Alert archive / Wisconsin / Green County

Weather alerts in Green County, Wisconsin, 2020

105 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Green County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts
105
Warnings
14
Watches
15
Advisories
35
Busiest month
June19 alerts
Busiest day
June 29, 20207 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 2 tornado warnings covering Green County in 2020 had a tornado report inside them.

Green County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings20100%0
Severe thunderstorm warnings8625%1493%29 min
Flash flood warnings00

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Milwaukee, WI: tornado warnings13377%580%16 min
NWS Milwaukee, WI: severe thunderstorm warnings925441%21478%26 min
NWS Milwaukee, WI: flash flood warnings11827%2186%104 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 9, 3:09 PM CSTWinter Storm WatchMKX23 hr
Jan 10, 3:04 AM CSTWinter Storm WarningMKX44 hr
Jan 10, 1:58 PM CSTWinter Weather AdvisoryMKX33 hr
Jan 10, 5:50 PM CSTMesoscale DiscussionSPC6 hr
Jan 14, 2:02 PM CSTWinter Weather AdvisoryMKX22 hr
Jan 16, 2:08 PM CSTWinter Weather AdvisoryMKX52 hr
Jan 18, 3:10 PM CSTWind Chill AdvisoryMKX19 hr
Jan 24, 3:12 AM CSTWinter Weather AdvisoryMKX33 hr
Feb 8, 3:27 AM CSTWinter Weather AdvisoryMKX40 hr
Feb 13, 2:29 PM CSTWind Chill AdvisoryMKX20 hr
Feb 16, 2:55 PM CSTWinter Weather AdvisoryMKX33 hr
Feb 23, 2:03 PM CSTWinter Storm WatchMKX24 hr
Mar 5, 5:41 PM CSTWind AdvisoryMKX12 hr
Mar 9, 10:51 AM CDTRiver Flood WatchMKX35 hr
Mar 19, 10:51 AM CDTRiver Flood WatchMKX3 days
Mar 19, 10:51 AM CDTRiver Flood WatchMKX5 days
Mar 23, 5:17 AM CDTDense Fog AdvisoryMKX5 hr
Mar 28, 6:42 PM CDTMesoscale DiscussionSPC93 min
Mar 28, 8:26 PM CDTSpecial Weather StatementMKX34 min
Mar 28, 9:07 PM CDTSpecial Weather StatementMKX23 min
Apr 7, 3:55 PM CDTSevere Thunderstorm WatchSPC5 hr
Apr 7, 5:07 PM CDTMesoscale DiscussionSPC83 min
Apr 7, 5:40 PM CDTSevere Thunderstorm WarningMKX50 min
Apr 7, 6:16 PM CDTSevere Thunderstorm WarningMKX24 min
Apr 8, 12:30 AM CDTDense Fog AdvisoryMKX10 hr
Apr 12, 5:09 AM CDTDense Fog AdvisoryMKX6 hr
Apr 12, 2:34 PM CDTWind AdvisoryMKX25 hr
Apr 27, 11:19 PM CDTDense Fog AdvisoryMKX11 hr
May 7, 9:25 AM CDTFreeze WatchMKX18 hr
May 8, 3:53 AM CDTFreeze WarningMKX28 hr
May 10, 3:32 PM CDTFrost AdvisoryMKX16 hr
May 11, 2:52 PM CDTFrost AdvisoryMKX17 hr
May 15, 4:06 AM CDTDense Fog AdvisoryMKX5 hr
May 23, 12:33 PM CDTTornado WatchSPC8 hr
May 23, 2:51 PM CDTMesoscale DiscussionSPC84 min
May 26, 6:50 PM CDTSevere Thunderstorm WarningMKX40 min
May 27, 6:37 PM CDTSpecial Weather StatementMKX23 min
May 27, 6:58 PM CDTSpecial Weather StatementMKX62 min
Jun 2, 5:32 PM CDTMesoscale DiscussionSPC118 min
Jun 2, 5:48 PM CDTSevere Thunderstorm WatchSPC5 hr
Jun 2, 8:39 PM CDTSpecial Weather StatementMKX66 min
Jun 3, 12:52 AM CDTSpecial Weather StatementMKX53 min
Jun 5, 12:26 PM CDTMesoscale DiscussionSPC94 min
Jun 9, 2:12 PM CDTWind AdvisoryMKX14 hr
Jun 20, 5:25 PM CDTSpecial Weather StatementMKX50 min
Jun 26, 4:58 AM CDTSpecial Weather StatementMKX47 min
Jun 26, 9:25 AM CDTSpecial Weather StatementMKX35 min
Jun 26, 12:38 PM CDTMesoscale DiscussionSPC2 hr
Jun 26, 1:38 PM CDTSevere Thunderstorm WatchSPC8 hr
Jun 26, 3:39 PM CDTMesoscale DiscussionSPC2 hr
Jun 29, 1:11 PM CDTSpecial Weather StatementMKX49 min
Jun 29, 1:28 PM CDTMesoscale DiscussionSPC92 min
Jun 29, 1:35 PM CDTSevere Thunderstorm WarningMKX40 min
Jun 29, 1:52 PM CDTAreal Flood AdvisoryMKX3 hr
Jun 29, 1:59 PM CDTSpecial Weather StatementMKX46 min
Jun 29, 2:43 PM CDTSpecial Weather StatementMKX47 min
Jun 29, 3:22 PM CDTSpecial Weather StatementMKX53 min
Jul 7, 1:23 PM CDTMesoscale DiscussionSPC2 hr
Jul 7, 3:04 PM CDTHeat AdvisoryMKX28 hr
Jul 7, 5:25 PM CDTSpecial Weather StatementMKX65 min
Jul 9, 2:51 PM CDTMesoscale DiscussionSPC114 min
Jul 9, 3:39 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 9, 5:39 PM CDTMesoscale DiscussionSPC96 min
Jul 15, 1:33 AM CDTSpecial Weather StatementMKX42 min
Jul 15, 1:43 AM CDTSevere Thunderstorm WarningMKX19 min
Jul 17, 2:54 AM CDTHeat AdvisoryMKX41 hr
Jul 18, 10:27 AM CDTSpecial Weather StatementMKX63 min
Jul 18, 11:00 AM CDTMesoscale DiscussionSPC2 hr
Jul 18, 11:01 AM CDTSevere Thunderstorm WarningMKX32 min
Jul 26, 2:37 AM CDTHeat AdvisoryMKX16 hr
Jul 26, 5:02 PM CDTAreal Flood AdvisoryMKX3 hr
Jul 26, 5:33 PM CDTMesoscale DiscussionSPC87 min
Jul 26, 6:10 PM CDTAreal Flood AdvisoryMKX2 hr
Aug 9, 1:30 PM CDTMesoscale DiscussionSPC2 hr
Aug 9, 3:41 PM CDTSpecial Weather StatementMKX64 min
Aug 9, 4:47 PM CDTSpecial Weather StatementMKX28 min
Aug 10, 10:42 AM CDTMesoscale DiscussionSPC93 min
Aug 10, 11:26 AM CDTSevere Thunderstorm Watch PDSSPC7 hr
Aug 10, 1:23 PM CDTTornado WarningMKX27 min
Aug 10, 1:26 PM CDTSevere Thunderstorm WarningMKX64 min
Aug 10, 1:36 PM CDTMesoscale DiscussionSPC114 min
Aug 10, 2:26 PM CDTTornado WarningMKX17 min
Aug 10, 2:29 PM CDTSevere Thunderstorm WarningMKX61 min
Aug 15, 8:58 AM CDTSpecial Weather StatementMKX47 min
Aug 24, 10:55 PM CDTMesoscale DiscussionSPC2 hr
Aug 28, 2:56 PM CDTMesoscale DiscussionSPC64 min
Aug 28, 3:16 PM CDTSevere Thunderstorm WatchSPC4 hr
Oct 1, 3:29 AM CDTFrost AdvisoryMKX30 hr
Oct 3, 1:45 PM CDTFrost AdvisoryMKX18 hr
Oct 4, 9:27 AM CDTFrost AdvisoryMKX23 hr
Oct 15, 2:56 AM CDTFreeze WarningMKX29 hr
Oct 16, 2:21 PM CDTWind AdvisoryMKX29 hr
Oct 22, 4:53 PM CDTMesoscale DiscussionSPC2 hr
Oct 22, 6:54 PM CDTDense Fog AdvisoryMKX5 hr
Nov 1, 3:09 AM CSTWind AdvisoryMKX13 hr
Nov 10, 3:09 AM CSTWind AdvisoryMKX25 hr
Nov 10, 1:28 PM CSTMesoscale DiscussionSPC92 min
Nov 10, 2:05 PM CSTTornado WatchSPC6 hr
Nov 14, 1:08 PM CSTWind AdvisoryMKX32 hr
Nov 23, 1:44 PM CSTWinter Weather AdvisoryMKX22 hr
Nov 24, 8:22 PM CSTDense Fog AdvisoryMKX14 hr
Dec 11, 3:21 AM CSTWinter Weather AdvisoryMKX35 hr
Dec 28, 4:19 AM CSTWinter Storm WatchMKX10 hr
Dec 28, 1:49 PM CSTWinter Storm WarningMKX40 hr
Dec 29, 2:17 PM CSTMesoscale DiscussionSPC4 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.