Alert archive / Wisconsin / Florence County
Weather alerts in Florence County, Wisconsin, 2020
68 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Florence County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 68
- Warnings
- 9
- Watches
- 3
- Advisories
- 22
- Busiest month
- May15 alerts
- Busiest day
- May 26, 20208 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Florence County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 1 | 86% | 0 | ||
| 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 16, 2:28 PM CST | Winter Weather Advisory | GRB | 67 hr |
| Feb 8, 3:14 AM CST | Winter Weather Advisory | GRB | 40 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 |
| Apr 10, 3:26 PM CDT | Winter Storm Watch | GRB | 23 hr |
| Apr 11, 2:40 PM CDT | Winter Storm Warning | GRB | 46 hr |
| Apr 28, 12:52 AM CDT | Dense Fog Advisory | GRB | 10 hr |
| May 1, 8:05 AM CDT | Areal Flood Advisory | GRB | 72 hr |
| May 15, 4:02 AM CDT | Dense Fog Advisory | GRB | 5 hr |
| May 25, 10:59 AM CDT | Mesoscale Discussion | SPC | 61 min |
| May 25, 7:25 PM CDT | Severe Thunderstorm Warning | GRB | 27 min |
| May 26, 12:32 PM CDT | Special Weather Statement | GRB | 58 min |
| May 26, 1:27 PM CDT | Special Weather Statement | GRB | 63 min |
| May 26, 2:02 PM CDT | Special Weather Statement | GRB | 58 min |
| May 26, 2:56 PM CDT | Special Weather Statement | GRB | 94 min |
| May 26, 4:29 PM CDT | Special Weather Statement | GRB | 91 min |
| May 26, 5:36 PM CDT | Special Weather Statement | GRB | 54 min |
| May 26, 6:19 PM CDT | Special Weather Statement | GRB | 86 min |
| May 27, 3:22 PM CDT | Special Weather Statement | GRB | 23 min |
| May 27, 3:44 PM CDT | Special Weather Statement | GRB | 61 min |
| May 27, 6:10 PM CDT | Special Weather Statement | GRB | 50 min |
| May 30, 1:44 PM CDT | Frost Advisory | GRB | 18 hr |
| Jun 12, 3:01 AM CDT | Frost Advisory | GRB | 27 hr |
| Jun 20, 10:41 AM CDT | Areal Flood Advisory | GRB | 5 hr |
| Jun 26, 4:01 PM CDT | Special Weather Statement | GRB | 44 min |
| Jun 29, 10:14 AM CDT | Special Weather Statement | GRB | 91 min |
| Jul 8, 9:35 PM CDT | Special Weather Statement | MQT | 40 min |
| Jul 9, 12:47 AM CDT | Special Weather Statement | GRB | 58 min |
| Jul 9, 1:03 AM CDT | Severe Thunderstorm Warning | GRB | 42 min |
| Jul 18, 4:02 AM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 18, 8:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 18, 9:44 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 19, 1:13 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 19, 1:24 AM CDT | Severe Thunderstorm Warning | GRB | 36 min |
| Jul 19, 1:40 AM CDT | Severe Thunderstorm Warning | GRB | 80 min |
| Aug 8, 5:18 AM CDT | Special Weather Statement | GRB | 57 min |
| Aug 9, 7:01 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 10, 10:56 AM CDT | Special Weather Statement | GRB | 49 min |
| Aug 10, 12:44 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Aug 10, 12:52 PM CDT | Special Weather Statement | GRB | 38 min |
| Aug 21, 5:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Aug 21, 7:39 PM CDT | Severe Thunderstorm Warning | GRB | 51 min |
| Aug 21, 8:29 PM CDT | Special Weather Statement | GRB | 46 min |
| Aug 22, 3:30 PM CDT | Special Weather Statement | GRB | 60 min |
| Aug 24, 1:13 AM CDT | Dense Fog Advisory | GRB | 7 hr |
| Aug 25, 11:40 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 26, 8:48 PM CDT | Special Weather Statement | GRB | 42 min |
| Aug 26, 9:16 PM CDT | Special Weather Statement | GRB | 29 min |
| Sep 9, 3:30 AM CDT | Frost Advisory | GRB | 29 hr |
| Sep 10, 2:29 PM CDT | Frost Advisory | GRB | 18 hr |
| Sep 13, 2:34 PM CDT | Frost Advisory | GRB | 17 hr |
| Sep 16, 3:55 AM CDT | Frost Advisory | GRB | 28 hr |
| Sep 17, 11:38 AM CDT | Freeze Warning | GRB | 21 hr |
| Sep 23, 7:58 PM CDT | Special Weather Statement | GRB | 62 min |
| Sep 23, 9:00 PM CDT | Special Weather Statement | GRB | 60 min |
| Sep 23, 11:34 PM CDT | Areal Flood Advisory | GRB | 5 hr |
| Sep 25, 10:44 PM CDT | Severe Thunderstorm Warning | GRB | 28 min |
| Sep 26, 3:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Sep 26, 5:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Sep 26, 5:50 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Sep 26, 7:12 PM CDT | Severe Thunderstorm Warning | GRB | 33 min |
| Oct 19, 2:49 PM CDT | Winter Weather Advisory | GRB | 34 hr |
| Oct 20, 7:06 PM CDT | Mesoscale Discussion | SPC | 4 hr |
| Oct 22, 5:00 AM CDT | Winter Weather Advisory | GRB | 23 hr |
| Oct 31, 9:00 PM CDT | Wind Advisory | GRB | 22 hr |
| Nov 14, 2:30 PM CST | Wind Advisory | GRB | 31 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 | 7 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 11 |
| Special Weather Statement | 23 |
| Flooding | |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 7 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 6 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
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.