Alert archive / Wisconsin / Manitowoc County
Weather alerts in Manitowoc County, Wisconsin, 2020
112 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Manitowoc County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 112
- Warnings
- 14
- Watches
- 8
- Advisories
- 47
- Busiest month
- July19 alerts
- Busiest day
- August 10, 20206 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Manitowoc County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 6 | 5 | 17% | 7 | 57% | 9 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Green Bay, WI: tornado warnings | 1 | 0 | 100% | 3 | 0% | |
| NWS Green Bay, WI: severe thunderstorm warnings | 80 | 38 | 53% | 110 | 72% | 23 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 8, 3:04 PM CST | Winter Weather Advisory | GRB | 30 hr |
| Jan 8, 3:18 PM CST | Lakeshore Flood Advisory | GRB | 30 hr |
| Jan 9, 3:20 PM CST | Winter Storm Watch | GRB | 24 hr |
| Jan 10, 3:16 PM CST | Winter Storm Warning | GRB | 31 hr |
| Jan 10, 3:16 PM CST | Winter Weather Advisory | GRB | 15 hr |
| Jan 10, 3:26 PM CST | Lakeshore Flood Advisory | GRB | 29 hr |
| Jan 16, 2:28 PM CST | Winter Weather Advisory | GRB | 67 hr |
| Jan 16, 2:33 PM CST | Lakeshore Flood Advisory | GRB | 45 hr |
| Feb 8, 3:14 AM CST | Winter Weather Advisory | GRB | 40 hr |
| Feb 8, 2:34 PM CST | Winter Storm Warning | GRB | 28 hr |
| Feb 9, 10:56 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 12, 2:58 PM CST | Winter Weather Advisory | GRB | 15 hr |
| Feb 13, 2:30 PM CST | Wind Chill Advisory | GRB | 20 hr |
| Feb 16, 2:58 PM CST | Winter Weather Advisory | GRB | 41 hr |
| Mar 5, 2:00 PM CST | Wind Advisory | GRB | 16 hr |
| Mar 19, 11:54 PM CDT | River Flood Warning | GRB | 12 hr |
| Apr 7, 3:06 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Apr 8, 12:46 AM CDT | Dense Fog Advisory | GRB | 9 hr |
| Apr 11, 2:49 PM CDT | Lakeshore Flood Advisory | GRB | 52 hr |
| Apr 12, 3:50 AM CDT | Wind Advisory | GRB | 39 hr |
| Apr 20, 7:37 PM CDT | Severe Thunderstorm Warning | GRB | 56 min |
| Apr 28, 12:52 AM CDT | Dense Fog Advisory | GRB | 10 hr |
| May 7, 9:15 AM CDT | Freeze Warning | GRB | 24 hr |
| May 7, 9:36 AM CDT | Freeze Watch | GRB | 18 hr |
| May 8, 3:31 AM CDT | Freeze Warning | GRB | 28 hr |
| May 10, 2:50 PM CDT | Freeze Warning | GRB | 17 hr |
| May 11, 2:52 PM CDT | Freeze Warning | GRB | 17 hr |
| May 12, 2:36 PM CDT | Frost Advisory | GRB | 17 hr |
| May 15, 4:02 AM CDT | Dense Fog Advisory | GRB | 5 hr |
| May 16, 3:08 PM CDT | Lakeshore Flood Advisory | GRB | 64 hr |
| May 17, 2:21 AM CDT | Flood Watch | GRB | 30 hr |
| May 17, 3:55 PM CDT | Areal Flood Advisory | GRB | 13 hr |
| May 17, 8:00 PM CDT | Wind Advisory | GRB | 8 hr |
| May 23, 2:46 AM CDT | Dense Fog Advisory | GRB | 6 hr |
| May 27, 1:42 PM CDT | Special Weather Statement | GRB | 33 min |
| May 28, 12:53 PM CDT | Areal Flood Advisory | GRB | 4 hr |
| Jun 1, 3:37 AM CDT | Beach Hazards Statement | GRB | 19 hr |
| Jun 1, 2:49 PM CDT | Special Weather Statement | GRB | 41 min |
| Jun 2, 5:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 2, 5:48 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 2, 8:37 PM CDT | Severe Thunderstorm Warning | GRB | 68 min |
| Jun 9, 3:48 AM CDT | Beach Hazards Statement | GRB | 32 hr |
| Jun 9, 3:37 PM CDT | Wind Advisory | GRB | 14 hr |
| Jun 10, 2:10 PM CDT | Special Weather Statement | GRB | 35 min |
| Jun 10, 2:44 PM CDT | Special Weather Statement | GRB | 46 min |
| Jun 10, 4:49 PM CDT | Areal Flood Advisory | GRB | 5 hr |
| Jun 10, 5:34 PM CDT | Areal Flood Advisory | GRB | 4 hr |
| Jun 11, 3:04 PM CDT | Severe Thunderstorm Warning | GRB | 41 min |
| Jun 11, 3:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 20, 2:12 PM CDT | Special Weather Statement | GRB | 33 min |
| Jun 20, 7:28 PM CDT | Special Weather Statement | GRB | 47 min |
| Jun 29, 11:44 AM CDT | Special Weather Statement | GRB | 91 min |
| Jul 6, 2:52 PM CDT | Special Weather Statement | GRB | 38 min |
| Jul 6, 3:08 PM CDT | Severe Thunderstorm Warning | GRB | 20 min |
| Jul 6, 10:23 PM CDT | Special Weather Statement | GRB | 37 min |
| Jul 6, 10:45 PM CDT | Special Weather Statement | GRB | 30 min |
| Jul 7, 3:29 PM CDT | Special Weather Statement | GRB | 46 min |
| Jul 9, 12:11 PM CDT | Flood Watch | GRB | 16 hr |
| Jul 10, 3:34 AM CDT | Areal Flood Advisory | GRB | 3 hr |
| Jul 10, 4:20 AM CDT | Flood Watch | GRB | 3 hr |
| Jul 10, 6:07 AM CDT | Areal Flood Advisory | GRB | 114 min |
| Jul 14, 3:33 AM CDT | Beach Hazards Statement | GRB | 20 hr |
| Jul 17, 2:30 PM CDT | Heat Advisory | GRB | 30 hr |
| Jul 17, 4:42 PM CDT | Beach Hazards Statement | GRB | 29 hr |
| Jul 19, 4:00 AM CDT | Special Weather Statement | GRB | 60 min |
| Jul 19, 4:40 AM CDT | Severe Thunderstorm Warning | GRB | 35 min |
| Jul 26, 1:28 PM CDT | Special Weather Statement | GRB | 77 min |
| Jul 26, 3:34 PM CDT | Areal Flood Advisory | GRB | 2 hr |
| Jul 26, 5:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 28, 5:44 PM CDT | Special Weather Statement | GRB | 61 min |
| Jul 28, 6:12 PM CDT | Severe Thunderstorm Warning | GRB | 44 min |
| Aug 2, 3:09 PM CDT | Beach Hazards Statement | GRB | 30 hr |
| Aug 2, 3:09 PM CDT | Lakeshore Flood Advisory | GRB | 30 hr |
| Aug 7, 3:23 PM CDT | Beach Hazards Statement | GRB | 37 hr |
| Aug 9, 6:27 AM CDT | Special Weather Statement | GRB | 48 min |
| Aug 9, 6:55 AM CDT | Areal Flood Advisory | GRB | 2 hr |
| Aug 10, 12:44 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Aug 10, 12:58 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 10, 2:20 PM CDT | Special Weather Statement | GRB | 40 min |
| Aug 10, 2:33 PM CDT | Special Weather Statement | GRB | 42 min |
| Aug 10, 2:44 PM CDT | Areal Flood Advisory | GRB | 3 hr |
| Aug 10, 3:13 PM CDT | Special Weather Statement | GRB | 47 min |
| Aug 22, 5:46 PM CDT | Special Weather Statement | GRB | 44 min |
| Aug 27, 10:56 AM CDT | Special Weather Statement | GRB | 49 min |
| Aug 27, 7:30 PM CDT | Flash Flood Watch | GRB | 17 hr |
| Aug 30, 3:30 PM CDT | Beach Hazards Statement | GRB | 30 hr |
| Sep 5, 2:53 PM CDT | Beach Hazards Statement | GRB | 37 hr |
| Sep 5, 2:53 PM CDT | Lakeshore Flood Advisory | GRB | 30 hr |
| Sep 6, 6:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Sep 7, 3:08 PM CDT | Beach Hazards Statement | GRB | 48 hr |
| Sep 11, 3:10 PM CDT | Beach Hazards Statement | GRB | 29 hr |
| Sep 14, 3:32 PM CDT | Beach Hazards Statement | GRB | 32 hr |
| Sep 18, 1:43 PM CDT | Frost Advisory | GRB | 18 hr |
| Sep 19, 2:39 PM CDT | Beach Hazards Statement | GRB | 52 hr |
| Sep 24, 9:05 PM CDT | Beach Hazards Statement | GRB | 29 hr |
| Sep 26, 11:12 AM CDT | Beach Hazards Statement | GRB | 23 hr |
| Oct 1, 3:33 AM CDT | Frost Advisory | GRB | 29 hr |
| Oct 2, 2:22 PM CDT | Frost Advisory | GRB | 18 hr |
| Oct 4, 2:36 PM CDT | Frost Advisory | GRB | 17 hr |
| Oct 11, 3:34 AM CDT | Lakeshore Flood Advisory | GRB | 35 hr |
| Oct 15, 3:03 AM CDT | Freeze Warning | GRB | 29 hr |
| Oct 16, 2:18 PM CDT | Lakeshore Flood Advisory | GRB | 32 hr |
| Oct 17, 2:58 AM CDT | Wind Advisory | GRB | 16 hr |
| Oct 22, 9:16 PM CDT | Areal Flood Advisory | GRB | 9 hr |
| Oct 31, 9:00 PM CDT | Wind Advisory | GRB | 22 hr |
| Nov 10, 3:50 AM CST | Wind Advisory | GRB | 26 hr |
| Nov 10, 1:56 PM CST | Special Weather Statement | GRB | 49 min |
| Nov 10, 3:39 PM CST | Special Weather Statement | GRB | 66 min |
| Nov 14, 4:11 AM CST | Lakeshore Flood Advisory | GRB | 26 hr |
| Nov 14, 2:30 PM CST | Wind Advisory | GRB | 31 hr |
| Dec 11, 3:58 AM CST | Winter Weather Advisory | GRB | 35 hr |
| Dec 28, 2:03 PM CST | Winter Weather Advisory | GRB | 43 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 | 6 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 7 |
| Special Weather Statement | 22 |
| Flooding | |
| River Flood Warning | 1 |
| Flash Flood Watch | 1 |
| Flood Watch | 3 |
| Areal Flood Advisory | 10 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 8 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 5 |
| Freeze Watch | 1 |
| Frost Advisory | 5 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 8 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
| Coast and beach | |
| Lakeshore Flood Advisory | 10 |
| Beach Hazards Statement | 14 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.