Alert archive / Wisconsin / Lafayette County
Weather alerts in Lafayette County, Wisconsin, 2017
137 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Lafayette County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 137
- Warnings
- 32
- Watches
- 15
- Advisories
- 32
- Busiest month
- July32 alerts
- Busiest day
- June 17, 20177 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 2 tornado warnings covering Lafayette County in 2017 had a tornado report inside them.
Lafayette County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 1 | 50% | 0 | ||
| Severe thunderstorm warnings | 18 | 14 | 22% | 15 | 93% | 33 min |
| Flash flood warnings | 3 | 2 | 33% | 7 | 29% | 370 min |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Milwaukee, WI: tornado warnings | 7 | 1 | 86% | 7 | 43% | 22 min |
| NWS Milwaukee, WI: severe thunderstorm warnings | 146 | 88 | 40% | 296 | 74% | 21 min |
| NWS Milwaukee, WI: flash flood warnings | 7 | 6 | 14% | 27 | 74% | 272 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 2, 9:38 PM CST | Dense Fog Advisory | MKX | 12 hr |
| Jan 10, 3:46 AM CST | Winter Weather Advisory | MKX | 6 hr |
| Jan 10, 3:55 AM CST | Wind Advisory | MKX | 20 hr |
| Jan 11, 3:54 AM CST | Winter Weather Advisory | MKX | 17 hr |
| Jan 11, 3:07 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 15, 2:31 PM CST | Winter Weather Advisory | MKX | 45 hr |
| Jan 19, 2:35 AM CST | Dense Fog Advisory | MKX | 9 hr |
| Jan 20, 10:37 AM CST | River Flood Warning | MKX | 40 hr |
| Jan 20, 2:25 PM CST | Dense Fog Advisory | MKX | 46 hr |
| Jan 24, 3:34 AM CST | Winter Weather Advisory | MKX | 44 hr |
| Feb 6, 9:00 PM CST | Dense Fog Advisory | MKX | 17 hr |
| Feb 21, 7:28 PM CST | Dense Fog Advisory | MKX | 13 hr |
| Feb 23, 2:32 PM CST | Winter Weather Advisory | MKX | 39 hr |
| Mar 6, 2:53 PM CST | Wind Advisory | MKX | 42 hr |
| Mar 6, 7:42 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 6, 10:00 PM CST | Severe Thunderstorm Warning | MKX | 45 min |
| Mar 6, 10:42 PM CST | Severe Thunderstorm Warning | MKX | 33 min |
| Mar 6, 11:13 PM CST | Severe Thunderstorm Warning | MKX | 47 min |
| Mar 7, 5:42 PM CST | Special Weather Statement | MKX | 33 min |
| Mar 7, 6:19 PM CST | Special Weather Statement | MKX | 41 min |
| Mar 8, 9:08 AM CST | High Wind Warning | MKX | 8 hr |
| Mar 11, 2:45 PM CST | Winter Storm Watch | MKX | 12 hr |
| Mar 11, 2:45 PM CST | Winter Weather Advisory | MKX | 56 hr |
| Mar 23, 4:37 PM CDT | Special Weather Statement | MKX | 53 min |
| Mar 23, 4:59 PM CDT | Special Weather Statement | MKX | 46 min |
| Mar 23, 5:48 PM CDT | Severe Thunderstorm Warning | MKX | 42 min |
| Mar 23, 6:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Mar 26, 5:22 AM CDT | Dense Fog Advisory | MKX | 7 hr |
| Apr 10, 2:16 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Apr 10, 1:48 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 10, 1:52 PM CDT | Special Weather Statement | MKX | 38 min |
| Apr 10, 2:21 PM CDT | Severe Thunderstorm Warning | MKX | 39 min |
| Apr 15, 5:06 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Apr 19, 10:06 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Apr 27, 2:39 PM CDT | Frost Advisory | MKX | 17 hr |
| May 2, 3:10 AM CDT | Frost Advisory | MKX | 29 hr |
| May 6, 2:59 AM CDT | Frost Advisory | MKX | 28 hr |
| May 7, 3:30 AM CDT | Frost Advisory | MKX | 28 hr |
| May 15, 5:52 PM CDT | Mesoscale Discussion | SPC | 113 min |
| May 15, 7:19 PM CDT | Mesoscale Discussion | SPC | 56 min |
| May 15, 7:52 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| May 15, 7:57 PM CDT | Severe Thunderstorm Warning | MKX | 63 min |
| May 15, 8:44 PM CDT | Severe Thunderstorm Warning | MKX | 61 min |
| May 15, 8:47 PM CDT | Severe Thunderstorm Warning | MKX | 58 min |
| May 17, 12:23 PM CDT | Mesoscale Discussion | SPC | 97 min |
| May 17, 3:13 PM CDT | Tornado Watch | SPC | 9 hr |
| May 17, 7:27 PM CDT | Severe Thunderstorm Warning | MKX | 33 min |
| May 17, 7:54 PM CDT | Severe Thunderstorm Warning | MKX | 36 min |
| May 17, 8:20 PM CDT | Severe Thunderstorm Warning | MKX | 40 min |
| May 22, 6:31 PM CDT | Special Weather Statement | MKX | 14 min |
| May 22, 6:42 PM CDT | Special Weather Statement | MKX | 18 min |
| May 22, 7:34 PM CDT | Special Weather Statement | MKX | 26 min |
| May 22, 7:50 PM CDT | Special Weather Statement | MKX | 25 min |
| May 22, 8:48 PM CDT | Special Weather Statement | MKX | 27 min |
| Jun 12, 4:37 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 12, 6:31 PM CDT | Special Weather Statement | MKX | 29 min |
| Jun 12, 6:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 12:06 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 12:40 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 14, 1:37 PM CDT | Severe Thunderstorm Warning | MKX | 38 min |
| Jun 14, 8:35 PM CDT | Special Weather Statement | MKX | 25 min |
| Jun 16, 6:56 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 16, 10:25 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 16, 10:32 PM CDT | Severe Thunderstorm Warning | MKX | 43 min |
| Jun 16, 11:12 PM CDT | Special Weather Statement | MKX | 48 min |
| Jun 17, 12:04 AM CDT | Special Weather Statement | MKX | 26 min |
| Jun 17, 1:35 AM CDT | Mesoscale Discussion | SPC | 115 min |
| Jun 17, 6:05 PM CDT | Special Weather Statement | MKX | 25 min |
| Jun 17, 6:09 PM CDT | Tornado Warning | MKX | 36 min |
| Jun 23, 1:12 AM CDT | Special Weather Statement | MKX | 78 min |
| Jun 28, 5:00 PM CDT | Mesoscale Discussion | SPC | 30 min |
| Jun 28, 5:14 PM CDT | Tornado Watch | SPC | 4 hr |
| Jun 28, 5:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 28, 5:43 PM CDT | Severe Thunderstorm Warning | MKX | 62 min |
| Jun 28, 6:33 PM CDT | Tornado Warning | MKX | 42 min |
| Jun 28, 7:10 PM CDT | Areal Flood Advisory | MKX | 110 min |
| Jun 28, 7:18 PM CDT | Flash Flood Warning | MKX | 3 hr |
| Jun 28, 7:53 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 28, 9:59 PM CDT | Special Weather Statement | MKX | 31 min |
| Jun 28, 10:20 PM CDT | Severe Thunderstorm Warning | MKX | 25 min |
| Jun 28, 10:44 PM CDT | Severe Thunderstorm Warning | MKX | 31 min |
| Jun 30, 12:15 AM CDT | Special Weather Statement | MKX | 45 min |
| Jul 11, 12:19 PM CDT | Flash Flood Watch | MKX | 22 hr |
| Jul 11, 8:42 PM CDT | Special Weather Statement | MKX | 63 min |
| Jul 11, 9:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 12, 12:55 AM CDT | Special Weather Statement | MKX | 50 min |
| Jul 12, 1:02 PM CDT | Special Weather Statement | MKX | 28 min |
| Jul 12, 4:18 PM CDT | River Flood Warning | MKX | 51 hr |
| Jul 15, 5:53 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 15, 11:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 16, 12:29 AM CDT | Special Weather Statement | MKX | 61 min |
| Jul 19, 5:11 PM CDT | Mesoscale Discussion | SPC | 34 min |
| Jul 19, 5:45 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 19, 6:32 PM CDT | Severe Thunderstorm Warning | MKX | 73 min |
| Jul 19, 8:19 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jul 20, 3:12 AM CDT | Areal Flood Advisory | MKX | 3 hr |
| Jul 20, 5:07 AM CDT | Special Weather Statement | MKX | 38 min |
| Jul 20, 10:04 AM CDT | River Flood Warning | MKX | 34 hr |
| Jul 20, 10:04 AM CDT | River Flood Warning | MKX | 4 days |
| Jul 20, 1:30 PM CDT | Flash Flood Watch | MKX | 41 hr |
| Jul 21, 12:42 PM CDT | Special Weather Statement | MKX | 63 min |
| Jul 21, 4:52 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 21, 5:04 PM CDT | Special Weather Statement | MKX | 71 min |
| Jul 21, 5:31 PM CDT | Special Weather Statement | MKX | 29 min |
| Jul 21, 6:02 PM CDT | Special Weather Statement | MKX | 28 min |
| Jul 21, 6:23 PM CDT | Special Weather Statement | MKX | 22 min |
| Jul 21, 6:44 PM CDT | Special Weather Statement | MKX | 31 min |
| Jul 21, 7:02 PM CDT | Flash Flood Warning | MKX | 5 hr |
| Jul 21, 9:07 PM CDT | River Flood Warning | MKX | 65 hr |
| Jul 21, 10:54 PM CDT | Flash Flood Warning | MKX | 11 hr |
| Jul 21, 11:34 PM CDT | Special Weather Statement | MKX | 26 min |
| Jul 22, 10:08 AM CDT | Areal Flood Warning | MKX | 6 hr |
| Jul 22, 3:43 PM CDT | Areal Flood Warning | MKX | 18 hr |
| Jul 27, 2:58 AM CDT | Dense Fog Advisory | MKX | 4 hr |
| Aug 3, 12:03 PM CDT | Special Weather Statement | MKX | 42 min |
| Aug 3, 12:39 PM CDT | Special Weather Statement | MKX | 51 min |
| Aug 3, 4:26 PM CDT | Special Weather Statement | MKX | 34 min |
| Aug 3, 5:18 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 1:37 PM CDT | Special Weather Statement | MKX | 23 min |
| Aug 10, 1:58 PM CDT | Special Weather Statement | MKX | 32 min |
| Aug 10, 2:02 PM CDT | Severe Thunderstorm Warning | MKX | 43 min |
| Aug 10, 2:07 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Aug 29, 2:34 AM CDT | Dense Fog Advisory | MKX | 6 hr |
| Aug 30, 2:57 AM CDT | Dense Fog Advisory | MKX | 6 hr |
| Sep 2, 9:55 PM CDT | Dense Fog Advisory | MKX | 11 hr |
| Sep 20, 3:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Oct 7, 3:46 PM CDT | Special Weather Statement | MKX | 59 min |
| Oct 14, 3:42 AM CDT | Flash Flood Watch | MKX | 16 hr |
| Oct 23, 1:47 AM CDT | Dense Fog Advisory | MKX | 8 hr |
| Oct 23, 2:10 PM CDT | Wind Advisory | MKX | 25 hr |
| Oct 25, 3:08 AM CDT | Frost Advisory | MKX | 29 hr |
| Oct 27, 2:10 PM CDT | Freeze Warning | MKX | 43 hr |
| Nov 2, 2:52 AM CDT | Dense Fog Advisory | MKX | 7 hr |
| Nov 12, 9:27 PM CST | Dense Fog Advisory | MKX | 13 hr |
| Dec 4, 3:02 AM CST | Wind Advisory | MKX | 39 hr |
| Dec 24, 1:50 PM CST | Wind Chill Advisory | MKX | 70 hr |
| Dec 29, 1:27 PM CST | Wind Chill Advisory | MKX | 47 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 | 18 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 22 |
| Special Weather Statement | 36 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 3 |
| River Flood Warning | 5 |
| Flash Flood Watch | 3 |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 6 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 5 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 13 |
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.