Alert archive / Iowa / Bremer County
Weather alerts in Bremer County, Iowa, 2025
116 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Bremer County and its neighbors
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 116
- Warnings
- 30
- Watches
- 19
- Advisories
- 37
- Busiest month
- June18 alerts
- Busiest day
- June 26, 20256 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Bremer County, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 9 | 6 | 33% | 12 | 83% | 19 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Des Moines, IA: tornado warnings | 24 | 1 | 96% | 5 | 20% | 0 min |
| NWS Des Moines, IA: severe thunderstorm warnings | 254 | 125 | 51% | 349 | 78% | 23 min |
| NWS Des Moines, IA: flash flood warnings | 18 | 7 | 61% | 11 | 82% | 79 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, 2:37 PM CST | Cold Weather Advisory | DMX | 45 hr |
| Jan 19, 2:48 AM CST | Cold Weather Advisory | DMX | 32 hr |
| Jan 20, 2:46 AM CST | Cold Weather Advisory | DMX | 33 hr |
| Jan 20, 2:46 AM CST | Extreme Cold Warning | DMX | 33 hr |
| Feb 4, 1:55 PM CST | Winter Weather Advisory | DMX | 34 hr |
| Feb 11, 2:50 AM CST | Winter Weather Advisory | DMX | 42 hr |
| Feb 12, 2:32 AM CST | Cold Weather Advisory | DMX | 30 hr |
| Feb 14, 12:11 PM CST | Winter Weather Advisory | DMX | 26 hr |
| Feb 16, 3:18 AM CST | Cold Weather Advisory | DMX | 42 hr |
| Feb 16, 3:18 AM CST | Extreme Cold Watch | DMX | 24 hr |
| Feb 17, 3:44 AM CST | Extreme Cold Warning | DMX | 32 hr |
| Feb 18, 3:24 AM CST | Cold Weather Advisory | DMX | 33 hr |
| Feb 19, 3:37 AM CST | Cold Weather Advisory | DMX | 29 hr |
| Feb 27, 2:09 PM CST | Red Flag Warning | DMX | 28 hr |
| Feb 27, 2:09 PM CST | Wind Advisory | DMX | 28 hr |
| Feb 28, 2:12 PM CST | High Wind Warning | DMX | 4 hr |
| Mar 3, 2:56 AM CST | Winter Storm Watch | DMX | 24 hr |
| Mar 3, 2:39 PM CST | High Wind Watch | DMX | 12 hr |
| Mar 4, 2:36 AM CST | High Wind Warning | DMX | 36 hr |
| Mar 4, 11:51 AM CST | Blizzard Warning | DMX | 27 hr |
| Mar 4, 12:40 PM CST | High Wind Warning | DMX | 29 hr |
| Mar 4, 2:50 PM CST | Winter Weather Advisory | DMX | 27 hr |
| Mar 14, 3:14 AM CDT | Red Flag Warning | DMX | 17 hr |
| Mar 14, 3:19 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 14, 5:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Mar 14, 7:11 PM CDT | Severe Thunderstorm Warning | DMX | 64 min |
| Mar 14, 8:06 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Mar 17, 2:50 AM CDT | Red Flag Warning | DMX | 17 hr |
| Mar 17, 3:28 AM CDT | Winter Storm Watch | DMX | 36 hr |
| Mar 17, 2:50 PM CDT | High Wind Watch | DMX | 24 hr |
| Mar 18, 4:10 AM CDT | High Wind Warning | DMX | 42 hr |
| Mar 19, 4:37 AM CDT | Mesoscale Discussion | SPC | 113 min |
| Mar 22, 2:22 PM CDT | Wind Advisory | DMX | 29 hr |
| Apr 2, 3:05 AM CDT | Wind Advisory | DMX | 16 hr |
| Apr 18, 12:42 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 18, 3:45 AM CDT | Severe Thunderstorm Warning | DMX | 45 min |
| Apr 18, 5:05 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 18, 5:09 AM CDT | Severe Thunderstorm Warning | DMX | 34 min |
| Apr 23, 9:09 PM CDT | Severe Thunderstorm Warning | DMX | 51 min |
| Apr 28, 8:51 AM CDT | Severe Thunderstorm Warning | DMX | 24 min |
| Apr 28, 2:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 28, 11:10 PM CDT | Special Weather Statement | DMX | 50 min |
| Jun 11, 1:56 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 11, 2:53 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 11, 4:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 11, 6:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 11, 11:26 PM CDT | Special Weather Statement | DMX | 49 min |
| Jun 16, 9:53 PM CDT | River Flood Warning | DMX | 4 days |
| Jun 18, 1:43 PM CDT | Extreme Heat Watch | DMX | 38 hr |
| Jun 20, 12:44 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 20, 3:21 AM CDT | Heat Advisory | DMX | 4 days |
| Jun 20, 9:48 PM CDT | River Flood Warning | DMX | 45 hr |
| Jun 23, 12:29 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 23, 4:39 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 26, 10:09 AM CDT | River Flood Watch | DMX | 6 hr |
| Jun 26, 12:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 26, 1:44 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 3:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 26, 4:31 PM CDT | River Flood Warning | DMX | 50 hr |
| Jun 26, 5:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 3, 2:18 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 10, 12:55 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 11, 1:13 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 19, 1:54 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 19, 5:05 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 22, 2:02 PM CDT | Heat Advisory | DMX | 30 hr |
| Jul 24, 9:54 AM CDT | River Flood Watch | DMX | 20 hr |
| Jul 25, 6:05 AM CDT | River Flood Warning | DMX | 70 hr |
| Jul 27, 4:09 AM CDT | Dense Fog Advisory | DMX | 5 hr |
| Jul 27, 2:43 PM CDT | Heat Advisory | DMX | 29 hr |
| Jul 27, 9:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 28, 12:13 AM CDT | Severe Thunderstorm Warning | DMX | 47 min |
| Jul 28, 1:00 AM CDT | Special Weather Statement | DMX | 30 min |
| Jul 28, 9:39 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 28, 10:07 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 29, 12:47 AM CDT | Severe Thunderstorm Warning | DMX | 58 min |
| Jul 29, 12:53 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Jul 29, 11:39 AM CDT | River Flood Warning | DMX | 5 days |
| Aug 8, 3:18 PM CDT | Flood Watch | DMX | 45 hr |
| Aug 9, 7:29 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 15, 11:51 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Aug 15, 12:30 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 15, 1:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Aug 15, 2:51 PM CDT | Heat Advisory | DMX | 29 hr |
| Aug 15, 2:59 PM CDT | Severe Thunderstorm Warning | DMX | 61 min |
| Aug 15, 3:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Aug 17, 3:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Aug 17, 6:43 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 19, 1:32 AM CDT | Dense Fog Advisory | DMX | 7 hr |
| Aug 19, 9:50 AM CDT | River Flood Warning | DMX | 3 days |
| Sep 16, 6:28 PM CDT | Severe Thunderstorm Warning | DMX | 12 min |
| Oct 20, 2:26 PM CDT | Wind Advisory | DMX | 28 hr |
| Oct 22, 2:20 AM CDT | Frost Advisory | DMX | 31 hr |
| Oct 22, 2:31 PM CDT | Freeze Warning | DMX | 18 hr |
| Oct 30, 1:33 AM CDT | Dense Fog Advisory | DMX | 9 hr |
| Nov 2, 1:16 AM CST | Dense Fog Advisory | DMX | 8 hr |
| Nov 23, 2:30 PM CST | Dense Fog Advisory | DMX | 21 hr |
| Nov 24, 2:32 PM CST | Wind Advisory | DMX | 44 hr |
| Nov 25, 12:21 AM CST | Dense Fog Advisory | DMX | 10 hr |
| Nov 27, 3:21 AM CST | Winter Storm Watch | DMX | 23 hr |
| Nov 27, 2:19 PM CST | Winter Storm Warning | DMX | 60 hr |
| Nov 30, 2:23 AM CST | Winter Weather Advisory | DMX | 10 hr |
| Dec 5, 1:47 PM CST | Winter Storm Warning | DMX | 37 hr |
| Dec 5, 1:47 PM CST | Winter Weather Advisory | DMX | 37 hr |
| Dec 8, 2:24 PM CST | Winter Storm Watch | DMX | 23 hr |
| Dec 9, 2:59 AM CST | Wind Advisory | DMX | 30 hr |
| Dec 9, 1:31 PM CST | Winter Weather Advisory | DMX | 16 hr |
| Dec 12, 2:20 PM CST | Cold Weather Advisory | DMX | 44 hr |
| Dec 17, 2:58 AM CST | Wind Advisory | DMX | 45 hr |
| Dec 18, 3:59 PM CST | Blizzard Warning | DMX | 5 hr |
| Dec 24, 4:34 PM CST | Dense Fog Advisory | DMX | 43 hr |
| Dec 26, 4:44 PM CST | Dense Fog Advisory | DMX | 40 hr |
| Dec 27, 2:36 PM CST | Winter Weather Advisory | DMX | 42 hr |
| Dec 27, 9:44 PM CST | Blizzard Warning | DMX | 35 hr |
| Dec 28, 5:53 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 29, 8:42 AM CST | Winter Weather Advisory | DMX | 3 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 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.