Alert archive / Wisconsin / Washington County
Weather alerts in Washington County, Wisconsin, 2017
101 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Washington County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 101
- Warnings
- 18
- Watches
- 9
- Advisories
- 42
- Busiest month
- July15 alerts
- Busiest day
- August 10, 20178 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Washington County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 13 | 10 | 23% | 16 | 81% | 23 min |
| Flash flood warnings | 0 | 0 |
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 5, 3:09 PM CST | Wind Chill Advisory | MKX | 19 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 11, 8:48 PM CST | Winter Weather Advisory | MKX | 3 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 19, 7:00 PM CST | Dense Fog Advisory | MKX | 16 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 |
| Jan 29, 3:08 PM CST | Winter Weather Advisory | MKX | 37 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 |
| Feb 28, 10:27 AM CST | Severe Thunderstorm Warning | MKX | 63 min |
| Feb 28, 1:37 PM CST | Winter Weather Advisory | MKX | 28 hr |
| Feb 28, 2:15 PM CST | Dense Fog Advisory | MKX | 9 hr |
| Mar 6, 2:53 PM CST | Wind Advisory | MKX | 42 hr |
| Mar 6, 10:35 PM CST | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 7, 12:19 AM CST | Special Weather Statement | MKX | 71 min |
| Mar 7, 12:30 AM CST | Severe Thunderstorm Warning | MKX | 45 min |
| Mar 7, 6:19 PM CST | Special Weather Statement | MKX | 41 min |
| Mar 7, 6:59 PM CST | Special Weather Statement | MKX | 46 min |
| Mar 8, 9:08 AM CST | High Wind Warning | MKX | 8 hr |
| Mar 11, 2:45 PM CST | Winter Weather Advisory | MKX | 56 hr |
| Mar 13, 9:43 AM CDT | Lake Effect Snow Warning | MKX | 27 hr |
| Mar 16, 9:38 PM CDT | Winter Weather Advisory | MKX | 11 hr |
| Mar 23, 6:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Mar 28, 6:49 PM CDT | Dense Fog Advisory | MKX | 14 hr |
| Apr 10, 1:48 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 15, 10:37 PM CDT | Special Weather Statement | MKX | 38 min |
| Apr 20, 1:31 AM CDT | Special Weather Statement | MKX | 44 min |
| May 1, 4:48 AM CDT | Dense Fog Advisory | MKX | 4 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 | Freeze Warning | MKX | 28 hr |
| May 15, 5:08 PM CDT | Special Weather Statement | MKX | 37 min |
| May 15, 10:49 PM CDT | Severe Thunderstorm Warning | MKX | 26 min |
| May 17, 3:13 PM CDT | Tornado Watch | SPC | 9 hr |
| May 17, 7:11 PM CDT | Severe Thunderstorm Warning | MKX | 34 min |
| May 17, 9:22 PM CDT | Severe Thunderstorm Warning | MKX | 38 min |
| May 21, 12:53 AM CDT | Dense Fog Advisory | MKX | 6 hr |
| Jun 3, 7:07 AM CDT | Special Weather Statement | MKX | 23 min |
| Jun 3, 7:41 AM CDT | Special Weather Statement | MKX | 34 min |
| Jun 12, 4:37 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 12, 6:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 12, 6:52 PM CDT | Severe Thunderstorm Warning | MKX | 53 min |
| Jun 12, 7:38 PM CDT | Severe Thunderstorm Warning | MKX | 37 min |
| 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, 4:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 16, 11:52 PM CDT | Special Weather Statement | MKX | 23 min |
| Jun 19, 1:29 PM CDT | Special Weather Statement | MKX | 31 min |
| Jun 19, 2:06 PM CDT | Special Weather Statement | MKX | 24 min |
| Jun 28, 5:14 PM CDT | Tornado Watch | SPC | 4 hr |
| Jun 28, 6:45 PM CDT | Severe Thunderstorm Warning | MKX | 30 min |
| Jul 1, 1:40 PM CDT | Special Weather Statement | MKX | 35 min |
| Jul 6, 9:43 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 6, 11:13 PM CDT | Severe Thunderstorm Warning | MKX | 32 min |
| Jul 6, 11:27 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jul 7, 5:50 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jul 11, 12:19 PM CDT | Flash Flood Watch | MKX | 22 hr |
| Jul 15, 5:53 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 15, 7:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 15, 10:03 PM CDT | Severe Thunderstorm Warning | MKX | 57 min |
| Jul 15, 11:20 PM CDT | Severe Thunderstorm Warning | MKX | 40 min |
| Jul 19, 8:29 PM CDT | Special Weather Statement | MKX | 31 min |
| Jul 19, 10:09 PM CDT | Special Weather Statement | MKX | 81 min |
| Jul 19, 10:28 PM CDT | High Wind Warning | MKX | 2 hr |
| Jul 26, 5:16 PM CDT | Areal Flood Advisory | MKX | 3 hr |
| Jul 27, 2:58 AM CDT | Dense Fog Advisory | MKX | 4 hr |
| Aug 3, 9:57 AM CDT | Special Weather Statement | MKX | 33 min |
| Aug 3, 12:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 3:22 PM CDT | Special Weather Statement | MKX | 23 min |
| Aug 3, 5:18 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 2:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 10, 3:08 PM CDT | Special Weather Statement | MKX | 22 min |
| Aug 10, 3:26 PM CDT | Severe Thunderstorm Warning | MKX | 49 min |
| Aug 10, 3:37 PM CDT | Special Weather Statement | MKX | 23 min |
| Aug 10, 4:10 PM CDT | Severe Thunderstorm Warning | MKX | 35 min |
| Aug 10, 4:38 PM CDT | Special Weather Statement | MKX | 37 min |
| Aug 10, 5:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Aug 10, 5:51 PM CDT | Areal Flood Advisory | MKX | 54 min |
| Aug 30, 4:58 PM CDT | Special Weather Statement | MKX | 47 min |
| Sep 2, 9:55 PM CDT | Dense Fog Advisory | MKX | 11 hr |
| Sep 14, 2:22 AM CDT | Dense Fog Advisory | MKX | 8 hr |
| Sep 19, 8:51 PM CDT | Dense Fog Advisory | MKX | 12 hr |
| Sep 22, 3:22 AM CDT | Dense Fog Advisory | MKX | 6 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 4, 8:19 PM CDT | Dense Fog Advisory | MKX | 11 hr |
| Nov 12, 9:27 PM CST | Dense Fog Advisory | MKX | 13 hr |
| Nov 14, 3:40 AM CST | Dense Fog Advisory | MKX | 5 hr |
| Dec 4, 3:02 AM CST | Wind Advisory | MKX | 39 hr |
| Dec 11, 8:37 AM CST | Winter Weather Advisory | MKX | 7 hr |
| Dec 12, 1:41 PM CST | Winter Weather Advisory | MKX | 31 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 | 13 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 12 |
| Special Weather Statement | 20 |
| Flooding | |
| Flash Flood Watch | 1 |
| Areal Flood Advisory | 2 |
| Winter | |
| Lake Effect Snow Warning | 1 |
| Winter Weather Advisory | 12 |
| Cold | |
| Freeze Warning | 2 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 2 |
| Wind Advisory | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 18 |
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.