Alert archive / Iowa / Keokuk County
Weather alerts in Keokuk County, Iowa, 2017
89 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Keokuk County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 89
- Warnings
- 21
- Watches
- 13
- Advisories
- 29
- Busiest month
- July16 alerts
- Busiest day
- May 17, 20177 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
2 of 2 tornado warnings covering Keokuk County in 2017 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 42 minutes after it went out.
Keokuk County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 2 | 0% | 2 | 100% | 42 min |
| Severe thunderstorm warnings | 12 | 7 | 42% | 7 | 86% | 26 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Quad Cities, IA: tornado warnings | 52 | 21 | 60% | 52 | 54% | 16 min |
| NWS Quad Cities, IA: severe thunderstorm warnings | 197 | 152 | 23% | 505 | 78% | 27 min |
| NWS Quad Cities, IA: flash flood warnings | 25 | 15 | 40% | 38 | 87% | 113 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 2, 4:31 PM CST | Dense Fog Advisory | DVN | 15 hr |
| Jan 10, 9:41 AM CST | Wind Advisory | DVN | 11 hr |
| Jan 12, 3:33 PM CST | Winter Storm Watch | DVN | 48 hr |
| Jan 14, 3:47 PM CST | Winter Weather Advisory | DVN | 47 hr |
| Jan 16, 4:30 PM CST | Dense Fog Advisory | DVN | 14 hr |
| Jan 19, 1:46 AM CST | Dense Fog Advisory | DVN | 10 hr |
| Jan 19, 3:26 PM CST | Dense Fog Advisory | DVN | 21 hr |
| Jan 20, 3:14 PM CST | Dense Fog Advisory | DVN | 21 hr |
| Jan 21, 3:50 PM CST | Dense Fog Advisory | DVN | 19 hr |
| Feb 6, 9:10 PM CST | Dense Fog Advisory | DVN | 15 hr |
| Feb 8, 3:33 AM CST | Winter Weather Advisory | DVN | 12 hr |
| Feb 23, 9:48 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 28, 2:57 PM CST | Tornado Watch | SPC | 7 hr |
| Feb 28, 3:26 PM CST | Severe Thunderstorm Warning | DVN | 36 min |
| Feb 28, 5:19 PM CST | Severe Thunderstorm Warning | DVN | 26 min |
| Mar 6, 1:08 PM CST | Mesoscale Discussion | SPC | 3 hr |
| Mar 6, 1:54 PM CST | Tornado Watch | SPC | 8 hr |
| Mar 6, 3:35 PM CST | Mesoscale Discussion | SPC | 115 min |
| Mar 6, 6:11 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 6, 7:42 PM CST | Mesoscale Discussion | SPC | 63 min |
| Mar 6, 8:04 PM CST | Severe Thunderstorm Warning | DVN | 56 min |
| Mar 6, 8:46 PM CST | Severe Thunderstorm Warning | DVN | 74 min |
| Mar 7, 3:32 AM CST | Red Flag Warning | DVN | 14 hr |
| Mar 8, 10:21 AM CST | Red Flag Warning | DVN | 8 hr |
| Mar 12, 4:27 AM CDT | Winter Weather Advisory | DVN | 33 hr |
| Mar 26, 5:22 AM CDT | Dense Fog Advisory | DVN | 7 hr |
| Apr 5, 7:49 PM CDT | River Flood Warning | DVN | 3 days |
| Apr 10, 1:53 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 15, 4:47 PM CDT | Special Weather Statement | DVN | 43 min |
| Apr 15, 6:58 PM CDT | Severe Thunderstorm Warning | DVN | 24 min |
| Apr 15, 7:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Apr 19, 8:57 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 19, 10:06 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Apr 30, 7:25 PM CDT | Special Weather Statement | DVN | 65 min |
| May 10, 12:05 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 10, 12:59 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 17, 1:23 AM CDT | Special Weather Statement | DVN | 37 min |
| May 17, 11:39 AM CDT | Mesoscale Discussion | SPC | 66 min |
| May 17, 3:24 PM CDT | Mesoscale Discussion | SPC | 66 min |
| May 17, 3:38 PM CDT | Tornado Warning | DVN | 52 min |
| May 17, 3:44 PM CDT | Tornado Watch | SPC | 9 hr |
| May 17, 5:03 PM CDT | Severe Thunderstorm Warning | DVN | 57 min |
| May 17, 5:39 PM CDT | Severe Thunderstorm Warning | DVN | 66 min |
| May 27, 1:53 AM CDT | Dense Fog Advisory | DVN | 8 hr |
| May 27, 4:21 PM CDT | Special Weather Statement | DVN | 24 min |
| May 27, 4:27 PM CDT | Severe Thunderstorm Warning | DVN | 63 min |
| May 27, 4:40 PM CDT | Tornado Warning | DVN | 50 min |
| Jun 13, 10:42 AM CDT | Heat Advisory | DVN | 9 hr |
| Jun 14, 12:06 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 15, 6:39 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 15, 9:33 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Jun 16, 10:25 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 17, 2:44 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 17, 6:33 PM CDT | Severe Thunderstorm Warning | DVN | 42 min |
| Jun 28, 2:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 2:53 PM CDT | Tornado Watch | SPC | 9 hr |
| Jun 28, 5:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 10, 1:49 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 10, 2:20 PM CDT | Heat Advisory | DVN | 5 hr |
| Jul 11, 5:27 AM CDT | Special Weather Statement | DVN | 48 min |
| Jul 11, 5:40 AM CDT | Severe Thunderstorm Warning | DVN | 50 min |
| Jul 11, 11:25 AM CDT | Heat Advisory | DVN | 9 hr |
| Jul 12, 4:05 AM CDT | Heat Advisory | DVN | 16 hr |
| Jul 17, 3:37 PM CDT | Excessive Heat Watch | DVN | 36 hr |
| Jul 18, 3:08 PM CDT | Excessive Heat Warning | DVN | 4 days |
| Jul 20, 9:46 PM CDT | Severe Thunderstorm Warning | DVN | 30 min |
| Jul 20, 11:39 PM CDT | Severe Thunderstorm Warning | DVN | 27 min |
| Jul 21, 1:32 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 4:52 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 21, 6:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 21, 8:35 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jul 21, 11:23 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jul 26, 3:23 AM CDT | Flash Flood Watch | DVN | 20 hr |
| Aug 28, 2:18 AM CDT | Dense Fog Advisory | DVN | 9 hr |
| Sep 19, 12:50 AM CDT | Dense Fog Advisory | DVN | 9 hr |
| Sep 21, 3:45 AM CDT | Flash Flood Warning | DVN | 6 hr |
| Sep 22, 10:16 AM CDT | Heat Advisory | DVN | 9 hr |
| Oct 14, 3:30 AM CDT | Flash Flood Watch | DVN | 19 hr |
| Oct 27, 3:39 AM CDT | Freeze Warning | DVN | 28 hr |
| Oct 27, 3:39 AM CDT | Freeze Warning | DVN | 53 hr |
| Nov 2, 1:31 AM CDT | Dense Fog Advisory | DVN | 9 hr |
| Nov 4, 11:19 PM CDT | Dense Fog Advisory | DVN | 8 hr |
| Nov 12, 9:39 PM CST | Dense Fog Advisory | DVN | 14 hr |
| Dec 4, 9:58 PM CST | Wind Advisory | DVN | 20 hr |
| Dec 13, 3:26 AM CST | Wind Advisory | DVN | 17 hr |
| Dec 23, 3:20 AM CST | Winter Weather Advisory | DVN | 39 hr |
| Dec 26, 1:25 PM CST | Wind Chill Advisory | DVN | 22 hr |
| Dec 28, 3:15 PM CST | Winter Weather Advisory | DVN | 29 hr |
| Dec 29, 3:11 PM CST | Wind Chill Advisory | DVN | 54 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 | 12 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 21 |
| Special Weather Statement | 5 |
| Flooding | |
| Flash Flood Warning | 1 |
| River Flood Warning | 1 |
| Flash Flood Watch | 2 |
| Winter | |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 5 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 2 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 14 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.