Alert archive / Michigan / Delta County

Weather alerts in Delta County, Michigan, 2023

67 weather alerts in 2023, 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 2023. Tap one for its archive.

Alerts
67
Warnings
17
Watches
7
Advisories
23
Busiest month
July16 alerts
Busiest day
July 10, 20235 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, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings9456%10%
Flash flood warnings00

Each office's whole area, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Marquette, MI: severe thunderstorm warnings341653%5463%22 min
NWS Marquette, MI: flash flood warnings10100%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 2, 2:22 PM ESTWinter Weather AdvisoryMQT59 hr
Jan 17, 3:33 PM ESTWinter Storm WatchMQT24 hr
Jan 18, 3:58 PM ESTWinter Storm WarningMQT30 hr
Jan 19, 7:48 AM ESTMesoscale DiscussionSPC5 hr
Feb 19, 3:09 PM ESTWinter Weather AdvisoryMQT43 hr
Feb 21, 2:50 PM ESTWinter Storm WatchMQT25 hr
Feb 22, 4:14 AM ESTWinter Storm WarningMQT45 hr
Feb 23, 6:06 AM ESTMesoscale DiscussionSPC6 hr
Feb 26, 3:24 PM ESTWinter Weather AdvisoryMQT34 hr
Mar 5, 4:19 AM ESTWinter Weather AdvisoryMQT45 hr
Mar 15, 3:50 AM EDTWinter Storm WatchMQT49 hr
Mar 17, 4:42 AM EDTWinter Weather AdvisoryMQT39 hr
Mar 25, 9:54 AM EDTMesoscale DiscussionSPC4 hr
Mar 25, 11:10 AM EDTWinter Weather AdvisoryMQT9 hr
Mar 30, 4:54 AM EDTWinter Storm WatchMQT32 hr
Mar 30, 4:54 AM EDTWinter Weather AdvisoryMQT30 hr
Mar 30, 11:04 PM EDTMesoscale DiscussionSPC26 min
Mar 31, 1:12 PM EDTWinter Storm WarningMQT23 hr
Apr 3, 3:27 PM EDTWinter Weather AdvisoryMQT41 hr
Apr 3, 4:03 PM EDTLakeshore Flood AdvisoryMQT3 days
Apr 5, 12:11 AM EDTSpecial Weather StatementMQT34 min
Apr 12, 10:30 AM EDTRiver Flood AdvisoryMQT4 days
Apr 13, 10:52 AM EDTAreal Flood AdvisoryMQT24 hr
Apr 14, 1:00 PM EDTAreal Flood AdvisoryMQT19 hr
Apr 15, 10:01 AM EDTRiver Flood WarningMQT4 days
Apr 19, 2:11 PM EDTRiver Flood AdvisoryMQT44 hr
Apr 21, 1:33 PM EDTRiver Flood AdvisoryMQT21 days
Apr 30, 3:20 PM EDTWinter Weather AdvisoryMQT41 hr
May 2, 2:56 PM EDTAreal Flood AdvisoryMQT6 hr
May 2, 9:14 PM EDTRiver Flood AdvisoryMQT8 hr
May 3, 5:42 AM EDTRiver Flood WarningMQT54 hr
May 5, 3:58 PM EDTRiver Flood AdvisoryMQT21 days
May 17, 4:01 PM EDTFire Weather WatchMQT13 hr
May 18, 5:05 AM EDTRed Flag WarningMQT15 hr
Jun 6, 4:07 PM EDTRed Flag WarningMQT28 hr
Jun 7, 8:29 PM EDTRed Flag WarningMQT24 hr
Jul 8, 2:26 PM EDTSpecial Weather StatementMQT34 min
Jul 8, 2:46 PM EDTSevere Thunderstorm WarningMQT29 min
Jul 8, 3:16 PM EDTSpecial Weather StatementMQT29 min
Jul 8, 3:41 PM EDTSpecial Weather StatementMQT34 min
Jul 10, 4:42 PM EDTMesoscale DiscussionSPC2 hr
Jul 10, 6:22 PM EDTSevere Thunderstorm WarningMQT53 min
Jul 10, 6:43 PM EDTSevere Thunderstorm WarningMQT62 min
Jul 10, 6:55 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 10, 7:28 PM EDTSevere Thunderstorm WarningMQT62 min
Jul 10, 8:14 PM EDTSevere Thunderstorm Warning Destructive damage threatMQT46 min
Jul 14, 5:52 PM EDTSpecial Weather StatementMQT23 min
Jul 15, 11:15 PM EDTSpecial Weather StatementMQT30 min
Jul 22, 4:10 PM EDTSevere Thunderstorm WarningMQT35 min
Jul 22, 5:17 PM EDTSpecial Weather StatementMQT28 min
Jul 27, 5:51 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 27, 10:30 PM EDTMesoscale DiscussionSPC90 min
Aug 2, 3:30 PM EDTSpecial Weather StatementMQT45 min
Aug 2, 3:57 PM EDTSevere Thunderstorm WarningMQT33 min
Aug 2, 4:29 PM EDTSpecial Weather StatementMQT31 min
Aug 16, 11:02 AM EDTLakeshore Flood AdvisoryMQT25 hr
Aug 17, 1:50 AM EDTSpecial Weather StatementMQT25 min
Aug 25, 2:32 PM EDTMesoscale DiscussionSPC118 min
Aug 25, 4:16 PM EDTSevere Thunderstorm WarningMQT44 min
Aug 25, 4:26 PM EDTSpecial Weather StatementMQT49 min
Aug 25, 4:54 PM EDTSevere Thunderstorm WarningMQT31 min
Aug 25, 5:17 PM EDTSpecial Weather StatementMQT43 min
Sep 6, 9:04 AM EDTSpecial Weather StatementMQT26 min
Nov 16, 4:04 AM ESTLakeshore Flood AdvisoryMQT24 hr
Dec 22, 3:12 PM ESTDense Fog AdvisoryMQT20 hr
Dec 23, 3:49 PM ESTDense Fog AdvisoryMQT20 hr
Dec 26, 5:47 PM ESTDense Fog AdvisoryMQT8 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.