Alert archive / Iowa / Hancock County
Weather alerts in Hancock County, Iowa, 2013
118 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Hancock County and its neighbors
Each county as a circle sized by its count in 2013. Tap one for its archive.
- Alerts
- 118
- Warnings
- 27
- Watches
- 18
- Advisories
- 41
- Busiest month
- June20 alerts
- Busiest day
- July 25, 20136 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 1 tornado warnings covering Hancock County in 2013 had a tornado report inside them.
Hancock County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 0 | ||
| Severe thunderstorm warnings | 15 | 10 | 33% | 13 | 69% | 13 min |
| Flash flood warnings | 4 | 2 | 50% | 0 |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Des Moines, IA: tornado warnings | 26 | 6 | 77% | 20 | 80% | 13 min |
| NWS Des Moines, IA: severe thunderstorm warnings | 252 | 131 | 48% | 422 | 76% | 21 min |
| NWS Des Moines, IA: flash flood warnings | 54 | 31 | 43% | 96 | 90% | 123 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 7, 11:18 PM CST | Dense Fog Advisory | DMX | 9 hr |
| Jan 10, 3:31 PM CST | Dense Fog Advisory | DMX | 29 hr |
| Jan 11, 3:38 PM CST | Wind Advisory | DMX | 19 hr |
| Jan 18, 12:07 PM CST | Wind Advisory | DMX | 5 hr |
| Jan 18, 3:38 PM CST | Wind Advisory | DMX | 32 hr |
| Jan 20, 3:38 AM CST | Wind Chill Warning | DMX | 32 hr |
| Jan 20, 3:54 PM CST | Wind Chill Advisory | DMX | 42 hr |
| Jan 23, 3:53 AM CST | Wind Chill Advisory | DMX | 26 hr |
| Jan 26, 3:35 AM CST | Winter Storm Watch | DMX | 11 hr |
| Jan 26, 3:01 PM CST | Winter Storm Warning | DMX | 33 hr |
| Jan 27, 6:40 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 27, 8:56 PM CST | Dense Fog Advisory | DMX | 33 hr |
| Jan 30, 3:18 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 30, 3:54 AM CST | Wind Chill Advisory | DMX | 56 hr |
| Feb 6, 3:48 PM CST | Freezing Rain Advisory | DMX | 6 hr |
| Feb 9, 3:26 PM CST | Winter Weather Advisory | DMX | 20 hr |
| Feb 9, 11:53 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 10, 3:32 PM CST | Wind Advisory | DMX | 24 hr |
| Feb 18, 3:45 AM CST | Wind Advisory | DMX | 17 hr |
| Feb 18, 3:21 PM CST | Wind Chill Advisory | DMX | 21 hr |
| Feb 19, 4:01 AM CST | Winter Storm Watch | DMX | 35 hr |
| Feb 19, 3:36 PM CST | Wind Chill Advisory | DMX | 17 hr |
| Feb 20, 3:44 AM CST | Winter Storm Warning | DMX | 56 hr |
| Feb 24, 4:17 AM CST | Dense Fog Advisory | DMX | 3 hr |
| Mar 2, 3:16 PM CST | Winter Storm Watch | DMX | 24 hr |
| Mar 3, 3:18 PM CST | Winter Storm Warning | DMX | 44 hr |
| Mar 4, 3:20 PM CST | Winter Weather Advisory | DMX | 24 hr |
| Mar 9, 3:17 PM CST | Winter Storm Watch | DMX | 12 hr |
| Mar 9, 7:01 PM CST | Dense Fog Advisory | DMX | 11 hr |
| Mar 10, 4:21 AM CDT | Winter Storm Warning | DMX | 29 hr |
| Mar 10, 1:16 PM CDT | Mesoscale Discussion | SPC | 5 hr |
| Mar 17, 3:43 PM CDT | Blizzard Warning | DMX | 20 hr |
| Mar 17, 3:43 PM CDT | Winter Weather Advisory | DMX | 36 hr |
| Apr 9, 5:44 PM CDT | Severe Thunderstorm Warning | DMX | 46 min |
| Apr 9, 7:03 PM CDT | Severe Thunderstorm Warning | DMX | 42 min |
| Apr 9, 7:37 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Apr 10, 4:09 PM CDT | Winter Weather Advisory | DMX | 17 hr |
| Apr 11, 2:40 AM CDT | Mesoscale Discussion | SPC | 5 hr |
| Apr 29, 7:26 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 29, 9:51 PM CDT | Severe Thunderstorm Warning | DMX | 54 min |
| Apr 29, 10:21 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 1, 4:13 PM CDT | Winter Weather Advisory | DMX | 44 hr |
| May 1, 8:10 PM CDT | Mesoscale Discussion | SPC | 4 hr |
| May 4, 3:36 PM CDT | Dense Fog Advisory | DMX | 15 hr |
| May 11, 4:02 AM CDT | Frost Advisory | DMX | 28 hr |
| May 13, 3:20 PM CDT | Fire Weather Watch | DMX | 13 hr |
| May 14, 4:21 AM CDT | Red Flag Warning | DMX | 16 hr |
| May 17, 3:40 AM CDT | Flash Flood Warning | DMX | 6 hr |
| May 17, 4:02 PM CDT | Mesoscale Discussion | SPC | 58 min |
| May 19, 3:55 AM CDT | Severe Thunderstorm Warning | DMX | 50 min |
| May 19, 11:30 AM CDT | Mesoscale Discussion | SPC | 90 min |
| May 19, 1:10 PM CDT | Tornado Watch | SPC | 8 hr |
| May 19, 5:04 PM CDT | Mesoscale Discussion | SPC | 56 min |
| May 19, 8:21 PM CDT | Mesoscale Discussion | SPC | 54 min |
| May 26, 7:24 AM CDT | Flash Flood Warning | DMX | 6 hr |
| May 26, 3:51 PM CDT | Flash Flood Watch | DMX | 41 hr |
| May 28, 3:43 AM CDT | Dense Fog Advisory | DMX | 5 hr |
| May 29, 11:01 AM CDT | Flash Flood Watch | DMX | 56 hr |
| May 31, 8:29 PM CDT | Severe Thunderstorm Warning | DMX | 31 min |
| May 31, 10:31 PM CDT | Severe Thunderstorm Warning | DMX | 29 min |
| Jun 10, 4:54 AM CDT | Dense Fog Advisory | DMX | 4 hr |
| Jun 12, 1:49 PM CDT | Tornado Watch | SPC | 9 hr |
| Jun 12, 4:06 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jun 12, 4:16 PM CDT | Tornado Warning | DMX | 29 min |
| Jun 12, 6:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 14, 3:53 AM CDT | Flash Flood Watch | DMX | 39 hr |
| Jun 15, 10:54 AM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 18, 2:16 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Jun 21, 6:10 AM CDT | Severe Thunderstorm Warning | DMX | 65 min |
| Jun 21, 8:02 AM CDT | Flash Flood Warning | DMX | 6 hr |
| Jun 21, 3:29 PM CDT | Flash Flood Watch | DMX | 16 hr |
| Jun 22, 1:15 AM CDT | Severe Thunderstorm Warning | DMX | 60 min |
| Jun 22, 2:33 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 22, 8:27 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jun 23, 3:45 AM CDT | Flash Flood Watch | DMX | 12 hr |
| Jun 24, 3:41 AM CDT | Flash Flood Watch | DMX | 51 hr |
| Jun 25, 3:15 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 26, 9:17 AM CDT | Severe Thunderstorm Warning | DMX | 43 min |
| Jul 7, 9:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 22, 1:08 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jul 22, 3:08 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 22, 3:27 PM CDT | Severe Thunderstorm Warning | DMX | 48 min |
| Jul 22, 3:53 PM CDT | Severe Thunderstorm Warning | DMX | 52 min |
| Jul 22, 5:45 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Jul 22, 7:42 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jul 25, 12:41 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 25, 1:39 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 25, 4:35 PM CDT | Severe Thunderstorm Warning | DMX | 40 min |
| Jul 25, 5:15 PM CDT | Severe Thunderstorm Warning | DMX | 45 min |
| Jul 25, 5:44 PM CDT | Flash Flood Warning | DMX | 6 hr |
| Jul 25, 6:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Aug 1, 4:07 PM CDT | Severe Thunderstorm Warning | DMX | 38 min |
| Aug 1, 4:45 PM CDT | Severe Thunderstorm Warning | DMX | 45 min |
| Aug 6, 5:28 AM CDT | Dense Fog Advisory | DMX | 6 hr |
| Aug 6, 5:22 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 11, 5:00 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Aug 21, 12:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Aug 23, 3:27 AM CDT | Dense Fog Advisory | DMX | 6 hr |
| Aug 25, 3:24 AM CDT | Heat Advisory | DMX | 6 days |
| Aug 31, 7:05 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Aug 31, 9:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 1, 1:10 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Oct 4, 2:06 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Oct 4, 6:42 PM CDT | Tornado Watch | SPC | 5 hr |
| Oct 4, 10:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Oct 30, 3:56 AM CDT | Dense Fog Advisory | DMX | 10 hr |
| Nov 2, 3:34 PM CDT | Wind Advisory | DMX | 27 hr |
| Nov 5, 3:23 AM CST | Dense Fog Advisory | DMX | 3 hr |
| Dec 3, 5:39 AM CST | Dense Fog Advisory | DMX | 33 hr |
| Dec 5, 4:02 AM CST | Wind Chill Advisory | DMX | 30 hr |
| Dec 6, 3:35 PM CST | Wind Chill Advisory | DMX | 17 hr |
| Dec 7, 3:42 PM CST | Winter Weather Advisory | DMX | 32 hr |
| Dec 8, 9:10 PM CST | Wind Chill Advisory | DMX | 18 hr |
| Dec 10, 3:38 PM CST | Winter Weather Advisory | DMX | 17 hr |
| Dec 22, 3:16 PM CST | Wind Chill Advisory | DMX | 45 hr |
| Dec 28, 4:20 AM CST | Wind Chill Advisory | DMX | 47 hr |
| Dec 28, 9:19 PM CST | Wind Advisory | DMX | 10 hr |
| Dec 30, 4:10 PM CST | Winter Weather Advisory | DMX | 29 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 | 15 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 32 |
| Flooding | |
| Flash Flood Warning | 4 |
| Flash Flood Watch | 6 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 4 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 8 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Wind Chill Warning | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 10 |
| Wind and dust | |
| Wind Advisory | 7 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 13 |
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.