Alert archive / Wisconsin / Oconto County
Weather alerts in Oconto County, Wisconsin, 2025
122 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Oconto County and its neighbors
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 122
- Warnings
- 33
- Watches
- 9
- Advisories
- 45
- Busiest month
- June21 alerts
- Busiest day
- April 29, 20257 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 4 tornado warnings covering Oconto County in 2025 had a tornado report inside them; 2 of 3 tornado reports fell inside a warning, on average 18 minutes after it went out.
Oconto County, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 1 | 75% | 3 | 67% | 18 min |
| Severe thunderstorm warnings | 18 | 10 | 44% | 8 | 88% | 16 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 11, 2:21 AM CST | Winter Weather Advisory | GRB | 36 hr |
| 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 |
| 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 7, 3:38 AM CST | Winter Weather Advisory | GRB | 39 hr |
| Feb 8, 3:07 AM CST | Winter Storm Warning | GRB | 16 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 |
| Mar 4, 2:45 AM CST | Winter Weather Advisory | GRB | 42 hr |
| Mar 14, 11:38 AM CDT | Wind Advisory | GRB | 27 hr |
| 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 18, 2:21 PM CDT | Winter Storm Warning | GRB | 39 hr |
| Mar 18, 2:21 PM CDT | Winter Weather Advisory | GRB | 13 hr |
| Mar 19, 3:40 AM CDT | Winter Weather Advisory | GRB | 26 hr |
| Mar 19, 12:17 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 22, 3:10 AM CDT | Winter Weather Advisory | GRB | 52 hr |
| Mar 22, 2:14 PM CDT | Winter Storm Warning | GRB | 39 hr |
| Mar 28, 2:52 AM CDT | Winter Storm Watch | GRB | 24 hr |
| Mar 28, 1:51 PM CDT | Ice Storm Warning | GRB | 52 hr |
| Mar 28, 1:51 PM CDT | Winter Storm Warning | GRB | 62 hr |
| Mar 28, 6:23 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 28, 9:04 PM CDT | Winter Weather Advisory | GRB | 10 hr |
| Mar 29, 3:13 AM CDT | Winter Weather Advisory | GRB | 12 hr |
| Mar 29, 4:09 PM CDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 29, 8:32 PM CDT | Mesoscale Discussion | SPC | 5 hr |
| Mar 30, 2:18 AM CDT | River Flood Warning | GRB | 9 hr |
| Apr 1, 3:15 AM CDT | Winter Weather Advisory | GRB | 32 hr |
| Apr 28, 9:53 AM CDT | Special Weather Statement | GRB | 67 min |
| Apr 28, 7:11 PM CDT | Severe Thunderstorm Warning | GRB | 30 min |
| Apr 28, 7:18 PM CDT | Severe Thunderstorm Warning | GRB | 42 min |
| Apr 28, 7:34 PM CDT | Tornado Watch | SPC | 5 hr |
| Apr 28, 9:59 PM CDT | Severe Thunderstorm Warning | GRB | 46 min |
| Apr 28, 10:06 PM CDT | Tornado Warning | GRB | 39 min |
| Apr 28, 10:27 PM CDT | Severe Thunderstorm Warning | GRB | 63 min |
| Apr 28, 10:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| 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, 2:07 PM CDT | Severe Thunderstorm Warning | GRB | 53 min |
| May 16, 2:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 16, 2:33 PM CDT | Special Weather Statement | GRB | 27 min |
| May 16, 2:41 PM CDT | Severe Thunderstorm Warning | GRB | 49 min |
| May 16, 3:07 PM CDT | Special Weather Statement | GRB | 38 min |
| 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 24, 2:16 PM CDT | Frost Advisory | GRB | 18 hr |
| May 30, 3:16 PM CDT | Special Weather Statement | GRB | 29 min |
| May 30, 3:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 31, 12:51 PM CDT | Frost Advisory | GRB | 19 hr |
| Jun 3, 1:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 3, 4:53 PM CDT | Tornado Warning | GRB | 12 min |
| Jun 3, 5:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 3, 5:40 PM CDT | Areal Flood Advisory | GRB | 3 hr |
| Jun 8, 5:32 PM CDT | Special Weather Statement | GRB | 28 min |
| Jun 8, 5:39 PM CDT | Special Weather Statement | GRB | 36 min |
| Jun 8, 5:45 PM CDT | Severe Thunderstorm Warning | GRB | 30 min |
| Jun 8, 6:23 PM CDT | Special Weather Statement | GRB | 52 min |
| Jun 19, 4:18 PM CDT | Special Weather Statement | GRB | 27 min |
| Jun 19, 4:54 PM CDT | Special Weather Statement | GRB | 36 min |
| Jun 19, 5:39 PM CDT | Severe Thunderstorm Warning | GRB | 38 min |
| Jun 19, 6:09 PM CDT | Severe Thunderstorm Warning | GRB | 36 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 29, 1:28 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 29, 2:11 PM CDT | Severe Thunderstorm Warning | GRB | 49 min |
| Jun 29, 3:01 PM CDT | Severe Thunderstorm Warning | GRB | 44 min |
| Jun 29, 3:22 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 30, 11:40 AM CDT | Special Weather Statement | GRB | 35 min |
| Jun 30, 6:21 PM CDT | Special Weather Statement | GRB | 39 min |
| Jul 2, 3:07 PM CDT | Special Weather Statement | GRB | 38 min |
| Jul 2, 3:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 2, 3:41 PM CDT | Special Weather Statement | GRB | 34 min |
| Jul 5, 2:07 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 5, 6:17 PM CDT | Areal Flood Advisory | GRB | 3 hr |
| Jul 8, 2:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 8, 4:34 PM CDT | Severe Thunderstorm Warning | GRB | 56 min |
| Jul 8, 5:32 PM CDT | Special Weather Statement | GRB | 43 min |
| Jul 14, 1:19 PM CDT | Special Weather Statement | GRB | 41 min |
| Jul 14, 2:01 PM CDT | Special Weather Statement | GRB | 44 min |
| Jul 23, 2:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 5:02 PM CDT | Severe Thunderstorm Warning | GRB | 43 min |
| Jul 23, 5:16 PM CDT | Tornado Warning | GRB | 29 min |
| Jul 23, 5:37 PM CDT | Severe Thunderstorm Warning | GRB | 38 min |
| Jul 23, 5:41 PM CDT | Tornado Warning | GRB | 34 min |
| Aug 8, 3:11 AM CDT | Heat Advisory | GRB | 16 hr |
| Aug 9, 1:00 PM CDT | Special Weather Statement | GRB | 45 min |
| Aug 9, 2:16 PM CDT | Severe Thunderstorm Warning | GRB | 44 min |
| Aug 9, 2:56 PM CDT | Severe Thunderstorm Warning | GRB | 34 min |
| Aug 10, 12:13 AM CDT | Dense Fog Advisory | GRB | 8 hr |
| Aug 12, 4:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Sep 7, 2:48 PM CDT | Frost Advisory | GRB | 17 hr |
| 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 6, 12:31 PM CDT | Freeze Watch | GRB | 15 hr |
| Oct 7, 3:07 AM CDT | Frost Advisory | GRB | 30 hr |
| Oct 7, 3:07 AM CDT | Freeze Warning | 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 |
| 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 | 18 |
| Tornado Warning | 4 |
| Severe Thunderstorm Watch | 2 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 16 |
| Special Weather Statement | 19 |
| Flooding | |
| River Flood Warning | 1 |
| Areal Flood Advisory | 2 |
| Winter | |
| Ice Storm Warning | 1 |
| Winter Storm Warning | 7 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 18 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Extreme Cold Warning | 1 |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Cold Weather Advisory | 5 |
| Frost Advisory | 7 |
| Wind and dust | |
| Wind Advisory | 4 |
| 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.