Alert archive / Michigan / Lenawee County

Weather alerts in Lenawee County, Michigan, 2023

84 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Lenawee County and its neighbors

Each county as a circle sized by its count in 2023. Tap one for its archive.

Alerts
84
Warnings
18
Watches
11
Advisories
18
Busiest month
July26 alerts
Busiest day
April 1, 20236 alerts

Over time

By month

Warning verification

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

Lenawee County, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings11827%9100%14 min
Flash flood warnings00

Each office's whole area, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Detroit, MI: tornado warnings15567%2060%11 min
NWS Detroit, MI: severe thunderstorm warnings1107036%21290%27 min
NWS Detroit, MI: flash flood warnings4175%2100%0 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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 2, 3:21 AM ESTDense Fog AdvisoryDTX9 hr
Jan 3, 3:48 AM ESTDense Fog AdvisoryDTX3 hr
Jan 4, 3:20 AM ESTDense Fog AdvisoryDTX10 hr
Jan 12, 12:48 AM ESTDense Fog AdvisoryDTX7 hr
Jan 23, 3:50 PM ESTWinter Storm WatchDTX23 hr
Jan 24, 2:56 PM ESTWinter Storm WarningDTX31 hr
Jan 25, 10:14 AM ESTMesoscale DiscussionSPC6 hr
Feb 2, 2:03 PM ESTWind Chill AdvisoryDTX19 hr
Feb 8, 3:04 PM ESTWind AdvisoryDTX31 hr
Feb 14, 3:42 AM ESTWind AdvisoryDTX36 hr
Feb 15, 3:43 PM ESTWinter Weather AdvisoryDTX36 hr
Feb 21, 3:33 PM ESTIce Storm WarningDTX36 hr
Feb 21, 3:33 PM ESTWinter Weather AdvisoryDTX27 hr
Feb 22, 4:27 PM ESTMesoscale DiscussionSPC4 hr
Mar 2, 3:53 AM ESTWinter Storm WatchDTX18 hr
Mar 2, 10:08 PM ESTWinter Storm WarningDTX30 hr
Mar 3, 5:25 PM ESTMesoscale DiscussionSPC4 hr
Mar 9, 3:20 AM ESTWinter Weather AdvisoryDTX41 hr
Mar 24, 3:48 PM EDTWind AdvisoryDTX32 hr
Mar 31, 8:10 PM EDTSevere Thunderstorm WarningDTX26 min
Mar 31, 11:40 PM EDTSpecial Weather StatementDTX65 min
Apr 1, 12:18 AM EDTSpecial Weather StatementDTX57 min
Apr 1, 12:50 AM EDTSevere Thunderstorm WarningDTX39 min
Apr 1, 10:39 AM EDTSpecial Weather StatementDTX81 min
Apr 1, 10:51 AM EDTSevere Thunderstorm WarningDTX39 min
Apr 5, 7:09 AM EDTMesoscale DiscussionSPC2 hr
Apr 5, 8:41 AM EDTTornado WatchSPC7 hr
Apr 5, 10:57 AM EDTMesoscale DiscussionSPC93 min
Apr 23, 2:47 PM EDTFreeze WarningDTX13 hr
Apr 24, 3:00 PM EDTFreeze WarningDTX17 hr
Apr 25, 10:38 AM EDTFreeze WarningDTX21 hr
Apr 26, 10:49 AM EDTFreeze WarningDTX21 hr
May 3, 3:40 PM EDTFrost AdvisoryDTX17 hr
May 17, 3:12 PM EDTFrost AdvisoryDTX16 hr
Jun 15, 4:21 PM EDTMesoscale DiscussionSPC114 min
Jun 15, 5:04 PM EDTSpecial Weather StatementDTX41 min
Jun 25, 3:46 PM EDTMesoscale DiscussionSPC89 min
Jun 25, 4:18 PM EDTTornado WatchSPC4 hr
Jun 25, 4:51 PM EDTSevere Thunderstorm Warning Considerable damage threatDTX69 min
Jun 25, 7:03 PM EDTSevere Thunderstorm WarningDTX57 min
Jul 1, 1:17 PM EDTSpecial Weather StatementDTX43 min
Jul 2, 7:41 PM EDTSpecial Weather StatementDTX49 min
Jul 11, 5:18 PM EDTSevere Thunderstorm WarningDTX72 min
Jul 11, 7:13 PM EDTSpecial Weather StatementDTX62 min
Jul 12, 8:55 PM EDTTornado WatchSPC6 hr
Jul 12, 10:46 PM EDTMesoscale DiscussionSPC59 min
Jul 13, 12:59 AM EDTMesoscale DiscussionSPC91 min
Jul 14, 2:32 PM EDTMesoscale DiscussionSPC2 hr
Jul 14, 8:57 PM EDTSpecial Weather StatementDTX63 min
Jul 14, 9:25 PM EDTSevere Thunderstorm WarningDTX42 min
Jul 20, 12:16 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 20, 2:51 PM EDTMesoscale DiscussionSPC84 min
Jul 20, 5:01 PM EDTMesoscale DiscussionSPC89 min
Jul 26, 1:45 PM EDTMesoscale DiscussionSPC90 min
Jul 26, 2:03 PM EDTSevere Thunderstorm WatchSPC5 hr
Jul 26, 2:18 PM EDTSevere Thunderstorm WarningDTX72 min
Jul 26, 6:33 PM EDTSevere Thunderstorm WatchSPC5 hr
Jul 26, 6:58 PM EDTSpecial Weather StatementDTX47 min
Jul 26, 7:44 PM EDTSpecial Weather StatementDTX31 min
Jul 26, 8:02 PM EDTMesoscale DiscussionSPC88 min
Jul 26, 8:57 PM EDTSpecial Weather StatementDTX48 min
Jul 28, 3:36 AM EDTFlood WatchDTX25 hr
Jul 29, 12:47 AM EDTSpecial Weather StatementDTX58 min
Jul 29, 12:53 AM EDTSevere Thunderstorm WarningDTX55 min
Jul 29, 1:57 AM EDTMesoscale DiscussionSPC2 hr
Jul 29, 2:52 AM EDTSevere Thunderstorm WatchSPC6 hr
Aug 11, 3:14 PM EDTMesoscale DiscussionSPC2 hr
Aug 11, 8:16 PM EDTMesoscale DiscussionSPC89 min
Aug 12, 12:41 PM EDTSpecial Weather StatementDTX64 min
Aug 14, 6:58 PM EDTSpecial Weather StatementDTX62 min
Aug 23, 3:20 PM EDTHeat AdvisoryDTX29 hr
Aug 24, 4:03 AM EDTMesoscale DiscussionSPC117 min
Aug 24, 4:44 PM EDTMesoscale DiscussionSPC3 hr
Aug 24, 6:35 PM EDTSevere Thunderstorm WatchSPC5 hr
Aug 24, 8:08 PM EDTMesoscale DiscussionSPC97 min
Aug 24, 9:33 PM EDTMesoscale DiscussionSPC87 min
Aug 24, 9:50 PM EDTSevere Thunderstorm Warning Considerable damage threatDTX69 min
Aug 24, 11:42 PM EDTMesoscale DiscussionSPC2 hr
Sep 6, 7:38 PM EDTSpecial Weather StatementDTX67 min
Sep 6, 8:03 PM EDTSevere Thunderstorm WarningDTX27 min
Sep 30, 1:35 AM EDTDense Fog AdvisoryDTX10 hr
Dec 24, 3:21 AM ESTDense Fog AdvisoryDTX8 hr
Dec 24, 6:42 PM ESTDense Fog AdvisoryDTX9 hr
Dec 25, 6:17 AM ESTDense Fog AdvisoryDTX5 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 archive20222024

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.