Alert archive / Iowa / Keokuk County
Weather alerts in Keokuk County, Iowa, 2016
79 weather alerts in 2016, 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 2016. Tap one for its archive.
- Alerts
- 79
- Warnings
- 7
- Watches
- 14
- Advisories
- 22
- Busiest month
- June16 alerts
- Busiest day
- June 22, 20166 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Keokuk County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 2 | 1 | 50% | 2 | 100% | 32 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Quad Cities, IA: tornado warnings | 31 | 16 | 48% | 33 | 61% | 18 min |
| NWS Quad Cities, IA: severe thunderstorm warnings | 90 | 70 | 22% | 249 | 71% | 24 min |
| NWS Quad Cities, IA: flash flood warnings | 29 | 18 | 38% | 44 | 75% | 87 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 8, 6:21 AM CST | Dense Fog Advisory | DVN | 17 hr |
| Jan 9, 3:22 AM CST | Wind Chill Advisory | DVN | 33 hr |
| Jan 16, 3:14 PM CST | Wind Chill Advisory | DVN | 45 hr |
| Feb 1, 3:48 AM CST | Winter Weather Advisory | DVN | 35 hr |
| Feb 1, 10:03 AM CST | Dense Fog Advisory | DVN | 4 hr |
| Feb 2, 5:31 PM CST | Dense Fog Advisory | DVN | 9 hr |
| Feb 13, 3:38 AM CST | Winter Weather Advisory | DVN | 38 hr |
| Feb 15, 4:30 AM CST | Dense Fog Advisory | DVN | 6 hr |
| Feb 18, 3:49 PM CST | Wind Advisory | DVN | 26 hr |
| Mar 14, 12:59 AM CDT | Dense Fog Advisory | DVN | 9 hr |
| Mar 15, 5:35 AM CDT | Special Weather Statement | DVN | 55 min |
| Mar 15, 3:27 PM CDT | Wind Advisory | DVN | 29 hr |
| Apr 1, 3:28 PM CDT | Wind Advisory | DVN | 28 hr |
| Apr 3, 4:18 AM CDT | Wind Advisory | DVN | 17 hr |
| Apr 7, 3:45 PM CDT | Freeze Watch | DVN | 12 hr |
| Apr 8, 3:16 AM CDT | Freeze Warning | DVN | 30 hr |
| Apr 11, 9:42 AM CDT | Freeze Warning | DVN | 23 hr |
| May 11, 4:31 AM CDT | Dense Fog Advisory | DVN | 5 hr |
| May 13, 1:25 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 26, 2:40 AM CDT | Special Weather Statement | DVN | 50 min |
| May 27, 7:51 PM CDT | Special Weather Statement | DVN | 54 min |
| May 27, 8:37 PM CDT | Flash Flood Warning | DVN | 6 hr |
| May 28, 12:37 PM CDT | Mesoscale Discussion | SPC | 113 min |
| May 28, 1:37 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 28, 5:33 PM CDT | Mesoscale Discussion | SPC | 57 min |
| May 31, 6:50 PM CDT | Special Weather Statement | DVN | 55 min |
| May 31, 8:13 PM CDT | Special Weather Statement | DVN | 62 min |
| Jun 1, 3:35 AM CDT | Dense Fog Advisory | DVN | 4 hr |
| Jun 14, 3:49 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 14, 8:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 21, 2:33 PM CDT | Flash Flood Watch | DVN | 19 hr |
| Jun 21, 10:28 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 21, 11:16 PM CDT | Special Weather Statement | DVN | 59 min |
| Jun 21, 11:18 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 22, 12:00 AM CDT | Special Weather Statement | DVN | 30 min |
| Jun 22, 2:31 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Jun 22, 6:11 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 26, 3:32 AM CDT | Special Weather Statement | DVN | 43 min |
| Jun 26, 4:19 AM CDT | Special Weather Statement | DVN | 41 min |
| Jun 30, 1:29 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 30, 5:36 PM CDT | Special Weather Statement | DVN | 39 min |
| Jun 30, 6:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 5, 9:50 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 6, 1:27 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 12:30 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 7, 5:53 AM CDT | Special Weather Statement | DVN | 52 min |
| Jul 7, 6:15 AM CDT | Severe Thunderstorm Warning | DVN | 45 min |
| Jul 10, 7:34 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Jul 13, 10:33 AM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 13, 11:14 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 13, 1:28 PM CDT | Severe Thunderstorm Warning | DVN | 47 min |
| Jul 18, 3:37 PM CDT | Excessive Heat Watch | DVN | 44 hr |
| Jul 19, 12:28 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 19, 3:17 PM CDT | Special Weather Statement | DVN | 58 min |
| Jul 20, 4:00 AM CDT | Excessive Heat Warning | DVN | 4 days |
| Aug 4, 4:44 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 11, 3:08 AM CDT | Flash Flood Watch | DVN | 30 hr |
| Aug 11, 9:07 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Aug 11, 10:33 PM CDT | Special Weather Statement | DVN | 87 min |
| Aug 11, 11:53 PM CDT | Special Weather Statement | DVN | 67 min |
| Aug 24, 4:05 AM CDT | Flash Flood Watch | DVN | 23 hr |
| Aug 24, 7:09 PM CDT | Special Weather Statement | DVN | 66 min |
| Aug 29, 8:11 PM CDT | Special Weather Statement | DVN | 34 min |
| Sep 6, 3:25 PM CDT | Flash Flood Watch | DVN | 39 hr |
| Sep 7, 1:37 PM CDT | Special Weather Statement | DVN | 38 min |
| Sep 19, 2:02 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Sep 19, 2:55 PM CDT | Tornado Watch | SPC | 4 hr |
| Sep 19, 5:07 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Sep 21, 2:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 12, 3:45 AM CDT | Freeze Warning | DVN | 29 hr |
| Oct 20, 2:17 PM CDT | Frost Advisory | DVN | 18 hr |
| Nov 1, 11:46 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Nov 15, 5:04 AM CST | Dense Fog Advisory | DVN | 6 hr |
| Nov 18, 11:12 AM CST | Wind Advisory | DVN | 25 hr |
| Nov 28, 4:28 PM CST | Mesoscale Discussion | SPC | 92 min |
| Dec 5, 3:47 AM CST | Dense Fog Advisory | DVN | 9 hr |
| Dec 15, 11:34 AM CST | Winter Weather Advisory | DVN | 60 hr |
| Dec 16, 3:37 PM CST | Wind Chill Advisory | DVN | 66 hr |
| Dec 29, 3:34 AM CST | Wind Advisory | DVN | 13 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 | 2 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 19 |
| Special Weather Statement | 17 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 4 |
| Winter | |
| Winter Weather Advisory | 3 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 9 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20152017
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.