Alert archive / Minnesota / Nicollet County
Weather alerts in Nicollet County, Minnesota, 2017
109 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Nicollet County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 109
- Warnings
- 22
- Watches
- 20
- Advisories
- 30
- Busiest month
- July23 alerts
- Busiest day
- July 10, 201711 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
4 of 5 tornado warnings covering Nicollet County in 2017 had a tornado report inside them; 4 of 5 tornado reports fell inside a warning, on average 24 minutes after it went out.
Nicollet County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 5 | 4 | 20% | 5 | 80% | 24 min |
| Severe thunderstorm warnings | 10 | 4 | 60% | 10 | 80% | 29 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Twin Cities, MN: tornado warnings | 40 | 18 | 55% | 38 | 76% | 28 min |
| NWS Twin Cities, MN: severe thunderstorm warnings | 210 | 92 | 56% | 400 | 65% | 24 min |
| NWS Twin Cities, MN: flash flood warnings | 6 | 2 | 67% | 3 | 100% | 107 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, 3:40 AM CST | Winter Weather Advisory | MPX | 50 hr |
| Jan 4, 2:30 PM CST | Wind Chill Advisory | MPX | 22 hr |
| Jan 5, 2:10 PM CST | Wind Chill Advisory | MPX | 20 hr |
| Jan 10, 3:28 AM CST | Winter Weather Advisory | MPX | 18 hr |
| Jan 12, 2:43 PM CST | Wind Chill Advisory | MPX | 15 hr |
| Jan 14, 4:09 AM CST | Winter Storm Watch | MPX | 35 hr |
| Jan 15, 3:17 PM CST | Winter Weather Advisory | MPX | 45 hr |
| Jan 16, 1:53 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 18, 11:41 PM CST | Dense Fog Advisory | MPX | 12 hr |
| Jan 19, 6:55 PM CST | Dense Fog Advisory | MPX | 11 hr |
| Jan 20, 2:51 PM CST | Dense Fog Advisory | MPX | 45 hr |
| Jan 22, 2:54 PM CST | Winter Storm Watch | MPX | 37 hr |
| Jan 24, 3:26 AM CST | Winter Weather Advisory | MPX | 39 hr |
| Jan 30, 2:51 AM CST | Wind Advisory | MPX | 19 hr |
| Feb 21, 3:30 PM CST | Winter Storm Watch | MPX | 45 hr |
| Feb 22, 3:26 PM CST | Blizzard Watch | MPX | 21 hr |
| Feb 23, 4:27 AM CST | Blizzard Warning | MPX | 34 hr |
| Feb 23, 11:54 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Mar 5, 2:42 PM CST | High Wind Watch | MPX | 36 hr |
| Mar 6, 4:04 AM CST | Wind Advisory | MPX | 60 hr |
| Mar 6, 1:37 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 6, 2:43 PM CST | Tornado Watch | SPC | 7 hr |
| Mar 6, 3:35 PM CST | Mesoscale Discussion | SPC | 115 min |
| Mar 8, 2:23 AM CST | Wind Advisory | MPX | 14 hr |
| Mar 10, 3:54 PM CST | Winter Storm Watch | MPX | 30 hr |
| Mar 11, 3:18 PM CST | Winter Storm Warning | MPX | 41 hr |
| Mar 12, 12:48 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 3, 4:08 AM CDT | Dense Fog Advisory | MPX | 8 hr |
| Apr 9, 3:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| May 8, 6:34 PM CDT | Mesoscale Discussion | SPC | 116 min |
| May 15, 8:50 PM CDT | Mesoscale Discussion | SPC | 115 min |
| May 15, 9:48 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 16, 2:13 AM CDT | Mesoscale Discussion | SPC | 92 min |
| May 16, 3:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 16, 4:08 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 17, 2:53 PM CDT | Tornado Watch | SPC | 6 hr |
| May 17, 4:03 PM CDT | Severe Thunderstorm Warning | MPX | 27 min |
| May 17, 4:11 PM CDT | Tornado Warning | MPX | 19 min |
| May 17, 5:00 PM CDT | Special Weather Statement | MPX | 30 min |
| May 17, 5:01 PM CDT | Flash Flood Warning | MPX | 119 min |
| May 28, 6:52 PM CDT | Special Weather Statement | MPX | 38 min |
| Jun 2, 5:49 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 2, 7:24 PM CDT | Special Weather Statement | MPX | 36 min |
| Jun 9, 8:03 PM CDT | Heat Advisory | MPX | 24 hr |
| Jun 10, 9:25 AM CDT | Wind Advisory | MPX | 7 hr |
| Jun 11, 2:02 AM CDT | Mesoscale Discussion | SPC | 58 min |
| Jun 11, 5:51 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 11, 6:28 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 11, 8:24 AM CDT | Special Weather Statement | MPX | 51 min |
| Jun 11, 10:59 PM CDT | Dense Fog Advisory | MPX | 9 hr |
| Jun 12, 11:47 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 12, 2:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 13, 7:01 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 13, 11:13 PM CDT | Special Weather Statement | MPX | 47 min |
| Jun 16, 3:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 22, 3:11 AM CDT | Mesoscale Discussion | SPC | 64 min |
| Jul 9, 3:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 9, 7:05 PM CDT | Tornado Watch | SPC | 7 hr |
| Jul 9, 9:03 PM CDT | Severe Thunderstorm Warning | MPX | 42 min |
| Jul 9, 9:10 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Jul 9, 9:11 PM CDT | Severe Thunderstorm Warning | MPX | 49 min |
| Jul 9, 9:26 PM CDT | Severe Thunderstorm Warning | MPX | 49 min |
| Jul 9, 9:30 PM CDT | Tornado Warning | MPX | 30 min |
| Jul 9, 10:10 PM CDT | Severe Thunderstorm Warning | MPX | 35 min |
| Jul 9, 10:34 PM CDT | Severe Thunderstorm Warning | MPX | 41 min |
| Jul 9, 11:39 PM CDT | Severe Thunderstorm Warning | MPX | 37 min |
| Jul 9, 11:45 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Jul 10, 12:47 AM CDT | Severe Thunderstorm Warning | MPX | 26 min |
| Jul 11, 10:00 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 12, 1:49 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 3:27 AM CDT | Heat Advisory | MPX | 16 hr |
| Jul 19, 12:11 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 19, 12:36 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 19, 2:46 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 19, 3:11 PM CDT | Severe Thunderstorm Warning | MPX | 34 min |
| Jul 25, 4:03 AM CDT | Heat Advisory | MPX | 15 hr |
| Jul 25, 3:21 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 25, 3:46 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 25, 6:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Aug 16, 4:37 PM CDT | Tornado Warning | MPX | 23 min |
| Aug 16, 5:09 PM CDT | Tornado Warning | MPX | 36 min |
| Aug 16, 5:14 PM CDT | Tornado Warning | MPX | 46 min |
| Aug 16, 5:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Aug 17, 2:04 AM CDT | High Wind Warning | MPX | 88 min |
| Aug 17, 3:32 AM CDT | Wind Advisory | MPX | 4 hr |
| Aug 18, 2:54 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 18, 4:51 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 18, 6:58 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Aug 21, 1:05 PM CDT | Special Weather Statement | MPX | 40 min |
| Sep 19, 10:10 PM CDT | Mesoscale Discussion | SPC | 35 min |
| Sep 19, 10:36 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 20, 1:03 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Sep 20, 1:15 AM CDT | Severe Thunderstorm Warning | MPX | 30 min |
| Sep 21, 2:58 PM CDT | Heat Advisory | MPX | 28 hr |
| Sep 23, 3:28 PM CDT | Special Weather Statement | MPX | 32 min |
| Sep 24, 4:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Oct 2, 3:21 AM CDT | Flash Flood Watch | MPX | 27 hr |
| Oct 9, 2:53 AM CDT | Frost Advisory | MPX | 30 hr |
| Oct 19, 5:38 AM CDT | Red Flag Warning | MPX | 13 hr |
| Oct 23, 11:05 AM CDT | Wind Advisory | MPX | 31 hr |
| Oct 26, 4:08 AM CDT | Winter Weather Advisory | MPX | 39 hr |
| Nov 20, 2:29 PM CST | Wind Advisory | MPX | 20 hr |
| Nov 28, 12:39 PM CST | Red Flag Warning | MPX | 4 hr |
| Dec 3, 3:10 PM CST | Wind Advisory | MPX | 39 hr |
| Dec 3, 3:22 PM CST | Winter Weather Advisory | MPX | 37 hr |
| Dec 12, 2:43 PM CST | Wind Advisory | MPX | 27 hr |
| Dec 21, 10:33 AM CST | Winter Weather Advisory | MPX | 9 hr |
| Dec 24, 2:16 PM CST | Wind Chill Advisory | MPX | 67 hr |
| Dec 29, 3:03 AM CST | Wind Chill Warning | MPX | 3 days |
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 | 10 |
| Tornado Warning | 5 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 30 |
| Special Weather Statement | 7 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 1 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 1 |
| Blizzard Watch | 1 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 7 |
| Heat | |
| Heat Advisory | 4 |
| Cold | |
| Wind Chill Warning | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 9 |
| Fire | |
| Red Flag Warning | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.