Alert archive / Nebraska / Dakota County
Weather alerts in Dakota County, Nebraska, 2008
138 weather alerts in 2008, 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 2008. Tap one for its archive.
- Alerts
- 138
- Warnings
- 23
- Watches
- 26
- Advisories
- 37
- Busiest month
- June37 alerts
- Busiest day
- June 5, 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.
1 of 1 tornado warnings covering Dakota County in 2008 had a tornado report inside them.
Dakota County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 0 | ||
| Severe thunderstorm warnings | 12 | 9 | 25% | 4 | 100% | 38 min |
| Flash flood warnings | 2 | 1 | 50% | 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 11, 5:17 AM CST | Dense Fog Advisory | FSD | 6 hr |
| Jan 17, 10:39 AM CST | Wind Chill Advisory | FSD | 52 hr |
| Jan 19, 3:16 PM CST | Snow Advisory | FSD | 51 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, 3:51 PM CST | Snow Advisory | FSD | 20 hr |
| Feb 3, 9:38 PM CST | Winter Weather Advisory | FSD | 17 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 10, 9:43 PM CST | Snow Advisory | FSD | 29 hr |
| Feb 11, 12:32 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 17, 12:25 PM CST | Wind Advisory | FSD | 7 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, 3:58 PM CST | Winter Weather Advisory | FSD | 26 hr |
| Feb 25, 9:30 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Mar 2, 3:34 AM CST | Wind Advisory | FSD | 14 hr |
| Mar 17, 7:25 PM CDT | Dense Fog Advisory | FSD | 15 hr |
| Apr 14, 3:53 PM CDT | Wind Advisory | FSD | 29 hr |
| Apr 21, 11:54 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 1, 3:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| 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 6, 4:21 PM CDT | Severe Thunderstorm Warning | FSD | 39 min |
| May 10, 3:22 AM CDT | Wind Advisory | FSD | 25 hr |
| May 17, 12:16 PM CDT | Wind Advisory | FSD | 8 hr |
| May 24, 3:08 PM CDT | Tornado Watch | SPC | 6 hr |
| May 24, 6:33 PM CDT | Mesoscale Discussion | SPC | 117 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, 5:32 AM CDT | Mesoscale Discussion | SPC | 118 min |
| May 29, 5:07 PM CDT | Mesoscale Discussion | SPC | 23 min |
| May 29, 5:26 PM CDT | Tornado Watch | SPC | 6 hr |
| May 29, 10:21 PM CDT | Mesoscale Discussion | SPC | 24 min |
| Jun 3, 1:57 AM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 3, 2:12 AM CDT | Severe Thunderstorm Warning | FSD | 29 min |
| Jun 3, 4:12 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 4, 3:00 PM CDT | Flash Flood Watch | FSD | 12 hr |
| Jun 4, 11:02 PM CDT | High Wind Warning | FSD | 96 min |
| Jun 4, 11:56 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 5, 10:11 AM CDT | Mesoscale Discussion | SPC | 94 min |
| 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, 12:09 PM CDT | Severe Thunderstorm Warning | FSD | 36 min |
| Jun 5, 5:10 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 5, 5:50 PM CDT | Tornado Watch | SPC | 7 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 7, 11:01 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jun 7, 11:11 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 8, 2:29 AM CDT | Mesoscale Discussion | SPC | 31 min |
| Jun 11, 10:22 AM CDT | Wind Advisory | FSD | 5 hr |
| Jun 11, 2:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jun 11, 2:52 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 11, 5:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 11, 8:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 19, 1:14 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Jun 19, 1:32 PM CDT | Severe Thunderstorm Warning | FSD | 28 min |
| Jun 19, 6:11 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 21, 3:05 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 21, 7:41 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 26, 3:48 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 26, 6:38 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 26, 6:50 AM CDT | Flash Flood Warning | FSD | 2 hr |
| Jun 26, 6:56 AM CDT | Severe Thunderstorm Warning | FSD | 49 min |
| Jun 26, 7:51 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 26, 9:53 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 26, 12:05 PM CDT | Mesoscale Discussion | SPC | 55 min |
| 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 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, 4:41 PM CDT | Tornado Warning | FSD | 34 min |
| Jul 6, 11:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 9, 1:33 PM CDT | Mesoscale Discussion | SPC | 57 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 12, 3:26 AM CDT | Mesoscale Discussion | SPC | 64 min |
| Jul 17, 12:04 PM CDT | Mesoscale Discussion | SPC | 116 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, 7:00 PM CDT | Severe Thunderstorm Warning | FSD | 45 min |
| Jul 20, 10:04 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Jul 20, 7:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 20, 8:58 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 20, 11:10 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 20, 11:53 PM CDT | Severe Thunderstorm Warning | FSD | 52 min |
| Jul 21, 12:16 AM CDT | Flash Flood Warning | FSD | 3 hr |
| Jul 21, 12:34 AM CDT | Severe Thunderstorm Warning | FSD | 41 min |
| Jul 21, 12:49 AM CDT | Severe Thunderstorm Warning | FSD | 26 min |
| Jul 21, 4:01 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 23, 10:45 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 24, 1:46 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 27, 1:02 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 27, 2:29 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 2, 10:13 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Aug 2, 11:13 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 13, 4:37 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Aug 27, 3:24 AM CDT | Severe Thunderstorm Warning | FSD | 22 min |
| Aug 27, 4:40 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Aug 27, 4:48 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Aug 27, 10:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 28, 1:11 AM CDT | Severe Thunderstorm Warning | FSD | 34 min |
| Sep 28, 9:20 PM CDT | Severe Thunderstorm Warning | FSD | 40 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 5, 2:51 PM CST | Mesoscale Discussion | SPC | 114 min |
| Nov 6, 3:30 AM CST | Wind Advisory | FSD | 39 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 11, 9:24 AM CST | Winter Weather Advisory | FSD | 3 hr |
| Nov 12, 2:50 AM CST | Dense Fog Advisory | FSD | 7 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, 4:27 AM CST | Wind Advisory | FSD | 11 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 19, 4:25 AM CST | Winter Weather Advisory | FSD | 32 hr |
| Dec 19, 4:08 PM CST | Blizzard Warning | FSD | 47 hr |
| Dec 20, 3:59 PM CST | Wind Chill Warning | FSD | 29 hr |
| Dec 26, 9:06 AM CST | Dense Fog Advisory | FSD | 4 hr |
| Dec 29, 3:04 PM CST | Wind Advisory | FSD | 20 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 | 12 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 11 |
| Tornado Watch | 7 |
| Mesoscale Discussion | 52 |
| Flooding | |
| Flash Flood Warning | 2 |
| Flash Flood Watch | 5 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 1 |
| Blizzard Watch | 1 |
| Winter Storm Watch | 1 |
| Snow Advisory | 3 |
| Winter Weather Advisory | 11 |
| Cold | |
| Freeze Warning | 2 |
| Wind Chill Warning | 2 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 5 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 1 |
| Wind Advisory | 13 |
| 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 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.