Alert archive / Iowa / Lee County
Weather alerts in Lee County, Iowa, 2026
140 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Lee County and its neighbors
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Alerts
- 140
- Warnings
- 50
- Watches
- 33
- Advisories
- 22
- Busiest month
- August32 alerts
- Busiest day
- June 11, 202610 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 4 tornado warnings covering Lee County in 2026 had a tornado report inside them; 3 of 4 tornado reports fell inside a warning, on average 42 minutes after it went out.
Lee County, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 1 | 75% | 4 | 75% | 42 min |
| Severe thunderstorm warnings | 24 | 12 | 50% | 9 | 67% | 17 min |
| Flash flood warnings | 6 | 3 | 50% | 5 | 40% | 99 min |
Each office's whole area, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Quad Cities, IA: tornado warnings | 93 | 25 | 73% | 49 | 65% | 22 min |
| NWS Quad Cities, IA: severe thunderstorm warnings | 290 | 168 | 42% | 599 | 80% | 25 min |
| NWS Quad Cities, IA: flash flood warnings | 50 | 33 | 34% | 61 | 89% | 103 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 6, 11:58 PM CST | Dense Fog Advisory | DVN | 12 hr |
| Jan 17, 1:51 PM CST | Cold Weather Advisory | DVN | 46 hr |
| Jan 21, 2:46 AM CST | Extreme Cold Watch | DVN | 31 hr |
| Jan 21, 2:46 AM CST | Wind Advisory | DVN | 21 hr |
| Jan 22, 2:38 AM CST | Extreme Cold Warning | DVN | 33 hr |
| Jan 22, 10:02 AM CST | Cold Weather Advisory | DVN | 50 hr |
| Jan 23, 1:26 PM CST | Winter Weather Advisory | DVN | 44 hr |
| Jan 25, 1:48 AM CST | Cold Weather Advisory | DVN | 34 hr |
| Feb 15, 7:30 AM CST | Dense Fog Advisory | DVN | 3 hr |
| Feb 17, 2:31 PM CST | Fire Weather Watch | DVN | 10 hr |
| Feb 18, 12:30 AM CST | Red Flag Warning | DVN | 18 hr |
| Feb 26, 1:46 PM CST | Fire Weather Watch | DVN | 12 hr |
| Feb 27, 1:35 AM CST | Red Flag Warning | DVN | 16 hr |
| Mar 4, 8:40 PM CST | Dense Fog Advisory | DVN | 12 hr |
| Mar 6, 8:18 PM CST | Tornado Watch | SPC | 6 hr |
| Mar 10, 1:53 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 10, 3:57 PM CDT | Tornado Watch | SPC | 10 hr |
| Mar 10, 5:41 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 10, 7:51 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Mar 10, 8:22 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Mar 10, 8:41 PM CDT | Tornado Warning | DVN | 64 min |
| Mar 10, 9:36 PM CDT | Severe Thunderstorm Warning | DVN | 30 min |
| Mar 10, 10:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Mar 12, 2:34 AM CDT | Wind Advisory | DVN | 33 hr |
| Mar 14, 2:00 AM CDT | High Wind Watch | DVN | 11 hr |
| Mar 14, 12:33 PM CDT | Blizzard Warning | DVN | 48 hr |
| Mar 14, 12:33 PM CDT | High Wind Warning | DVN | 41 hr |
| Mar 15, 1:18 PM CDT | Winter Weather Advisory | DVN | 24 hr |
| Mar 16, 1:05 PM CDT | Winter Weather Advisory | DVN | 11 hr |
| Mar 26, 4:15 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Mar 26, 8:40 PM CDT | Special Weather Statement | DVN | 50 min |
| Mar 26, 8:56 PM CDT | Severe Thunderstorm Warning | DVN | 49 min |
| Mar 27, 11:59 AM CDT | Red Flag Warning | DVN | 33 hr |
| Apr 2, 2:50 AM CDT | Wind Advisory | DVN | 16 hr |
| Apr 2, 12:28 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 2, 1:43 PM CDT | Tornado Watch | SPC | 8 hr |
| Apr 2, 3:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Apr 3, 1:26 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 3, 2:20 PM CDT | Tornado Watch | SPC | 6 hr |
| Apr 10, 11:38 AM CDT | River Flood Watch | DVN | 6 days |
| Apr 11, 11:19 AM CDT | River Flood Warning | DVN | 20 days |
| Apr 15, 3:40 PM CDT | Tornado Watch | SPC | 6 hr |
| Apr 15, 6:15 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 15, 8:13 PM CDT | Tornado Warning | DVN | 47 min |
| Apr 17, 12:40 PM CDT | Tornado Watch | SPC | 9 hr |
| Apr 17, 12:46 PM CDT | Flood Watch | DVN | 12 hr |
| Apr 17, 4:23 PM CDT | Severe Thunderstorm Warning | DVN | 54 min |
| Apr 17, 5:19 PM CDT | Severe Thunderstorm Warning | DVN | 41 min |
| Apr 17, 5:27 PM CDT | Severe Thunderstorm Warning | DVN | 63 min |
| Apr 17, 5:47 PM CDT | Tornado Warning | DVN | 43 min |
| Apr 17, 5:55 PM CDT | Severe Thunderstorm Warning | DVN | 50 min |
| Apr 17, 6:31 PM CDT | Severe Thunderstorm Warning | DVN | 59 min |
| Apr 19, 2:10 AM CDT | Freeze Warning | DVN | 30 hr |
| Apr 23, 8:59 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Apr 27, 9:54 AM CDT | Flash Flood Warning | DVN | 104 min |
| May 4, 6:22 PM CDT | Special Weather Statement | DVN | 38 min |
| May 4, 6:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| May 4, 7:10 PM CDT | Special Weather Statement | DVN | 65 min |
| May 4, 7:36 PM CDT | Severe Thunderstorm Warning | DVN | 54 min |
| May 18, 3:15 AM CDT | Special Weather Statement | DVN | 45 min |
| May 18, 6:51 AM CDT | Mesoscale Discussion | SPC | 84 min |
| May 18, 9:35 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 19, 12:44 AM CDT | Special Weather Statement | DVN | 46 min |
| Jun 7, 11:46 AM CDT | Flood Watch | DVN | 31 hr |
| Jun 9, 2:00 AM CDT | Heat Advisory | DVN | 18 hr |
| Jun 10, 7:43 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 10:58 AM CDT | Flood Watch | DVN | 32 hr |
| Jun 10, 11:09 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 4:01 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 10, 7:30 PM CDT | Severe Thunderstorm Warning | DVN | 75 min |
| Jun 10, 8:19 PM CDT | Flash Flood Warning | DVN | 5 hr |
| Jun 11, 7:31 AM CDT | Tornado Watch | SPC | 7 hr |
| Jun 11, 9:21 AM CDT | River Flood Warning | DVN | 3 days |
| Jun 11, 9:53 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 11, 11:21 AM CDT | Severe Thunderstorm Warning | DVN | 54 min |
| Jun 11, 1:08 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 11, 1:57 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 11, 3:07 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 11, 3:09 PM CDT | Tornado Warning | DVN | 51 min |
| Jun 16, 1:36 PM CDT | Flood Watch | DVN | 29 hr |
| Jun 17, 3:55 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 17, 7:57 AM CDT | Severe Thunderstorm Warning | DVN | 63 min |
| Jun 17, 8:06 AM CDT | Severe Thunderstorm Warning | DVN | 39 min |
| Jun 17, 8:16 AM CDT | Mesoscale Discussion | SPC | 59 min |
| Jun 17, 8:43 AM CDT | Severe Thunderstorm Warning | DVN | 62 min |
| Jun 17, 3:29 PM CDT | Severe Thunderstorm Warning | DVN | 61 min |
| Jun 17, 8:41 PM CDT | River Flood Warning | DVN | 12 hr |
| Jun 20, 2:13 AM CDT | Flood Watch | DVN | 35 hr |
| Jun 27, 1:28 AM CDT | Extreme Heat Watch | DVN | 24 hr |
| Jun 27, 1:24 PM CDT | Extreme Heat Warning | DVN | 6 days |
| Jul 3, 9:31 PM CDT | Severe Thunderstorm Warning | DVN | 59 min |
| Jul 10, 2:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 17, 12:32 PM CDT | Heat Advisory | DVN | 30 hr |
| Jul 19, 11:56 AM CDT | Heat Advisory | DVN | 32 hr |
| Jul 20, 11:36 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 20, 3:03 PM CDT | Tornado Watch | SPC | 7 hr |
| Jul 20, 8:17 PM CDT | Severe Thunderstorm Warning | DVN | 58 min |
| Jul 24, 1:38 AM CDT | Extreme Heat Watch | DVN | 59 hr |
| Jul 25, 2:49 AM CDT | Extreme Heat Warning | DVN | 67 hr |
| Jul 27, 12:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Aug 5, 2:03 AM CDT | Flood Watch | DVN | 16 hr |
| Aug 7, 1:40 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 7, 8:28 PM CDT | Severe Thunderstorm Warning | DVN | 62 min |
| Aug 7, 8:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Aug 7, 9:28 PM CDT | Severe Thunderstorm Warning | DVN | 62 min |
| Aug 7, 10:01 PM CDT | Severe Thunderstorm Warning | DVN | 74 min |
| Aug 9, 1:41 AM CDT | Heat Advisory | DVN | 18 hr |
| Aug 9, 8:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 1:57 PM CDT | Heat Advisory | DVN | 30 hr |
| Aug 12, 1:18 AM CDT | Heat Advisory | DVN | 12 hr |
| Aug 12, 7:27 AM CDT | Severe Thunderstorm Warning | DVN | 63 min |
| Aug 12, 7:54 AM CDT | Severe Thunderstorm Warning | DVN | 36 min |
| Aug 12, 8:20 AM CDT | Severe Thunderstorm Warning | DVN | 55 min |
| Aug 13, 2:22 AM CDT | Flood Watch | DVN | 56 hr |
| Aug 13, 2:35 AM CDT | Dense Fog Advisory | DVN | 6 hr |
| Aug 13, 5:47 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 13, 10:28 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 13, 11:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Aug 14, 2:59 PM CDT | River Flood Watch | DVN | 18 hr |
| Aug 14, 11:11 PM CDT | Severe Thunderstorm Warning | DVN | 64 min |
| Aug 14, 11:42 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 15, 12:58 AM CDT | Flash Flood Warning | DVN | 6 hr |
| Aug 15, 3:19 AM CDT | Flash Flood Warning | DVN | 5 hr |
| Aug 15, 8:33 AM CDT | Areal Flood Warning | DVN | 6 hr |
| Aug 15, 9:15 AM CDT | River Flood Warning | DVN | 57 hr |
| Aug 15, 4:02 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Aug 15, 5:31 PM CDT | Special Weather Statement | DVN | 29 min |
| Aug 15, 5:41 PM CDT | Severe Thunderstorm Warning | DVN | 34 min |
| Aug 19, 4:23 PM CDT | Special Weather Statement | DVN | 52 min |
| Aug 19, 4:36 PM CDT | Flash Flood Warning | DVN | 2 hr |
| Aug 19, 5:12 PM CDT | Special Weather Statement | DVN | 63 min |
| Aug 30, 1:04 PM CDT | Heat Advisory | DVN | 6 days |
| Sep 2, 2:02 AM CDT | Extreme Heat Warning | DVN | 4 days |
| Sep 11, 2:07 AM CDT | Dense Fog Advisory | DVN | 8 hr |
| Sep 15, 2:35 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Sep 15, 10:28 PM CDT | Flash Flood Warning | DVN | 6 hr |
| Sep 16, 12:32 PM CDT | Flood Watch | DVN | 20 hr |
| Sep 16, 9:26 PM CDT | Dense Fog Advisory | DVN | 12 hr |
| Sep 19, 10:12 PM CDT | River Flood Watch | DVN | 6 days |
| Sep 21, 11:47 AM CDT | River Flood Warning | DVN | 5 days |
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.