Alert archive / Minnesota / Lyon County
Weather alerts in Lyon County, Minnesota, 2026
80 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Lyon County and its neighbors
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Alerts
- 80
- Warnings
- 18
- Watches
- 14
- Advisories
- 28
- Busiest month
- July15 alerts
- Busiest day
- February 18, 20263 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Lyon County, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 2 | 1 | 50% | 3 | 0% | |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Sioux Falls, SD: tornado warnings | 40 | 13 | 68% | 23 | 65% | 12 min |
| NWS Sioux Falls, SD: severe thunderstorm warnings | 292 | 194 | 34% | 549 | 89% | 21 min |
| NWS Sioux Falls, SD: flash flood warnings | 16 | 4 | 75% | 5 | 80% | 12 min |
An office's figures cover every county it serves, including across state lines.
The year is still running; reports filed late and damage surveys can still change these figures.
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 4, 9:15 PM CST | Dense Fog Advisory | FSD | 12 hr |
| Jan 5, 9:42 PM CST | Dense Fog Advisory | FSD | 9 hr |
| Jan 15, 1:59 PM CST | Winter Weather Advisory | FSD | 34 hr |
| Jan 17, 2:21 PM CST | Winter Weather Advisory | FSD | 34 hr |
| Jan 18, 2:22 AM CST | Cold Weather Advisory | FSD | 32 hr |
| Jan 20, 1:23 PM CST | Extreme Cold Watch | FSD | 37 hr |
| Jan 20, 1:23 PM CST | Winter Weather Advisory | FSD | 29 hr |
| Jan 21, 10:13 AM CST | Blizzard Warning | FSD | 8 hr |
| Jan 22, 2:28 AM CST | Extreme Cold Warning | FSD | 33 hr |
| Jan 23, 2:17 AM CST | Cold Weather Advisory | FSD | 31 hr |
| Jan 25, 2:13 AM CST | Cold Weather Advisory | FSD | 32 hr |
| Feb 17, 2:43 AM CST | Wind Advisory | FSD | 36 hr |
| Feb 18, 4:37 AM CST | High Wind Warning | FSD | 7 hr |
| Feb 18, 4:37 AM CST | Wind Advisory | FSD | 10 hr |
| Feb 18, 8:13 AM CST | Winter Weather Advisory | FSD | 5 hr |
| Feb 27, 9:48 PM CST | Winter Weather Advisory | FSD | 17 hr |
| Feb 28, 5:35 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 3, 11:43 PM CST | Dense Fog Advisory | FSD | 8 hr |
| Mar 4, 8:30 AM CST | Dense Fog Advisory | FSD | 3 hr |
| Mar 5, 1:55 PM CST | Winter Weather Advisory | FSD | 41 hr |
| Mar 10, 11:57 PM CDT | High Wind Watch | FSD | 21 hr |
| Mar 11, 1:59 PM CDT | High Wind Warning | FSD | 41 hr |
| Mar 12, 2:35 PM CDT | Winter Storm Watch | FSD | 47 hr |
| Mar 13, 9:20 PM CDT | Blizzard Warning | FSD | 56 hr |
| Mar 15, 9:49 AM CDT | Mesoscale Discussion | SPC | 6 hr |
| Mar 15, 2:31 PM CDT | Cold Weather Advisory | FSD | 20 hr |
| Mar 26, 1:57 PM CDT | Fire Weather Watch | FSD | 21 hr |
| Mar 27, 11:17 AM CDT | Red Flag Warning | FSD | 34 hr |
| Mar 31, 2:02 PM CDT | Winter Weather Advisory | FSD | 48 hr |
| Apr 2, 1:51 PM CDT | Winter Weather Advisory | FSD | 48 hr |
| Apr 15, 12:28 PM CDT | Fire Weather Watch | FSD | 9 hr |
| Apr 15, 12:28 PM CDT | Red Flag Warning | FSD | 32 hr |
| Apr 19, 12:59 PM CDT | Fire Weather Watch | FSD | 13 hr |
| Apr 20, 1:35 AM CDT | Red Flag Warning | FSD | 18 hr |
| Apr 21, 12:54 PM CDT | Red Flag Warning | FSD | 31 hr |
| Apr 23, 2:13 AM CDT | Red Flag Warning | FSD | 18 hr |
| Apr 30, 1:36 PM CDT | Frost Advisory | FSD | 18 hr |
| May 1, 1:06 PM CDT | Freeze Warning | FSD | 19 hr |
| May 5, 1:19 PM CDT | Freeze Warning | FSD | 18 hr |
| May 9, 1:36 PM CDT | Frost Advisory | FSD | 19 hr |
| May 10, 1:08 PM CDT | Frost Advisory | FSD | 19 hr |
| May 11, 3:07 PM CDT | Red Flag Warning | FSD | 30 hr |
| May 13, 1:54 PM CDT | Fire Weather Watch | FSD | 24 hr |
| May 13, 1:54 PM CDT | Red Flag Warning | FSD | 30 hr |
| May 14, 1:57 PM CDT | Red Flag Warning | FSD | 28 hr |
| May 19, 2:43 AM CDT | Frost Advisory | FSD | 29 hr |
| May 24, 3:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| May 24, 4:53 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 24, 6:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| May 24, 8:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 4, 3:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 9, 8:36 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 15, 3:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jun 15, 10:48 PM CDT | Severe Thunderstorm Warning | FSD | 27 min |
| Jun 16, 12:40 PM CDT | Wind Advisory | FSD | 31 hr |
| Jun 23, 1:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jun 27, 12:59 AM CDT | Heat Advisory | FSD | 68 hr |
| Jun 29, 6:33 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 29, 8:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 1, 12:03 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 1, 3:29 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 2, 5:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 2, 6:08 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 2, 7:13 PM CDT | Severe Thunderstorm Warning | FSD | 47 min |
| Jul 2, 8:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 4, 5:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 7, 8:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 12:58 AM CDT | Mesoscale Discussion | SPC | 62 min |
| Jul 10, 3:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 1:31 AM CDT | Heat Advisory | FSD | 19 hr |
| Jul 24, 11:23 AM CDT | Heat Advisory | FSD | 29 hr |
| Jul 24, 11:24 PM CDT | Extreme Heat Warning | FSD | 46 hr |
| Jul 25, 7:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 25, 7:58 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 7, 5:23 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 20, 5:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 10, 11:51 PM CDT | Wind Advisory | FSD | 19 hr |
| Sep 11, 6:39 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Sep 11, 8:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Sep 19, 12:51 AM CDT | Dense Fog Advisory | FSD | 9 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 | 2 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 20 |
| Winter | |
| Blizzard Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 8 |
| Heat | |
| Extreme Heat Warning | 1 |
| Heat Advisory | 3 |
| Cold | |
| Extreme Cold Warning | 1 |
| Freeze Warning | 2 |
| Extreme Cold Watch | 1 |
| Cold Weather Advisory | 4 |
| Frost Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 1 |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 8 |
| Fire Weather Watch | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive2025
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.