Alert archive / Iowa / Dickinson County
Weather alerts in Dickinson County, Iowa, 2008
142 weather alerts in 2008, 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 2008. Tap one for its archive.
- Alerts
- 142
- Warnings
- 30
- Watches
- 24
- Advisories
- 50
- Busiest month
- June30 alerts
- Busiest day
- June 11, 20088 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
3 of 4 tornado warnings covering Dickinson County in 2008 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 3 minutes after it went out.
Dickinson County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 3 | 25% | 1 | 100% | 3 min |
| Severe thunderstorm warnings | 6 | 4 | 33% | 10 | 50% | 25 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Sioux Falls, SD: tornado warnings | 55 | 19 | 65% | 49 | 90% | 14 min |
| NWS Sioux Falls, SD: severe thunderstorm warnings | 296 | 130 | 56% | 253 | 82% | 19 min |
| NWS Sioux Falls, SD: flash flood warnings | 28 | 20 | 29% | 44 | 89% | 88 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 9, 9:53 PM CST | Snow Advisory | FSD | 5 hr |
| Jan 11, 5:17 AM CST | Dense Fog Advisory | FSD | 6 hr |
| Jan 14, 3:56 AM CST | Wind Chill Advisory | FSD | 8 hr |
| Jan 17, 10:39 AM CST | Wind Chill Advisory | FSD | 52 hr |
| Jan 18, 2:59 PM CST | Wind Chill Warning | FSD | 13 hr |
| Jan 19, 3:16 PM CST | Snow Advisory | FSD | 51 hr |
| Jan 21, 9:10 PM CST | Wind Chill Advisory | FSD | 14 hr |
| Jan 23, 2:30 PM CST | Wind Chill Advisory | FSD | 13 hr |
| Jan 28, 3:16 PM CST | Winter Weather Advisory | FSD | 21 hr |
| Jan 28, 7:22 PM CST | Wind Advisory | FSD | 11 hr |
| Jan 29, 4:19 AM CST | Wind Chill Advisory | FSD | 29 hr |
| Jan 29, 7:39 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 3, 9:23 AM CST | Dense Fog Advisory | FSD | 3 hr |
| Feb 3, 3:51 PM CST | Snow Advisory | FSD | 20 hr |
| Feb 4, 6:14 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 4, 10:09 AM CST | Winter Weather Advisory | FSD | 4 hr |
| Feb 8, 3:09 PM CST | Wind Chill Advisory | FSD | 49 hr |
| Feb 8, 3:09 PM CST | Winter Weather Advisory | FSD | 24 hr |
| Feb 9, 3:36 PM CST | Wind Chill Warning | FSD | 20 hr |
| Feb 10, 9:43 PM CST | Snow Advisory | FSD | 29 hr |
| Feb 17, 12:25 PM CST | Wind Advisory | FSD | 7 hr |
| Feb 18, 6:37 PM CST | Wind Chill Advisory | FSD | 5 hr |
| Feb 19, 4:00 AM CST | Wind Chill Advisory | FSD | 31 hr |
| Feb 19, 3:34 PM CST | Wind Chill Warning | FSD | 20 hr |
| Feb 24, 6:18 AM CST | Dense Fog Advisory | FSD | 5 hr |
| Feb 24, 9:38 AM CST | Air Stagnation Advisory | FSD | 4 hr |
| Feb 24, 3:58 PM CST | Winter Weather Advisory | FSD | 26 hr |
| Mar 2, 3:34 AM CST | Wind Advisory | FSD | 14 hr |
| Mar 17, 4:32 AM CDT | Snow Advisory | FSD | 8 hr |
| Mar 17, 7:25 PM CDT | Dense Fog Advisory | FSD | 15 hr |
| Mar 20, 9:58 AM CDT | River Flood Warning | FSD | 72 hr |
| Mar 22, 4:35 AM CDT | River Flood Warning | FSD | 29 hr |
| Mar 26, 11:15 AM CDT | Snow Advisory | FSD | 26 hr |
| Mar 30, 2:32 PM CDT | Snow Advisory | FSD | 28 hr |
| Apr 11, 8:41 AM CDT | River Flood Warning | FSD | 49 hr |
| Apr 14, 3:53 PM CDT | Wind Advisory | FSD | 29 hr |
| Apr 21, 11:54 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 26, 1:00 PM CDT | River Flood Warning | FSD | 69 hr |
| May 1, 4:34 PM CDT | Tornado Watch | SPC | 5 hr |
| May 1, 6:33 PM CDT | Mesoscale Discussion | SPC | 57 min |
| May 1, 7:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 2, 2:48 PM CDT | River Flood Warning | FSD | 7 days |
| May 2, 3:49 PM CDT | Wind Advisory | FSD | 12 hr |
| May 6, 10:56 AM CDT | Mesoscale Discussion | SPC | 94 min |
| May 6, 12:03 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 6, 2:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| May 10, 3:22 AM CDT | Wind Advisory | FSD | 25 hr |
| May 12, 12:46 PM CDT | Wind Advisory | FSD | 6 hr |
| May 17, 12:16 PM CDT | Wind Advisory | FSD | 8 hr |
| May 19, 6:21 PM CDT | Mesoscale Discussion | SPC | 54 min |
| May 24, 9:01 PM CDT | Mesoscale Discussion | SPC | 59 min |
| May 29, 3:28 AM CDT | Flash Flood Watch | FSD | 24 hr |
| May 29, 9:44 AM CDT | River Flood Warning | FSD | 4 days |
| Jun 4, 8:09 AM CDT | River Flood Warning | FSD | 4 days |
| Jun 4, 3:00 PM CDT | Flash Flood Watch | FSD | 12 hr |
| Jun 5, 10:35 AM CDT | Flash Flood Watch | FSD | 11 hr |
| Jun 5, 10:55 AM CDT | Tornado Watch | SPC | 8 hr |
| Jun 5, 12:39 PM CDT | Flash Flood Warning | FSD | 3 hr |
| Jun 5, 2:01 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jun 5, 5:10 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 5, 5:50 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 5, 8:29 PM CDT | High Wind Warning | FSD | 4 hr |
| Jun 6, 4:12 AM CDT | Wind Advisory | FSD | 13 hr |
| Jun 7, 3:14 AM CDT | Flash Flood Watch | FSD | 27 hr |
| Jun 7, 10:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 8, 10:26 AM CDT | River Flood Warning | FSD | 11 days |
| Jun 10, 3:46 PM CDT | Flash Flood Watch | FSD | 34 hr |
| Jun 11, 4:40 AM CDT | Mesoscale Discussion | SPC | 65 min |
| Jun 11, 5:16 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 11, 6:23 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 11, 10:22 AM CDT | Wind Advisory | FSD | 5 hr |
| Jun 11, 2:52 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 11, 5:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 11, 6:28 PM CDT | Tornado Warning | FSD | 32 min |
| Jun 11, 6:48 PM CDT | Tornado Warning | FSD | 42 min |
| Jun 11, 7:02 PM CDT | Tornado Warning | FSD | 28 min |
| Jun 12, 9:39 AM CDT | River Flood Warning | FSD | 4 days |
| Jun 21, 3:05 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 26, 6:38 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 26, 3:06 PM CDT | Flash Flood Watch | FSD | 12 hr |
| Jun 26, 9:46 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 27, 3:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 28, 3:06 AM CDT | Wind Advisory | FSD | 18 hr |
| Jul 6, 2:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 6, 3:05 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 6, 6:54 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jul 10, 9:36 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 11, 3:13 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 11, 5:08 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 11, 8:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 17, 8:55 AM CDT | Mesoscale Discussion | SPC | 65 min |
| Jul 17, 10:57 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 17, 12:31 PM CDT | Severe Thunderstorm Warning | FSD | 29 min |
| Jul 17, 5:50 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jul 19, 1:09 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 19, 2:28 PM CDT | Tornado Watch | SPC | 8 hr |
| Jul 19, 4:42 PM CDT | Severe Thunderstorm Warning | FSD | 33 min |
| Jul 27, 6:22 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 31, 7:18 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 31, 8:03 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 31, 10:28 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Aug 2, 11:13 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 3, 2:29 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 8:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 13, 4:37 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Aug 13, 4:45 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 13, 5:46 PM CDT | Severe Thunderstorm Warning | FSD | 44 min |
| Aug 13, 6:05 PM CDT | Tornado Warning | FSD | 25 min |
| Aug 13, 6:28 PM CDT | Severe Thunderstorm Warning | FSD | 32 min |
| Aug 13, 6:52 PM CDT | Severe Thunderstorm Warning | FSD | 38 min |
| Aug 27, 4:48 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Aug 27, 10:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 25, 3:48 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Oct 1, 9:40 AM CDT | Frost Advisory | FSD | 23 hr |
| Oct 12, 3:56 AM CDT | Wind Advisory | FSD | 15 hr |
| Oct 13, 3:33 PM CDT | Freeze Warning | FSD | 17 hr |
| Oct 15, 3:05 PM CDT | Freeze Warning | FSD | 18 hr |
| Oct 25, 1:41 PM CDT | High Wind Watch | FSD | 14 hr |
| Oct 26, 3:49 AM CDT | High Wind Warning | FSD | 16 hr |
| Nov 3, 9:57 AM CST | Wind Advisory | FSD | 8 hr |
| Nov 5, 2:51 PM CST | Mesoscale Discussion | SPC | 114 min |
| Nov 5, 7:12 PM CST | Severe Thunderstorm Warning | FSD | 33 min |
| Nov 6, 3:45 AM CST | Winter Weather Advisory | FSD | 38 hr |
| Nov 10, 11:06 AM CST | Winter Weather Advisory | FSD | 27 hr |
| Nov 10, 7:19 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Nov 12, 2:50 AM CST | Dense Fog Advisory | FSD | 7 hr |
| Dec 2, 3:10 PM CST | Winter Weather Advisory | FSD | 12 hr |
| Dec 8, 4:34 AM CST | Winter Weather Advisory | FSD | 23 hr |
| Dec 13, 4:01 PM CST | Winter Weather Advisory | FSD | 32 hr |
| Dec 14, 3:50 PM CST | Wind Chill Advisory | FSD | 24 hr |
| Dec 15, 3:47 PM CST | Winter Weather Advisory | FSD | 24 hr |
| Dec 17, 3:50 AM CST | Winter Storm Watch | FSD | 17 hr |
| Dec 17, 8:44 PM CST | Winter Weather Advisory | FSD | 33 hr |
| Dec 18, 11:21 AM CST | Winter Storm Warning | FSD | 19 hr |
| Dec 18, 3:39 PM CST | Blizzard Watch | FSD | 24 hr |
| Dec 18, 6:37 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 18, 11:38 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 19, 4:25 AM CST | Winter Weather Advisory | FSD | 32 hr |
| Dec 19, 4:08 PM CST | Blizzard Warning | FSD | 47 hr |
| Dec 21, 3:45 AM CST | Wind Chill Warning | FSD | 17 hr |
| Dec 26, 9:06 AM CST | Dense Fog Advisory | FSD | 4 hr |
| Dec 26, 12:35 PM CST | Dense Fog Advisory | FSD | 7 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 archive20072009
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.