Alert archive / Iowa / Iowa County
Weather alerts in Iowa County, Iowa, 2013
129 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Iowa County and its neighbors
Each county as a circle sized by its count in 2013. Tap one for its archive.
- Alerts
- 129
- Warnings
- 36
- Watches
- 27
- Advisories
- 24
- Busiest month
- May36 alerts
- Busiest day
- October 4, 20139 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 2 tornado warnings covering Iowa County in 2013 had a tornado report inside them.
Iowa County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 1 | 50% | 0 | ||
| Severe thunderstorm warnings | 14 | 12 | 14% | 4 | 100% | 18 min |
| Flash flood warnings | 7 | 7 | 0% | 3 | 100% | 120 min |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Quad Cities, IA: tornado warnings | 23 | 6 | 74% | 17 | 65% | 10 min |
| NWS Quad Cities, IA: severe thunderstorm warnings | 131 | 91 | 31% | 316 | 79% | 20 min |
| NWS Quad Cities, IA: flash flood warnings | 33 | 20 | 39% | 71 | 89% | 128 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 10, 3:17 PM CST | Dense Fog Advisory | DVN | 27 hr |
| Jan 20, 3:06 PM CST | Wind Chill Advisory | DVN | 24 hr |
| Jan 26, 3:41 AM CST | Winter Storm Watch | DVN | 24 hr |
| Jan 26, 9:05 PM CST | Freezing Rain Advisory | DVN | 24 hr |
| Jan 27, 6:40 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 28, 7:52 AM CST | Dense Fog Advisory | DVN | 22 hr |
| Jan 28, 9:59 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 29, 3:39 AM CST | Winter Storm Watch | DVN | 12 hr |
| Jan 29, 3:18 PM CST | Winter Storm Warning | DVN | 27 hr |
| Jan 31, 3:32 AM CST | Wind Chill Advisory | DVN | 32 hr |
| Feb 10, 7:28 PM CST | Wind Advisory | DVN | 20 hr |
| Feb 19, 2:20 PM CST | Winter Storm Watch | DVN | 25 hr |
| Feb 20, 3:17 PM CST | Winter Storm Warning | DVN | 48 hr |
| Feb 25, 3:22 AM CST | Winter Storm Warning | DVN | 42 hr |
| Feb 25, 3:30 PM CST | Winter Weather Advisory | DVN | 45 hr |
| Mar 2, 3:39 PM CST | Winter Storm Watch | DVN | 37 hr |
| Mar 4, 4:13 AM CST | Winter Weather Advisory | DVN | 35 hr |
| Mar 10, 6:37 AM CDT | Dense Fog Advisory | DVN | 21 hr |
| Mar 10, 7:24 AM CDT | River Flood Warning | DVN | 10 days |
| Mar 18, 6:34 AM CDT | Winter Weather Advisory | DVN | 6 hr |
| Mar 31, 12:56 AM CDT | Dense Fog Advisory | DVN | 8 hr |
| Apr 9, 10:52 AM CDT | River Flood Warning | DVN | 8 days |
| Apr 9, 2:54 PM CDT | Flash Flood Watch | DVN | 32 hr |
| Apr 9, 7:37 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Apr 16, 3:32 PM CDT | Flash Flood Watch | DVN | 45 hr |
| Apr 17, 9:14 AM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Apr 17, 9:16 AM CDT | Severe Thunderstorm Warning | DVN | 44 min |
| Apr 17, 11:17 AM CDT | River Flood Warning | DVN | 8 days |
| Apr 17, 11:32 AM CDT | Flash Flood Warning | DVN | 6 hr |
| Apr 17, 1:33 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Apr 17, 8:37 PM CDT | Flash Flood Warning | DVN | 8 hr |
| Apr 18, 3:46 AM CDT | Areal Flood Warning | DVN | 18 hr |
| Apr 29, 10:21 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 2, 3:24 PM CDT | Winter Weather Advisory | DVN | 19 hr |
| May 4, 10:27 AM CDT | River Flood Warning | DVN | 11 days |
| May 9, 4:32 PM CDT | Special Weather Statement | DVN | 118 min |
| May 11, 3:04 PM CDT | Frost Advisory | DVN | 16 hr |
| May 19, 4:34 AM CDT | Special Weather Statement | DVN | 41 min |
| May 19, 11:30 AM CDT | Mesoscale Discussion | SPC | 90 min |
| May 19, 2:59 PM CDT | Tornado Watch | SPC | 8 hr |
| May 19, 7:13 PM CDT | Mesoscale Discussion | SPC | 62 min |
| May 19, 8:10 PM CDT | Tornado Watch | SPC | 6 hr |
| May 19, 9:10 PM CDT | Severe Thunderstorm Warning | DVN | 50 min |
| May 19, 9:45 PM CDT | Severe Thunderstorm Warning | DVN | 45 min |
| May 19, 10:27 PM CDT | Severe Thunderstorm Warning | DVN | 48 min |
| May 20, 6:35 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 20, 7:53 PM CDT | River Flood Warning | DVN | 3 days |
| May 20, 9:33 PM CDT | Mesoscale Discussion | SPC | 57 min |
| May 22, 7:42 PM CDT | Special Weather Statement | DVN | 48 min |
| May 25, 9:49 AM CDT | River Flood Warning | DVN | 20 days |
| May 26, 3:06 AM CDT | Flash Flood Watch | DVN | 56 hr |
| May 26, 4:29 AM CDT | Flash Flood Warning | DVN | 6 hr |
| May 26, 4:52 PM CDT | Flash Flood Warning | DVN | 9 hr |
| May 26, 7:07 PM CDT | Flash Flood Warning | DVN | 9 hr |
| May 28, 1:14 AM CDT | Special Weather Statement | DVN | 91 min |
| May 28, 3:36 AM CDT | Special Weather Statement | DVN | 54 min |
| May 28, 10:53 AM CDT | Flash Flood Watch | DVN | 19 hr |
| May 28, 1:37 PM CDT | Mesoscale Discussion | SPC | 113 min |
| May 28, 2:23 PM CDT | Tornado Watch | SPC | 8 hr |
| May 29, 2:39 PM CDT | Mesoscale Discussion | SPC | 66 min |
| May 29, 2:56 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 29, 3:18 PM CDT | Flash Flood Watch | DVN | 54 hr |
| May 29, 5:01 PM CDT | Severe Thunderstorm Warning | DVN | 44 min |
| May 29, 5:54 PM CDT | Mesoscale Discussion | SPC | 66 min |
| May 29, 6:07 PM CDT | Flash Flood Warning | DVN | 6 hr |
| May 29, 9:00 PM CDT | Mesoscale Discussion | SPC | 60 min |
| May 30, 12:32 PM CDT | Tornado Watch | SPC | 7 hr |
| May 30, 3:28 PM CDT | Severe Thunderstorm Warning | DVN | 47 min |
| May 30, 3:59 PM CDT | Severe Thunderstorm Warning | DVN | 46 min |
| Jun 12, 10:52 AM CDT | Special Weather Statement | DVN | 2 hr |
| Jun 12, 12:49 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 12, 12:56 PM CDT | Special Weather Statement | DVN | 109 min |
| Jun 12, 1:49 PM CDT | Tornado Watch | SPC | 9 hr |
| Jun 12, 6:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 21, 8:38 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 21, 10:12 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 23, 3:57 AM CDT | Flash Flood Watch | DVN | 3 days |
| Jun 24, 9:50 AM CDT | Flash Flood Warning | DVN | 6 hr |
| Jun 24, 12:14 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 24, 1:18 PM CDT | Tornado Warning | DVN | 27 min |
| Jun 24, 1:53 PM CDT | Special Weather Statement | DVN | 52 min |
| Jun 24, 2:11 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 2:24 PM CDT | Severe Thunderstorm Warning | DVN | 51 min |
| Jun 24, 2:35 PM CDT | Tornado Warning | DVN | 25 min |
| Jun 24, 11:20 PM CDT | River Flood Warning | DVN | 6 days |
| Jun 25, 9:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 25, 9:49 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 2:30 AM CDT | Severe Thunderstorm Warning | DVN | 45 min |
| Jun 26, 3:32 AM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 17, 3:02 AM CDT | Heat Advisory | DVN | 64 hr |
| Jul 22, 3:43 AM CDT | Special Weather Statement | DVN | 3 hr |
| Jul 22, 6:40 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 22, 7:28 PM CDT | Severe Thunderstorm Warning | DVN | 47 min |
| Jul 22, 7:42 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jul 25, 7:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Aug 6, 5:25 AM CDT | Dense Fog Advisory | DVN | 4 hr |
| Aug 6, 5:58 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 6, 6:51 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Aug 6, 9:37 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Aug 7, 12:43 AM CDT | Special Weather Statement | DVN | 62 min |
| Aug 7, 1:55 AM CDT | Severe Thunderstorm Warning | DVN | 35 min |
| Aug 25, 4:09 AM CDT | Heat Advisory | DVN | 6 days |
| Sep 19, 2:48 PM CDT | Special Weather Statement | DVN | 87 min |
| Sep 19, 4:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Sep 19, 4:40 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 19, 4:49 PM CDT | Special Weather Statement | DVN | 41 min |
| Sep 19, 5:30 PM CDT | Severe Thunderstorm Warning | DVN | 60 min |
| Oct 3, 8:16 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Oct 3, 11:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Oct 4, 2:06 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Oct 4, 3:39 AM CDT | Special Weather Statement | DVN | 81 min |
| Oct 4, 4:27 AM CDT | Special Weather Statement | DVN | 93 min |
| Oct 4, 7:53 AM CDT | Special Weather Statement | DVN | 52 min |
| Oct 4, 8:27 AM CDT | Severe Thunderstorm Warning | DVN | 63 min |
| Oct 4, 8:44 AM CDT | Severe Thunderstorm Warning | DVN | 46 min |
| Oct 4, 9:55 AM CDT | Special Weather Statement | DVN | 35 min |
| Oct 4, 10:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Oct 19, 3:48 AM CDT | Frost Advisory | DVN | 27 hr |
| Oct 21, 3:15 PM CDT | Freeze Warning | DVN | 17 hr |
| Oct 30, 5:20 AM CDT | Dense Fog Advisory | DVN | 8 hr |
| Dec 3, 3:23 AM CST | Dense Fog Advisory | DVN | 38 hr |
| Dec 10, 3:30 PM CST | Winter Weather Advisory | DVN | 19 hr |
| Dec 11, 3:59 AM CST | Wind Chill Advisory | DVN | 26 hr |
| Dec 19, 3:50 AM CST | Freezing Rain Advisory | DVN | 35 hr |
| Dec 19, 2:56 PM CST | Winter Storm Watch | DVN | 24 hr |
| Dec 20, 3:02 PM CST | Winter Storm Warning | DVN | 44 hr |
| Dec 21, 10:41 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 22, 3:12 PM CST | Wind Chill Advisory | DVN | 45 hr |
| Dec 28, 3:14 PM CST | Wind Chill Advisory | DVN | 42 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 | 14 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 11 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 26 |
| Special Weather Statement | 16 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 7 |
| River Flood Warning | 7 |
| Flash Flood Watch | 6 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 5 |
| Freezing Rain Advisory | 2 |
| Winter Weather Advisory | 5 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 5 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20122014
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.