Alert archive / Wisconsin / Jefferson County
Weather alerts in Jefferson County, Wisconsin, 2013
120 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Jefferson County and its neighbors
Each county as a circle sized by its count in 2013. Tap one for its archive.
- Alerts
- 120
- Warnings
- 31
- Watches
- 20
- Advisories
- 45
- Busiest month
- May21 alerts
- Busiest day
- April 9, 20136 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Jefferson County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 11 | 21% | 9 | 56% | 37 min |
| Flash flood warnings | 1 | 1 | 0% | 1 | 100% | 24 min |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Milwaukee, WI: tornado warnings | 9 | 1 | 89% | 5 | 40% | 16 min |
| NWS Milwaukee, WI: severe thunderstorm warnings | 87 | 54 | 38% | 187 | 73% | 23 min |
| NWS Milwaukee, WI: flash flood warnings | 13 | 8 | 38% | 24 | 79% | 74 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 10, 2:02 PM CST | Dense Fog Advisory | MKX | 34 hr |
| Jan 12, 6:16 PM CST | Winter Weather Advisory | MKX | 9 hr |
| Jan 19, 3:59 AM CST | Wind Advisory | MKX | 23 hr |
| Jan 20, 2:49 PM CST | Wind Chill Advisory | MKX | 45 hr |
| Jan 26, 3:37 AM CST | Winter Storm Watch | MKX | 11 hr |
| Jan 26, 2:18 PM CST | Winter Weather Advisory | MKX | 37 hr |
| Jan 28, 8:43 PM CST | Dense Fog Advisory | MKX | 8 hr |
| Jan 29, 3:57 AM CST | Flood Watch | MKX | 20 hr |
| Jan 29, 5:17 AM CST | Dense Fog Advisory | MKX | 6 hr |
| Jan 29, 3:00 PM CST | Winter Weather Advisory | MKX | 27 hr |
| Jan 31, 3:45 AM CST | Wind Chill Advisory | MKX | 32 hr |
| Feb 3, 3:44 AM CST | Winter Weather Advisory | MKX | 29 hr |
| Feb 6, 11:55 AM CST | Winter Storm Warning | MKX | 36 hr |
| Feb 6, 11:55 AM CST | Winter Weather Advisory | MKX | 39 hr |
| Feb 7, 5:57 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 9, 4:20 AM CST | Freezing Fog Advisory | MKX | 5 hr |
| Feb 9, 2:46 PM CST | Freezing Rain Advisory | MKX | 21 hr |
| Feb 10, 8:51 PM CST | Wind Advisory | MKX | 19 hr |
| Feb 20, 3:24 PM CST | Winter Weather Advisory | MKX | 47 hr |
| Feb 24, 9:32 PM CST | Winter Storm Watch | MKX | 14 hr |
| Feb 25, 10:17 AM CST | Winter Weather Advisory | MKX | 48 hr |
| Mar 3, 4:20 AM CST | Winter Storm Watch | MKX | 33 hr |
| Mar 4, 4:19 AM CST | Winter Storm Warning | MKX | 41 hr |
| Mar 10, 4:08 AM CDT | Dense Fog Advisory | MKX | 14 hr |
| Mar 10, 6:14 PM CDT | Dense Fog Advisory | MKX | 16 hr |
| Mar 18, 8:55 PM CDT | Winter Weather Advisory | MKX | 13 hr |
| Apr 8, 3:15 PM CDT | Flood Watch | MKX | 60 hr |
| Apr 8, 3:44 PM CDT | River Flood Watch | MKX | 130 days |
| Apr 8, 3:44 PM CDT | River Flood Watch | MKX | 130 days |
| Apr 8, 3:44 PM CDT | River Flood Watch | MKX | 130 days |
| Apr 9, 12:31 AM CDT | Dense Fog Advisory | MKX | 9 hr |
| Apr 9, 10:02 AM CDT | River Flood Warning | MKX | 24 days |
| Apr 9, 10:02 AM CDT | River Flood Warning | MKX | 27 days |
| Apr 9, 10:02 AM CDT | River Flood Warning | MKX | 36 days |
| Apr 9, 10:02 AM CDT | River Flood Warning | MKX | 21 days |
| Apr 9, 10:27 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 9, 9:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Apr 10, 10:37 AM CDT | River Flood Warning | MKX | 48 hr |
| Apr 11, 12:40 AM CDT | High Wind Warning | MKX | 3 hr |
| Apr 14, 7:07 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 16, 10:56 AM CDT | Flood Watch | MKX | 58 hr |
| Apr 17, 11:11 AM CDT | River Flood Watch | MKX | 10 hr |
| Apr 17, 9:23 PM CDT | River Flood Warning | MKX | 6 days |
| Apr 29, 9:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 10, 9:34 AM CDT | River Flood Warning | MKX | 25 hr |
| May 10, 9:34 AM CDT | River Flood Warning | MKX | 25 hr |
| May 12, 4:01 AM CDT | Frost Advisory | MKX | 27 hr |
| May 12, 4:01 AM CDT | Freeze Warning | MKX | 27 hr |
| May 14, 8:39 PM CDT | Severe Thunderstorm Warning | MKX | 36 min |
| May 19, 2:49 PM CDT | Severe Thunderstorm Warning | MKX | 56 min |
| May 19, 3:36 PM CDT | Severe Thunderstorm Warning | MKX | 39 min |
| May 19, 7:46 PM CDT | Mesoscale Discussion | SPC | 59 min |
| May 19, 8:10 PM CDT | Tornado Watch | SPC | 6 hr |
| May 19, 10:58 PM CDT | Mesoscale Discussion | SPC | 62 min |
| May 20, 1:41 AM CDT | Mesoscale Discussion | SPC | 79 min |
| May 20, 7:48 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 23, 9:04 PM CDT | Frost Advisory | MKX | 10 hr |
| May 29, 3:14 AM CDT | Dense Fog Advisory | MKX | 6 hr |
| May 29, 6:49 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| May 29, 9:00 PM CDT | Mesoscale Discussion | SPC | 60 min |
| May 30, 5:58 PM CDT | Mesoscale Discussion | SPC | 62 min |
| May 30, 6:40 PM CDT | Tornado Watch | SPC | 3 hr |
| May 30, 7:01 PM CDT | Severe Thunderstorm Warning | MKX | 44 min |
| May 30, 7:35 PM CDT | Severe Thunderstorm Warning | MKX | 40 min |
| May 30, 7:49 PM CDT | Severe Thunderstorm Warning | MKX | 41 min |
| Jun 12, 1:49 PM CDT | Tornado Watch | SPC | 9 hr |
| Jun 12, 5:56 PM CDT | Areal Flood Advisory | MKX | 3 hr |
| Jun 12, 6:02 PM CDT | Severe Thunderstorm Warning | MKX | 58 min |
| Jun 12, 6:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 12, 6:52 PM CDT | Severe Thunderstorm Warning | MKX | 53 min |
| Jun 16, 2:08 AM CDT | Areal Flood Advisory | MKX | 4 hr |
| Jun 21, 8:07 AM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 21, 11:48 PM CDT | Areal Flood Advisory | MKX | 3 hr |
| Jun 22, 9:14 PM CDT | Areal Flood Advisory | MKX | 3 hr |
| Jun 22, 9:15 PM CDT | Severe Thunderstorm Warning | MKX | 30 min |
| Jun 23, 2:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 25, 6:23 AM CDT | River Flood Warning | MKX | 7 days |
| Jun 25, 10:06 AM CDT | River Flood Warning | MKX | 4 days |
| Jun 25, 3:15 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 26, 7:06 AM CDT | Flash Flood Warning | MKX | 3 hr |
| Jun 27, 12:42 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 9, 5:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 16, 11:45 AM CDT | Heat Advisory | MKX | 3 days |
| Jul 17, 1:26 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 4:34 PM CDT | Severe Thunderstorm Warning | MKX | 41 min |
| Jul 21, 4:48 PM CDT | Areal Flood Advisory | MKX | 3 hr |
| Aug 6, 10:11 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 22, 10:02 AM CDT | Severe Thunderstorm Warning | MKX | 43 min |
| Aug 26, 3:32 PM CDT | Heat Advisory | MKX | 28 hr |
| Aug 27, 8:29 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Aug 30, 3:23 AM CDT | Heat Advisory | MKX | 15 hr |
| Aug 30, 12:24 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 30, 2:07 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 30, 3:40 PM CDT | Severe Thunderstorm Warning | MKX | 50 min |
| Aug 30, 5:14 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Sep 1, 2:51 AM CDT | Dense Fog Advisory | MKX | 6 hr |
| Sep 19, 4:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Sep 19, 4:40 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 19, 5:53 PM CDT | Severe Thunderstorm Warning | MKX | 52 min |
| Sep 19, 7:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Sep 19, 8:16 PM CDT | Severe Thunderstorm Warning | MKX | 29 min |
| Sep 25, 3:35 AM CDT | Dense Fog Advisory | MKX | 8 hr |
| Sep 26, 3:10 AM CDT | Dense Fog Advisory | MKX | 7 hr |
| Oct 3, 9:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Oct 13, 2:57 PM CDT | Frost Advisory | MKX | 17 hr |
| Oct 19, 4:30 AM CDT | Frost Advisory | MKX | 28 hr |
| Oct 20, 12:51 PM CDT | Freeze Watch | MKX | 15 hr |
| Oct 21, 4:17 AM CDT | Freeze Warning | MKX | 28 hr |
| Oct 30, 7:28 AM CDT | Dense Fog Advisory | MKX | 7 hr |
| Nov 17, 4:00 AM CST | Wind Advisory | MKX | 22 hr |
| Nov 17, 8:40 AM CST | Tornado Watch | SPC | 7 hr |
| Dec 3, 3:51 AM CST | Dense Fog Advisory | MKX | 38 hr |
| Dec 7, 1:44 PM CST | Winter Weather Advisory | MKX | 40 hr |
| Dec 11, 3:38 AM CST | Wind Chill Advisory | MKX | 26 hr |
| Dec 13, 3:46 AM CST | Lake Effect Snow Advisory | MKX | 36 hr |
| Dec 19, 3:18 AM CST | Freezing Rain Advisory | MKX | 41 hr |
| Dec 19, 3:21 PM CST | Winter Storm Watch | MKX | 23 hr |
| Dec 20, 2:45 PM CST | Winter Storm Warning | MKX | 45 hr |
| Dec 29, 3:24 AM CST | Wind Chill Advisory | MKX | 31 hr |
| Dec 30, 3:09 PM CST | Winter Weather Advisory | MKX | 69 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 archive20122014
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.