Alert archive / Wisconsin / Brown County
Weather alerts in Brown County, Wisconsin, 2025
108 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Brown County and its neighbors
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 108
- Warnings
- 23
- Watches
- 10
- Advisories
- 47
- Busiest month
- June17 alerts
- Busiest day
- August 9, 20259 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Brown County in 2025 had a tornado report inside them.
Brown County, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 16 | 11 | 31% | 21 | 81% | 20 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Green Bay, WI: tornado warnings | 18 | 2 | 89% | 11 | 36% | 15 min |
| NWS Green Bay, WI: severe thunderstorm warnings | 104 | 55 | 47% | 177 | 77% | 19 min |
| NWS Green Bay, WI: flash flood warnings | 6 | 4 | 33% | 12 | 92% | 61 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 17, 2:21 PM CST | Cold Weather Advisory | GRB | 3 days |
| Jan 19, 2:14 PM CST | Extreme Cold Warning | GRB | 46 hr |
| Jan 21, 3:16 AM CST | Cold Weather Advisory | GRB | 21 hr |
| Jan 28, 3:05 AM CST | Wind Advisory | GRB | 15 hr |
| Feb 2, 2:14 AM CST | Winter Weather Advisory | GRB | 7 hr |
| Feb 2, 3:12 AM CST | Winter Weather Advisory | GRB | 33 hr |
| Feb 5, 2:37 PM CST | Wind Advisory | GRB | 29 hr |
| Feb 5, 10:29 PM CST | Winter Weather Advisory | GRB | 8 hr |
| Feb 6, 3:56 AM CST | Winter Storm Watch | GRB | 32 hr |
| Feb 7, 3:38 AM CST | Winter Weather Advisory | GRB | 39 hr |
| Feb 8, 3:07 AM CST | Winter Storm Warning | GRB | 16 hr |
| Feb 11, 1:08 PM CST | Winter Weather Advisory | GRB | 38 hr |
| Feb 13, 1:30 PM CST | Winter Weather Advisory | GRB | 61 hr |
| Feb 16, 2:59 AM CST | Cold Weather Advisory | GRB | 33 hr |
| Feb 17, 1:34 PM CST | Cold Weather Advisory | GRB | 20 hr |
| Feb 18, 1:22 PM CST | Cold Weather Advisory | GRB | 20 hr |
| Feb 27, 12:55 PM CST | Wind Advisory | GRB | 35 hr |
| Mar 4, 2:45 AM CST | Winter Weather Advisory | GRB | 42 hr |
| Mar 14, 9:29 AM CDT | Special Weather Statement | GRB | 31 min |
| Mar 14, 11:38 AM CDT | Wind Advisory | GRB | 27 hr |
| Mar 15, 12:27 AM CDT | Special Weather Statement | GRB | 63 min |
| Mar 15, 1:47 AM CDT | Special Weather Statement | GRB | 58 min |
| Mar 15, 2:48 AM CDT | Special Weather Statement | GRB | 27 min |
| Mar 19, 3:40 AM CDT | Winter Weather Advisory | GRB | 26 hr |
| Mar 22, 3:10 AM CDT | Winter Weather Advisory | GRB | 52 hr |
| Mar 28, 6:23 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 29, 2:47 PM CDT | Winter Weather Advisory | GRB | 21 hr |
| May 8, 1:04 PM CDT | Frost Advisory | GRB | 19 hr |
| May 13, 7:36 PM CDT | Dense Fog Advisory | GRB | 16 hr |
| May 14, 8:14 PM CDT | Dense Fog Advisory | GRB | 15 hr |
| May 15, 3:05 PM CDT | Tornado Watch | SPC | 6 hr |
| May 16, 2:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 16, 5:27 PM CDT | Severe Thunderstorm Warning | GRB | 48 min |
| May 16, 6:01 PM CDT | Severe Thunderstorm Warning | GRB | 44 min |
| May 30, 3:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 30, 4:43 PM CDT | Severe Thunderstorm Warning | GRB | 47 min |
| May 30, 5:16 PM CDT | Severe Thunderstorm Warning | GRB | 29 min |
| Jun 3, 1:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 3, 5:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 19, 1:22 PM CDT | Special Weather Statement | GRB | 23 min |
| Jun 19, 1:49 PM CDT | Special Weather Statement | GRB | 41 min |
| Jun 19, 6:09 PM CDT | Severe Thunderstorm Warning | GRB | 36 min |
| Jun 19, 7:11 PM CDT | Special Weather Statement | GRB | 34 min |
| Jun 19, 7:30 PM CDT | Severe Thunderstorm Warning | GRB | 34 min |
| Jun 20, 2:56 AM CDT | Heat Advisory | GRB | 4 days |
| Jun 23, 12:29 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 23, 1:15 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 23, 3:25 PM CDT | Severe Thunderstorm Warning | GRB | 35 min |
| Jun 29, 12:57 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 29, 1:28 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 29, 3:01 PM CDT | Severe Thunderstorm Warning | GRB | 44 min |
| Jun 29, 3:22 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 29, 3:27 PM CDT | Areal Flood Advisory | GRB | 3 hr |
| Jun 29, 3:36 PM CDT | Severe Thunderstorm Warning | GRB | 38 min |
| Jul 2, 3:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 2, 4:25 PM CDT | Special Weather Statement | GRB | 50 min |
| Jul 5, 6:17 PM CDT | Areal Flood Advisory | GRB | 3 hr |
| Jul 5, 7:09 PM CDT | Areal Flood Advisory | GRB | 2 hr |
| Jul 8, 2:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 16, 2:50 AM CDT | Flood Watch | GRB | 19 hr |
| Jul 16, 12:17 PM CDT | Tornado Watch | SPC | 7 hr |
| Jul 16, 5:19 PM CDT | Areal Flood Advisory | GRB | 4 hr |
| Jul 19, 6:53 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Jul 22, 11:44 AM CDT | Heat Advisory | GRB | 32 hr |
| Jul 23, 5:59 PM CDT | Severe Thunderstorm Warning | GRB | 46 min |
| Jul 23, 6:37 PM CDT | Severe Thunderstorm Warning | GRB | 38 min |
| Jul 27, 1:15 PM CDT | Heat Advisory | GRB | 25 hr |
| Aug 8, 3:11 AM CDT | Heat Advisory | GRB | 16 hr |
| Aug 9, 9:28 AM CDT | Flood Watch | GRB | 7 hr |
| Aug 9, 10:03 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Aug 9, 12:18 PM CDT | Special Weather Statement | GRB | 42 min |
| Aug 9, 2:06 PM CDT | Severe Thunderstorm Warning | GRB | 39 min |
| Aug 9, 2:16 PM CDT | Severe Thunderstorm Warning | GRB | 44 min |
| Aug 9, 2:32 PM CDT | Severe Thunderstorm Warning | GRB | 43 min |
| Aug 9, 2:40 PM CDT | Severe Thunderstorm Warning | GRB | 50 min |
| Aug 9, 2:42 PM CDT | Tornado Warning | GRB | 10 min |
| Aug 9, 2:56 PM CDT | Severe Thunderstorm Warning | GRB | 34 min |
| Aug 12, 4:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Aug 12, 5:13 PM CDT | Special Weather Statement | GRB | 47 min |
| Aug 12, 5:55 PM CDT | Special Weather Statement | GRB | 50 min |
| Aug 16, 11:15 AM CDT | Special Weather Statement | GRB | 30 min |
| Aug 16, 3:35 PM CDT | Special Weather Statement | GRB | 55 min |
| Aug 24, 1:16 PM CDT | Special Weather Statement | GRB | 29 min |
| Sep 11, 10:50 PM CDT | Dense Fog Advisory | GRB | 12 hr |
| Sep 14, 3:23 AM CDT | Dense Fog Advisory | GRB | 6 hr |
| Sep 21, 11:01 PM CDT | Dense Fog Advisory | GRB | 11 hr |
| Sep 22, 8:36 PM CDT | Dense Fog Advisory | GRB | 10 hr |
| Oct 3, 9:38 PM CDT | Special Weather Statement | GRB | 67 min |
| Oct 7, 3:07 AM CDT | Frost Advisory | GRB | 30 hr |
| Oct 8, 2:48 PM CDT | Frost Advisory | GRB | 18 hr |
| Oct 19, 2:14 PM CDT | Frost Advisory | GRB | 18 hr |
| Oct 23, 2:24 AM CDT | Freeze Warning | GRB | 31 hr |
| Nov 18, 8:17 PM CST | Dense Fog Advisory | GRB | 13 hr |
| Nov 25, 3:07 AM CST | Winter Weather Advisory | GRB | 39 hr |
| Nov 25, 10:58 AM CST | Wind Advisory | GRB | 43 hr |
| Nov 27, 2:16 PM CST | Winter Storm Watch | GRB | 23 hr |
| Nov 28, 3:25 AM CST | Winter Storm Warning | GRB | 51 hr |
| Nov 28, 1:08 PM CST | Winter Weather Advisory | GRB | 47 hr |
| Dec 8, 2:50 AM CST | Winter Storm Watch | GRB | 24 hr |
| Dec 9, 2:37 AM CST | Winter Storm Warning | GRB | 29 hr |
| Dec 9, 2:37 AM CST | Winter Weather Advisory | GRB | 27 hr |
| Dec 12, 1:47 AM CST | Cold Weather Advisory | GRB | 56 hr |
| Dec 18, 2:14 PM CST | Winter Weather Advisory | GRB | 16 hr |
| Dec 20, 3:14 PM CST | Wind Advisory | GRB | 4 hr |
| Dec 25, 3:07 AM CST | Winter Weather Advisory | GRB | 31 hr |
| Dec 26, 2:13 PM CST | Winter Storm Watch | GRB | 24 hr |
| Dec 27, 2:14 PM CST | Winter Storm Warning | GRB | 49 hr |
| Dec 29, 8:18 AM CST | Winter Weather Advisory | GRB | 7 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 | 16 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 2 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 13 |
| Special Weather Statement | 15 |
| Flooding | |
| Flood Watch | 2 |
| Areal Flood Advisory | 4 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 16 |
| Heat | |
| Heat Advisory | 4 |
| Cold | |
| Extreme Cold Warning | 1 |
| Freeze Warning | 1 |
| Cold Weather Advisory | 6 |
| Frost Advisory | 4 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20242026
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.