Alert archive / Iowa / Winnebago County
Weather alerts in Winnebago County, Iowa, 2018
139 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Winnebago County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 139
- Warnings
- 40
- Watches
- 24
- Advisories
- 39
- Busiest month
- June25 alerts
- Busiest day
- July 25, 20187 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 Winnebago County in 2018 had a tornado report inside them.
Winnebago County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 1 | 67% | 0 | ||
| Severe thunderstorm warnings | 20 | 11 | 45% | 6 | 100% | 14 min |
| Flash flood warnings | 2 | 2 | 0% | 1 | 100% | 1 min |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Des Moines, IA: tornado warnings | 72 | 23 | 68% | 69 | 55% | 15 min |
| NWS Des Moines, IA: severe thunderstorm warnings | 308 | 143 | 54% | 427 | 74% | 22 min |
| NWS Des Moines, IA: flash flood warnings | 39 | 20 | 49% | 70 | 74% | 86 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 3, 3:46 AM CST | Wind Chill Advisory | DMX | 30 hr |
| Jan 5, 4:04 PM CST | Wind Chill Advisory | DMX | 18 hr |
| Jan 9, 3:57 AM CST | Winter Storm Watch | DMX | 34 hr |
| Jan 10, 2:08 PM CST | Winter Storm Warning | DMX | 24 hr |
| Jan 10, 2:08 PM CST | Winter Weather Advisory | DMX | 28 hr |
| Jan 11, 2:24 PM CST | Wind Chill Advisory | DMX | 20 hr |
| Jan 12, 3:46 PM CST | Wind Chill Advisory | DMX | 18 hr |
| Jan 14, 3:47 AM CST | Wind Chill Advisory | DMX | 56 hr |
| Jan 14, 3:10 PM CST | Wind Chill Warning | DMX | 43 hr |
| Jan 19, 3:08 PM CST | Winter Storm Watch | DMX | 38 hr |
| Jan 21, 4:47 AM CST | Blizzard Warning | DMX | 43 hr |
| Jan 22, 9:20 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 24, 3:28 PM CST | Dense Fog Advisory | DMX | 21 hr |
| Feb 4, 2:32 PM CST | Winter Weather Advisory | DMX | 28 hr |
| Feb 7, 2:23 PM CST | Winter Weather Advisory | DMX | 40 hr |
| Feb 18, 3:27 AM CST | Wind Advisory | DMX | 11 hr |
| Feb 18, 3:45 AM CST | Winter Weather Advisory | DMX | 56 hr |
| Feb 21, 3:42 PM CST | Winter Weather Advisory | DMX | 35 hr |
| Feb 22, 4:00 PM CST | Winter Storm Watch | DMX | 23 hr |
| Feb 23, 3:24 PM CST | Winter Weather Advisory | DMX | 30 hr |
| Feb 23, 11:11 PM CST | Dense Fog Advisory | DMX | 10 hr |
| Mar 4, 3:35 PM CST | Winter Weather Advisory | DMX | 50 hr |
| Mar 22, 3:48 AM CDT | Winter Storm Watch | DMX | 24 hr |
| Mar 23, 4:00 AM CDT | Winter Storm Warning | DMX | 39 hr |
| Mar 23, 8:02 PM CDT | Mesoscale Discussion | SPC | 6 hr |
| Mar 28, 2:51 AM CDT | Dense Fog Advisory | DMX | 9 hr |
| Mar 30, 3:19 PM CDT | Wind Advisory | DMX | 25 hr |
| Apr 2, 4:16 AM CDT | Winter Storm Watch | DMX | 10 hr |
| Apr 2, 2:00 PM CDT | Winter Storm Warning | DMX | 35 hr |
| Apr 7, 3:31 AM CDT | Winter Storm Watch | DMX | 12 hr |
| Apr 7, 3:05 PM CDT | Winter Weather Advisory | DMX | 40 hr |
| Apr 8, 3:48 PM CDT | Winter Storm Warning | DMX | 12 hr |
| Apr 12, 3:49 AM CDT | Winter Storm Watch | DMX | 36 hr |
| Apr 13, 3:32 AM CDT | Blizzard Warning | DMX | 48 hr |
| Apr 13, 8:44 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 13, 3:54 PM CDT | Winter Storm Warning | DMX | 20 hr |
| Apr 13, 3:54 PM CDT | Winter Weather Advisory | DMX | 48 hr |
| Apr 14, 10:06 AM CDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 16, 3:42 AM CDT | Winter Storm Watch | DMX | 24 hr |
| Apr 17, 3:54 AM CDT | Winter Storm Warning | DMX | 38 hr |
| Apr 17, 3:54 AM CDT | Winter Weather Advisory | DMX | 42 hr |
| Apr 18, 9:56 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 29, 3:26 AM CDT | Red Flag Warning | DMX | 18 hr |
| Apr 30, 3:18 AM CDT | Wind Advisory | DMX | 17 hr |
| May 1, 5:11 PM CDT | Severe Thunderstorm Warning | DMX | 32 min |
| May 1, 5:31 PM CDT | Severe Thunderstorm Warning | DMX | 44 min |
| May 1, 5:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 1, 7:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| May 15, 1:52 AM CDT | Dense Fog Advisory | DMX | 7 hr |
| May 22, 2:05 AM CDT | Dense Fog Advisory | DMX | 7 hr |
| May 25, 4:11 PM CDT | Severe Thunderstorm Warning | DMX | 49 min |
| May 25, 5:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| May 25, 6:29 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 28, 5:41 PM CDT | Severe Thunderstorm Warning | DMX | 64 min |
| May 29, 1:43 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 29, 3:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 2, 9:01 AM CDT | High Wind Warning | DMX | 89 min |
| Jun 8, 3:38 AM CDT | Special Weather Statement | DMX | 52 min |
| Jun 8, 6:43 AM CDT | Special Weather Statement | DMX | 47 min |
| Jun 9, 1:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jun 9, 2:26 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 9, 2:52 PM CDT | Severe Thunderstorm Warning | DMX | 38 min |
| Jun 9, 2:57 PM CDT | Tornado Warning | DMX | 33 min |
| Jun 9, 3:20 PM CDT | Tornado Warning | DMX | 25 min |
| Jun 9, 3:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 12, 6:31 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 3:00 PM CDT | Heat Advisory | DMX | 4 days |
| Jun 15, 3:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 18, 1:34 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 20, 4:28 AM CDT | Flash Flood Watch | DMX | 23 hr |
| Jun 24, 6:12 PM CDT | Severe Thunderstorm Warning | DMX | 27 min |
| Jun 24, 6:29 PM CDT | Flash Flood Warning | DMX | 13 hr |
| Jun 25, 1:08 PM CDT | Flash Flood Watch | DMX | 14 hr |
| Jun 27, 3:29 PM CDT | Heat Advisory | DMX | 54 hr |
| Jun 28, 3:42 PM CDT | Excessive Heat Warning | DMX | 29 hr |
| Jun 30, 2:59 AM CDT | Flash Flood Watch | DMX | 27 hr |
| Jun 30, 12:40 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 30, 1:39 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 1:54 PM CDT | Severe Thunderstorm Warning | DMX | 51 min |
| Jun 30, 3:40 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 5:06 PM CDT | Severe Thunderstorm Warning | DMX | 24 min |
| Jul 3, 2:39 PM CDT | Heat Advisory | DMX | 29 hr |
| Jul 4, 10:27 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 4, 1:03 PM CDT | Severe Thunderstorm Warning | DMX | 42 min |
| Jul 11, 3:44 PM CDT | Heat Advisory | DMX | 28 hr |
| Jul 15, 6:08 AM CDT | Dense Fog Advisory | DMX | 3 hr |
| Jul 19, 1:27 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jul 25, 3:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 25, 4:05 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 25, 4:32 PM CDT | Special Weather Statement | DMX | 58 min |
| Jul 25, 4:39 PM CDT | Severe Thunderstorm Warning | DMX | 51 min |
| Jul 25, 5:44 PM CDT | Severe Thunderstorm Warning | DMX | 46 min |
| Jul 25, 6:18 PM CDT | Severe Thunderstorm Warning | DMX | 42 min |
| Jul 25, 6:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Aug 5, 3:46 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Aug 5, 4:10 AM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Aug 8, 4:23 AM CDT | Dense Fog Advisory | DMX | 5 hr |
| Aug 24, 3:07 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Aug 24, 4:48 PM CDT | Severe Thunderstorm Warning | DMX | 42 min |
| Aug 24, 5:20 PM CDT | Severe Thunderstorm Warning | DMX | 40 min |
| Aug 24, 7:02 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Aug 25, 3:19 AM CDT | Dense Fog Advisory | DMX | 6 hr |
| Aug 27, 2:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Aug 27, 2:57 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 27, 4:30 PM CDT | Severe Thunderstorm Warning | DMX | 45 min |
| Aug 27, 5:14 PM CDT | Severe Thunderstorm Warning | DMX | 46 min |
| Aug 28, 7:44 AM CDT | Severe Thunderstorm Warning | DMX | 46 min |
| Aug 28, 12:39 PM CDT | Severe Thunderstorm Warning | DMX | 36 min |
| Aug 28, 1:47 PM CDT | Special Weather Statement | DMX | 43 min |
| Sep 4, 3:33 AM CDT | Flash Flood Watch | DMX | 27 hr |
| Sep 4, 2:06 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 4, 3:35 PM CDT | Tornado Watch | SPC | 7 hr |
| Sep 4, 4:45 PM CDT | Tornado Warning | DMX | 30 min |
| Sep 4, 5:09 PM CDT | Flash Flood Warning | DMX | 6 hr |
| Sep 4, 6:28 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 17, 2:14 PM CDT | Special Weather Statement | DMX | 61 min |
| Sep 17, 3:05 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Sep 18, 8:25 AM CDT | Special Weather Statement | DMX | 50 min |
| Sep 19, 10:41 AM CDT | Flash Flood Watch | DMX | 25 hr |
| Sep 20, 8:51 AM CDT | Areal Flood Warning | DMX | 48 hr |
| Sep 20, 2:15 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 20, 3:11 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 20, 5:48 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Sep 20, 5:52 PM CDT | Severe Thunderstorm Warning | DMX | 38 min |
| Sep 20, 6:28 PM CDT | Severe Thunderstorm Warning | DMX | 47 min |
| Sep 28, 3:00 AM CDT | Frost Advisory | DMX | 29 hr |
| Oct 3, 12:07 PM CDT | Wind Advisory | DMX | 13 hr |
| Oct 7, 3:52 PM CDT | Flood Watch | DMX | 60 hr |
| Oct 11, 3:24 AM CDT | Freeze Warning | DMX | 29 hr |
| Oct 19, 7:30 PM CDT | Wind Advisory | DMX | 20 hr |
| Oct 27, 2:24 PM CDT | Wind Advisory | DMX | 23 hr |
| Nov 16, 3:49 AM CST | Winter Weather Advisory | DMX | 28 hr |
| Nov 29, 3:43 AM CST | Winter Storm Watch | DMX | 36 hr |
| Nov 30, 2:34 AM CST | Dense Fog Advisory | DMX | 7 hr |
| Nov 30, 3:18 PM CST | Winter Storm Warning | DMX | 45 hr |
| Dec 1, 11:33 AM CST | Mesoscale Discussion | SPC | 3 hr |
| Dec 12, 9:52 PM CST | Dense Fog Advisory | DMX | 10 hr |
| Dec 13, 7:07 PM CST | Dense Fog Advisory | DMX | 17 hr |
| Dec 28, 12:55 AM CST | Winter Weather Advisory | DMX | 11 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 archive20172019
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.