Alert archive / Minnesota / Rock County
Weather alerts in Rock County, Minnesota, 2025
148 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Rock County and its neighbors
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 148
- Warnings
- 40
- Watches
- 22
- Advisories
- 52
- Busiest month
- July37 alerts
- Busiest day
- July 28, 20258 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Rock County, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 24 | 16 | 33% | 9 | 67% | 26 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Sioux Falls, SD: tornado warnings | 20 | 5 | 75% | 9 | 56% | 8 min |
| NWS Sioux Falls, SD: severe thunderstorm warnings | 332 | 191 | 42% | 500 | 85% | 22 min |
| NWS Sioux Falls, SD: flash flood warnings | 25 | 9 | 64% | 19 | 74% | 80 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 | Lasted |
|---|---|---|---|
| Jan 17, 11:30 AM CST | Wind Advisory | FSD | 7 hr |
| Jan 17, 1:13 PM CST | Cold Weather Advisory | FSD | 47 hr |
| Jan 18, 1:24 PM CST | Cold Weather Advisory | FSD | 71 hr |
| Jan 20, 2:45 AM CST | Extreme Cold Warning | FSD | 33 hr |
| Feb 1, 2:44 AM CST | Wind Advisory | FSD | 12 hr |
| Feb 2, 2:07 AM CST | Dense Fog Advisory | FSD | 9 hr |
| Feb 7, 2:52 AM CST | Winter Weather Advisory | FSD | 35 hr |
| Feb 10, 2:13 AM CST | Winter Weather Advisory | FSD | 22 hr |
| Feb 10, 2:26 PM CST | Cold Weather Advisory | FSD | 19 hr |
| Feb 12, 2:49 AM CST | Cold Weather Advisory | FSD | 30 hr |
| Feb 16, 3:02 AM CST | Cold Weather Advisory | FSD | 42 hr |
| Feb 16, 3:02 AM CST | Extreme Cold Watch | FSD | 24 hr |
| Feb 17, 2:57 AM CST | Extreme Cold Warning | FSD | 33 hr |
| Feb 17, 11:50 AM CST | Cold Weather Advisory | FSD | 9 hr |
| Feb 18, 3:09 AM CST | Cold Weather Advisory | FSD | 31 hr |
| Feb 19, 2:40 AM CST | Cold Weather Advisory | FSD | 30 hr |
| Feb 25, 4:14 AM CST | Dense Fog Advisory | FSD | 7 hr |
| Feb 27, 1:35 PM CST | Wind Advisory | FSD | 28 hr |
| Mar 3, 2:10 PM CST | Winter Weather Advisory | FSD | 40 hr |
| Mar 4, 11:22 AM CST | High Wind Warning | FSD | 19 hr |
| Mar 5, 5:47 AM CST | Wind Advisory | FSD | 6 hr |
| Mar 13, 3:07 PM CDT | Winter Storm Watch | FSD | 23 hr |
| Mar 14, 1:46 PM CDT | Wind Advisory | FSD | 25 hr |
| Mar 14, 1:55 PM CDT | Winter Weather Advisory | FSD | 23 hr |
| Mar 18, 3:21 AM CDT | Winter Weather Advisory | FSD | 34 hr |
| Mar 18, 2:24 PM CDT | Wind Advisory | FSD | 29 hr |
| Mar 22, 2:25 PM CDT | Wind Advisory | FSD | 29 hr |
| Mar 27, 2:06 PM CDT | Fire Weather Watch | FSD | 14 hr |
| Mar 28, 3:43 AM CDT | Red Flag Warning | FSD | 16 hr |
| Apr 9, 2:23 AM CDT | Red Flag Warning | FSD | 18 hr |
| Apr 11, 3:17 AM CDT | Dense Fog Advisory | FSD | 7 hr |
| Apr 14, 3:10 AM CDT | Wind Advisory | FSD | 16 hr |
| Apr 14, 1:28 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 28, 10:41 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 28, 12:29 PM CDT | Tornado Watch | SPC | 10 hr |
| Apr 28, 12:56 PM CDT | Severe Thunderstorm Warning | FSD | 34 min |
| Apr 28, 1:28 PM CDT | Severe Thunderstorm Warning | FSD | 47 min |
| May 8, 2:35 PM CDT | Fire Weather Watch | FSD | 48 hr |
| May 10, 2:05 PM CDT | Fire Weather Watch | FSD | 32 hr |
| May 10, 2:05 PM CDT | Red Flag Warning | FSD | 32 hr |
| May 11, 9:50 PM CDT | Red Flag Warning | FSD | 23 hr |
| May 12, 1:42 PM CDT | Fire Weather Watch | FSD | 14 hr |
| May 13, 3:33 AM CDT | Red Flag Warning | FSD | 17 hr |
| May 14, 2:00 PM CDT | Wind Advisory | FSD | 53 hr |
| May 15, 1:08 AM CDT | Mesoscale Discussion | SPC | 97 min |
| May 15, 1:36 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 15, 3:06 AM CDT | Severe Thunderstorm Warning | FSD | 69 min |
| May 15, 7:23 AM CDT | Mesoscale Discussion | SPC | 97 min |
| May 15, 2:15 PM CDT | Wind Advisory | FSD | 29 hr |
| May 17, 2:19 AM CDT | Frost Advisory | FSD | 28 hr |
| Jun 2, 1:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 2, 3:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 11, 1:33 PM CDT | Severe Thunderstorm Warning | FSD | 27 min |
| Jun 11, 1:56 PM CDT | Severe Thunderstorm Warning | FSD | 49 min |
| Jun 11, 1:56 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 14, 4:37 AM CDT | Dense Fog Advisory | FSD | 4 hr |
| Jun 18, 2:02 PM CDT | Extreme Heat Watch | FSD | 23 hr |
| Jun 19, 1:30 PM CDT | Extreme Heat Warning | FSD | 3 days |
| Jun 19, 9:11 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 28, 10:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 28, 11:12 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 29, 1:01 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 2, 11:52 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jul 7, 1:11 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 3:14 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 7, 5:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 10, 1:01 AM CDT | Severe Thunderstorm Warning | FSD | 16 min |
| Jul 10, 1:39 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 11, 1:27 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 5:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 15, 8:19 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jul 15, 8:29 PM CDT | Severe Thunderstorm Warning | FSD | 61 min |
| Jul 15, 8:41 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 18, 6:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 18, 8:06 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 18, 11:30 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 20, 2:19 PM CDT | Heat Advisory | FSD | 30 hr |
| Jul 22, 3:23 AM CDT | Heat Advisory | FSD | 17 hr |
| Jul 23, 7:27 PM CDT | Flash Flood Warning | FSD | 107 min |
| Jul 26, 2:53 AM CDT | Extreme Heat Watch | FSD | 11 hr |
| Jul 26, 4:32 AM CDT | Dense Fog Advisory | FSD | 4 hr |
| Jul 26, 2:08 PM CDT | Extreme Heat Warning | FSD | 30 hr |
| Jul 27, 2:34 PM CDT | Extreme Heat Warning | FSD | 29 hr |
| Jul 27, 4:25 PM CDT | Mesoscale Discussion | SPC | 35 min |
| Jul 27, 4:47 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 27, 7:19 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 27, 9:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 27, 11:19 PM CDT | Severe Thunderstorm Warning | FSD | 41 min |
| Jul 27, 11:58 PM CDT | Severe Thunderstorm Warning | FSD | 62 min |
| Jul 28, 12:21 AM CDT | Severe Thunderstorm Warning | FSD | 39 min |
| Jul 28, 1:00 AM CDT | Severe Thunderstorm Warning | FSD | 15 min |
| Jul 28, 5:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 28, 6:57 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 28, 8:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 28, 8:46 PM CDT | Severe Thunderstorm Warning | FSD | 44 min |
| Jul 28, 9:39 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 29, 7:45 PM CDT | Severe Thunderstorm Warning | FSD | 45 min |
| Jul 29, 8:05 PM CDT | Severe Thunderstorm Warning | FSD | 55 min |
| Jul 29, 8:56 PM CDT | Severe Thunderstorm Warning | FSD | 49 min |
| Aug 5, 11:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Aug 8, 8:39 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 8, 9:34 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 8, 11:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 15, 1:59 PM CDT | Heat Advisory | FSD | 30 hr |
| Aug 16, 2:18 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Aug 16, 3:24 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 16, 3:39 AM CDT | Severe Thunderstorm Warning | FSD | 51 min |
| Aug 16, 4:04 AM CDT | Severe Thunderstorm Warning | FSD | 41 min |
| Aug 16, 4:38 AM CDT | Severe Thunderstorm Warning | FSD | 52 min |
| Aug 16, 5:01 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Aug 18, 1:50 AM CDT | Mesoscale Discussion | SPC | 85 min |
| Aug 19, 2:29 AM CDT | Dense Fog Advisory | FSD | 7 hr |
| Sep 2, 3:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 2, 7:38 PM CDT | Severe Thunderstorm Warning | FSD | 36 min |
| Sep 3, 2:15 PM CDT | Wind Advisory | FSD | 31 hr |
| Sep 4, 4:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Sep 6, 4:17 PM CDT | Frost Advisory | FSD | 17 hr |
| Sep 9, 10:49 PM CDT | Dense Fog Advisory | FSD | 12 hr |
| Sep 14, 3:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Sep 14, 4:03 PM CDT | Severe Thunderstorm Warning | FSD | 27 min |
| Sep 21, 4:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Sep 21, 6:31 PM CDT | Severe Thunderstorm Warning | FSD | 44 min |
| Sep 21, 6:48 PM CDT | Severe Thunderstorm Warning | FSD | 42 min |
| Sep 21, 7:23 PM CDT | Severe Thunderstorm Warning | FSD | 37 min |
| Sep 21, 7:53 PM CDT | Severe Thunderstorm Warning | FSD | 52 min |
| Oct 15, 7:31 PM CDT | Dense Fog Advisory | FSD | 8 hr |
| Oct 20, 2:36 PM CDT | Wind Advisory | FSD | 27 hr |
| Oct 30, 1:31 AM CDT | Dense Fog Advisory | FSD | 9 hr |
| Nov 7, 9:12 PM CST | Winter Weather Advisory | FSD | 17 hr |
| Nov 20, 4:13 AM CST | Dense Fog Advisory | FSD | 8 hr |
| Nov 24, 1:42 PM CST | Wind Advisory | FSD | 37 hr |
| Nov 26, 2:26 PM CST | Winter Storm Watch | FSD | 24 hr |
| Nov 27, 2:53 PM CST | Winter Storm Warning | FSD | 57 hr |
| Dec 5, 3:33 AM CST | Winter Weather Advisory | FSD | 44 hr |
| Dec 6, 3:08 AM CST | Winter Storm Warning | FSD | 21 hr |
| Dec 8, 5:35 AM CST | Dense Fog Advisory | FSD | 15 hr |
| Dec 8, 2:45 PM CST | High Wind Warning | FSD | 39 hr |
| Dec 8, 2:45 PM CST | Winter Storm Watch | FSD | 21 hr |
| Dec 9, 11:52 AM CST | Winter Weather Advisory | FSD | 16 hr |
| Dec 10, 3:13 AM CST | Winter Weather Advisory | FSD | 39 hr |
| Dec 12, 2:08 PM CST | Cold Weather Advisory | FSD | 44 hr |
| Dec 16, 1:57 PM CST | High Wind Watch | FSD | 13 hr |
| Dec 17, 2:43 AM CST | High Wind Warning | FSD | 42 hr |
| Dec 18, 6:47 AM CST | Winter Weather Advisory | FSD | 11 hr |
| Dec 24, 1:19 PM CST | Dense Fog Advisory | FSD | 68 hr |
| Dec 27, 12:47 PM CST | Dense Fog Advisory | FSD | 17 hr |
| Dec 27, 2:10 PM CST | Wind Advisory | FSD | 34 hr |
| Dec 27, 2:11 PM CST | Winter Weather Advisory | FSD | 40 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 | 24 |
| Severe Thunderstorm Watch | 10 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 34 |
| Flooding | |
| Flash Flood Warning | 1 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 11 |
| Heat | |
| Extreme Heat Warning | 3 |
| Extreme Heat Watch | 2 |
| Heat Advisory | 3 |
| Cold | |
| Extreme Cold Warning | 2 |
| Extreme Cold Watch | 1 |
| Cold Weather Advisory | 9 |
| Frost Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 3 |
| High Wind Watch | 1 |
| Wind Advisory | 14 |
| Fire | |
| Red Flag Warning | 5 |
| Fire Weather Watch | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 13 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20242026
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.