Alert archive / Iowa / Dickinson County
Weather alerts in Dickinson County, Iowa, 2015
96 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Dickinson County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 96
- Warnings
- 19
- Watches
- 18
- Advisories
- 34
- Busiest month
- January21 alerts
- Busiest day
- June 22, 20155 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 reports fell inside a warning.
Dickinson County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 1 | 0% | |||
| Severe thunderstorm warnings | 4 | 4 | 0% | 4 | 75% | 29 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Sioux Falls, SD: tornado warnings | 30 | 13 | 57% | 25 | 68% | 14 min |
| NWS Sioux Falls, SD: severe thunderstorm warnings | 175 | 123 | 30% | 220 | 86% | 20 min |
| NWS Sioux Falls, SD: flash flood warnings | 19 | 13 | 32% | 19 | 95% | 37 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, 3:25 PM CST | Wind Chill Advisory | FSD | 69 hr |
| Jan 3, 4:19 AM CST | Winter Weather Advisory | FSD | 23 hr |
| Jan 3, 3:36 PM CST | Winter Storm Watch | FSD | 37 hr |
| Jan 3, 6:28 PM CST | Blizzard Warning | FSD | 7 hr |
| Jan 3, 6:28 PM CST | Winter Weather Advisory | FSD | 9 hr |
| Jan 4, 3:15 PM CST | Winter Storm Warning | FSD | 30 hr |
| Jan 5, 12:25 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 5, 5:16 PM CST | Wind Chill Advisory | FSD | 19 hr |
| Jan 6, 4:25 AM CST | Wind Chill Warning | FSD | 31 hr |
| Jan 6, 4:25 AM CST | Wind Chill Advisory | FSD | 47 hr |
| Jan 7, 4:36 AM CST | Blizzard Watch | FSD | 23 hr |
| Jan 7, 3:26 PM CST | Winter Weather Advisory | FSD | 37 hr |
| Jan 8, 3:54 AM CST | Wind Chill Advisory | FSD | 30 hr |
| Jan 8, 1:39 PM CST | Blizzard Warning | FSD | 8 hr |
| Jan 9, 4:03 AM CST | Wind Chill Advisory | FSD | 26 hr |
| Jan 12, 3:34 AM CST | Wind Chill Advisory | FSD | 31 hr |
| Jan 16, 2:58 PM CST | Wind Advisory | FSD | 25 hr |
| Jan 19, 5:07 AM CST | Freezing Rain Advisory | FSD | 4 hr |
| Jan 28, 12:36 PM CST | Wind Advisory | FSD | 20 hr |
| Jan 31, 3:50 AM CST | Winter Weather Advisory | FSD | 35 hr |
| Jan 31, 9:53 AM CST | Winter Storm Warning | FSD | 32 hr |
| Feb 8, 1:14 AM CST | Freezing Rain Advisory | FSD | 10 hr |
| Feb 9, 3:25 PM CST | Freezing Rain Advisory | FSD | 23 hr |
| Feb 17, 2:54 AM CST | Wind Chill Advisory | FSD | 33 hr |
| Feb 20, 3:35 PM CST | Wind Chill Advisory | FSD | 44 hr |
| Feb 24, 2:55 PM CST | Winter Storm Warning | FSD | 24 hr |
| Feb 25, 3:11 PM CST | Wind Chill Advisory | FSD | 21 hr |
| Mar 24, 4:06 AM CDT | Winter Weather Advisory | FSD | 18 hr |
| Mar 28, 3:06 PM CDT | Wind Advisory | FSD | 28 hr |
| Mar 31, 2:58 PM CDT | Wind Advisory | FSD | 27 hr |
| Apr 1, 3:50 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Apr 20, 3:31 AM CDT | Wind Advisory | FSD | 15 hr |
| Apr 21, 3:53 AM CDT | Wind Advisory | FSD | 14 hr |
| Apr 22, 3:39 AM CDT | Freeze Warning | FSD | 28 hr |
| May 3, 3:41 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 3, 5:34 PM CDT | Severe Thunderstorm Warning | FSD | 29 min |
| May 5, 11:53 PM CDT | Dense Fog Advisory | FSD | 7 hr |
| May 10, 10:24 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 10, 10:46 AM CDT | Tornado Watch | SPC | 8 hr |
| May 17, 12:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| May 25, 6:06 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 6, 8:45 PM CDT | Tornado Watch | SPC | 4 hr |
| Jun 6, 11:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 9, 7:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 10, 2:42 PM CDT | Flash Flood Watch | FSD | 19 hr |
| Jun 20, 2:52 AM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 20, 3:18 AM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 20, 3:56 AM CDT | Severe Thunderstorm Warning | FSD | 49 min |
| Jun 22, 2:25 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 22, 4:53 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 5:23 AM CDT | Severe Thunderstorm Warning | FSD | 37 min |
| Jun 22, 5:30 AM CDT | Severe Thunderstorm Warning | FSD | 45 min |
| Jun 22, 5:34 AM CDT | High Wind Warning | FSD | 2 hr |
| Jul 3, 6:19 AM CDT | Dense Fog Advisory | FSD | 3 hr |
| Jul 5, 7:42 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 6, 1:01 AM CDT | Mesoscale Discussion | SPC | 29 min |
| Jul 11, 4:00 AM CDT | Heat Advisory | FSD | 39 hr |
| Jul 12, 3:53 PM CDT | Mesoscale Discussion | SPC | 82 min |
| Jul 12, 5:28 PM CDT | Tornado Watch | SPC | 5 hr |
| Jul 12, 7:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 17, 8:55 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 17, 8:57 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 17, 11:26 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 25, 9:32 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jul 25, 10:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 28, 3:37 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 7:15 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 16, 10:56 AM CDT | Flash Flood Watch | FSD | 9 hr |
| Aug 16, 4:01 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 18, 3:18 AM CDT | Flash Flood Watch | FSD | 9 hr |
| Aug 22, 2:13 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Aug 22, 2:35 PM CDT | Tornado Watch | SPC | 7 hr |
| Sep 6, 2:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 6, 5:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Sep 17, 3:58 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 11, 4:20 PM CDT | Wind Advisory | FSD | 26 hr |
| Oct 15, 3:34 AM CDT | Freeze Warning | FSD | 29 hr |
| Oct 16, 4:12 AM CDT | Freeze Warning | FSD | 29 hr |
| Oct 23, 6:13 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Nov 10, 3:43 AM CST | High Wind Watch | FSD | 11 hr |
| Nov 10, 3:02 PM CST | High Wind Warning | FSD | 39 hr |
| Nov 10, 3:02 PM CST | Wind Advisory | FSD | 51 hr |
| Nov 18, 3:52 AM CST | Wind Advisory | FSD | 38 hr |
| Nov 18, 3:10 PM CST | Winter Storm Watch | FSD | 37 hr |
| Nov 19, 3:44 PM CST | Winter Storm Warning | FSD | 30 hr |
| Nov 25, 2:59 PM CST | Winter Weather Advisory | FSD | 26 hr |
| Nov 28, 2:41 PM CST | Winter Storm Watch | FSD | 25 hr |
| Nov 29, 3:26 PM CST | Winter Storm Warning | FSD | 42 hr |
| Nov 30, 12:03 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 6, 5:52 AM CST | Dense Fog Advisory | FSD | 6 hr |
| Dec 6, 7:49 PM CST | Dense Fog Advisory | FSD | 7 hr |
| Dec 14, 7:12 AM CST | Wind Advisory | FSD | 4 hr |
| Dec 15, 5:12 AM CST | River Flood Warning | FSD | 56 hr |
| Dec 24, 3:47 PM CST | Winter Weather Advisory | FSD | 47 hr |
| Dec 26, 2:51 PM CST | Winter Storm Watch | FSD | 37 hr |
| Dec 27, 3:19 PM CST | Winter Storm Warning | FSD | 46 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 | 4 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 25 |
| Flooding | |
| River Flood Warning | 1 |
| Flash Flood Watch | 3 |
| Winter | |
| Blizzard Warning | 2 |
| Winter Storm Warning | 6 |
| Blizzard Watch | 1 |
| Winter Storm Watch | 4 |
| Freezing Rain Advisory | 3 |
| Winter Weather Advisory | 7 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Warning | 1 |
| Wind Chill Advisory | 9 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 1 |
| Wind Advisory | 10 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20142016
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.