Alert archive / Wisconsin / Washington County

Weather alerts in Washington County, Wisconsin, 2018

101 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Washington County and its neighbors

Each county as a circle sized by its count in 2018. Tap one for its archive.

Alerts
101
Warnings
18
Watches
10
Advisories
49
Busiest month
August20 alerts
Busiest day
July 1, 20187 alerts

Over time

By month

Warning verification

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

1 of 2 tornado warnings covering Washington County in 2018 had a tornado report inside them; 2 of 3 tornado reports fell inside a warning, on average 3 minutes after it went out.

Washington County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings2150%367%3 min
Severe thunderstorm warnings9811%667%21 min
Flash flood warnings20100%20%

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Milwaukee, WI: tornado warnings16756%4374%15 min
NWS Milwaukee, WI: severe thunderstorm warnings794839%14778%21 min
NWS Milwaukee, WI: flash flood warnings191047%2181%71 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, 1:39 PM CSTWind Chill AdvisoryMKX20 hr
Jan 4, 1:45 PM CSTWind Chill AdvisoryMKX20 hr
Jan 5, 2:52 PM CSTWind Chill AdvisoryMKX19 hr
Jan 11, 2:57 AM CSTWinter Weather AdvisoryMKX17 hr
Jan 14, 3:15 AM CSTWinter Weather AdvisoryMKX55 hr
Jan 21, 6:49 AM CSTDense Fog AdvisoryMKX5 hr
Jan 21, 12:02 PM CSTDense Fog AdvisoryMKX18 hr
Jan 22, 7:49 PM CSTSpecial Weather StatementMKX41 min
Feb 2, 1:42 PM CSTWinter Weather AdvisoryMKX49 hr
Feb 4, 3:05 PM CSTWind Chill AdvisoryMKX18 hr
Feb 4, 3:05 PM CSTWinter Weather AdvisoryMKX30 hr
Feb 7, 5:01 PM CSTWinter Weather AdvisoryMKX43 hr
Feb 10, 2:35 PM CSTWinter Weather AdvisoryMKX21 hr
Feb 14, 4:29 PM CSTDense Fog AdvisoryMKX8 hr
Feb 18, 12:45 PM CSTWinter Weather AdvisoryMKX15 hr
Feb 19, 1:01 PM CSTDense Fog AdvisoryMKX18 hr
Feb 20, 3:19 PM CSTAreal Flood WarningMKX15 hr
Feb 22, 2:44 AM CSTWinter Weather AdvisoryMKX29 hr
Feb 24, 1:57 PM CSTWind AdvisoryMKX25 hr
Mar 4, 2:45 PM CSTWinter Weather AdvisoryMKX46 hr
Mar 31, 5:25 AM CDTWind AdvisoryMKX13 hr
Apr 2, 3:38 AM CDTWinter Weather AdvisoryMKX51 hr
Apr 13, 3:18 AM CDTWinter Storm WatchMKX12 hr
Apr 13, 9:43 AM CDTSevere Thunderstorm WarningMKX32 min
Apr 13, 9:58 AM CDTSevere Thunderstorm WarningMKX36 min
Apr 13, 3:17 PM CDTWinter Weather AdvisoryMKX52 hr
Apr 13, 3:20 PM CDTWind AdvisoryMKX28 hr
Apr 14, 6:02 PM CDTMesoscale DiscussionSPC6 hr
Apr 17, 4:04 AM CDTWinter Weather AdvisoryMKX45 hr
May 2, 8:17 PM CDTSevere Thunderstorm WarningMKX43 min
May 9, 2:18 PM CDTSpecial Weather StatementMKX27 min
May 9, 4:54 PM CDTTornado WarningMKX19 min
May 21, 11:01 AM CDTDense Fog AdvisoryMKX21 hr
May 27, 3:45 PM CDTSpecial Weather StatementMKX15 min
May 27, 4:19 PM CDTSevere Thunderstorm WarningMKX41 min
Jun 15, 12:58 PM CDTHeat AdvisoryMKX54 hr
Jun 28, 3:15 AM CDTHeat AdvisoryMKX67 hr
Jun 29, 2:31 AM CDTExcessive Heat WarningMKX61 hr
Jul 1, 11:37 AM CDTMesoscale DiscussionSPC83 min
Jul 1, 12:04 PM CDTTornado WatchSPC6 hr
Jul 1, 1:37 PM CDTMesoscale DiscussionSPC53 min
Jul 1, 2:43 PM CDTSevere Thunderstorm WarningMKX47 min
Jul 1, 2:51 PM CDTSpecial Weather StatementMKX24 min
Jul 1, 3:18 PM CDTMesoscale DiscussionSPC87 min
Jul 1, 3:26 PM CDTSevere Thunderstorm WarningMKX36 min
Jul 13, 3:54 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 13, 6:23 PM CDTMesoscale DiscussionSPC2 hr
Jul 13, 8:37 PM CDTMesoscale DiscussionSPC53 min
Jul 13, 8:41 PM CDTSpecial Weather StatementMKX49 min
Jul 20, 1:09 AM CDTSpecial Weather StatementMKX36 min
Jul 25, 11:53 PM CDTSpecial Weather StatementMKX52 min
Aug 3, 3:07 AM CDTDense Fog AdvisoryMKX6 hr
Aug 9, 2:24 PM CDTSpecial Weather StatementMKX36 min
Aug 17, 11:24 PM CDTDense Fog AdvisoryMKX10 hr
Aug 19, 4:22 AM CDTDense Fog AdvisoryMKX5 hr
Aug 19, 1:53 PM CDTFlash Flood WatchMKX41 hr
Aug 20, 10:38 PM CDTAreal Flood AdvisoryMKX3 hr
Aug 21, 12:11 AM CDTAreal Flood AdvisoryMKX3 hr
Aug 26, 4:42 PM CDTSevere Thunderstorm WatchSPC4 hr
Aug 26, 6:10 PM CDTTornado WarningMKX18 min
Aug 26, 9:38 PM CDTSevere Thunderstorm WarningMKX37 min
Aug 27, 2:14 AM CDTAreal Flood AdvisoryMKX3 hr
Aug 27, 5:03 AM CDTAreal Flood WarningMKX15 hr
Aug 27, 11:45 AM CDTFlash Flood WatchMKX35 hr
Aug 28, 1:45 AM CDTFlash Flood WarningMKX3 hr
Aug 28, 1:14 PM CDTSevere Thunderstorm WatchSPC8 hr
Aug 28, 3:24 PM CDTMesoscale DiscussionSPC96 min
Aug 28, 4:15 PM CDTSevere Thunderstorm WarningMKX60 min
Aug 28, 4:38 PM CDTFlash Flood WarningMKX7 hr
Aug 28, 4:41 PM CDTSevere Thunderstorm WarningMKX27 min
Aug 30, 2:54 PM CDTFlash Flood WatchMKX46 hr
Sep 2, 3:47 PM CDTMesoscale DiscussionSPC118 min
Sep 2, 4:58 PM CDTAreal Flood AdvisoryMKX3 hr
Sep 2, 5:35 PM CDTAreal Flood AdvisoryMKX3 hr
Sep 2, 7:15 PM CDTAreal Flood AdvisoryMKX4 hr
Sep 4, 5:22 PM CDTSpecial Weather StatementMKX23 min
Sep 21, 2:58 AM CDTSpecial Weather StatementMKX47 min
Sep 25, 1:36 PM CDTSevere Thunderstorm WatchSPC8 hr
Sep 25, 3:39 PM CDTMesoscale DiscussionSPC96 min
Sep 28, 2:44 AM CDTFrost AdvisoryMKX29 hr
Oct 3, 5:13 PM CDTMesoscale DiscussionSPC2 hr
Oct 4, 12:57 PM CDTFlash Flood WatchMKX41 hr
Oct 8, 7:08 AM CDTDense Fog AdvisoryMKX3 hr
Oct 9, 2:45 PM CDTMesoscale DiscussionSPC2 hr
Oct 9, 7:09 PM CDTSpecial Weather StatementMKX36 min
Oct 11, 3:13 AM CDTFreeze WarningMKX29 hr
Oct 12, 2:59 PM CDTFreeze WarningMKX18 hr
Oct 20, 9:32 AM CDTWind AdvisoryMKX8 hr
Oct 30, 2:49 PM CDTSpecial Weather StatementMKX41 min
Nov 9, 3:32 PM CSTWind AdvisoryMKX14 hr
Nov 24, 2:59 PM CSTWinter Weather AdvisoryMKX35 hr
Dec 11, 1:07 PM CSTWinter Weather AdvisoryMKX22 hr
Dec 12, 3:28 PM CSTWinter Weather AdvisoryMKX4 hr
Dec 12, 8:04 PM CSTDense Fog AdvisoryMKX14 hr
Dec 14, 8:18 AM CSTDense Fog AdvisoryMKX3 hr
Dec 14, 10:57 AM CSTDense Fog AdvisoryMKX63 min
Dec 16, 1:02 AM CSTDense Fog AdvisoryMKX7 hr
Dec 29, 6:10 PM CSTWinter Weather AdvisoryMKX4 hr
Dec 30, 2:29 PM CSTWinter Weather AdvisoryMKX37 hr
Dec 31, 9:58 AM CSTWinter Weather AdvisoryMKX17 hr
Dec 31, 11:50 AM CSTMesoscale DiscussionSPC6 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 archive20172019

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.