Alert archive / Iowa / Worth County
Weather alerts in Worth County, Iowa, 2010
158 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Worth County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 158
- Warnings
- 25
- Watches
- 32
- Advisories
- 55
- Busiest month
- June24 alerts
- Busiest day
- June 26, 20106 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Worth County in 2010 had a tornado report inside them.
Worth County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 8 | 6 | 25% | 3 | 67% | 26 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Des Moines, IA: tornado warnings | 56 | 12 | 79% | 33 | 76% | 14 min |
| NWS Des Moines, IA: severe thunderstorm warnings | 361 | 187 | 48% | 501 | 81% | 24 min |
| NWS Des Moines, IA: flash flood warnings | 100 | 64 | 36% | 180 | 87% | 120 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 1, 2:24 PM CST | Wind Chill Warning | DMX | 19 hr |
| Jan 2, 9:14 AM CST | Wind Chill Advisory | DMX | 9 hr |
| Jan 3, 2:55 PM CST | Wind Chill Advisory | DMX | 20 hr |
| Jan 4, 3:41 PM CST | Wind Chill Advisory | DMX | 19 hr |
| Jan 4, 6:52 PM CST | Wind Chill Warning | DMX | 8 hr |
| Jan 5, 3:59 AM CST | Winter Storm Watch | DMX | 12 hr |
| Jan 5, 3:40 PM CST | Winter Storm Warning | DMX | 53 hr |
| Jan 7, 3:24 PM CST | Wind Chill Warning | DMX | 21 hr |
| Jan 7, 3:24 PM CST | Wind Chill Advisory | DMX | 42 hr |
| Jan 9, 9:33 PM CST | Wind Chill Advisory | DMX | 11 hr |
| Jan 16, 3:14 PM CST | Dense Fog Advisory | DMX | 24 hr |
| Jan 17, 3:16 PM CST | Dense Fog Advisory | DMX | 48 hr |
| Jan 19, 3:58 PM CST | Winter Weather Advisory | DMX | 32 hr |
| Jan 20, 10:34 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 22, 3:51 PM CST | Freezing Rain Advisory | DMX | 12 hr |
| Jan 23, 3:37 PM CST | Dense Fog Advisory | DMX | 11 hr |
| Jan 24, 3:28 PM CST | Wind Advisory | DMX | 33 hr |
| Jan 24, 7:02 PM CST | Winter Weather Advisory | DMX | 39 hr |
| Jan 25, 9:55 AM CST | Blizzard Warning | DMX | 18 hr |
| Jan 27, 2:19 PM CST | Wind Chill Advisory | DMX | 19 hr |
| Feb 6, 3:50 PM CST | Winter Storm Watch | DMX | 24 hr |
| Feb 7, 3:47 PM CST | Winter Storm Warning | DMX | 48 hr |
| Feb 12, 8:51 PM CST | Dense Fog Advisory | DMX | 14 hr |
| Feb 14, 4:07 AM CST | Winter Weather Advisory | DMX | 32 hr |
| Feb 23, 9:08 PM CST | Wind Chill Advisory | DMX | 14 hr |
| Mar 7, 8:39 AM CST | Dense Fog Advisory | DMX | 7 hr |
| Mar 7, 4:03 PM CST | Dense Fog Advisory | DMX | 17 hr |
| Mar 8, 3:07 PM CST | River Flood Warning | DMX | 15 days |
| Mar 8, 6:33 PM CST | Dense Fog Advisory | DMX | 17 hr |
| Mar 9, 1:25 PM CST | Dense Fog Advisory | DMX | 39 hr |
| Mar 9, 4:36 PM CST | Flash Flood Watch | DMX | 109 days |
| Mar 11, 9:49 AM CST | Flash Flood Watch | DMX | 4 days |
| Mar 14, 8:42 PM CDT | Dense Fog Advisory | DMX | 12 hr |
| Mar 15, 9:20 AM CDT | Dense Fog Advisory | DMX | 4 hr |
| Apr 29, 3:57 AM CDT | Wind Advisory | DMX | 13 hr |
| Apr 29, 5:18 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Apr 29, 7:56 PM CDT | Severe Thunderstorm Warning | DMX | 49 min |
| Apr 29, 8:23 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Apr 29, 8:50 PM CDT | Severe Thunderstorm Warning | DMX | 40 min |
| May 1, 3:37 AM CDT | Wind Advisory | DMX | 12 hr |
| May 4, 11:50 AM CDT | Wind Advisory | DMX | 6 hr |
| May 4, 2:49 PM CDT | Mesoscale Discussion | SPC | 56 min |
| May 5, 3:21 AM CDT | Wind Advisory | DMX | 14 hr |
| May 7, 10:48 AM CDT | Wind Advisory | DMX | 17 hr |
| May 7, 3:48 PM CDT | Freeze Watch | DMX | 12 hr |
| May 8, 3:54 AM CDT | Freeze Warning | DMX | 29 hr |
| May 10, 9:13 PM CDT | High Wind Warning | DMX | 3 hr |
| May 22, 3:38 AM CDT | Wind Advisory | DMX | 15 hr |
| Jun 1, 1:36 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jun 5, 2:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jun 10, 10:02 AM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 10, 1:13 PM CDT | Wind Advisory | DMX | 3 hr |
| Jun 17, 1:54 PM CDT | Tornado Watch | SPC | 8 hr |
| Jun 17, 7:39 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 17, 8:35 PM CDT | Severe Thunderstorm Warning | DMX | 55 min |
| Jun 22, 3:40 PM CDT | Flash Flood Watch | DMX | 20 hr |
| Jun 22, 7:08 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 9:00 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 22, 11:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 23, 12:40 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 25, 3:35 PM CDT | Tornado Watch | SPC | 8 hr |
| Jun 25, 5:57 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 8:24 PM CDT | Severe Thunderstorm Warning | DMX | 66 min |
| Jun 25, 8:39 PM CDT | Tornado Warning | DMX | 39 min |
| Jun 26, 3:55 AM CDT | Flash Flood Watch | DMX | 28 hr |
| Jun 26, 12:47 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 26, 3:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 26, 6:00 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 26, 7:56 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 8:18 PM CDT | River Flood Warning | DMX | 32 hr |
| Jun 26, 10:02 PM CDT | Severe Thunderstorm Warning | DMX | 58 min |
| Jun 26, 10:26 PM CDT | Areal Flood Advisory | DMX | 3 hr |
| Jul 7, 2:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 13, 3:33 AM CDT | Dense Fog Advisory | DMX | 4 hr |
| Jul 13, 3:21 PM CDT | Heat Advisory | DMX | 29 hr |
| Jul 14, 10:29 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 2:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 14, 4:38 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 16, 3:41 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 16, 4:41 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 16, 7:06 PM CDT | Severe Thunderstorm Warning | DMX | 24 min |
| Jul 16, 7:13 PM CDT | Severe Thunderstorm Warning | DMX | 32 min |
| Jul 16, 7:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 17, 8:55 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 17, 11:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 21, 3:51 PM CDT | Flash Flood Watch | DMX | 47 hr |
| Jul 22, 2:48 AM CDT | Mesoscale Discussion | SPC | 57 min |
| Jul 23, 4:06 AM CDT | Flash Flood Watch | DMX | 27 hr |
| Jul 23, 10:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jul 23, 11:16 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 24, 1:49 AM CDT | Areal Flood Advisory | DMX | 3 hr |
| Jul 28, 2:07 AM CDT | Areal Flood Advisory | DMX | 6 hr |
| Jul 30, 11:52 PM CDT | Dense Fog Advisory | DMX | 9 hr |
| Aug 7, 6:38 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 7, 3:40 PM CDT | Excessive Heat Watch | DMX | 12 hr |
| Aug 8, 2:32 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 8, 5:47 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Aug 8, 7:05 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 8, 8:57 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Aug 8, 11:19 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 10, 4:09 AM CDT | Heat Advisory | DMX | 63 hr |
| Aug 10, 6:28 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 10, 1:46 PM CDT | Tornado Watch | SPC | 6 hr |
| Aug 12, 3:45 PM CDT | Flash Flood Watch | DMX | 33 hr |
| Aug 13, 12:48 AM CDT | Mesoscale Discussion | SPC | 57 min |
| Aug 13, 9:16 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 13, 10:36 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Aug 13, 12:04 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Aug 13, 2:39 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 13, 7:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Aug 14, 2:23 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Aug 14, 6:31 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Aug 19, 3:30 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 21, 9:44 PM CDT | Dense Fog Advisory | DMX | 11 hr |
| Aug 31, 3:26 PM CDT | Mesoscale Discussion | SPC | 34 min |
| Aug 31, 4:57 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 31, 5:04 PM CDT | Severe Thunderstorm Warning | DMX | 56 min |
| Sep 3, 3:33 AM CDT | Wind Advisory | DMX | 14 hr |
| Sep 6, 4:31 AM CDT | Wind Advisory | DMX | 35 hr |
| Sep 6, 5:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Sep 15, 2:19 PM CDT | Tornado Watch | SPC | 6 hr |
| Sep 15, 6:07 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Sep 15, 7:32 PM CDT | Mesoscale Discussion | SPC | 28 min |
| Sep 22, 5:36 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Sep 22, 10:02 PM CDT | Flash Flood Watch | DMX | 18 hr |
| Oct 2, 3:56 AM CDT | Frost Advisory | DMX | 29 hr |
| Oct 2, 10:00 PM CDT | Freeze Warning | DMX | 11 hr |
| Oct 24, 3:35 PM CDT | High Wind Watch | DMX | 24 hr |
| Oct 25, 3:49 PM CDT | High Wind Watch | DMX | 36 hr |
| Oct 25, 3:49 PM CDT | High Wind Warning | DMX | 29 hr |
| Oct 25, 3:49 PM CDT | Wind Advisory | DMX | 51 hr |
| Oct 27, 3:40 AM CDT | High Wind Warning | DMX | 15 hr |
| Nov 3, 9:54 AM CDT | Wind Advisory | DMX | 8 hr |
| Nov 21, 3:22 PM CST | Freezing Rain Advisory | DMX | 23 hr |
| Nov 22, 2:32 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Nov 23, 4:02 PM CST | Winter Weather Advisory | DMX | 30 hr |
| Nov 30, 3:49 AM CST | Wind Advisory | DMX | 11 hr |
| Dec 2, 4:22 AM CST | Winter Storm Watch | DMX | 24 hr |
| Dec 3, 4:02 AM CST | Winter Weather Advisory | DMX | 29 hr |
| Dec 3, 10:13 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 3, 10:20 AM CST | Winter Storm Warning | DMX | 18 hr |
| Dec 9, 3:36 PM CST | Winter Storm Watch | DMX | 13 hr |
| Dec 10, 4:24 AM CST | Blizzard Watch | DMX | 11 hr |
| Dec 10, 3:45 PM CST | Blizzard Warning | DMX | 41 hr |
| Dec 10, 3:45 PM CST | Winter Weather Advisory | DMX | 12 hr |
| Dec 10, 4:40 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 11, 9:56 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 11, 1:46 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 12, 9:12 AM CST | Wind Chill Advisory | DMX | 27 hr |
| Dec 15, 3:50 AM CST | Winter Weather Advisory | DMX | 26 hr |
| Dec 19, 3:29 PM CST | Winter Weather Advisory | DMX | 36 hr |
| Dec 23, 3:32 AM CST | Winter Weather Advisory | DMX | 38 hr |
| Dec 24, 6:38 AM CST | Winter Storm Warning | DMX | 11 hr |
| Dec 26, 10:40 PM CST | Dense Fog Advisory | DMX | 10 hr |
| Dec 29, 11:12 AM CST | Dense Fog Advisory | DMX | 32 hr |
| Dec 30, 3:07 PM CST | Winter Weather Advisory | DMX | 22 hr |
| Dec 31, 9:29 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 31, 12:50 PM CST | Winter Weather Advisory | DMX | 3 hr |
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 archive20092011
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.