Alert archive / Michigan / Delta County

Weather alerts in Delta County, Michigan, 2025

67 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Delta County and its neighbors

Each county as a circle sized by its count in 2025. Tap one for its archive.

Alerts
67
Warnings
12
Watches
6
Advisories
23
Busiest month
March13 alerts
Busiest day
May 16, 20254 alerts

Over time

By month

Warning verification

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

Delta County, 2025

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings5340%1100%8 min
Flash flood warnings00

Each office's whole area, 2025

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Marquette, MI: severe thunderstorm warnings491471%3367%23 min
NWS Marquette, MI: flash flood warnings330%1663%173 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 11, 3:06 PM ESTWinter Weather AdvisoryMQT3 days
Jan 17, 2:51 PM ESTCold Weather AdvisoryMQT4 days
Jan 19, 4:26 AM ESTExtreme Cold WarningMQT57 hr
Jan 21, 4:22 AM ESTCold Weather AdvisoryMQT21 hr
Jan 27, 3:01 PM ESTWinter Weather AdvisoryMQT52 hr
Jan 28, 7:33 AM ESTMesoscale DiscussionSPC4 hr
Feb 14, 2:09 AM ESTWinter Weather AdvisoryMQT4 days
Feb 17, 2:47 PM ESTCold Weather AdvisoryMQT19 hr
Feb 23, 3:26 PM ESTWinter Weather AdvisoryMQT16 hr
Feb 27, 2:41 PM ESTWind AdvisoryMQT34 hr
Feb 27, 2:41 PM ESTWinter Weather AdvisoryMQT34 hr
Mar 3, 2:44 PM ESTWinter Weather AdvisoryMQT19 hr
Mar 4, 3:38 AM ESTWinter Weather AdvisoryMQT48 hr
Mar 14, 3:16 PM EDTWind AdvisoryMQT21 hr
Mar 17, 3:25 PM EDTWinter Storm WatchMQT24 hr
Mar 18, 3:24 PM EDTWinter Storm WarningMQT38 hr
Mar 18, 3:24 PM EDTWinter Weather AdvisoryMQT12 hr
Mar 22, 4:03 AM EDTWinter Weather AdvisoryMQT58 hr
Mar 27, 3:44 AM EDTWinter Storm WatchMQT24 hr
Mar 27, 3:09 PM EDTIce Storm WarningMQT69 hr
Mar 27, 3:09 PM EDTWinter Storm WarningMQT4 days
Mar 28, 8:41 PM EDTSpecial Weather StatementMQT34 min
Mar 29, 5:09 PM EDTMesoscale DiscussionSPC4 hr
Mar 30, 3:07 PM EDTMesoscale DiscussionSPC5 hr
Apr 1, 3:04 AM EDTWinter Weather AdvisoryMQT41 hr
Apr 28, 12:32 PM EDTSpecial Weather StatementMQT43 min
Apr 28, 10:52 PM EDTSpecial Weather StatementMQT38 min
Apr 28, 11:35 PM EDTMesoscale DiscussionSPC85 min
May 15, 7:07 PM EDTMesoscale DiscussionSPC83 min
May 15, 10:02 PM EDTSpecial Weather StatementMQT43 min
May 15, 10:45 PM EDTSpecial Weather StatementMQT45 min
May 16, 3:30 PM EDTMesoscale DiscussionSPC2 hr
May 16, 5:13 PM EDTSevere Thunderstorm WarningMQT42 min
May 16, 8:04 PM EDTSpecial Weather StatementMQT41 min
May 24, 2:57 PM EDTFrost AdvisoryMQT18 hr
May 31, 2:11 PM EDTFrost AdvisoryMQT19 hr
Jun 3, 2:32 PM EDTMesoscale DiscussionSPC118 min
Jun 21, 5:09 AM EDTSevere Thunderstorm WarningMQT14 min
Jun 21, 9:27 AM EDTSevere Thunderstorm WarningMQT19 min
Jun 21, 9:54 AM EDTSevere Thunderstorm WarningMQT35 min
Jun 23, 2:15 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 29, 6:36 AM EDTSpecial Weather StatementMQT39 min
Jun 30, 8:40 PM EDTSpecial Weather StatementMQT50 min
Jul 2, 4:28 PM EDTMesoscale DiscussionSPC92 min
Jul 5, 5:28 PM EDTSpecial Weather StatementMQT47 min
Jul 8, 3:57 PM EDTMesoscale DiscussionSPC93 min
Jul 8, 4:54 PM EDTSpecial Weather StatementMQT51 min
Jul 23, 7:32 PM EDTMesoscale DiscussionSPC58 min
Jul 27, 3:32 PM EDTSevere Thunderstorm WarningMQT45 min
Aug 12, 5:51 PM EDTMesoscale DiscussionSPC114 min
Aug 16, 2:18 PM EDTSpecial Weather StatementMQT27 min
Sep 17, 8:43 AM EDTSpecial Weather StatementMQT62 min
Sep 17, 3:18 PM EDTSpecial Weather StatementMQT42 min
Sep 17, 3:59 PM EDTSpecial Weather StatementMQT46 min
Sep 22, 12:17 AM EDTDense Fog AdvisoryMQT9 hr
Oct 6, 1:26 PM EDTFreeze WatchMQT14 hr
Oct 7, 3:06 AM EDTFreeze WarningMQT31 hr
Nov 7, 2:40 PM ESTWinter Weather AdvisoryMQT3 days
Nov 24, 1:48 AM ESTWinter Storm WatchMQT36 hr
Nov 25, 2:33 AM ESTWinter Storm WarningMQT64 hr
Nov 28, 2:37 PM ESTWinter Weather AdvisoryMQT46 hr
Dec 17, 3:00 PM ESTWinter Weather AdvisoryMQT46 hr
Dec 25, 2:33 AM ESTWinter Weather AdvisoryMQT35 hr
Dec 26, 2:41 PM ESTWinter Storm WatchMQT24 hr
Dec 27, 3:01 PM ESTBlizzard WarningMQT46 hr
Dec 29, 4:32 AM ESTMesoscale DiscussionSPC6 hr
Dec 29, 12:46 PM ESTWinter Weather AdvisoryMQT12 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 archive20242026

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.