Alert archive / Minnesota / Cottonwood County
Weather alerts in Cottonwood County, Minnesota, 2016
113 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Cottonwood County and its neighbors
Each county as a circle sized by its count in 2016. Tap one for its archive.
- Alerts
- 113
- Warnings
- 26
- Watches
- 20
- Advisories
- 41
- Busiest month
- July21 alerts
- Busiest day
- June 14, 20169 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 Cottonwood County in 2016 had a tornado report inside them.
Cottonwood County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 12 | 7 | 42% | 8 | 75% | 10 min |
| Flash flood warnings | 2 | 1 | 50% | 0 |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Sioux Falls, SD: tornado warnings | 10 | 1 | 90% | 6 | 17% | 6 min |
| NWS Sioux Falls, SD: severe thunderstorm warnings | 182 | 116 | 36% | 239 | 82% | 17 min |
| NWS Sioux Falls, SD: flash flood warnings | 34 | 13 | 62% | 23 | 100% | 64 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 3, 9:23 PM CST | Dense Fog Advisory | FSD | 13 hr |
| Jan 7, 7:57 AM CST | Dense Fog Advisory | FSD | 4 hr |
| Jan 9, 3:45 AM CST | Wind Chill Advisory | FSD | 31 hr |
| Jan 11, 3:12 AM CST | Wind Chill Advisory | FSD | 31 hr |
| Jan 15, 3:03 AM CST | Wind Chill Advisory | FSD | 33 hr |
| Jan 16, 3:32 AM CST | Wind Chill Warning | FSD | 32 hr |
| Jan 16, 3:32 AM CST | Wind Chill Advisory | FSD | 53 hr |
| Jan 31, 3:23 AM CST | Blizzard Watch | FSD | 35 hr |
| Feb 1, 3:38 AM CST | Blizzard Warning | FSD | 48 hr |
| Feb 2, 11:35 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 3, 3:56 AM CST | Winter Weather Advisory | FSD | 8 hr |
| Feb 5, 3:21 PM CST | Blizzard Watch | FSD | 37 hr |
| Feb 5, 10:52 PM CST | Dense Fog Advisory | FSD | 11 hr |
| Feb 6, 9:48 PM CST | Blizzard Warning | FSD | 44 hr |
| Feb 7, 10:21 PM CST | Winter Weather Advisory | FSD | 29 hr |
| Feb 12, 3:45 AM CST | Wind Chill Advisory | FSD | 29 hr |
| Feb 12, 3:37 PM CST | Winter Storm Watch | FSD | 12 hr |
| Feb 13, 3:48 AM CST | Winter Weather Advisory | FSD | 32 hr |
| Feb 18, 2:51 PM CST | High Wind Warning | FSD | 21 hr |
| Feb 18, 2:51 PM CST | Wind Advisory | FSD | 24 hr |
| Feb 19, 7:20 AM CST | Wind Advisory | FSD | 8 hr |
| Mar 13, 9:58 PM CDT | Dense Fog Advisory | FSD | 14 hr |
| Mar 15, 2:46 PM CDT | Wind Advisory | FSD | 28 hr |
| Mar 21, 3:37 PM CDT | Winter Storm Watch | FSD | 37 hr |
| Mar 22, 3:19 PM CDT | Winter Storm Warning | FSD | 40 hr |
| Mar 23, 7:15 PM CDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 1, 2:41 PM CDT | Wind Advisory | FSD | 20 hr |
| Apr 5, 4:00 PM CDT | Wind Advisory | FSD | 22 hr |
| Apr 6, 2:53 PM CDT | Wind Advisory | FSD | 27 hr |
| Apr 20, 2:10 AM CDT | Dense Fog Advisory | FSD | 8 hr |
| Apr 24, 1:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Apr 24, 2:28 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 24, 6:10 PM CDT | Mesoscale Discussion | SPC | 65 min |
| May 6, 3:19 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 11, 5:13 AM CDT | Dense Fog Advisory | FSD | 4 hr |
| May 13, 3:27 AM CDT | Freeze Warning | FSD | 30 hr |
| May 14, 2:25 PM CDT | Frost Advisory | FSD | 19 hr |
| May 23, 1:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| May 30, 5:14 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 3, 5:44 PM CDT | Severe Thunderstorm Warning | FSD | 46 min |
| Jun 9, 3:07 PM CDT | Heat Advisory | FSD | 54 hr |
| Jun 10, 12:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 14, 10:25 AM CDT | Flash Flood Watch | FSD | 6 hr |
| Jun 14, 11:45 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 12:43 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 14, 2:33 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 14, 2:40 PM CDT | Severe Thunderstorm Warning | FSD | 35 min |
| Jun 14, 2:45 PM CDT | Severe Thunderstorm Warning | FSD | 30 min |
| Jun 14, 2:48 PM CDT | Severe Thunderstorm Warning | FSD | 27 min |
| Jun 14, 3:03 PM CDT | Severe Thunderstorm Warning | FSD | 27 min |
| Jun 14, 3:10 PM CDT | Tornado Warning | FSD | 35 min |
| Jun 17, 2:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 17, 3:06 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 18, 3:14 AM CDT | Heat Advisory | FSD | 41 hr |
| Jun 25, 12:50 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jul 5, 2:06 PM CDT | Tornado Watch | SPC | 6 hr |
| Jul 5, 5:08 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jul 5, 7:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jul 6, 7:38 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 7, 1:50 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jul 10, 3:48 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 11, 3:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 11, 3:48 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 13, 7:48 AM CDT | Severe Thunderstorm Warning | FSD | 27 min |
| Jul 16, 5:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 16, 6:57 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 16, 8:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 16, 9:45 PM CDT | Flash Flood Watch | FSD | 6 hr |
| Jul 16, 10:06 PM CDT | Severe Thunderstorm Warning | FSD | 54 min |
| Jul 16, 10:58 PM CDT | Severe Thunderstorm Warning | FSD | 47 min |
| Jul 16, 11:02 PM CDT | Severe Thunderstorm Warning | FSD | 43 min |
| Jul 16, 11:35 PM CDT | Flash Flood Warning | FSD | 6 hr |
| Jul 16, 11:49 PM CDT | Severe Thunderstorm Warning | FSD | 41 min |
| Jul 16, 11:54 PM CDT | Severe Thunderstorm Warning | FSD | 44 min |
| Jul 18, 3:57 AM CDT | Excessive Heat Watch | FSD | 24 hr |
| Jul 19, 4:06 AM CDT | Excessive Heat Warning | FSD | 5 days |
| Aug 4, 3:58 AM CDT | Mesoscale Discussion | SPC | 62 min |
| Aug 11, 4:01 AM CDT | Flash Flood Watch | FSD | 18 hr |
| Aug 16, 3:19 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Aug 18, 2:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Aug 23, 2:05 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Sep 5, 1:10 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 5, 3:34 PM CDT | Flash Flood Watch | FSD | 15 hr |
| Sep 20, 2:32 PM CDT | Flash Flood Watch | FSD | 44 hr |
| Sep 20, 8:01 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 21, 2:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 21, 6:01 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 22, 6:31 AM CDT | Flash Flood Warning | FSD | 3 hr |
| Sep 24, 3:54 PM CDT | Severe Thunderstorm Warning | FSD | 36 min |
| Oct 7, 3:37 AM CDT | Frost Advisory | FSD | 29 hr |
| Oct 11, 2:59 PM CDT | Freeze Watch | FSD | 13 hr |
| Oct 12, 3:39 AM CDT | Freeze Warning | FSD | 29 hr |
| Oct 16, 3:48 PM CDT | Dense Fog Advisory | FSD | 19 hr |
| Nov 17, 3:34 AM CST | Winter Weather Advisory | FSD | 41 hr |
| Nov 21, 3:26 PM CST | Winter Weather Advisory | FSD | 33 hr |
| Nov 27, 1:59 AM CST | Dense Fog Advisory | FSD | 13 hr |
| Dec 6, 3:36 AM CST | Wind Advisory | FSD | 17 hr |
| Dec 9, 11:36 AM CST | Winter Weather Advisory | FSD | 43 hr |
| Dec 11, 8:30 PM CST | Wind Chill Advisory | FSD | 13 hr |
| Dec 12, 2:54 PM CST | Wind Chill Advisory | FSD | 18 hr |
| Dec 14, 3:35 AM CST | Wind Chill Advisory | FSD | 28 hr |
| Dec 14, 3:35 AM CST | Winter Storm Watch | FSD | 32 hr |
| Dec 15, 4:22 AM CST | Winter Storm Warning | FSD | 56 hr |
| Dec 16, 4:02 AM CST | Wind Chill Warning | FSD | 56 hr |
| Dec 18, 11:45 AM CST | Wind Chill Advisory | FSD | 11 hr |
| Dec 20, 8:31 PM CST | Wind Advisory | FSD | 21 hr |
| Dec 24, 12:00 AM CST | Dense Fog Advisory | FSD | 14 hr |
| Dec 24, 3:51 AM CST | Freezing Rain Advisory | FSD | 30 hr |
| Dec 24, 2:41 PM CST | Dense Fog Advisory | FSD | 13 hr |
| Dec 25, 3:07 PM CST | Wind Advisory | FSD | 27 hr |
| Dec 25, 8:54 PM CST | High Wind Warning | FSD | 18 hr |
| Dec 25, 8:54 PM CST | Wind Advisory | FSD | 21 hr |
| Dec 29, 3:27 AM CST | Wind Advisory | FSD | 14 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 archive20152017
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.