Alert archive / Wisconsin / Milwaukee County

Weather alerts in Milwaukee County, Wisconsin, 2011

97 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Milwaukee County and its neighbors

Each county as a circle sized by its count in 2011. Tap one for its archive.

Alerts
97
Warnings
19
Watches
18
Advisories
41
Busiest month
June21 alerts
Busiest day
July 11, 20116 alerts

Over time

By month

Warning verification

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

Milwaukee County, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings11827%1275%23 min
Flash flood warnings10100%0

Each office's whole area, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Milwaukee, WI: tornado warnings11555%1471%9 min
NWS Milwaukee, WI: severe thunderstorm warnings1296947%24581%24 min
NWS Milwaukee, WI: flash flood warnings20100%0

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 11, 3:34 AM CSTWinter Weather AdvisoryMKX16 hr
Jan 16, 3:11 PM CSTWinter Weather AdvisoryMKX33 hr
Jan 19, 3:03 PM CSTWind Chill AdvisoryMKX43 hr
Jan 28, 11:03 PM CSTWinter Weather AdvisoryMKX6 hr
Jan 30, 4:01 AM CSTWinter Storm WatchMKX49 hr
Jan 30, 12:25 PM CSTBlizzard WatchMKX27 hr
Jan 30, 12:25 PM CSTWinter Weather AdvisoryMKX51 hr
Jan 31, 3:31 PM CSTBlizzard WarningMKX43 hr
Jan 31, 3:47 PM CSTLakeshore Flood WatchMKX18 hr
Feb 1, 9:23 AM CSTLakeshore Flood WarningMKX24 hr
Feb 2, 2:33 AM CSTMesoscale DiscussionSPC4 hr
Feb 2, 2:18 PM CSTWind Chill AdvisoryMKX20 hr
Feb 6, 9:01 AM CSTWinter Weather AdvisoryMKX5 hr
Feb 8, 3:54 AM CSTWind Chill AdvisoryMKX30 hr
Feb 9, 3:07 PM CSTWind Chill AdvisoryMKX19 hr
Feb 16, 9:22 AM CSTDense Fog AdvisoryMKX22 hr
Feb 16, 1:02 PM CSTDense Fog AdvisoryMKX19 hr
Feb 18, 3:54 AM CSTWind AdvisoryMKX14 hr
Feb 18, 2:57 PM CSTWinter Storm WatchMKX19 hr
Feb 19, 9:49 AM CSTWinter Storm WarningMKX42 hr
Feb 20, 11:33 AM CSTWinter Weather AdvisoryMKX42 hr
Apr 3, 8:54 PM CDTSevere Thunderstorm WatchSPC5 hr
Apr 3, 10:23 PM CDTMesoscale DiscussionSPC67 min
Apr 4, 1:53 AM CDTMesoscale DiscussionSPC97 min
Apr 7, 7:50 PM CDTDense Fog AdvisoryMKX4 hr
Apr 10, 8:55 PM CDTMesoscale DiscussionSPC95 min
Apr 10, 10:21 PM CDTSevere Thunderstorm WarningMKX24 min
Apr 10, 10:34 PM CDTSevere Thunderstorm WarningMKX26 min
Apr 14, 3:08 PM CDTWind AdvisoryMKX30 hr
May 11, 3:38 PM CDTMesoscale DiscussionSPC2 hr
May 12, 3:30 AM CDTDense Fog AdvisoryMKX3 hr
May 12, 1:41 PM CDTSevere Thunderstorm WatchSPC5 hr
May 15, 3:34 AM CDTWind AdvisoryMKX14 hr
May 20, 9:48 PM CDTDense Fog AdvisoryMKX8 hr
May 22, 12:00 AM CDTDense Fog AdvisoryMKX7 hr
May 22, 4:41 AM CDTMesoscale DiscussionSPC2 hr
May 22, 1:49 PM CDTMesoscale DiscussionSPC56 min
May 22, 2:04 PM CDTTornado WatchSPC9 hr
May 22, 5:47 PM CDTMesoscale DiscussionSPC88 min
May 29, 2:47 AM CDTDense Fog AdvisoryMKX7 hr
May 29, 8:39 AM CDTMesoscale DiscussionSPC66 min
May 29, 8:28 PM CDTDense Fog AdvisoryMKX11 hr
Jun 6, 7:00 AM CDTSevere Thunderstorm WatchSPC5 hr
Jun 6, 10:12 AM CDTMesoscale DiscussionSPC93 min
Jun 6, 3:17 PM CDTHeat AdvisoryMKX29 hr
Jun 8, 11:08 AM CDTMesoscale DiscussionSPC97 min
Jun 8, 4:49 PM CDTSevere Thunderstorm WatchSPC8 hr
Jun 8, 8:05 PM CDTSevere Thunderstorm WarningMKX40 min
Jun 8, 8:15 PM CDTSevere Thunderstorm WarningMKX45 min
Jun 8, 8:43 PM CDTMesoscale DiscussionSPC92 min
Jun 8, 9:01 PM CDTSevere Thunderstorm WarningMKX59 min
Jun 15, 8:27 AM CDTHigh Wind WarningMKX83 min
Jun 19, 10:12 AM CDTAreal Flood AdvisoryMKX3 hr
Jun 20, 8:10 PM CDTDense Fog AdvisoryMKX16 hr
Jun 21, 11:45 AM CDTMesoscale DiscussionSPC3 hr
Jun 21, 3:10 PM CDTSevere Thunderstorm WarningMKX50 min
Jun 21, 3:42 PM CDTAreal Flood AdvisoryMKX3 hr
Jun 21, 5:42 PM CDTSevere Thunderstorm WatchSPC4 hr
Jun 21, 7:41 PM CDTAreal Flood AdvisoryMKX3 hr
Jun 21, 7:53 PM CDTSevere Thunderstorm WarningMKX12 min
Jun 21, 7:57 PM CDTFlash Flood WarningMKX4 hr
Jun 22, 10:21 PM CDTRiver Flood WarningMKX7 hr
Jun 30, 3:50 AM CDTHeat AdvisoryMKX41 hr
Jul 11, 3:30 AM CDTSevere Thunderstorm WatchSPC6 hr
Jul 11, 5:07 AM CDTMesoscale DiscussionSPC113 min
Jul 11, 5:13 AM CDTSevere Thunderstorm WarningMKX24 min
Jul 11, 7:10 AM CDTMesoscale DiscussionSPC95 min
Jul 11, 7:36 AM CDTSevere Thunderstorm WarningMKX54 min
Jul 11, 8:25 AM CDTSevere Thunderstorm WarningMKX35 min
Jul 16, 3:10 PM CDTHeat AdvisoryMKX61 hr
Jul 18, 8:05 AM CDTSevere Thunderstorm WatchSPC4 hr
Jul 18, 6:18 PM CDTSevere Thunderstorm WatchSPC3 hr
Jul 18, 9:06 PM CDTMesoscale DiscussionSPC54 min
Jul 19, 3:10 PM CDTHeat AdvisoryMKX48 hr
Jul 19, 11:27 PM CDTSevere Thunderstorm WatchSPC2 hr
Jul 23, 6:36 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 27, 9:48 PM CDTAreal Flood AdvisoryMKX3 hr
Aug 2, 4:00 AM CDTHeat AdvisoryMKX15 hr
Aug 2, 6:19 AM CDTMesoscale DiscussionSPC86 min
Aug 2, 12:57 PM CDTMesoscale DiscussionSPC93 min
Aug 2, 5:22 PM CDTSevere Thunderstorm WatchSPC9 hr
Sep 1, 4:26 AM CDTDense Fog AdvisoryMKX5 hr
Sep 3, 12:48 AM CDTSevere Thunderstorm WatchSPC6 hr
Sep 3, 3:40 AM CDTMesoscale DiscussionSPC95 min
Sep 3, 5:00 AM CDTSevere Thunderstorm WarningMKX46 min
Sep 15, 11:31 AM CDTFrost AdvisoryMKX20 hr
Sep 28, 3:16 PM CDTWind AdvisoryMKX34 hr
Sep 29, 2:57 PM CDTHigh Wind WarningMKX13 hr
Oct 1, 9:26 AM CDTFrost AdvisoryMKX24 hr
Oct 18, 3:11 PM CDTHigh Wind WatchMKX13 hr
Oct 19, 4:10 AM CDTHigh Wind WarningMKX24 hr
Oct 19, 4:10 AM CDTWind AdvisoryMKX29 hr
Oct 21, 3:06 PM CDTFrost AdvisoryMKX18 hr
Oct 27, 3:28 AM CDTFrost AdvisoryMKX28 hr
Nov 13, 3:34 AM CSTWind AdvisoryMKX13 hr
Nov 28, 2:37 PM CSTWind AdvisoryMKX28 hr
Dec 29, 5:38 AM CSTFreezing Rain AdvisoryMKX3 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 archive20102012

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.