Alert archive / Wisconsin / Kenosha County
Weather alerts in Kenosha County, Wisconsin, 2009
109 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Kenosha County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 109
- Warnings
- 24
- Watches
- 28
- Advisories
- 42
- Busiest month
- June21 alerts
- Busiest day
- June 19, 200912 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 Kenosha County in 2009 had a tornado report inside them; 3 of 3 tornado reports fell inside a warning, on average 10 minutes after it went out.
Kenosha County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 3 | 100% | 10 min |
| Severe thunderstorm warnings | 7 | 6 | 14% | 11 | 27% | 18 min |
| Flash flood warnings | 2 | 1 | 50% | 7 | 86% | 111 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Milwaukee, WI: tornado warnings | 15 | 7 | 53% | 12 | 83% | 20 min |
| NWS Milwaukee, WI: severe thunderstorm warnings | 53 | 36 | 32% | 128 | 71% | 25 min |
| NWS Milwaukee, WI: flash flood warnings | 14 | 9 | 36% | 37 | 89% | 73 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, 2:51 AM CST | Winter Weather Advisory | MKX | 25 hr |
| Jan 8, 2:00 PM CST | Winter Weather Advisory | MKX | 46 hr |
| Jan 12, 4:08 AM CST | Winter Weather Advisory | MKX | 26 hr |
| Jan 13, 3:31 AM CST | Winter Weather Advisory | MKX | 11 hr |
| Jan 13, 3:38 PM CST | Wind Chill Advisory | MKX | 12 hr |
| Jan 14, 3:41 AM CST | Wind Chill Warning | MKX | 56 hr |
| Jan 14, 9:49 AM CST | Lake Effect Snow Warning | MKX | 3 hr |
| Jan 16, 3:13 PM CST | Wind Chill Advisory | MKX | 8 hr |
| Jan 22, 7:32 AM CST | Freezing Fog Advisory | MKX | 4 hr |
| Feb 2, 3:31 PM CST | Lake Effect Snow Advisory | MKX | 19 hr |
| Feb 8, 10:20 AM CST | River Flood Warning | MKX | 8 days |
| Feb 9, 3:26 AM CST | Dense Fog Advisory | MKX | 4 hr |
| Feb 11, 5:40 AM CST | Dense Fog Advisory | MKX | 5 hr |
| Feb 20, 4:00 AM CST | Winter Storm Watch | MKX | 11 hr |
| Feb 20, 4:00 AM CST | Winter Weather Advisory | MKX | 40 hr |
| Feb 20, 2:46 PM CST | Winter Storm Warning | MKX | 27 hr |
| Feb 20, 11:57 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 21, 5:35 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 26, 3:38 AM CST | Flood Watch | MKX | 17 hr |
| Feb 26, 9:22 AM CST | River Flood Watch | MKX | 22 hr |
| Feb 26, 4:55 PM CST | Areal Flood Advisory | MKX | 4 hr |
| Feb 26, 5:10 PM CST | Dense Fog Advisory | MKX | 4 hr |
| Feb 26, 8:22 PM CST | River Flood Warning | MKX | 3 days |
| Mar 5, 8:12 PM CST | River Flood Watch | MKX | 25 hr |
| Mar 6, 9:25 PM CST | River Flood Warning | MKX | 13 days |
| Mar 7, 9:37 PM CST | Dense Fog Advisory | MKX | 8 hr |
| Mar 8, 3:51 AM CDT | Flash Flood Watch | MKX | 14 hr |
| Mar 9, 3:56 AM CDT | High Wind Watch | MKX | 16 hr |
| Mar 9, 7:58 PM CDT | Wind Advisory | MKX | 37 hr |
| Mar 10, 11:59 AM CDT | Dense Fog Advisory | MKX | 6 hr |
| Mar 24, 9:18 PM CDT | River Flood Watch | MKX | 36 hr |
| Mar 24, 10:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Mar 28, 4:04 AM CDT | Winter Storm Warning | MKX | 24 hr |
| Mar 28, 8:47 PM CDT | River Flood Watch | MKX | 24 hr |
| Mar 29, 3:42 AM CDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 29, 4:15 AM CDT | Winter Weather Advisory | MKX | 7 hr |
| Mar 31, 10:44 AM CDT | River Flood Watch | MKX | 6 hr |
| Mar 31, 4:15 PM CDT | River Flood Warning | MKX | 4 days |
| Apr 4, 3:49 AM CDT | Winter Weather Advisory | MKX | 36 hr |
| Apr 25, 9:49 AM CDT | River Flood Watch | MKX | 12 hr |
| Apr 25, 5:32 PM CDT | Mesoscale Discussion | SPC | 73 min |
| Apr 25, 9:46 PM CDT | River Flood Warning | MKX | 14 days |
| Apr 26, 7:44 AM CDT | Areal Flood Advisory | MKX | 3 hr |
| Apr 26, 11:16 AM CDT | Areal Flood Advisory | MKX | 104 min |
| Apr 30, 3:24 AM CDT | Dense Fog Advisory | MKX | 7 hr |
| May 13, 10:06 AM CDT | River Flood Watch | MKX | 20 hr |
| May 13, 10:12 PM CDT | Areal Flood Advisory | MKX | 105 min |
| May 14, 6:02 AM CDT | River Flood Warning | MKX | 4 days |
| May 16, 3:37 AM CDT | Frost Advisory | MKX | 28 hr |
| Jun 8, 1:23 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 8, 3:53 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jun 8, 3:58 PM CDT | Severe Thunderstorm Warning | MKX | 32 min |
| Jun 8, 4:00 PM CDT | Areal Flood Advisory | MKX | 56 min |
| Jun 18, 11:07 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 18, 11:30 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 19, 12:33 AM CDT | Flash Flood Warning | MKX | 4 hr |
| Jun 19, 1:23 AM CDT | Severe Thunderstorm Warning | MKX | 52 min |
| Jun 19, 2:38 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 19, 7:14 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 19, 9:47 AM CDT | River Flood Watch | MKX | 11 hr |
| Jun 19, 11:48 AM CDT | Flash Flood Watch | MKX | 14 hr |
| Jun 19, 4:54 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 19, 5:11 PM CDT | Flash Flood Warning | MKX | 5 hr |
| Jun 19, 5:41 PM CDT | Tornado Warning | MKX | 49 min |
| Jun 19, 6:43 PM CDT | Severe Thunderstorm Warning | MKX | 51 min |
| Jun 19, 7:10 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 19, 8:58 PM CDT | River Flood Warning | MKX | 9 days |
| Jun 22, 2:31 PM CDT | Heat Advisory | MKX | 28 hr |
| Jun 24, 4:21 AM CDT | Heat Advisory | MKX | 15 hr |
| Jun 27, 2:41 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 11, 2:31 AM CDT | Mesoscale Discussion | SPC | 29 min |
| Jul 23, 2:47 PM CDT | Severe Thunderstorm Warning | MKX | 36 min |
| Jul 23, 3:37 PM CDT | Severe Thunderstorm Warning | MKX | 33 min |
| Jul 27, 2:41 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 27, 6:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 30, 4:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Aug 8, 2:24 PM CDT | Heat Advisory | MKX | 24 hr |
| Aug 9, 10:21 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 9, 2:30 PM CDT | Flash Flood Watch | MKX | 11 hr |
| Aug 9, 3:40 PM CDT | Severe Thunderstorm Warning | MKX | 50 min |
| Aug 9, 5:01 PM CDT | Severe Thunderstorm Warning | MKX | 59 min |
| Aug 9, 5:52 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 9, 10:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Aug 9, 11:42 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 4, 3:39 AM CDT | Dense Fog Advisory | MKX | 5 hr |
| Sep 9, 8:59 PM CDT | Dense Fog Advisory | MKX | 12 hr |
| Sep 11, 12:27 AM CDT | Dense Fog Advisory | MKX | 9 hr |
| Sep 11, 9:12 PM CDT | Dense Fog Advisory | MKX | 12 hr |
| Sep 12, 9:27 PM CDT | Dense Fog Advisory | MKX | 10 hr |
| Sep 24, 3:42 AM CDT | Dense Fog Advisory | MKX | 6 hr |
| Sep 26, 3:35 PM CDT | Wind Advisory | MKX | 51 hr |
| Sep 27, 5:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Sep 27, 8:22 PM CDT | Tornado Watch | SPC | 3 hr |
| Oct 9, 4:05 AM CDT | Frost Advisory | MKX | 28 hr |
| Oct 9, 4:05 AM CDT | Freeze Watch | MKX | 11 hr |
| Oct 9, 3:02 PM CDT | Freeze Warning | MKX | 41 hr |
| Nov 22, 11:29 PM CST | Dense Fog Advisory | MKX | 4 hr |
| Nov 26, 8:06 PM CST | River Flood Watch | MKX | 13 hr |
| Dec 3, 11:27 AM CST | Winter Weather Advisory | MKX | 11 hr |
| Dec 6, 3:54 PM CST | Winter Storm Watch | MKX | 23 hr |
| Dec 7, 3:21 PM CST | Winter Storm Warning | MKX | 48 hr |
| Dec 9, 11:50 AM CST | Wind Chill Advisory | MKX | 23 hr |
| Dec 12, 2:49 PM CST | Freezing Rain Advisory | MKX | 18 hr |
| Dec 22, 11:17 AM CST | Winter Storm Watch | MKX | 17 hr |
| Dec 23, 3:54 AM CST | Winter Weather Advisory | MKX | 32 hr |
| Dec 25, 3:27 AM CST | Wind Advisory | MKX | 9 hr |
| Dec 25, 10:07 AM CST | River Flood Watch | MKX | 31 hr |
| Dec 25, 8:36 PM CST | River Flood Warning | MKX | 9 days |
| Dec 26, 9:28 AM CST | Winter Weather Advisory | MKX | 12 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 archive20082010
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.