Alert archive / Michigan

Weather alerts in Benzie County, Michigan

1,719 weather alerts since 1986, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Benzie County and its neighbors

Each county as a circle sized by its count since 1986. Tap one for its archive.

Alerts
1,719
Warnings
380
Watches
253
Advisories
652
Busiest year
2008116 alerts
Average year
46over 37 years on file

Over time

By year

Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.

By month of the year

Warning verification

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

Severe thunderstorm warnings by year

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
20087271%0
2009110%0
20105260%2100%7 min
201110460%0
20123233%0
20132150%250%51 min
201430100%0
2015220%0
2016110%450%31 min
20173233%0
2018440%0
20194325%3100%48 min
20204250%0
202112650%250%23 min
20223167%0
20234325%1100%6 min
20243233%0
20254250%2100%12 min

Flash flood warnings by year

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
201110100%0
20132150%0
201410100%0
2019010%
202110100%0

Years from 2008, the first full year of storm-based warnings. The year still running is on its own page.

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.

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

The latest warnings

The most recent on file, newest first.

IssuedProductOfficeLasted
Aug 18, 7:53 PM EDTSevere Thunderstorm WarningAPX37 min
Jul 20, 1:20 AM EDTCoastal Flood WarningAPX10 min
Jul 2, 1:15 AM EDTSevere Thunderstorm WarningAPX60 min
Jul 1, 11:13 AM EDTSevere Thunderstorm WarningAPX47 min
Jul 1, 10:59 AM EDTSevere Thunderstorm WarningAPX46 min
Jun 10, 6:01 PM EDTSevere Thunderstorm WarningAPX74 min
May 17, 7:11 PM EDTSevere Thunderstorm WarningAPX49 min
May 17, 6:17 PM EDTSevere Thunderstorm WarningAPX58 min
May 16, 9:29 AM EDTRed Flag WarningAPX11 hr
May 10, 1:28 PM EDTFreeze WarningAPX19 hr
May 9, 1:47 AM EDTFreeze WarningAPX30 hr
May 6, 1:04 PM EDTFreeze WarningAPX19 hr

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive

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.