Alert archive / Wisconsin / Brown County

Weather alerts in Brown County, Wisconsin, 2020

104 weather alerts in 2020, 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 2020. Tap one for its archive.

Alerts
104
Warnings
16
Watches
10
Advisories
47
Busiest month
May17 alerts
Busiest day
April 29, 20204 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, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings550%8100%8 min
Flash flood warnings00

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Green Bay, WI: tornado warnings10100%30%
NWS Green Bay, WI: severe thunderstorm warnings803853%11072%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.

IssuedProductOfficeLasted
Jan 8, 3:04 PM CSTWinter Weather AdvisoryGRB30 hr
Jan 9, 3:20 PM CSTWinter Storm WatchGRB24 hr
Jan 10, 3:16 PM CSTWinter Storm WarningGRB31 hr
Jan 10, 3:26 PM CSTLakeshore Flood AdvisoryGRB29 hr
Jan 11, 2:37 AM CSTWinter Weather AdvisoryGRB19 hr
Jan 16, 2:28 PM CSTWinter Weather AdvisoryGRB67 hr
Feb 8, 3:14 AM CSTWinter Weather AdvisoryGRB40 hr
Feb 8, 2:34 PM CSTWinter Storm WarningGRB28 hr
Feb 9, 10:56 AM CSTMesoscale DiscussionSPC5 hr
Feb 12, 2:58 PM CSTWinter Weather AdvisoryGRB15 hr
Feb 13, 2:30 PM CSTWind Chill AdvisoryGRB20 hr
Feb 16, 2:58 PM CSTWinter Weather AdvisoryGRB41 hr
Feb 17, 3:27 PM CSTMesoscale DiscussionSPC4 hr
Mar 28, 3:45 AM CDTLakeshore Flood AdvisoryGRB24 hr
Mar 28, 11:26 PM CDTSpecial Weather StatementGRB64 min
Apr 7, 3:06 PM CDTMesoscale DiscussionSPC114 min
Apr 8, 12:46 AM CDTDense Fog AdvisoryGRB9 hr
Apr 11, 2:49 PM CDTLakeshore Flood AdvisoryGRB52 hr
Apr 12, 3:50 AM CDTWind AdvisoryGRB39 hr
Apr 12, 12:30 PM CDTAreal Flood AdvisoryGRB15 hr
Apr 20, 7:37 PM CDTSevere Thunderstorm WarningGRB56 min
Apr 28, 12:52 AM CDTDense Fog AdvisoryGRB10 hr
Apr 28, 4:46 AM CDTLakeshore Flood AdvisoryGRB56 hr
Apr 29, 1:05 AM CDTLakeshore Flood WarningGRB18 hr
Apr 29, 11:14 AM CDTRiver Flood WarningGRB7 hr
Apr 29, 11:42 AM CDTSpecial Weather StatementGRB93 min
Apr 29, 12:16 PM CDTWind AdvisoryGRB7 hr
May 7, 9:15 AM CDTFreeze WarningGRB24 hr
May 7, 9:36 AM CDTFreeze WatchGRB18 hr
May 8, 3:31 AM CDTFreeze WarningGRB28 hr
May 10, 2:50 PM CDTFreeze WarningGRB17 hr
May 11, 2:52 PM CDTFreeze WarningGRB17 hr
May 12, 2:36 PM CDTFrost AdvisoryGRB17 hr
May 15, 4:02 AM CDTDense Fog AdvisoryGRB5 hr
May 16, 3:22 AM CDTLakeshore Flood WatchGRB12 hr
May 16, 3:08 PM CDTLakeshore Flood WarningGRB64 hr
May 17, 2:21 AM CDTFlood WatchGRB30 hr
May 17, 3:55 PM CDTAreal Flood AdvisoryGRB13 hr
May 17, 8:00 PM CDTWind AdvisoryGRB8 hr
May 18, 1:28 AM CDTAreal Flood AdvisoryGRB3 hr
May 18, 4:54 AM CDTAreal Flood WarningGRB26 hr
May 19, 6:54 AM CDTAreal Flood AdvisoryGRB6 hr
May 28, 10:33 AM CDTSpecial Weather StatementGRB87 min
May 28, 11:22 AM CDTAreal Flood AdvisoryGRB6 hr
Jun 1, 2:04 PM CDTSpecial Weather StatementGRB41 min
Jun 1, 2:49 PM CDTSpecial Weather StatementGRB41 min
Jun 2, 5:32 PM CDTMesoscale DiscussionSPC118 min
Jun 2, 5:48 PM CDTSevere Thunderstorm WatchSPC5 hr
Jun 2, 8:24 PM CDTSpecial Weather StatementGRB66 min
Jun 2, 8:37 PM CDTSevere Thunderstorm WarningGRB68 min
Jun 9, 3:37 PM CDTWind AdvisoryGRB14 hr
Jun 10, 4:18 PM CDTSpecial Weather StatementGRB57 min
Jun 10, 4:49 PM CDTAreal Flood AdvisoryGRB5 hr
Jun 11, 12:57 PM CDTSpecial Weather StatementGRB3 hr
Jun 11, 3:04 PM CDTSevere Thunderstorm WarningGRB41 min
Jun 11, 3:26 PM CDTMesoscale DiscussionSPC94 min
Jun 20, 6:37 PM CDTSpecial Weather StatementGRB38 min
Jun 29, 11:44 AM CDTSpecial Weather StatementGRB91 min
Jul 6, 3:08 PM CDTSevere Thunderstorm WarningGRB20 min
Jul 6, 3:47 PM CDTSpecial Weather StatementGRB28 min
Jul 6, 10:23 PM CDTSpecial Weather StatementGRB37 min
Jul 6, 10:45 PM CDTSpecial Weather StatementGRB30 min
Jul 9, 12:11 PM CDTFlood WatchGRB16 hr
Jul 9, 12:19 PM CDTSpecial Weather StatementGRB41 min
Jul 10, 3:06 AM CDTSpecial Weather StatementGRB54 min
Jul 10, 3:34 AM CDTAreal Flood AdvisoryGRB3 hr
Jul 10, 4:20 AM CDTFlood WatchGRB3 hr
Jul 10, 6:07 AM CDTAreal Flood AdvisoryGRB114 min
Jul 17, 2:30 PM CDTHeat AdvisoryGRB30 hr
Jul 18, 9:44 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 19, 1:13 AM CDTMesoscale DiscussionSPC92 min
Jul 19, 4:00 AM CDTSpecial Weather StatementGRB60 min
Jul 19, 4:40 AM CDTSevere Thunderstorm WarningGRB35 min
Aug 2, 3:09 PM CDTLakeshore Flood AdvisoryGRB30 hr
Aug 8, 9:32 PM CDTSpecial Weather StatementGRB43 min
Aug 10, 12:44 PM CDTMesoscale DiscussionSPC61 min
Aug 10, 12:58 PM CDTSevere Thunderstorm WatchSPC6 hr
Aug 27, 7:41 AM CDTSpecial Weather StatementGRB49 min
Aug 27, 8:21 AM CDTSpecial Weather StatementGRB39 min
Aug 27, 7:30 PM CDTFlash Flood WatchGRB17 hr
Sep 7, 3:08 PM CDTLakeshore Flood AdvisoryGRB48 hr
Sep 18, 1:43 PM CDTFrost AdvisoryGRB18 hr
Sep 25, 2:00 AM CDTDense Fog AdvisoryGRB5 hr
Sep 26, 3:07 PM CDTMesoscale DiscussionSPC83 min
Oct 1, 3:33 AM CDTFrost AdvisoryGRB29 hr
Oct 2, 2:22 PM CDTFrost AdvisoryGRB18 hr
Oct 4, 2:36 PM CDTFrost AdvisoryGRB17 hr
Oct 14, 9:06 PM CDTSpecial Weather StatementGRB39 min
Oct 14, 9:29 PM CDTSpecial Weather StatementGRB16 min
Oct 15, 3:03 AM CDTFreeze WarningGRB29 hr
Oct 17, 2:58 AM CDTWind AdvisoryGRB16 hr
Oct 22, 4:52 AM CDTLakeshore Flood AdvisoryGRB26 hr
Oct 22, 9:16 PM CDTAreal Flood AdvisoryGRB9 hr
Oct 31, 9:00 PM CDTWind AdvisoryGRB22 hr
Nov 1, 1:01 AM CSTLakeshore Flood AdvisoryGRB17 hr
Nov 10, 3:50 AM CSTWind AdvisoryGRB26 hr
Nov 10, 2:54 PM CSTSpecial Weather StatementGRB51 min
Nov 10, 3:39 PM CSTSpecial Weather StatementGRB66 min
Nov 14, 2:30 PM CSTWind AdvisoryGRB31 hr
Nov 24, 9:42 PM CSTDense Fog AdvisoryGRB9 hr
Dec 11, 3:42 AM CSTLakeshore Flood AdvisoryGRB34 hr
Dec 11, 3:58 AM CSTWinter Weather AdvisoryGRB35 hr
Dec 27, 3:38 AM CSTWinter Weather AdvisoryGRB19 hr
Dec 28, 2:03 PM CSTWinter Weather AdvisoryGRB43 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

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.