Alert archive / Michigan / Cass County

Weather alerts in Cass County, Michigan, 2024

111 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Cass County and its neighbors

Each county as a circle sized by its count in 2024. Tap one for its archive.

Alerts
111
Warnings
34
Watches
16
Advisories
22
Busiest month
June22 alerts
Busiest day
June 25, 20249 alerts

Over time

By month

Warning verification

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

4 of 6 tornado warnings covering Cass County in 2024 had a tornado report inside them; 3 of 3 tornado reports fell inside a warning, on average 15 minutes after it went out.

Cass County, 2024

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings6433%3100%15 min
Severe thunderstorm warnings161038%1050%5 min
Flash flood warnings00

Each office's whole area, 2024

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Northern Indiana: tornado warnings361461%4781%16 min
NWS Northern Indiana: severe thunderstorm warnings1216844%44050%17 min
NWS Northern Indiana: flash flood warnings20100%30%

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 8, 3:56 AM ESTWinter Weather AdvisoryIWX30 hr
Jan 10, 2:31 PM ESTWinter Storm WatchIWX24 hr
Jan 11, 2:28 PM ESTWinter Storm WarningIWX53 hr
Jan 13, 4:23 AM ESTWind Chill AdvisoryIWX56 hr
Jan 13, 7:10 PM ESTWinter Weather AdvisoryIWX4 days
Jan 14, 9:00 PM ESTWind Chill WarningIWX15 hr
Jan 15, 11:56 AM ESTWind Chill AdvisoryIWX47 hr
Jan 18, 5:03 AM ESTWinter Storm WarningIWX62 hr
Jan 18, 5:03 AM ESTWinter Weather AdvisoryIWX31 hr
Jan 19, 12:58 PM ESTWinter Weather AdvisoryIWX31 hr
Jan 21, 3:03 PM ESTWinter Weather AdvisoryIWX44 hr
Jan 22, 10:17 AM ESTMesoscale DiscussionSPC4 hr
Jan 23, 2:13 PM ESTDense Fog AdvisoryIWX56 hr
Jan 26, 2:00 PM ESTDense Fog AdvisoryIWX23 hr
Feb 8, 10:26 PM ESTSpecial Weather StatementIWX49 min
Feb 8, 11:08 PM ESTSpecial Weather StatementIWX52 min
Feb 27, 9:28 PM ESTMesoscale DiscussionSPC62 min
Feb 27, 9:45 PM ESTSevere Thunderstorm WatchSPC6 hr
Feb 27, 9:50 PM ESTSpecial Weather StatementIWX40 min
Feb 27, 9:55 PM ESTSevere Thunderstorm WarningIWX50 min
Mar 26, 2:07 PM EDTSevere Thunderstorm WarningIWX8 min
Mar 26, 2:15 PM EDTSevere Thunderstorm WarningIWX15 min
Apr 11, 2:30 PM EDTWind AdvisoryIWX30 hr
Apr 17, 10:40 AM EDTMesoscale DiscussionSPC65 min
Apr 17, 11:44 AM EDTSpecial Weather StatementIWX46 min
Apr 21, 2:50 PM EDTFrost AdvisoryIWX17 hr
Apr 23, 3:31 PM EDTFreeze WatchIWX23 hr
Apr 23, 8:29 PM EDTSpecial Weather StatementIWX16 min
Apr 23, 10:19 PM EDTSpecial Weather StatementIWX11 min
Apr 24, 2:28 PM EDTFreeze WarningIWX19 hr
Apr 25, 3:14 PM EDTFrost AdvisoryIWX18 hr
May 7, 1:14 PM EDTMesoscale DiscussionSPC2 hr
May 7, 2:28 PM EDTTornado WatchSPC12 hr
May 7, 3:53 PM EDTMesoscale DiscussionSPC67 min
May 7, 4:55 PM EDTSpecial Weather StatementIWX35 min
May 7, 4:59 PM EDTTornado WarningIWX46 min
May 7, 5:14 PM EDTSevere Thunderstorm WarningIWX31 min
May 20, 4:21 PM EDTMesoscale DiscussionSPC114 min
May 20, 6:05 PM EDTSpecial Weather StatementIWX55 min
May 26, 10:58 PM EDTSpecial Weather StatementGRR47 min
Jun 13, 2:02 PM EDTMesoscale DiscussionSPC118 min
Jun 13, 2:50 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 13, 5:38 PM EDTSevere Thunderstorm WarningIWX22 min
Jun 13, 5:46 PM EDTMesoscale DiscussionSPC89 min
Jun 16, 3:47 AM EDTExcessive Heat WatchIWX25 hr
Jun 16, 9:17 PM EDTSpecial Weather StatementIWX43 min
Jun 16, 9:57 PM EDTSevere Thunderstorm WarningIWX33 min
Jun 16, 10:31 PM EDTSpecial Weather StatementIWX29 min
Jun 16, 11:01 PM EDTSpecial Weather StatementIWX29 min
Jun 16, 11:08 PM EDTMesoscale DiscussionSPC67 min
Jun 17, 12:29 AM EDTSevere Thunderstorm WarningIWX31 min
Jun 17, 4:24 AM EDTHeat AdvisoryIWX6 days
Jun 23, 12:01 AM EDTSpecial Weather StatementIWX44 min
Jun 25, 5:37 AM EDTMesoscale DiscussionSPC113 min
Jun 25, 6:00 AM EDTSevere Thunderstorm WatchSPC6 hr
Jun 25, 7:28 AM EDTMesoscale DiscussionSPC92 min
Jun 25, 7:29 AM EDTSpecial Weather StatementIWX76 min
Jun 25, 7:50 AM EDTSevere Thunderstorm WarningIWX40 min
Jun 25, 8:34 AM EDTSpecial Weather StatementIWX56 min
Jun 25, 8:51 AM EDTAreal Flood AdvisoryIWX114 min
Jun 25, 9:01 AM EDTSevere Thunderstorm WarningIWX29 min
Jun 25, 9:30 AM EDTAreal Flood AdvisoryIWX2 hr
Jul 8, 3:59 PM EDTSpecial Weather StatementIWX46 min
Jul 9, 3:21 AM EDTFlood WatchIWX32 hr
Jul 9, 1:28 PM EDTSpecial Weather StatementIWX62 min
Jul 9, 7:41 PM EDTAreal Flood WarningIWX12 hr
Jul 10, 2:07 AM EDTAreal Flood WarningIWX5 hr
Jul 10, 9:21 AM EDTRiver Flood WarningIWX71 hr
Jul 10, 11:03 AM EDTAreal Flood AdvisoryIWX117 min
Jul 11, 6:07 AM EDTDense Fog AdvisoryIWX3 hr
Jul 11, 9:38 AM EDTRiver Flood WarningIWX13 hr
Jul 14, 10:08 AM EDTMesoscale DiscussionSPC2 hr
Jul 14, 3:50 PM EDTFlood WatchIWX34 hr
Jul 14, 10:36 PM EDTMesoscale DiscussionSPC54 min
Jul 14, 11:50 PM EDTSevere Thunderstorm WatchSPC4 hr
Jul 15, 1:54 AM EDTMesoscale DiscussionSPC2 hr
Jul 15, 7:53 PM EDTTornado WatchSPC6 hr
Jul 15, 10:59 PM EDTSevere Thunderstorm Warning Considerable damage threatIWX46 min
Jul 15, 11:35 PM EDTTornado WarningIWX55 min
Jul 15, 11:56 PM EDTSevere Thunderstorm WarningIWX38 min
Jul 16, 12:27 AM EDTSevere Thunderstorm WarningIWX14 min
Aug 6, 7:31 AM EDTMesoscale DiscussionSPC119 min
Aug 6, 7:51 AM EDTSevere Thunderstorm WarningIWX39 min
Aug 6, 7:59 AM EDTTornado WarningIWX31 min
Aug 6, 8:04 AM EDTTornado WatchSPC9 hr
Aug 6, 8:19 AM EDTTornado WarningIWX41 min
Aug 16, 8:17 PM EDTSpecial Weather StatementGRR58 min
Aug 25, 3:05 PM EDTExcessive Heat WatchIWX23 hr
Aug 26, 2:29 PM EDTExcessive Heat WarningIWX32 hr
Aug 27, 4:23 PM EDTSpecial Weather StatementIWX37 min
Aug 27, 8:15 PM EDTSevere Thunderstorm WatchSPC4 hr
Aug 27, 9:21 PM EDTSevere Thunderstorm Warning Considerable damage threatIWX39 min
Aug 27, 9:29 PM EDTMesoscale DiscussionSPC91 min
Aug 30, 5:02 PM EDTSpecial Weather StatementIWX28 min
Aug 30, 5:14 PM EDTSevere Thunderstorm WarningIWX31 min
Sep 20, 11:27 PM EDTDense Fog AdvisoryIWX11 hr
Sep 24, 2:10 PM EDTMesoscale DiscussionSPC2 hr
Sep 24, 5:53 PM EDTTornado WarningIWX37 min
Sep 24, 6:24 PM EDTSevere Thunderstorm WarningIWX36 min
Sep 24, 6:42 PM EDTTornado WarningIWX33 min
Oct 1, 5:00 AM EDTDense Fog AdvisoryIWX3 hr
Oct 12, 4:52 PM EDTMesoscale DiscussionSPC83 min
Oct 16, 12:23 PM EDTFreeze WarningIWX21 hr
Nov 18, 5:28 AM ESTDense Fog AdvisoryIWX5 hr
Dec 1, 2:52 AM ESTWinter Storm WatchIWX24 hr
Dec 2, 3:17 AM ESTWinter Storm WarningIWX31 hr
Dec 3, 2:33 PM ESTWinter Storm WatchIWX13 hr
Dec 4, 3:06 AM ESTWinter Storm WarningIWX46 hr
Dec 4, 7:55 PM ESTSpecial Weather StatementIWX80 min
Dec 10, 2:27 PM ESTWinter Weather AdvisoryIWX47 hr
Dec 22, 2:17 PM ESTWinter Weather AdvisoryIWX24 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 archive20232025

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.