Alert archive / Minnesota / Dakota County
Weather alerts in Dakota County, Minnesota, 2011
141 weather alerts in 2011, 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 2011. Tap one for its archive.
- Alerts
- 141
- Warnings
- 42
- Watches
- 30
- Advisories
- 32
- Busiest month
- July46 alerts
- Busiest day
- August 1, 20118 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 3 tornado warnings covering Dakota County in 2011 had a tornado report inside them.
Dakota County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 23 | 13 | 43% | 5 | 60% | 58 min |
| Flash flood warnings | 2 | 0 | 100% | 1 | 0% |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Twin Cities, MN: tornado warnings | 44 | 10 | 77% | 29 | 76% | 10 min |
| NWS Twin Cities, MN: severe thunderstorm warnings | 258 | 128 | 50% | 450 | 75% | 29 min |
| NWS Twin Cities, MN: flash flood warnings | 16 | 6 | 63% | 23 | 48% | 68 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 19, 3:46 PM CST | Wind Chill Advisory | MPX | 44 hr |
| Jan 30, 4:01 AM CST | Winter Weather Advisory | MPX | 65 hr |
| Feb 1, 3:19 AM CST | Wind Chill Advisory | MPX | 33 hr |
| Feb 7, 3:35 AM CST | Wind Chill Advisory | MPX | 56 hr |
| Feb 8, 11:58 AM CST | Wind Chill Advisory | MPX | 24 hr |
| Feb 13, 3:07 AM CST | Wind Advisory | MPX | 27 hr |
| Feb 16, 6:36 PM CST | Dense Fog Advisory | MPX | 17 hr |
| Feb 18, 4:11 AM CST | Winter Storm Watch | MPX | 24 hr |
| Feb 19, 4:13 AM CST | Winter Storm Warning | MPX | 54 hr |
| Feb 21, 4:23 AM CST | Winter Weather Advisory | MPX | 14 hr |
| Mar 8, 3:59 AM CST | Winter Weather Advisory | MPX | 33 hr |
| Mar 11, 12:00 AM CST | Dense Fog Advisory | MPX | 9 hr |
| Mar 11, 4:16 AM CST | Wind Advisory | MPX | 32 hr |
| Mar 18, 11:52 AM CDT | River Flood Warning | MPX | 49 days |
| Mar 18, 12:07 PM CDT | River Flood Watch | MPX | 8 hr |
| Mar 18, 12:07 PM CDT | River Flood Watch | MPX | 27 hr |
| Mar 18, 1:25 PM CDT | River Flood Warning | MPX | 36 days |
| Mar 19, 2:28 AM CDT | Dense Fog Advisory | MPX | 8 hr |
| Mar 19, 12:53 PM CDT | River Flood Warning | MPX | 34 days |
| Mar 20, 3:32 PM CDT | Dense Fog Advisory | MPX | 9 hr |
| Mar 21, 3:30 PM CDT | Flood Watch | MPX | 31 hr |
| Mar 21, 8:20 PM CDT | River Flood Warning | MPX | 28 days |
| Mar 21, 8:20 PM CDT | River Flood Warning | MPX | 5 days |
| Mar 22, 12:33 PM CDT | Winter Weather Advisory | MPX | 30 hr |
| Apr 4, 11:36 AM CDT | River Flood Watch | MPX | 3 days |
| Apr 7, 12:08 PM CDT | River Flood Warning | MPX | 10 days |
| Apr 9, 7:42 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 10, 1:26 AM CDT | Mesoscale Discussion | SPC | 64 min |
| Apr 18, 4:09 AM CDT | Winter Storm Watch | MPX | 12 hr |
| Apr 18, 3:41 PM CDT | Winter Weather Advisory | MPX | 28 hr |
| May 9, 5:03 AM CDT | Special Weather Statement | MPX | 72 min |
| May 9, 5:33 AM CDT | Special Weather Statement | MPX | 2 hr |
| May 9, 6:18 AM CDT | Severe Thunderstorm Warning | MPX | 57 min |
| May 10, 5:10 PM CDT | Mesoscale Discussion | SPC | 95 min |
| May 10, 5:53 PM CDT | Tornado Watch | SPC | 6 hr |
| May 10, 7:24 PM CDT | Severe Thunderstorm Warning | MPX | 66 min |
| May 10, 7:54 PM CDT | Severe Thunderstorm Warning | MPX | 53 min |
| May 10, 8:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| May 15, 2:28 PM CDT | Frost Advisory | MPX | 17 hr |
| May 21, 4:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| May 22, 10:57 AM CDT | Special Weather Statement | MPX | 48 min |
| May 22, 12:07 PM CDT | Tornado Watch | SPC | 7 hr |
| May 22, 1:23 PM CDT | Severe Thunderstorm Warning | MPX | 67 min |
| May 23, 11:22 AM CDT | River Flood Watch | MPX | 71 hr |
| May 26, 10:20 AM CDT | River Flood Warning | MPX | 8 days |
| May 28, 2:11 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 28, 2:16 PM CDT | Severe Thunderstorm Warning | MPX | 44 min |
| May 28, 3:45 PM CDT | Severe Thunderstorm Warning | MPX | 45 min |
| May 28, 3:57 PM CDT | Tornado Warning | MPX | 33 min |
| May 28, 4:27 PM CDT | Special Weather Statement | MPX | 48 min |
| May 28, 4:35 PM CDT | Severe Thunderstorm Warning | MPX | 40 min |
| May 28, 5:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| May 30, 10:25 AM CDT | Severe Thunderstorm Warning | MPX | 50 min |
| May 31, 3:40 AM CDT | Wind Advisory | MPX | 18 hr |
| Jun 6, 1:08 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 6, 2:09 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 6, 3:24 PM CDT | Heat Advisory | MPX | 29 hr |
| Jun 15, 4:02 PM CDT | Special Weather Statement | MPX | 58 min |
| Jun 17, 11:34 PM CDT | Special Weather Statement | MPX | 56 min |
| Jun 18, 6:38 AM CDT | Special Weather Statement | MPX | 37 min |
| Jun 18, 11:58 AM CDT | Flood Watch | MPX | 20 hr |
| Jun 20, 10:52 AM CDT | River Flood Watch | MPX | 25 hr |
| Jun 21, 3:19 AM CDT | Areal Flood Advisory | MPX | 105 min |
| Jun 21, 11:15 AM CDT | River Flood Warning | MPX | 13 days |
| Jun 21, 1:46 PM CDT | Tornado Warning | MPX | 29 min |
| Jun 21, 2:11 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 21, 2:21 PM CDT | Tornado Warning | MPX | 24 min |
| Jun 29, 3:17 PM CDT | Heat Advisory | MPX | 53 hr |
| Jul 1, 2:08 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 1, 5:03 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Jul 1, 6:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 1, 7:49 PM CDT | Severe Thunderstorm Warning | MPX | 56 min |
| Jul 1, 7:59 PM CDT | Areal Flood Advisory | MPX | 105 min |
| Jul 1, 8:03 PM CDT | Severe Thunderstorm Warning | MPX | 57 min |
| Jul 1, 8:27 PM CDT | Severe Thunderstorm Warning | MPX | 63 min |
| Jul 10, 4:22 AM CDT | Severe Thunderstorm Warning | MPX | 68 min |
| Jul 10, 4:56 AM CDT | Areal Flood Advisory | MPX | 3 hr |
| Jul 10, 5:32 AM CDT | Severe Thunderstorm Warning | MPX | 58 min |
| Jul 10, 5:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 10, 6:12 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 10, 7:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 10, 9:46 PM CDT | Special Weather Statement | MPX | 74 min |
| Jul 10, 9:53 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jul 10, 10:17 PM CDT | Severe Thunderstorm Warning | MPX | 58 min |
| Jul 10, 11:13 PM CDT | Severe Thunderstorm Warning | MPX | 47 min |
| Jul 10, 11:39 PM CDT | Severe Thunderstorm Warning | MPX | 51 min |
| Jul 15, 3:40 AM CDT | Excessive Heat Watch | MPX | 36 hr |
| Jul 15, 11:20 AM CDT | Mesoscale Discussion | SPC | 85 min |
| Jul 15, 12:41 PM CDT | Severe Thunderstorm Warning | MPX | 52 min |
| Jul 15, 12:52 PM CDT | Flood Watch | MPX | 13 hr |
| Jul 15, 3:35 PM CDT | Flash Flood Warning | MPX | 3 hr |
| Jul 15, 3:46 PM CDT | Excessive Heat Warning | MPX | 5 days |
| Jul 15, 3:50 PM CDT | Flash Flood Warning | MPX | 3 hr |
| Jul 16, 10:28 AM CDT | River Flood Warning | MPX | 6 days |
| Jul 17, 1:27 PM CDT | Flash Flood Watch | MPX | 13 hr |
| Jul 19, 9:07 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 19, 11:11 AM CDT | Areal Flood Advisory | MPX | 3 hr |
| Jul 19, 11:25 AM CDT | Severe Thunderstorm Warning | MPX | 65 min |
| Jul 22, 3:00 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 23, 9:17 AM CDT | Severe Thunderstorm Warning | MPX | 58 min |
| Jul 23, 1:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 23, 11:46 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 26, 9:53 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jul 26, 10:10 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 27, 12:04 AM CDT | Flash Flood Watch | MPX | 9 hr |
| Jul 27, 2:49 AM CDT | Mesoscale Discussion | SPC | 56 min |
| Jul 30, 11:28 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 30, 1:28 PM CDT | Severe Thunderstorm Watch | SPC | 112 min |
| Jul 30, 5:31 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 30, 8:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 30, 9:54 PM CDT | Areal Flood Advisory | MPX | 6 hr |
| Jul 30, 11:07 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jul 31, 2:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 31, 4:00 PM CDT | Heat Advisory | MPX | 28 hr |
| Aug 1, 7:31 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Aug 1, 11:29 AM CDT | Mesoscale Discussion | SPC | 31 min |
| Aug 1, 11:52 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 1, 1:01 PM CDT | Areal Flood Advisory | MPX | 3 hr |
| Aug 1, 1:18 PM CDT | Severe Thunderstorm Warning | MPX | 57 min |
| Aug 1, 1:25 PM CDT | Severe Thunderstorm Warning | MPX | 65 min |
| Aug 1, 1:50 PM CDT | Mesoscale Discussion | SPC | 25 min |
| Aug 1, 3:53 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Aug 2, 5:23 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 6, 9:45 PM CDT | Severe Thunderstorm Warning | MPX | 45 min |
| Aug 13, 3:46 PM CDT | Special Weather Statement | MPX | 89 min |
| Aug 23, 3:34 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 23, 3:40 AM CDT | Special Weather Statement | MPX | 50 min |
| Aug 23, 4:55 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 23, 5:30 AM CDT | Severe Thunderstorm Warning | MPX | 46 min |
| Sep 13, 2:29 PM CDT | Freeze Warning | MPX | 42 hr |
| Sep 19, 2:10 PM CDT | Wind Advisory | MPX | 35 hr |
| Sep 28, 2:52 PM CDT | Wind Advisory | MPX | 28 hr |
| Sep 30, 4:07 AM CDT | Frost Advisory | MPX | 28 hr |
| Oct 3, 2:22 PM CDT | Red Flag Warning | MPX | 3 days |
| Oct 5, 4:22 PM CDT | Wind Advisory | MPX | 54 hr |
| Oct 6, 2:24 PM CDT | Fire Weather Watch | MPX | 14 hr |
| Oct 7, 4:50 AM CDT | Red Flag Warning | MPX | 16 hr |
| Oct 12, 12:11 PM CDT | Special Weather Statement | MPX | 64 min |
| Nov 3, 2:19 PM CDT | Fire Weather Watch | MPX | 14 hr |
| Nov 18, 2:50 PM CST | Winter Weather Advisory | MPX | 30 hr |
| Dec 3, 3:04 AM CST | Winter Weather Advisory | MPX | 24 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 archive20102012
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.