Alert archive / Michigan / Livingston County

Weather alerts in Livingston County, Michigan, 2021

113 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Livingston County and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts
113
Warnings
29
Watches
14
Advisories
22
Busiest month
June27 alerts
Busiest day
August 11, 20217 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 1 tornado warnings covering Livingston County in 2021 had a tornado report inside them.

Livingston County, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings171512%20100%20 min
Flash flood warnings10100%0

Each office's whole area, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Detroit, MI: tornado warnings16569%1250%4 min
NWS Detroit, MI: severe thunderstorm warnings1349728%23989%26 min
NWS Detroit, MI: flash flood warnings90100%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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 25, 3:37 PM ESTWinter Weather AdvisoryDTX31 hr
Feb 4, 3:59 AM ESTWinter Weather AdvisoryDTX39 hr
Feb 14, 3:57 PM ESTWinter Weather AdvisoryDTX18 hr
Feb 15, 10:10 AM ESTWinter Storm WarningDTX26 hr
Feb 15, 3:52 PM ESTMesoscale DiscussionSPC6 hr
Mar 18, 3:28 AM EDTWind AdvisoryDTX17 hr
Mar 24, 2:07 PM EDTSpecial Weather StatementDTX53 min
Apr 20, 3:14 AM EDTFreeze WarningDTX53 hr
May 9, 2:53 PM EDTFrost AdvisoryDTX17 hr
May 10, 2:23 PM EDTFreeze WarningDTX17 hr
May 11, 2:41 PM EDTFrost AdvisoryDTX17 hr
May 12, 3:28 PM EDTFrost AdvisoryDTX16 hr
May 29, 2:50 PM EDTFrost AdvisoryDTX16 hr
Jun 11, 6:33 PM EDTSpecial Weather StatementDTX57 min
Jun 11, 7:50 PM EDTSpecial Weather StatementDTX55 min
Jun 12, 6:19 PM EDTMesoscale DiscussionSPC116 min
Jun 12, 6:45 PM EDTSevere Thunderstorm WarningDTX75 min
Jun 12, 7:59 PM EDTSevere Thunderstorm WarningDTX76 min
Jun 18, 7:52 AM EDTSpecial Weather StatementDTX83 min
Jun 19, 3:38 PM EDTSpecial Weather StatementDTX52 min
Jun 20, 6:06 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 20, 8:14 PM EDTMesoscale DiscussionSPC61 min
Jun 20, 9:34 PM EDTSevere Thunderstorm WarningDTX44 min
Jun 20, 11:51 PM EDTMesoscale DiscussionSPC54 min
Jun 21, 1:00 AM EDTSevere Thunderstorm WatchSPC7 hr
Jun 21, 2:14 AM EDTMesoscale DiscussionSPC2 hr
Jun 21, 3:15 AM EDTSpecial Weather StatementDTX60 min
Jun 25, 5:48 PM EDTMesoscale DiscussionSPC87 min
Jun 26, 4:00 AM EDTFlood WatchDTX22 hr
Jun 26, 3:47 PM EDTMesoscale DiscussionSPC118 min
Jun 26, 4:04 PM EDTTornado WatchSPC6 hr
Jun 26, 6:41 PM EDTSevere Thunderstorm WarningDTX79 min
Jun 26, 7:08 PM EDTMesoscale DiscussionSPC67 min
Jun 26, 7:38 PM EDTTornado WarningDTX35 min
Jun 26, 9:23 PM EDTMesoscale DiscussionSPC67 min
Jun 29, 4:24 AM EDTSpecial Weather StatementDTX66 min
Jun 29, 12:48 PM EDTSpecial Weather StatementDTX57 min
Jun 29, 12:54 PM EDTMesoscale DiscussionSPC2 hr
Jun 29, 1:06 PM EDTSevere Thunderstorm WarningDTX54 min
Jun 29, 1:38 PM EDTSpecial Weather StatementDTX97 min
Jul 6, 5:29 PM EDTSpecial Weather StatementDTX31 min
Jul 6, 5:48 PM EDTSpecial Weather StatementDTX27 min
Jul 7, 12:07 PM EDTMesoscale DiscussionSPC83 min
Jul 7, 1:31 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 7, 1:54 PM EDTSpecial Weather StatementDTX51 min
Jul 7, 3:38 PM EDTSevere Thunderstorm WarningDTX67 min
Jul 7, 3:59 PM EDTMesoscale DiscussionSPC91 min
Jul 8, 8:43 AM EDTSpecial Weather StatementDTX47 min
Jul 13, 3:34 PM EDTSpecial Weather StatementDTX71 min
Jul 20, 6:59 PM EDTSpecial Weather StatementDTX61 min
Jul 24, 2:21 PM EDTMesoscale DiscussionSPC114 min
Jul 24, 3:16 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 24, 6:21 PM EDTMesoscale DiscussionSPC114 min
Jul 24, 7:07 PM EDTSpecial Weather StatementDTX53 min
Jul 24, 7:40 PM EDTSevere Thunderstorm WarningDTX80 min
Jul 25, 4:03 AM EDTDense Fog AdvisoryDTX5 hr
Jul 28, 2:36 PM EDTFlash Flood WatchDTX17 hr
Aug 9, 1:29 PM EDTSpecial Weather StatementDTX46 min
Aug 9, 1:49 PM EDTSevere Thunderstorm WarningDTX30 min
Aug 10, 10:57 PM EDTMesoscale DiscussionSPC93 min
Aug 10, 11:53 PM EDTSpecial Weather StatementDTX52 min
Aug 11, 12:02 AM EDTSevere Thunderstorm WarningDTX58 min
Aug 11, 4:04 AM EDTHeat AdvisoryDTX13 hr
Aug 11, 2:12 PM EDTMesoscale DiscussionSPC93 min
Aug 11, 2:32 PM EDTSevere Thunderstorm WatchSPC4 hr
Aug 11, 2:42 PM EDTSevere Thunderstorm WarningDTX63 min
Aug 11, 10:17 PM EDTMesoscale DiscussionSPC88 min
Aug 11, 10:42 PM EDTSpecial Weather StatementDTX63 min
Aug 12, 2:04 AM EDTAreal Flood AdvisoryDTX2 hr
Aug 12, 4:33 AM EDTFlash Flood WarningDTX2 hr
Aug 12, 6:31 AM EDTSevere Thunderstorm WarningDTX59 min
Aug 12, 6:43 AM EDTAreal Flood WarningDTX2 hr
Aug 12, 7:35 AM EDTRiver Flood WarningDTX18 days
Aug 24, 6:19 PM EDTMesoscale DiscussionSPC116 min
Aug 24, 7:45 PM EDTSevere Thunderstorm WarningDTX35 min
Aug 25, 3:21 AM EDTHeat AdvisoryDTX17 hr
Aug 28, 3:42 AM EDTHeat AdvisoryDTX16 hr
Aug 29, 1:46 PM EDTSevere Thunderstorm WatchSPC6 hr
Aug 29, 4:27 PM EDTMesoscale DiscussionSPC93 min
Aug 29, 5:25 PM EDTSevere Thunderstorm WarningDTX65 min
Sep 7, 2:48 PM EDTMesoscale DiscussionSPC117 min
Sep 7, 3:20 PM EDTSevere Thunderstorm WatchSPC7 hr
Sep 7, 5:37 PM EDTMesoscale DiscussionSPC83 min
Sep 7, 5:55 PM EDTSevere Thunderstorm WarningDTX80 min
Sep 7, 9:00 PM EDTHigh Wind WarningDTX94 min
Sep 12, 5:22 PM EDTSevere Thunderstorm WatchSPC4 hr
Sep 12, 6:52 PM EDTMesoscale DiscussionSPC113 min
Sep 13, 1:19 PM EDTSevere Thunderstorm WarningDTX56 min
Sep 14, 2:12 PM EDTMesoscale DiscussionSPC2 hr
Sep 14, 3:08 PM EDTSevere Thunderstorm WatchSPC7 hr
Sep 14, 4:03 PM EDTSevere Thunderstorm WarningDTX24 min
Sep 14, 5:43 PM EDTSpecial Weather StatementDTX47 min
Sep 14, 5:49 PM EDTSevere Thunderstorm WarningDTX41 min
Sep 14, 6:04 PM EDTMesoscale DiscussionSPC86 min
Sep 14, 6:50 PM EDTSpecial Weather StatementDTX25 min
Sep 21, 3:08 AM EDTFlood WatchDTX48 hr
Sep 22, 11:11 AM EDTRiver Flood WarningDTX16 days
Oct 23, 3:02 PM EDTFrost AdvisoryDTX18 hr
Oct 27, 11:49 AM EDTRiver Flood WarningDTX9 days
Nov 10, 2:24 AM ESTDense Fog AdvisoryDTX5 hr
Nov 21, 7:06 PM ESTSpecial Weather StatementDTX54 min
Nov 27, 3:21 AM ESTWinter Weather AdvisoryDTX19 hr
Nov 28, 2:42 PM ESTSnow Squall WarningDTX63 min
Nov 28, 3:15 PM ESTMesoscale DiscussionSPC2 hr
Nov 29, 5:49 PM ESTWinter Weather AdvisoryDTX10 hr
Dec 6, 3:37 AM ESTWind AdvisoryDTX15 hr
Dec 9, 3:36 PM ESTHigh Wind WatchDTX23 hr
Dec 10, 2:31 PM ESTHigh Wind WarningDTX25 hr
Dec 10, 2:31 PM ESTWind AdvisoryDTX18 hr
Dec 11, 1:33 AM ESTSpecial Weather StatementDTX87 min
Dec 11, 3:25 PM ESTWind AdvisoryDTX4 hr
Dec 15, 3:40 AM ESTWind AdvisoryDTX40 hr
Dec 26, 10:49 PM ESTWinter Weather AdvisoryDTX10 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 archive20202022

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.