | 228 | 203 | 11% | 743 | 87% | 27 min |
| NWS Grand Forks, ND: flash flood warnings | 11 | 8 | 27% | 13 | 85% | 207 min |
| NWS Sioux Falls, SD: tornado warnings | 34 | 8 | 76% | 24 | 50% | 8 min |
| NWS Sioux Falls, SD: severe thunderstorm warnings | 306 | 208 | 32% | 564 | 90% | 20 min |
| NWS Sioux Falls, SD: flash flood warnings | 6 | 5 | 17% | 9 | 89% | 112 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
2,995 alerts are too many to list on one page. Narrow it to a product above, to a month in the chart, or to a county.
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Saint Louis County295
- Polk County241
- Marshall County215
- Clay County212
- Norman County198
- Carlton County197
- Itasca County192
- Lake County188
- Wilkin County186
- Kittson County181
- Otter Tail County181
- Aitkin County180
- Beltrami County178
- Becker County170
- Pennington County170
- Red Lake County167
- Cass County163
- Mahnomen County161
- Clearwater County159
- Koochiching County158
- Crow Wing County154
- Roseau County151
- Cook County149
- Murray County143
- Pine County142
- Stearns County139
- Cottonwood County137
- Traverse County136
- Jackson County136
- Redwood County135
- Rock County135
- Blue Earth County134
- Morrison County133
- Renville County133
- Lincoln County133
- Lyon County133
- Lake of the Woods County133
- Nobles County132
- Brown County130
- Pipestone County130
47 more counties
- Grant County129
- Big Stone County126
- Kandiyohi County126
- Faribault County125
- Waseca County125
- Yellow Medicine County125
- Dakota County124
- Fillmore County124
- Wright County123
- Chippewa County123
- Hubbard County123
- Lac qui Parle County122
- Sherburne County121
- Watonwan County121
- Benton County120
- Freeborn County120
- Pope County120
- Todd County120
- Nicollet County119
- Swift County119
- Olmsted County118
- Sibley County118
- Steele County117
- Isanti County116
- Douglas County116
- Martin County116
- Wadena County115
- Le Sueur County113
- Hennepin County112
- Washington County112
- Meeker County112
- Mower County111
- McLeod County111
- Dodge County107
- Mille Lacs County107
- Scott County106
- Rice County106
- Stevens County106
- Winona County104
- Chisago County102
- Anoka County101
- Carver County100
- Ramsey County100
- Goodhue County99
- Kanabec County98
- Wabasha County95
- Houston County94
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20212023
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.