Alert archive / Minnesota / Norman County
Weather alerts in Norman County, Minnesota, 2026
121 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Norman County and its neighbors
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Alerts
- 121
- Warnings
- 35
- Watches
- 18
- Advisories
- 46
- Busiest month
- July22 alerts
- Busiest day
- June 10, 20268 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 3 tornado warnings covering Norman County in 2026 had a tornado report inside them.
Norman County, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 1 | 67% | 0 | ||
| Severe thunderstorm warnings | 12 | 8 | 33% | 3 | 100% | 5 min |
| 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 Grand Forks, ND: tornado warnings | 30 | 6 | 80% | 16 | 50% | 14 min |
| NWS Grand Forks, ND: severe thunderstorm warnings | 201 | 131 | 35% | 251 | 86% | 26 min |
| NWS Grand Forks, ND: flash flood warnings | 6 | 3 | 50% | 8 | 63% | 15 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, 2:53 AM CST | Winter Weather Advisory | FGF | 18 hr |
| Jan 4, 7:55 PM CST | Dense Fog Advisory | FGF | 43 hr |
| Jan 15, 1:42 PM CST | Winter Weather Advisory | FGF | 40 hr |
| Jan 16, 1:26 PM CST | Cold Weather Advisory | FGF | 29 hr |
| Jan 16, 1:26 PM CST | Winter Storm Watch | FGF | 23 hr |
| Jan 16, 6:01 PM CST | Blizzard Warning | FGF | 18 hr |
| Jan 17, 12:43 PM CST | Blizzard Warning | FGF | 35 hr |
| Jan 17, 12:45 PM CST | Cold Weather Advisory | FGF | 47 hr |
| Jan 18, 8:48 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 19, 12:00 PM CST | Cold Weather Advisory | FGF | 22 hr |
| Jan 20, 1:07 PM CST | Cold Weather Advisory | FGF | 47 hr |
| Jan 20, 1:07 PM CST | Extreme Cold Watch | FGF | 48 hr |
| Jan 20, 1:07 PM CST | Extreme Cold Warning | FGF | 6 days |
| Jan 20, 1:07 PM CST | Winter Weather Advisory | FGF | 31 hr |
| Jan 22, 1:12 PM CST | Cold Weather Advisory | FGF | 4 days |
| Jan 26, 1:34 PM CST | Winter Weather Advisory | FGF | 8 hr |
| Jan 27, 1:58 PM CST | Cold Weather Advisory | FGF | 19 hr |
| Jan 29, 1:32 PM CST | Cold Weather Advisory | FGF | 20 hr |
| Jan 30, 1:34 PM CST | Cold Weather Advisory | FGF | 19 hr |
| Jan 30, 1:44 PM CST | Winter Weather Advisory | FGF | 51 hr |
| Feb 5, 2:15 PM CST | Wind Advisory | FGF | 18 hr |
| Feb 12, 10:41 PM CST | Dense Fog Advisory | FGF | 12 hr |
| Feb 14, 6:09 PM CST | Dense Fog Advisory | FGF | 20 hr |
| Feb 15, 1:32 PM CST | Winter Storm Watch | FGF | 43 hr |
| Feb 17, 8:57 AM CST | Winter Storm Warning | FGF | 39 hr |
| Feb 17, 8:57 AM CST | Winter Weather Advisory | FGF | 39 hr |
| Feb 23, 12:56 PM CST | Winter Weather Advisory | FGF | 21 hr |
| Feb 26, 12:26 PM CST | Wind Advisory | FGF | 31 hr |
| Feb 27, 2:08 PM CST | Snow Squall Warning | FGF | 52 min |
| Mar 3, 9:54 AM CST | Dense Fog Advisory | FGF | 2 hr |
| Mar 3, 7:18 PM CST | Dense Fog Advisory | FGF | 20 hr |
| Mar 4, 6:00 PM CST | Dense Fog Advisory | FGF | 24 hr |
| Mar 5, 6:46 AM CST | Winter Weather Advisory | FGF | 4 hr |
| Mar 5, 12:04 PM CST | Winter Weather Advisory | FGF | 26 hr |
| Mar 11, 1:49 PM CDT | High Wind Warning | FGF | 38 hr |
| Mar 11, 1:49 PM CDT | Winter Storm Watch | FGF | 14 hr |
| Mar 12, 4:35 AM CDT | Winter Weather Advisory | FGF | 26 hr |
| Mar 12, 4:50 PM CDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 17, 2:12 AM CDT | Winter Weather Advisory | FGF | 17 hr |
| Mar 26, 1:55 AM CDT | Winter Weather Advisory | FGF | 3 hr |
| Mar 31, 2:31 PM CDT | Winter Weather Advisory | FGF | 63 hr |
| Apr 1, 1:38 PM CDT | Winter Storm Watch | FGF | 23 hr |
| Apr 2, 12:52 PM CDT | Winter Storm Warning | FGF | 54 hr |
| Apr 11, 9:26 PM CDT | Dense Fog Advisory | FGF | 17 hr |
| Apr 15, 3:03 AM CDT | Dense Fog Advisory | FGF | 6 hr |
| Apr 19, 1:06 PM CDT | Fire Weather Watch | FGF | 13 hr |
| Apr 20, 2:20 AM CDT | Red Flag Warning | FGF | 18 hr |
| Apr 23, 2:51 AM CDT | Red Flag Warning | FGF | 16 hr |
| Apr 23, 2:54 AM CDT | Wind Advisory | FGF | 18 hr |
| Apr 27, 3:35 AM CDT | Wind Advisory | FGF | 15 hr |
| May 8, 3:20 AM CDT | Red Flag Warning | FGF | 17 hr |
| May 9, 11:31 AM CDT | Freeze Warning | FGF | 21 hr |
| May 10, 11:32 AM CDT | Freeze Warning | FGF | 21 hr |
| May 11, 10:56 AM CDT | Red Flag Warning | FGF | 11 hr |
| May 11, 1:02 PM CDT | Wind Advisory | FGF | 31 hr |
| May 11, 1:55 PM CDT | Red Flag Warning | FGF | 31 hr |
| May 12, 4:01 PM CDT | Blowing Dust Advisory | FGF | 4 hr |
| May 13, 3:14 AM CDT | Fire Weather Watch | FGF | 33 hr |
| May 13, 2:14 PM CDT | Wind Advisory | FGF | 32 hr |
| May 13, 2:22 PM CDT | Red Flag Warning | FGF | 55 hr |
| May 14, 9:32 AM CDT | Blowing Dust Advisory | FGF | 14 hr |
| May 14, 10:41 AM CDT | Blowing Dust Warning | FGF | 8 hr |
| May 14, 9:41 PM CDT | Wind Advisory | FGF | 23 hr |
| May 19, 1:03 PM CDT | Freeze Warning | FGF | 20 hr |
| May 26, 3:06 PM CDT | Severe Thunderstorm Warning | FGF | 39 min |
| May 26, 3:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 4:02 PM CDT | Severe Thunderstorm Warning | FGF | 29 min |
| Jun 3, 4:02 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 9, 11:10 AM CDT | Heat Advisory | FGF | 9 hr |
| Jun 9, 8:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 9, 9:05 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 9, 11:19 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 10, 1:42 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 1:53 AM CDT | Severe Thunderstorm Warning | FGF | 67 min |
| Jun 10, 2:17 AM CDT | Tornado Warning | FGF | 26 min |
| Jun 10, 12:35 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jun 10, 12:50 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 19, 12:35 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jun 23, 1:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jun 28, 1:00 PM CDT | Heat Advisory | FGF | 27 hr |
| Jun 29, 5:58 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 29, 2:00 PM CDT | Tornado Watch | SPC | 10 hr |
| Jun 29, 7:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 29, 8:42 PM CDT | Severe Thunderstorm Warning | FGF | 42 min |
| Jun 29, 9:02 PM CDT | Tornado Warning | FGF | 28 min |
| Jun 29, 9:29 PM CDT | Severe Thunderstorm Warning | FGF | 61 min |
| Jul 4, 3:07 AM CDT | Special Weather Statement | FGF | 38 min |
| Jul 6, 1:11 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 6, 1:40 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 6, 6:01 PM CDT | Severe Thunderstorm Warning | FGF | 59 min |
| Jul 6, 6:02 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jul 6, 6:15 PM CDT | Areal Flood Advisory | FGF | 3 hr |
| Jul 6, 6:19 PM CDT | Tornado Warning | FGF | 41 min |
| Jul 6, 6:49 PM CDT | Severe Thunderstorm Warning | FGF | 56 min |
| Jul 9, 1:26 PM CDT | Extreme Heat Watch | FGF | 48 hr |
| Jul 10, 12:35 PM CDT | Heat Advisory | FGF | 32 hr |
| Jul 11, 1:44 PM CDT | Extreme Heat Warning | FGF | 59 hr |
| Jul 14, 12:55 AM CDT | Extreme Heat Warning | FGF | 21 hr |
| Jul 14, 1:51 PM CDT | Heat Advisory | FGF | 56 hr |
| Jul 19, 11:42 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jul 24, 1:04 PM CDT | Heat Advisory | FGF | 56 hr |
| Jul 24, 2:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 24, 3:34 PM CDT | Tornado Watch | SPC | 9 hr |
| Jul 24, 5:32 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jul 24, 7:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jul 25, 11:50 AM CDT | Extreme Heat Warning | FGF | 35 hr |
| Jul 28, 2:05 PM CDT | Heat Advisory | FGF | 31 hr |
| Jul 30, 1:37 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Aug 3, 5:25 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 5:15 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 5:54 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 24, 5:53 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 3, 11:46 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 3, 12:12 PM CDT | Severe Thunderstorm Watch | SPC | 11 hr |
| Sep 3, 12:53 PM CDT | Severe Thunderstorm Warning | FGF | 67 min |
| Sep 3, 1:49 PM CDT | Severe Thunderstorm Warning | FGF | 56 min |
| Sep 3, 2:39 PM CDT | Severe Thunderstorm Warning | FGF | 66 min |
| Sep 3, 3:01 PM CDT | Severe Thunderstorm Warning | FGF | 44 min |
| Sep 3, 3:14 PM CDT | Severe Thunderstorm Warning | FGF | 61 min |
| Sep 3, 3:17 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Sep 17, 4:11 AM CDT | Dense Fog Advisory | FGF | 8 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
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.