Alert archive / Michigan / Muskegon County

Weather alerts in Muskegon County, Michigan, 2021

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

Muskegon County and its neighbors

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

Alerts
105
Warnings
12
Watches
12
Advisories
33
Busiest month
August18 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.

Muskegon County, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings5340%683%28 min
Flash flood warnings00

Each office's whole area, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Grand Rapids, MI: tornado warnings140100%80%
NWS Grand Rapids, MI: severe thunderstorm warnings1005446%20975%23 min
NWS Grand Rapids, MI: flash flood warnings10100%20%

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 AdvisoryGRR24 hr
Jan 20, 4:15 AM ESTLakeshore Flood AdvisoryGRR25 hr
Jan 24, 2:21 PM ESTWinter Weather AdvisoryGRR49 hr
Feb 3, 3:38 PM ESTWinter Weather AdvisoryGRR4 days
Feb 4, 11:59 AM ESTWinter Storm WarningGRR27 hr
Feb 8, 3:49 AM ESTWinter Weather AdvisoryGRR32 hr
Feb 19, 3:39 AM ESTWinter Weather AdvisoryGRR29 hr
Feb 21, 12:10 PM ESTWinter Weather AdvisoryGRR21 hr
Mar 10, 3:37 AM ESTWind AdvisoryGRR38 hr
Mar 15, 11:22 AM EDTWinter Weather AdvisoryGRR21 hr
Mar 18, 3:23 AM EDTWind AdvisoryGRR17 hr
Apr 5, 6:27 AM EDTSpecial Weather StatementGRR108 min
Apr 19, 3:42 AM EDTFreeze WatchGRR12 hr
Apr 19, 3:30 PM EDTFreeze WarningGRR66 hr
Apr 29, 6:46 PM EDTSpecial Weather StatementGRR119 min
May 1, 3:00 AM EDTWind AdvisoryGRR17 hr
May 1, 8:44 PM EDTSpecial Weather StatementGRR2 hr
May 1, 10:11 PM EDTSpecial Weather StatementGRR64 min
May 7, 5:58 AM EDTDense Fog AdvisoryGRR3 hr
May 7, 3:51 PM EDTFrost AdvisoryGRR17 hr
May 9, 3:46 PM EDTFrost AdvisoryGRR17 hr
May 10, 10:10 AM EDTFreeze WarningGRR22 hr
May 11, 11:13 AM EDTFreeze WarningGRR21 hr
May 12, 1:38 PM EDTFrost AdvisoryGRR18 hr
May 13, 12:00 PM EDTFrost AdvisoryGRR19 hr
May 29, 10:20 AM EDTFrost AdvisoryGRR22 hr
Jun 4, 12:56 PM EDTFire Weather WatchGRR22 hr
Jun 4, 3:39 PM EDTBeach Hazards StatementGRR30 hr
Jun 15, 3:57 AM EDTBeach Hazards StatementGRR18 hr
Jun 17, 9:12 AM EDTRed Flag WarningGRR11 hr
Jun 18, 4:44 AM EDTSpecial Weather StatementGRR4 hr
Jun 19, 10:59 AM EDTSpecial Weather StatementGRR61 min
Jun 20, 4:52 AM EDTBeach Hazards StatementGRR45 hr
Jun 22, 3:41 PM EDTBeach Hazards StatementGRR60 hr
Jun 25, 2:56 PM EDTFlood WatchGRR29 hr
Jun 26, 1:05 PM EDTTornado WatchSPC9 hr
Jun 26, 2:36 PM EDTAreal Flood AdvisoryGRR4 hr
Jun 26, 3:49 PM EDTBeach Hazards StatementGRR24 hr
Jun 30, 3:14 PM EDTBeach Hazards StatementGRR37 hr
Jul 4, 2:39 PM EDTBeach Hazards StatementGRR32 hr
Jul 7, 12:13 PM EDTSpecial Weather StatementGRR4 hr
Jul 14, 3:17 AM EDTBeach Hazards StatementGRR39 hr
Jul 14, 11:15 PM EDTSpecial Weather StatementGRR60 min
Jul 19, 4:00 PM EDTBeach Hazards StatementGRR35 hr
Jul 23, 3:06 AM EDTBeach Hazards StatementGRR41 hr
Jul 23, 5:06 AM EDTAreal Flood AdvisoryGRR5 hr
Jul 24, 3:16 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 28, 11:06 AM EDTBeach Hazards StatementGRR55 hr
Jul 31, 4:21 AM EDTBeach Hazards StatementGRR48 hr
Aug 5, 3:19 PM EDTBeach Hazards StatementGRR29 hr
Aug 6, 4:23 PM EDTMesoscale DiscussionSPC97 min
Aug 7, 11:37 PM EDTSpecial Weather StatementGRR83 min
Aug 8, 4:05 AM EDTBeach Hazards StatementGRR22 hr
Aug 10, 3:06 PM EDTBeach Hazards StatementGRR36 hr
Aug 10, 8:12 PM EDTMesoscale DiscussionSPC63 min
Aug 10, 8:38 PM EDTSevere Thunderstorm WatchSPC5 hr
Aug 10, 9:22 PM EDTSpecial Weather StatementGRR3 hr
Aug 10, 9:40 PM EDTSevere Thunderstorm WarningGRR73 min
Aug 11, 11:50 AM EDTSevere Thunderstorm WatchSPC4 hr
Aug 11, 7:32 PM EDTSevere Thunderstorm WarningGRR43 min
Aug 11, 7:45 PM EDTMesoscale DiscussionSPC90 min
Aug 21, 8:59 AM EDTBeach Hazards StatementGRR38 hr
Aug 24, 2:02 PM EDTMesoscale DiscussionSPC88 min
Aug 27, 3:22 PM EDTHeat AdvisoryGRR29 hr
Aug 28, 10:40 AM EDTBeach Hazards StatementGRR35 hr
Aug 29, 1:46 PM EDTSevere Thunderstorm WatchSPC6 hr
Aug 29, 3:18 PM EDTSevere Thunderstorm WarningGRR28 min
Sep 1, 11:39 AM EDTBeach Hazards StatementGRR15 hr
Sep 3, 3:56 PM EDTBeach Hazards StatementGRR64 hr
Sep 6, 3:50 PM EDTBeach Hazards StatementGRR64 hr
Sep 7, 11:47 AM EDTMesoscale DiscussionSPC58 min
Sep 7, 12:21 PM EDTSevere Thunderstorm WatchSPC6 hr
Sep 7, 1:49 PM EDTMesoscale DiscussionSPC86 min
Sep 7, 1:51 PM EDTSevere Thunderstorm WarningGRR54 min
Sep 7, 2:01 PM EDTLakeshore Flood AdvisoryGRR4 hr
Sep 10, 3:53 AM EDTBeach Hazards StatementGRR41 hr
Sep 12, 2:43 PM EDTMesoscale DiscussionSPC92 min
Sep 12, 4:44 PM EDTMesoscale DiscussionSPC91 min
Sep 12, 5:15 PM EDTSevere Thunderstorm WatchSPC3 hr
Sep 12, 6:22 PM EDTSpecial Weather StatementGRR53 min
Sep 12, 6:40 PM EDTSevere Thunderstorm WarningGRR35 min
Sep 13, 3:08 AM EDTBeach Hazards StatementGRR50 hr
Sep 13, 10:52 AM EDTMesoscale DiscussionSPC83 min
Sep 13, 10:56 AM EDTSpecial Weather StatementGRR64 min
Sep 19, 4:02 PM EDTBeach Hazards StatementGRR8 days
Oct 11, 1:37 PM EDTMesoscale DiscussionSPC113 min
Oct 11, 5:57 PM EDTMesoscale DiscussionSPC93 min
Oct 11, 9:20 PM EDTMesoscale DiscussionSPC115 min
Nov 13, 3:02 PM ESTWinter Weather AdvisoryGRR21 hr
Nov 21, 10:32 AM ESTWind AdvisoryGRR11 hr
Nov 27, 3:19 AM ESTWinter Weather AdvisoryGRR19 hr
Nov 29, 11:23 AM ESTWinter Weather AdvisoryGRR16 hr
Nov 29, 4:46 PM ESTMesoscale DiscussionSPC5 hr
Dec 5, 4:05 AM ESTWinter Weather AdvisoryGRR20 hr
Dec 6, 4:02 AM ESTWinter Weather AdvisoryGRR18 hr
Dec 7, 3:40 AM ESTWinter Weather AdvisoryGRR37 hr
Dec 9, 3:27 PM ESTHigh Wind WatchGRR24 hr
Dec 10, 2:58 PM ESTWind AdvisoryGRR28 hr
Dec 11, 6:32 AM ESTHigh Wind WarningGRR5 hr
Dec 11, 6:32 AM ESTWind AdvisoryGRR12 hr
Dec 14, 3:55 PM ESTHigh Wind WatchGRR11 hr
Dec 15, 2:58 AM ESTLakeshore Flood AdvisoryGRR31 hr
Dec 15, 3:02 AM ESTHigh Wind WarningGRR33 hr
Dec 15, 3:02 AM ESTWind AdvisoryGRR41 hr
Dec 26, 9:44 PM ESTWinter Weather AdvisoryGRR11 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.