Alert archive / Nebraska / Dakota County
Weather alerts in Dakota County, Nebraska, 2018
90 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Dakota County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 90
- Warnings
- 18
- Watches
- 19
- Advisories
- 32
- Busiest month
- June27 alerts
- Busiest day
- June 25, 20186 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 Dakota County in 2018 had a tornado report inside them.
Dakota County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 5 | 1 | 80% | 0 | ||
| Flash flood warnings | 5 | 3 | 40% | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Sioux Falls, SD: tornado warnings | 12 | 3 | 75% | 10 | 40% | 9 min |
| NWS Sioux Falls, SD: severe thunderstorm warnings | 165 | 77 | 53% | 157 | 81% | 19 min |
| NWS Sioux Falls, SD: flash flood warnings | 43 | 31 | 28% | 66 | 82% | 104 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, 12:01 PM CST | Wind Chill Advisory | FSD | 22 hr |
| Jan 9, 3:46 AM CST | Winter Storm Watch | FSD | 35 hr |
| Jan 10, 3:07 AM CST | Winter Weather Advisory | FSD | 38 hr |
| Jan 14, 3:20 AM CST | Wind Chill Advisory | FSD | 56 hr |
| Jan 19, 4:20 AM CST | Winter Storm Watch | FSD | 47 hr |
| Jan 21, 3:41 AM CST | Blizzard Warning | FSD | 43 hr |
| Jan 22, 2:02 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 22, 9:20 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 24, 1:03 AM CST | Dense Fog Advisory | FSD | 13 hr |
| Jan 24, 2:32 PM CST | Dense Fog Advisory | FSD | 23 hr |
| Feb 4, 3:12 PM CST | Winter Weather Advisory | FSD | 21 hr |
| Feb 7, 3:41 PM CST | Winter Weather Advisory | FSD | 35 hr |
| Feb 18, 2:53 AM CST | Wind Advisory | FSD | 11 hr |
| Feb 18, 3:48 AM CST | Winter Weather Advisory | FSD | 54 hr |
| Feb 21, 2:59 PM CST | Winter Weather Advisory | FSD | 33 hr |
| Feb 22, 3:56 PM CST | Winter Storm Watch | FSD | 23 hr |
| Feb 23, 3:00 PM CST | Winter Weather Advisory | FSD | 27 hr |
| Feb 23, 10:16 PM CST | Dense Fog Advisory | FSD | 11 hr |
| Mar 4, 2:25 PM CST | Winter Weather Advisory | FSD | 49 hr |
| Mar 15, 3:48 AM CDT | Winter Weather Advisory | FSD | 45 hr |
| Mar 30, 3:05 PM CDT | Wind Advisory | FSD | 22 hr |
| Apr 2, 2:20 PM CDT | Winter Weather Advisory | FSD | 31 hr |
| Apr 11, 3:37 PM CDT | Winter Storm Watch | FSD | 24 hr |
| Apr 12, 3:45 PM CDT | Blizzard Warning | FSD | 60 hr |
| Apr 14, 10:06 AM CDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 15, 3:27 AM CDT | Winter Weather Advisory | FSD | 13 hr |
| Apr 16, 3:21 AM CDT | Winter Storm Watch | FSD | 24 hr |
| Apr 17, 3:33 AM CDT | Winter Weather Advisory | FSD | 38 hr |
| Apr 29, 3:41 AM CDT | Wind Advisory | FSD | 16 hr |
| Apr 30, 3:31 AM CDT | Wind Advisory | FSD | 15 hr |
| May 15, 1:41 AM CDT | Dense Fog Advisory | FSD | 7 hr |
| May 27, 3:28 AM CDT | Heat Advisory | FSD | 16 hr |
| Jun 1, 10:05 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 6, 2:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 8, 11:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 9, 2:51 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 10, 1:23 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 11, 2:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 11, 3:42 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 11, 4:20 PM CDT | Severe Thunderstorm Warning | FSD | 25 min |
| Jun 14, 2:50 PM CDT | Heat Advisory | FSD | 3 days |
| Jun 17, 3:52 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 18, 1:34 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 18, 3:05 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 18, 5:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jun 20, 3:16 AM CDT | Flash Flood Watch | FSD | 28 hr |
| Jun 21, 11:16 PM CDT | River Flood Warning | FSD | 6 days |
| Jun 24, 3:28 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Jun 24, 9:05 PM CDT | Flash Flood Warning | FSD | 3 hr |
| Jun 24, 9:52 PM CDT | Flash Flood Watch | FSD | 25 hr |
| Jun 24, 10:41 PM CDT | Flash Flood Warning | FSD | 4 hr |
| Jun 24, 11:13 PM CDT | Flash Flood Warning | FSD | 4 hr |
| Jun 25, 2:46 AM CDT | Areal Flood Warning | FSD | 12 hr |
| Jun 25, 5:49 PM CDT | Flash Flood Warning | FSD | 4 hr |
| Jun 26, 5:21 AM CDT | River Flood Warning | FSD | 12 hr |
| Jun 28, 3:17 AM CDT | Heat Advisory | FSD | 41 hr |
| Jun 28, 7:20 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 3:09 AM CDT | Flash Flood Watch | FSD | 25 hr |
| Jun 30, 12:40 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 4, 4:16 AM CDT | Heat Advisory | FSD | 16 hr |
| Jul 4, 2:01 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 4, 5:35 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jul 10, 2:39 PM CDT | Heat Advisory | FSD | 53 hr |
| Jul 15, 6:18 AM CDT | Dense Fog Advisory | FSD | 3 hr |
| Jul 18, 6:14 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 18, 9:21 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Aug 5, 1:00 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 26, 8:14 AM CDT | Severe Thunderstorm Warning | FSD | 46 min |
| Aug 26, 9:53 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 27, 11:49 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Aug 27, 2:24 PM CDT | Severe Thunderstorm Warning | FSD | 36 min |
| Sep 4, 4:01 AM CDT | Flash Flood Watch | FSD | 17 hr |
| Sep 18, 10:48 AM CDT | Flash Flood Warning | FSD | 2 hr |
| Sep 19, 2:40 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 19, 10:31 AM CDT | Flash Flood Watch | FSD | 26 hr |
| Sep 19, 7:19 PM CDT | Severe Thunderstorm Warning | FSD | 26 min |
| Sep 20, 2:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 20, 3:11 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 20, 3:59 PM CDT | Severe Thunderstorm Warning | FSD | 46 min |
| Sep 20, 4:17 PM CDT | Tornado Warning | FSD | 28 min |
| Oct 3, 10:18 AM CDT | Wind Advisory | FSD | 11 hr |
| Oct 7, 3:37 PM CDT | Flood Watch | FSD | 54 hr |
| Oct 10, 3:18 PM CDT | Freeze Warning | FSD | 18 hr |
| Nov 28, 2:25 PM CST | Winter Storm Watch | FSD | 48 hr |
| Nov 29, 2:45 PM CST | Winter Storm Warning | FSD | 69 hr |
| Nov 29, 9:09 PM CST | Dense Fog Advisory | FSD | 15 hr |
| Dec 8, 2:00 AM CST | Dense Fog Advisory | FSD | 10 hr |
| Dec 25, 8:34 PM CST | Dense Fog Advisory | FSD | 6 hr |
| Dec 26, 3:25 AM CST | Winter Weather Advisory | FSD | 57 hr |
| Dec 26, 12:05 PM CST | Flood Watch | FSD | 31 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 | 5 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 21 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 5 |
| River Flood Warning | 2 |
| Flash Flood Watch | 5 |
| Flood Watch | 2 |
| Winter | |
| Blizzard Warning | 2 |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 6 |
| Winter Weather Advisory | 12 |
| Heat | |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.