Alert archive / Wisconsin / Ozaukee County

Weather alerts in Ozaukee County, Wisconsin, 2020

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

Ozaukee County and its neighbors

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

Alerts
112
Warnings
15
Watches
15
Advisories
44
Busiest month
July19 alerts
Busiest day
May 17, 20205 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 Ozaukee County in 2020 had a tornado report inside them.

Ozaukee County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings8450%9100%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 8, 7:00 PM CSTLakeshore Flood AdvisoryMKX17 hr
Jan 9, 3:20 AM CSTLakeshore Flood WatchMKX34 hr
Jan 9, 3:09 PM CSTWinter Storm WatchMKX23 hr
Jan 10, 3:04 AM CSTWinter Storm WarningMKX44 hr
Jan 10, 1:41 PM CSTLakeshore Flood AdvisoryMKX33 hr
Jan 10, 5:50 PM CSTMesoscale DiscussionSPC6 hr
Jan 16, 2:08 PM CSTWinter Weather AdvisoryMKX52 hr
Jan 16, 4:05 PM CSTLakeshore Flood AdvisoryMKX41 hr
Feb 8, 3:27 AM CSTWinter Weather AdvisoryMKX40 hr
Feb 9, 10:56 AM CSTMesoscale DiscussionSPC5 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
Feb 25, 2:40 AM CSTLakeshore Flood AdvisoryMKX27 hr
Mar 5, 5:41 PM CSTWind AdvisoryMKX12 hr
Mar 24, 10:19 PM CDTDense Fog AdvisoryMKX9 hr
Mar 28, 1:44 PM CDTDense Fog AdvisoryMKX8 hr
Apr 7, 3:06 PM CDTMesoscale DiscussionSPC114 min
Apr 7, 3:40 PM CDTSevere Thunderstorm WarningMKX35 min
Apr 7, 3:55 PM CDTSevere Thunderstorm WatchSPC5 hr
Apr 7, 4:06 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 20, 8:02 PM CDTSpecial Weather StatementMKX58 min
Apr 27, 11:19 PM CDTDense Fog AdvisoryMKX11 hr
Apr 29, 2:47 AM CDTDense Fog AdvisoryMKX7 hr
Apr 29, 6:15 PM CDTLakeshore Flood AdvisoryMKX19 hr
May 7, 9:25 AM CDTFreeze WatchMKX18 hr
May 8, 3:53 AM CDTFreeze WarningMKX28 hr
May 11, 2:52 PM CDTFrost AdvisoryMKX17 hr
May 12, 2:29 PM CDTFrost AdvisoryMKX18 hr
May 15, 4:06 AM CDTDense Fog AdvisoryMKX5 hr
May 16, 3:00 AM CDTLakeshore Flood AdvisoryMKX64 hr
May 17, 2:16 AM CDTFlood WatchMKX23 hr
May 17, 3:43 PM CDTAreal Flood AdvisoryMKX6 hr
May 17, 5:17 PM CDTAreal Flood WarningMKX12 hr
May 17, 6:05 PM CDTRiver Flood WatchMKX4 hr
May 17, 6:05 PM CDTRiver Flood WatchMKX4 hr
May 18, 3:56 AM CDTRiver Flood WarningMKX70 hr
May 22, 11:36 PM CDTDense Fog AdvisoryMKX9 hr
Jun 2, 5:32 PM CDTMesoscale DiscussionSPC118 min
Jun 2, 5:48 PM CDTSevere Thunderstorm WatchSPC5 hr
Jun 2, 8:44 PM CDTSevere Thunderstorm WarningMKX61 min
Jun 2, 9:28 PM CDTMesoscale DiscussionSPC2 hr
Jun 5, 6:46 AM CDTSpecial Weather StatementMKX44 min
Jun 8, 2:59 PM CDTBeach Hazards StatementMKX34 hr
Jun 9, 2:12 PM CDTWind AdvisoryMKX14 hr
Jun 11, 3:26 PM CDTMesoscale DiscussionSPC94 min
Jun 11, 4:26 PM CDTSpecial Weather StatementMKX34 min
Jun 20, 12:43 PM CDTSpecial Weather StatementMKX47 min
Jun 20, 5:06 PM CDTTornado WarningMKX21 min
Jun 20, 5:17 PM CDTSevere Thunderstorm WarningMKX28 min
Jun 20, 5:44 PM CDTSpecial Weather StatementMKX31 min
Jun 26, 1:38 PM CDTSevere Thunderstorm WatchSPC8 hr
Jul 7, 6:00 PM CDTAreal Flood AdvisoryMKX2 hr
Jul 7, 6:29 PM CDTAreal Flood AdvisoryMKX2 hr
Jul 9, 3:08 PM CDTSevere Thunderstorm WarningMKX36 min
Jul 9, 3:39 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 9, 7:24 PM CDTSevere Thunderstorm WarningMKX66 min
Jul 9, 7:34 PM CDTAreal Flood AdvisoryMKX3 hr
Jul 9, 7:53 PM CDTSevere Thunderstorm WarningMKX47 min
Jul 11, 5:09 PM CDTBeach Hazards StatementMKX29 hr
Jul 13, 4:59 PM CDTBeach Hazards StatementMKX28 hr
Jul 15, 4:53 PM CDTAreal Flood AdvisoryMKX3 hr
Jul 17, 2:54 AM CDTHeat AdvisoryMKX41 hr
Jul 18, 4:15 PM CDTSpecial Weather StatementMKX45 min
Jul 19, 3:44 AM CDTMesoscale DiscussionSPC91 min
Jul 19, 4:44 AM CDTSevere Thunderstorm WarningMKX31 min
Jul 19, 5:17 AM CDTSpecial Weather StatementMKX28 min
Jul 26, 2:37 AM CDTHeat AdvisoryMKX16 hr
Jul 26, 5:33 PM CDTMesoscale DiscussionSPC87 min
Jul 26, 5:45 PM CDTAreal Flood AdvisoryMKX2 hr
Jul 28, 7:06 PM CDTSpecial Weather StatementMKX24 min
Aug 2, 2:28 PM CDTSpecial Weather StatementMKX32 min
Aug 2, 3:19 PM CDTBeach Hazards StatementMKX46 hr
Aug 2, 3:19 PM CDTLakeshore Flood AdvisoryMKX36 hr
Aug 7, 3:27 PM CDTBeach Hazards StatementMKX33 hr
Aug 9, 6:33 AM CDTSpecial Weather StatementMKX42 min
Aug 10, 12:58 PM CDTSevere Thunderstorm WatchSPC6 hr
Aug 25, 4:18 AM CDTSpecial Weather StatementMKX42 min
Aug 25, 9:33 AM CDTSpecial Weather StatementMKX42 min
Aug 25, 10:07 AM CDTMesoscale DiscussionSPC113 min
Aug 27, 6:53 PM CDTFlash Flood WatchMKX19 hr
Aug 28, 11:31 AM CDTSpecial Weather StatementMKX44 min
Aug 31, 3:40 AM CDTBeach Hazards StatementMKX15 hr
Sep 5, 3:53 PM CDTBeach Hazards StatementMKX35 hr
Sep 5, 3:53 PM CDTLakeshore Flood AdvisoryMKX33 hr
Sep 6, 6:47 PM CDTMesoscale DiscussionSPC118 min
Sep 7, 2:32 PM CDTBeach Hazards StatementMKX3 days
Sep 7, 2:32 PM CDTLakeshore Flood AdvisoryMKX66 hr
Sep 11, 3:18 AM CDTBeach Hazards StatementMKX41 hr
Sep 16, 3:01 AM CDTBeach Hazards StatementMKX37 hr
Sep 17, 7:49 PM CDTBeach Hazards StatementMKX20 hr
Sep 19, 2:10 PM CDTBeach Hazards StatementMKX53 hr
Sep 25, 2:44 AM CDTBeach Hazards StatementMKX18 hr
Sep 26, 12:54 PM CDTBeach Hazards StatementMKX9 hr
Oct 1, 3:29 AM CDTFrost AdvisoryMKX30 hr
Oct 4, 9:27 AM CDTFrost AdvisoryMKX23 hr
Oct 15, 2:56 AM CDTFreeze WarningMKX29 hr
Oct 16, 2:20 PM CDTLakeshore Flood AdvisoryMKX28 hr
Oct 16, 2:21 PM CDTWind AdvisoryMKX29 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
Dec 10, 2:23 PM CSTLakeshore Flood WatchMKX13 hr
Dec 11, 3:10 AM CSTLakeshore Flood WarningMKX39 hr
Dec 11, 3:21 AM CSTWinter Weather AdvisoryMKX35 hr
Dec 28, 1:49 PM CSTWinter Weather AdvisoryMKX43 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.