Alert archive / Wisconsin / Brown County

Weather alerts in Brown County, Wisconsin, 2026

148 weather alerts in 2026, 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 2026. Tap one for its archive.

Alerts: 148
Warnings: 39
Watches: 18
Advisories: 42
Busiest month: April35 alerts
Busiest day: April 14, 202617 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

Brown County, 2026

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	19	10	47%	32	78%	23 min
Flash flood warnings	6	5	17%	18	78%	31 min

Each office's whole area, 2026

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Green Bay, WI: tornado warnings	26	4	85%	10	60%	23 min
NWS Green Bay, WI: severe thunderstorm warnings	149	62	58%	186	80%	25 min
NWS Green Bay, WI: flash flood warnings	12	8	33%	31	74%	50 min

An office's figures cover every county it serves, including across state lines.

The year is still running; reports filed late and damage surveys can still change these figures.

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 4, 3:34 AM CST	Winter Weather Advisory	GRB	21 hr
Jan 5, 3:17 AM CST	Winter Weather Advisory	GRB	43 hr
Jan 8, 2:01 AM CST	Dense Fog Advisory	GRB	10 hr
Jan 8, 10:39 AM CST	Flood Watch	GRB	21 hr
Jan 10, 2:30 AM CST	Winter Weather Advisory	GRB	20 hr
Jan 16, 1:38 AM CST	Winter Weather Advisory	GRB	34 hr
Jan 17, 2:00 PM CST	Cold Weather Advisory	GRB	68 hr
Jan 18, 2:05 AM CST	Winter Weather Advisory	GRB	34 hr
Jan 20, 1:36 PM CST	Extreme Cold Watch	GRB	48 hr
Jan 21, 1:31 PM CST	Extreme Cold Warning	GRB	67 hr
Jan 24, 1:18 PM CST	Cold Weather Advisory	GRB	23 hr
Jan 25, 2:33 AM CST	Cold Weather Advisory	GRB	33 hr
Feb 18, 4:38 AM CST	Special Weather Statement	GRB	52 min
Mar 5, 9:39 PM CST	Dense Fog Advisory	GRB	29 hr
Mar 10, 2:13 AM CDT	Winter Weather Advisory	GRB	35 hr
Mar 12, 1:39 AM CDT	Wind Advisory	GRB	40 hr
Mar 12, 2:38 PM CDT	Winter Storm Watch	GRB	22 hr
Mar 13, 12:59 PM CDT	Winter Storm Warning	GRB	49 hr
Mar 14, 1:13 PM CDT	Blizzard Warning	GRB	56 hr
Mar 14, 11:55 PM CDT	Mesoscale Discussion	SPC	5 hr
Mar 16, 4:25 AM CDT	Mesoscale Discussion	SPC	5 hr
Mar 16, 11:37 AM CDT	Winter Weather Advisory	GRB	9 hr
Mar 30, 11:26 PM CDT	Severe Thunderstorm Warning	GRB	49 min
Mar 30, 11:41 PM CDT	Severe Thunderstorm Warning	GRB	49 min
Mar 31, 10:57 AM CDT	Special Weather Statement	GRB	63 min
Apr 1, 3:16 AM CDT	Winter Weather Advisory	GRB	31 hr
Apr 2, 7:27 AM CDT	Mesoscale Discussion	SPC	3 hr
Apr 2, 9:57 AM CDT	Winter Weather Advisory	GRB	3 hr
Apr 2, 8:10 PM CDT	Special Weather Statement	GRB	50 min
Apr 4, 11:40 AM CDT	River Flood Warning	GRB	9 hr
Apr 12, 5:24 PM CDT	Special Weather Statement	GRB	36 min
Apr 13, 2:04 AM CDT	Flood Watch	GRB	49 hr
Apr 13, 6:37 PM CDT	Special Weather Statement	GRB	38 min
Apr 13, 7:30 PM CDT	Special Weather Statement	GRB	30 min
Apr 13, 7:39 PM CDT	Severe Thunderstorm Warning	GRB	51 min
Apr 13, 8:22 PM CDT	Severe Thunderstorm Warning	GRB	42 min
Apr 13, 8:36 PM CDT	Areal Flood Advisory	GRB	3 hr
Apr 13, 9:26 PM CDT	Special Weather Statement	GRB	34 min
Apr 13, 9:42 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 13, 10:01 PM CDT	Flash Flood Warning	GRB	6 hr
Apr 13, 10:21 PM CDT	Areal Flood Advisory	GRB	6 hr
Apr 13, 10:35 PM CDT	Special Weather Statement	GRB	55 min
Apr 13, 10:54 PM CDT	Flash Flood Warning	GRB	5 hr
Apr 14, 2:40 AM CDT	River Flood Warning	GRB	21 days
Apr 14, 3:52 AM CDT	Areal Flood Advisory	GRB	6 hr
Apr 14, 9:43 AM CDT	Areal Flood Warning	GRB	9 hr
Apr 14, 9:48 AM CDT	Areal Flood Warning	GRB	9 hr
Apr 14, 4:37 PM CDT	River Flood Warning	GRB	44 hr
Apr 14, 6:51 PM CDT	Areal Flood Warning	GRB	9 hr
Apr 14, 6:53 PM CDT	Areal Flood Warning	GRB	9 hr
Apr 14, 9:11 PM CDT	Flash Flood Warning	GRB	3 hr
Apr 15, 2:34 AM CDT	Areal Flood Warning	GRB	11 hr
Apr 15, 2:58 AM CDT	Dense Fog Advisory	GRB	7 hr
Apr 15, 2:19 PM CDT	Dense Fog Advisory	GRB	20 hr
Apr 15, 2:30 PM CDT	Flood Watch	GRB	8 hr
Apr 16, 1:33 PM CDT	Flood Watch	GRB	37 hr
Apr 16, 8:36 PM CDT	Dense Fog Advisory	GRB	12 hr
Apr 17, 12:40 PM CDT	Tornado Watch	SPC	9 hr
Apr 29, 1:03 PM CDT	Frost Advisory	GRB	19 hr
Apr 30, 1:31 PM CDT	Frost Advisory	GRB	18 hr
May 1, 7:56 AM CDT	Freeze Warning	GRB	24 hr
May 5, 1:42 PM CDT	Frost Advisory	GRB	18 hr
May 6, 1:23 PM CDT	Frost Advisory	GRB	19 hr
May 7, 12:47 PM CDT	Frost Advisory	GRB	19 hr
May 10, 12:02 PM CDT	Freeze Warning	GRB	20 hr
May 12, 4:36 PM CDT	Mesoscale Discussion	SPC	114 min
May 12, 6:35 PM CDT	Special Weather Statement	GRB	40 min
May 17, 4:31 PM CDT	Special Weather Statement	GRB	44 min
May 26, 5:18 PM CDT	Special Weather Statement	GRB	57 min
Jun 5, 2:38 PM CDT	Mesoscale Discussion	SPC	97 min
Jun 5, 8:13 PM CDT	Severe Thunderstorm Warning	GRB	47 min
Jun 5, 8:24 PM CDT	Special Weather Statement	GRB	36 min
Jun 5, 9:18 PM CDT	Mesoscale Discussion	SPC	87 min
Jun 9, 10:31 PM CDT	Dense Fog Advisory	GRB	11 hr
Jun 10, 9:50 AM CDT	Special Weather Statement	GRB	55 min
Jun 10, 12:00 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 10, 3:25 PM CDT	Severe Thunderstorm Warning Destructive damage threat	GRB	50 min
Jun 10, 4:14 PM CDT	Special Weather Statement	GRB	46 min
Jun 16, 1:06 PM CDT	Special Weather Statement	GRB	54 min
Jun 16, 1:54 PM CDT	Severe Thunderstorm Warning	GRB	50 min
Jun 16, 2:17 PM CDT	Severe Thunderstorm Warning	GRB	26 min
Jun 16, 2:34 PM CDT	Areal Flood Advisory	GRB	78 min
Jun 24, 12:44 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 24, 1:55 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 24, 2:13 PM CDT	Special Weather Statement	GRB	32 min
Jun 24, 2:47 PM CDT	Areal Flood Advisory	GRB	3 hr
Jun 24, 3:02 PM CDT	Special Weather Statement	GRB	43 min
Jun 24, 5:13 PM CDT	Special Weather Statement	GRB	62 min
Jun 24, 5:25 PM CDT	Severe Thunderstorm Warning	GRB	65 min
Jun 24, 5:28 PM CDT	Mesoscale Discussion	SPC	92 min
Jun 24, 6:09 PM CDT	Areal Flood Advisory	GRB	3 hr
Jun 24, 6:29 PM CDT	Flash Flood Warning	GRB	3 hr
Jun 24, 7:02 PM CDT	Special Weather Statement	GRB	58 min
Jun 24, 9:29 PM CDT	Areal Flood Advisory	GRB	3 hr
Jun 28, 1:33 AM CDT	Extreme Heat Watch	GRB	10 hr
Jun 28, 11:54 AM CDT	Extreme Heat Warning	GRB	55 hr
Jun 30, 8:38 AM CDT	Severe Thunderstorm Watch	SPC	3 hr
Jun 30, 10:22 AM CDT	Special Weather Statement	GRB	53 min
Jun 30, 10:34 AM CDT	Mesoscale Discussion	SPC	116 min
Jun 30, 11:09 AM CDT	Special Weather Statement	GRB	51 min
Jun 30, 3:19 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 30, 5:33 PM CDT	Mesoscale Discussion	SPC	87 min
Jun 30, 5:59 PM CDT	Special Weather Statement	GRB	46 min
Jun 30, 7:05 PM CDT	Areal Flood Advisory	GRB	107 min
Jul 1, 12:35 AM CDT	Heat Advisory	GRB	19 hr
Jul 1, 6:59 AM CDT	Mesoscale Discussion	SPC	3 hr
Jul 1, 7:56 AM CDT	Severe Thunderstorm Warning	GRB	64 min
Jul 1, 11:05 AM CDT	Severe Thunderstorm Watch	SPC	3 hr
Jul 1, 11:23 AM CDT	Flood Watch	GRB	19 hr
Jul 1, 10:12 PM CDT	Areal Flood Advisory	GRB	6 hr
Jul 1, 10:21 PM CDT	Special Weather Statement	GRB	39 min
Jul 1, 10:51 PM CDT	Flash Flood Warning	GRB	3 hr
Jul 2, 12:03 AM CDT	Areal Flood Advisory	GRB	4 hr
Jul 2, 1:02 AM CDT	Areal Flood Advisory	GRB	3 hr
Jul 8, 1:59 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 8, 4:03 PM CDT	Areal Flood Advisory	GRB	4 hr
Jul 8, 4:20 PM CDT	Flash Flood Warning	GRB	3 hr
Jul 8, 4:20 PM CDT	Severe Thunderstorm Warning	GRB	40 min
Jul 8, 5:20 PM CDT	Areal Flood Advisory	GRB	106 min
Jul 12, 1:33 PM CDT	Heat Advisory	GRB	3 days
Jul 20, 3:49 PM CDT	Tornado Watch	SPC	7 hr
Jul 20, 8:04 PM CDT	Mesoscale Discussion	SPC	86 min
Jul 20, 9:52 PM CDT	Mesoscale Discussion	SPC	53 min
Jul 20, 10:48 PM CDT	Severe Thunderstorm Warning	GRB	27 min
Jul 26, 8:28 PM CDT	Mesoscale Discussion	SPC	92 min
Jul 26, 11:54 PM CDT	Mesoscale Discussion	SPC	96 min
Jul 27, 3:48 AM CDT	Special Weather Statement	GRB	27 min
Jul 27, 4:27 AM CDT	Special Weather Statement	GRB	33 min
Jul 27, 8:43 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 27, 9:40 AM CDT	Mesoscale Discussion	SPC	3 hr
Jul 27, 10:31 AM CDT	Severe Thunderstorm Warning Considerable damage threat	GRB	44 min
Jul 27, 10:45 AM CDT	Severe Thunderstorm Warning Destructive damage threat	GRB	45 min
Jul 27, 11:13 AM CDT	Severe Thunderstorm Warning Destructive damage threat	GRB	47 min
Jul 27, 11:21 AM CDT	Severe Thunderstorm Warning	GRB	39 min
Jul 27, 11:29 AM CDT	Severe Thunderstorm Warning Considerable damage threat	GRB	31 min
Jul 27, 11:38 AM CDT	Areal Flood Advisory	GRB	2 hr
Jul 27, 11:58 AM CDT	Severe Thunderstorm Warning Destructive damage threat	GRB	62 min
Jul 27, 4:57 PM CDT	Mesoscale Discussion	SPC	93 min
Aug 6, 3:09 AM CDT	Dense Fog Advisory	GRB	6 hr
Aug 11, 10:04 PM CDT	Mesoscale Discussion	SPC	116 min
Aug 12, 3:13 AM CDT	Special Weather Statement	GRB	47 min
Aug 18, 8:12 PM CDT	Special Weather Statement	GRB	63 min
Aug 22, 2:29 PM CDT	Special Weather Statement	GRB	46 min
Aug 22, 4:37 PM CDT	Special Weather Statement	GRB	38 min
Sep 2, 4:46 AM CDT	Special Weather Statement	GRB	44 min
Sep 2, 5:10 AM CDT	Severe Thunderstorm Warning	GRB	50 min
Sep 3, 7:52 AM CDT	Mesoscale Discussion	SPC	83 min
Sep 14, 10:38 PM CDT	Areal Flood Advisory	GRB	3 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	19
Severe Thunderstorm Watch	8
Tornado Watch	2
Mesoscale Discussion	19
Special Weather Statement	30
Flooding
Areal Flood Warning	5
Flash Flood Warning	6
River Flood Warning	3
Flood Watch	5
Areal Flood Advisory	15
Winter
Blizzard Warning	1
Winter Storm Warning	1
Winter Storm Watch	1
Winter Weather Advisory	9
Heat
Extreme Heat Warning	1
Extreme Heat Watch	1
Heat Advisory	2
Cold
Extreme Cold Warning	1
Freeze Warning	2
Extreme Cold Watch	1
Cold Weather Advisory	3
Frost Advisory	5
Wind and dust
Wind Advisory	1
Fog and smoke
Dense Fog Advisory	7

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2025

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.