Alert archive / Wisconsin / Milwaukee County

Weather alerts in Milwaukee County, Wisconsin, 2009

101 weather alerts in 2009, 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 2009. Tap one for its archive.

Alerts
101
Warnings
22
Watches
19
Advisories
47
Busiest month
June23 alerts
Busiest day
June 19, 20098 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 Milwaukee County in 2009 had a tornado report inside them.

Milwaukee County, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings20100%0
Severe thunderstorm warnings3233%4100%24 min
Flash flood warnings3233%888%88 min

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Milwaukee, WI: tornado warnings15753%1283%20 min
NWS Milwaukee, WI: severe thunderstorm warnings533632%12871%25 min
NWS Milwaukee, WI: flash flood warnings14936%3789%73 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 3, 2:51 AM CSTWinter Weather AdvisoryMKX25 hr
Jan 8, 2:00 PM CSTWinter Weather AdvisoryMKX46 hr
Jan 12, 4:08 AM CSTWinter Weather AdvisoryMKX26 hr
Jan 13, 3:31 AM CSTWinter Weather AdvisoryMKX11 hr
Jan 13, 3:38 PM CSTWind Chill AdvisoryMKX12 hr
Jan 14, 3:41 AM CSTWind Chill WarningMKX56 hr
Jan 16, 3:13 PM CSTWind Chill AdvisoryMKX8 hr
Jan 22, 7:32 AM CSTFreezing Fog AdvisoryMKX4 hr
Feb 2, 3:31 PM CSTLake Effect Snow AdvisoryMKX19 hr
Feb 9, 3:26 AM CSTDense Fog AdvisoryMKX4 hr
Feb 11, 5:40 AM CSTDense Fog AdvisoryMKX5 hr
Feb 16, 2:53 PM CSTWinter Storm WatchMKX13 hr
Feb 17, 3:29 AM CSTWinter Weather AdvisoryMKX30 hr
Feb 20, 4:00 AM CSTWinter Storm WatchMKX11 hr
Feb 20, 4:00 AM CSTWinter Weather AdvisoryMKX40 hr
Feb 20, 2:46 PM CSTWinter Storm WarningMKX27 hr
Feb 21, 5:35 AM CSTMesoscale DiscussionSPC5 hr
Feb 26, 3:38 AM CSTFlood WatchMKX17 hr
Feb 26, 4:55 PM CSTAreal Flood AdvisoryMKX4 hr
Feb 26, 5:10 PM CSTDense Fog AdvisoryMKX4 hr
Feb 26, 11:14 PM CSTWinter Weather AdvisoryMKX4 hr
Feb 27, 12:10 AM CSTMesoscale DiscussionSPC2 hr
Mar 2, 12:18 AM CSTLake Effect Snow AdvisoryMKX2 hr
Mar 2, 2:37 AM CSTLake Effect Snow WarningMKX15 hr
Mar 7, 9:37 PM CSTDense Fog AdvisoryMKX8 hr
Mar 8, 3:51 AM CDTFlash Flood WatchMKX14 hr
Mar 8, 9:04 AM CDTRiver Flood WatchMKX25 hr
Mar 9, 3:56 AM CDTHigh Wind WatchMKX16 hr
Mar 9, 7:58 PM CDTWind AdvisoryMKX37 hr
Mar 10, 11:59 AM CDTDense Fog AdvisoryMKX6 hr
Mar 24, 10:28 PM CDTMesoscale DiscussionSPC92 min
Mar 28, 4:04 AM CDTWinter Storm WarningMKX24 hr
Mar 29, 3:42 AM CDTMesoscale DiscussionSPC4 hr
Mar 29, 4:15 AM CDTWinter Weather AdvisoryMKX7 hr
Apr 4, 3:49 AM CDTWinter Weather AdvisoryMKX36 hr
Apr 25, 1:37 PM CDTAreal Flood AdvisoryMKX2 hr
Apr 26, 2:36 PM CDTRiver Flood WarningMKX30 hr
Apr 27, 5:09 AM CDTRiver Flood WarningMKX2 hr
Apr 30, 3:24 AM CDTDense Fog AdvisoryMKX7 hr
May 13, 10:12 PM CDTAreal Flood AdvisoryMKX105 min
May 13, 10:53 PM CDTSevere Thunderstorm WarningMKX31 min
May 14, 12:14 PM CDTRiver Flood WarningMKX9 hr
May 16, 3:37 AM CDTFrost AdvisoryMKX28 hr
Jun 8, 1:23 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 8, 3:53 PM CDTMesoscale DiscussionSPC67 min
Jun 8, 4:00 PM CDTAreal Flood AdvisoryMKX56 min
Jun 8, 4:03 PM CDTTornado WarningMKX27 min
Jun 18, 11:07 PM CDTMesoscale DiscussionSPC53 min
Jun 18, 11:30 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 19, 12:04 AM CDTFlash Flood WarningMKX4 hr
Jun 19, 12:56 AM CDTTornado WarningMKX40 min
Jun 19, 1:37 AM CDTRiver Flood WarningMKX10 hr
Jun 19, 1:42 AM CDTRiver Flood WarningMKX2 hr
Jun 19, 11:48 AM CDTFlash Flood WatchMKX14 hr
Jun 19, 4:54 PM CDTSevere Thunderstorm WatchSPC3 hr
Jun 19, 7:00 PM CDTRiver Flood WarningMKX38 hr
Jun 19, 7:18 PM CDTAreal Flood AdvisoryMKX3 hr
Jun 19, 7:39 PM CDTFlash Flood WarningMKX3 hr
Jun 19, 8:54 PM CDTRiver Flood WarningMKX7 hr
Jun 19, 9:41 PM CDTRiver Flood WarningMKX7 hr
Jun 20, 12:18 AM CDTAreal Flood AdvisoryMKX3 hr
Jun 22, 2:31 PM CDTHeat AdvisoryMKX28 hr
Jun 24, 4:21 AM CDTHeat AdvisoryMKX15 hr
Jun 27, 1:19 PM CDTMesoscale DiscussionSPC56 min
Jun 27, 2:41 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 27, 9:16 PM CDTMesoscale DiscussionSPC59 min
Jul 11, 2:31 AM CDTMesoscale DiscussionSPC29 min
Jul 27, 2:41 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 27, 6:45 PM CDTMesoscale DiscussionSPC90 min
Jul 30, 4:51 PM CDTMesoscale DiscussionSPC114 min
Aug 8, 2:24 PM CDTHeat AdvisoryMKX24 hr
Aug 9, 10:21 AM CDTSevere Thunderstorm WatchSPC8 hr
Aug 9, 2:30 PM CDTFlash Flood WatchMKX11 hr
Aug 9, 3:30 PM CDTAreal Flood AdvisoryMKX3 hr
Aug 9, 3:40 PM CDTSevere Thunderstorm WarningMKX50 min
Aug 9, 4:22 PM CDTFlash Flood WarningMKX105 min
Aug 9, 5:01 PM CDTSevere Thunderstorm WarningMKX59 min
Aug 9, 5:52 PM CDTSevere Thunderstorm WatchSPC8 hr
Aug 9, 10:55 PM CDTMesoscale DiscussionSPC95 min
Aug 9, 11:42 PM CDTMesoscale DiscussionSPC3 hr
Aug 10, 12:31 AM CDTAreal Flood AdvisoryMKX71 min
Sep 4, 3:39 AM CDTDense Fog AdvisoryMKX5 hr
Sep 9, 8:59 PM CDTDense Fog AdvisoryMKX12 hr
Sep 11, 12:27 AM CDTDense Fog AdvisoryMKX9 hr
Sep 11, 9:12 PM CDTDense Fog AdvisoryMKX12 hr
Sep 12, 9:27 PM CDTDense Fog AdvisoryMKX10 hr
Sep 26, 3:35 PM CDTWind AdvisoryMKX51 hr
Sep 27, 8:22 PM CDTTornado WatchSPC3 hr
Oct 9, 4:05 AM CDTFrost AdvisoryMKX28 hr
Oct 9, 4:05 AM CDTFreeze WatchMKX11 hr
Oct 9, 3:02 PM CDTFreeze WarningMKX41 hr
Nov 22, 11:29 PM CSTDense Fog AdvisoryMKX4 hr
Dec 3, 11:27 AM CSTWinter Weather AdvisoryMKX11 hr
Dec 6, 3:54 PM CSTWinter Storm WatchMKX23 hr
Dec 7, 3:21 PM CSTWinter Storm WarningMKX48 hr
Dec 9, 11:50 AM CSTWind Chill AdvisoryMKX23 hr
Dec 12, 2:49 PM CSTFreezing Rain AdvisoryMKX18 hr
Dec 22, 11:17 AM CSTWinter Storm WatchMKX17 hr
Dec 23, 3:54 AM CSTWinter Weather AdvisoryMKX32 hr
Dec 25, 3:27 AM CSTWind AdvisoryMKX9 hr
Dec 26, 9:28 AM CSTWinter Weather AdvisoryMKX12 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 archive20082010

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.