Alert archive / Michigan / Kent County

Weather alerts in Kent County, Michigan, 2010

169 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Kent County and its neighbors

Each county as a circle sized by its count in 2010. Tap one for its archive.

Alerts
169
Warnings
45
Watches
26
Advisories
43
Busiest month
June38 alerts
Busiest day
May 31, 20108 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 4 tornado warnings covering Kent County in 2010 had a tornado report inside them.

Kent County, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings40100%0
Severe thunderstorm warnings201335%3868%18 min
Flash flood warnings110%6100%62 min

Each office's whole area, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Grand Rapids, MI: tornado warnings31487%850%20 min
NWS Grand Rapids, MI: severe thunderstorm warnings914748%18670%26 min
NWS Grand Rapids, MI: flash flood warnings8538%1878%61 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 5, 8:14 PM ESTFreezing Rain AdvisoryGRR7 hr
Jan 6, 3:41 PM ESTWinter Weather AdvisoryGRR36 hr
Feb 7, 3:37 PM ESTWinter Storm WatchGRR24 hr
Feb 8, 4:05 PM ESTWinter Storm WarningGRR42 hr
Feb 17, 3:12 AM ESTWinter Weather AdvisoryGRR8 hr
Feb 20, 3:21 PM ESTWinter Storm WatchGRR24 hr
Feb 21, 3:50 PM ESTWinter Storm WarningGRR21 hr
Feb 24, 9:01 AM ESTLake Effect Snow AdvisoryGRR14 hr
Feb 26, 2:50 PM ESTWinter Weather AdvisoryGRR14 hr
Mar 11, 2:47 PM ESTAreal Flood AdvisoryGRR44 hr
Mar 11, 10:03 PM ESTRiver Flood AdvisoryGRR8 days
Mar 12, 6:23 AM ESTRiver Flood AdvisoryGRR4 days
Mar 12, 6:23 AM ESTRiver Flood AdvisoryGRR37 hr
Mar 12, 10:12 PM ESTRiver Flood AdvisoryGRR6 days
Mar 14, 9:52 AM EDTRiver Flood AdvisoryGRR60 hr
Mar 15, 9:26 PM EDTRiver Flood WarningGRR50 hr
Mar 17, 10:53 PM EDTRiver Flood AdvisoryGRR46 hr
Mar 31, 3:37 PM EDTFire Weather WatchGRR36 hr
Apr 2, 3:38 AM EDTRed Flag WarningGRR16 hr
Apr 4, 8:50 PM EDTSpecial Weather StatementGRR55 min
Apr 6, 9:26 AM EDTSevere Thunderstorm WatchSPC4 hr
Apr 6, 9:33 AM EDTSpecial Weather StatementGRR57 min
Apr 6, 9:45 AM EDTSevere Thunderstorm WarningGRR45 min
Apr 6, 10:27 AM EDTSevere Thunderstorm WarningGRR48 min
Apr 6, 11:27 AM EDTMesoscale DiscussionSPC63 min
Apr 6, 1:59 PM EDTRiver Flood AdvisoryGRR6 days
Apr 6, 10:50 PM EDTRiver Flood AdvisoryGRR23 hr
Apr 6, 10:50 PM EDTRiver Flood AdvisoryGRR72 hr
Apr 6, 10:50 PM EDTRiver Flood AdvisoryGRR36 hr
Apr 15, 4:47 AM EDTRed Flag WarningGRR15 hr
Apr 16, 3:35 PM EDTFreeze WatchGRR24 hr
Apr 17, 3:15 PM EDTFreeze WarningGRR19 hr
Apr 18, 2:09 PM EDTFreeze WarningGRR18 hr
Apr 19, 1:51 PM EDTFreeze WarningGRR18 hr
Apr 21, 3:41 PM EDTFreeze WarningGRR17 hr
Apr 22, 3:11 PM EDTFreeze WarningGRR18 hr
Apr 27, 3:18 AM EDTFreeze WatchGRR11 hr
Apr 27, 2:07 PM EDTFreeze WarningGRR18 hr
Apr 28, 3:47 PM EDTFrost AdvisoryGRR16 hr
Apr 30, 10:29 PM EDTMesoscale DiscussionSPC61 min
May 8, 3:36 PM EDTFreeze WarningGRR16 hr
May 9, 10:53 AM EDTFreeze WarningGRR21 hr
May 12, 3:58 PM EDTFlood WatchGRR28 hr
May 13, 8:28 AM EDTSpecial Weather StatementGRR62 min
May 13, 9:36 AM EDTSpecial Weather StatementGRR54 min
May 14, 11:13 AM EDTRiver Flood AdvisoryGRR69 hr
May 14, 11:13 AM EDTRiver Flood AdvisoryGRR48 hr
May 23, 3:50 AM EDTDense Fog AdvisoryGRR4 hr
May 26, 6:36 PM EDTAreal Flood AdvisoryGRR3 hr
May 26, 6:36 PM EDTSpecial Weather StatementGRR54 min
May 31, 6:12 AM EDTSpecial Weather StatementGRR63 min
May 31, 6:41 AM EDTSevere Thunderstorm WarningGRR64 min
May 31, 7:13 AM EDTSevere Thunderstorm WarningGRR12 min
May 31, 7:49 AM EDTSpecial Weather StatementGRR56 min
May 31, 2:04 PM EDTSevere Thunderstorm WarningGRR41 min
May 31, 2:31 PM EDTAreal Flood AdvisoryGRR3 hr
May 31, 3:30 PM EDTRiver Flood WarningGRR5 hr
May 31, 4:00 PM EDTFlash Flood WarningGRR5 hr
Jun 2, 3:58 AM EDTSpecial Weather StatementGRR62 min
Jun 2, 4:51 AM EDTSpecial Weather StatementGRR54 min
Jun 2, 5:10 AM EDTAreal Flood AdvisoryGRR18 hr
Jun 2, 5:51 AM EDTSpecial Weather StatementGRR54 min
Jun 5, 9:55 PM EDTAreal Flood AdvisoryGRR12 hr
Jun 6, 4:30 AM EDTRiver Flood AdvisoryGRR18 hr
Jun 11, 11:46 AM EDTSpecial Weather StatementGRR44 min
Jun 15, 10:41 PM EDTAreal Flood AdvisoryGRR71 min
Jun 15, 11:20 PM EDTSpecial Weather StatementGRR85 min
Jun 15, 11:46 PM EDTAreal Flood WarningGRR12 hr
Jun 16, 11:46 AM EDTAreal Flood WarningGRR10 hr
Jun 18, 4:32 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 18, 5:51 PM EDTFlash Flood WatchGRR10 hr
Jun 18, 6:06 PM EDTMesoscale DiscussionSPC54 min
Jun 18, 7:06 PM EDTSpecial Weather StatementGRR54 min
Jun 18, 7:39 PM EDTSevere Thunderstorm WarningGRR66 min
Jun 18, 7:56 PM EDTMesoscale DiscussionSPC94 min
Jun 21, 11:44 PM EDTMesoscale DiscussionSPC61 min
Jun 22, 12:09 AM EDTSevere Thunderstorm WatchSPC5 hr
Jun 22, 12:24 AM EDTSevere Thunderstorm WarningGRR66 min
Jun 22, 12:58 AM EDTAreal Flood AdvisoryGRR10 hr
Jun 22, 12:59 AM EDTTornado WarningGRR31 min
Jun 22, 1:12 AM EDTSevere Thunderstorm WarningGRR48 min
Jun 22, 1:20 AM EDTTornado WarningGRR25 min
Jun 22, 1:35 AM EDTSevere Thunderstorm WarningGRR40 min
Jun 23, 7:06 AM EDTSpecial Weather StatementGRR54 min
Jun 23, 7:21 AM EDTSevere Thunderstorm WarningGRR54 min
Jun 23, 7:26 AM EDTMesoscale DiscussionSPC64 min
Jun 23, 7:30 AM EDTFlash Flood WatchGRR16 hr
Jun 23, 7:40 AM EDTSevere Thunderstorm WatchSPC7 hr
Jun 23, 8:15 AM EDTSpecial Weather StatementGRR75 min
Jun 27, 5:03 AM EDTSpecial Weather StatementGRR57 min
Jun 27, 6:43 AM EDTSpecial Weather StatementGRR62 min
Jun 27, 7:30 AM EDTSevere Thunderstorm WarningGRR45 min
Jun 27, 8:16 AM EDTSpecial Weather StatementGRR59 min
Jun 27, 2:11 PM EDTSpecial Weather StatementGRR49 min
Jun 27, 2:35 PM EDTAreal Flood AdvisoryGRR6 hr
Jun 27, 2:43 PM EDTMesoscale DiscussionSPC2 hr
Jul 7, 11:27 AM EDTHeat AdvisoryGRR8 hr
Jul 11, 12:14 PM EDTSpecial Weather StatementGRR61 min
Jul 14, 10:25 PM EDTMesoscale DiscussionSPC95 min
Jul 15, 4:52 AM EDTMesoscale DiscussionSPC83 min
Jul 15, 1:01 PM EDTMesoscale DiscussionSPC59 min
Jul 15, 1:30 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 18, 12:52 PM EDTMesoscale DiscussionSPC113 min
Jul 18, 1:47 PM EDTSevere Thunderstorm WatchSPC10 hr
Jul 18, 2:50 PM EDTSpecial Weather StatementGRR55 min
Jul 18, 3:27 PM EDTSpecial Weather StatementGRR63 min
Jul 18, 3:49 PM EDTSevere Thunderstorm WarningGRR41 min
Jul 18, 4:14 PM EDTSevere Thunderstorm WarningGRR46 min
Jul 18, 4:48 PM EDTMesoscale DiscussionSPC87 min
Jul 18, 5:09 PM EDTSpecial Weather StatementGRR51 min
Jul 22, 2:30 PM EDTMesoscale DiscussionSPC90 min
Jul 22, 4:05 PM EDTFlash Flood WatchGRR12 hr
Jul 22, 6:29 PM EDTMesoscale DiscussionSPC61 min
Jul 22, 7:33 PM EDTTornado WatchSPC5 hr
Jul 22, 9:56 PM EDTAreal Flood AdvisoryGRR14 hr
Jul 23, 12:35 AM EDTTornado WatchSPC3 hr
Jul 23, 4:42 AM EDTHeat AdvisoryGRR15 hr
Jul 23, 12:38 PM EDTFlash Flood WatchGRR10 hr
Jul 23, 10:31 PM EDTFlash Flood WatchGRR17 hr
Jul 28, 12:44 PM EDTMesoscale DiscussionSPC91 min
Aug 8, 8:18 AM EDTSpecial Weather StatementGRR57 min
Aug 9, 7:25 AM EDTSpecial Weather StatementGRR35 min
Aug 10, 3:26 AM EDTDense Fog AdvisoryGRR6 hr
Aug 11, 9:30 AM EDTSpecial Weather StatementGRR60 min
Aug 20, 6:41 PM EDTSevere Thunderstorm WatchSPC4 hr
Sep 3, 12:17 AM EDTSevere Thunderstorm WarningGRR28 min
Sep 3, 12:25 AM EDTSevere Thunderstorm WarningGRR35 min
Sep 3, 12:41 AM EDTSevere Thunderstorm WarningGRR34 min
Sep 6, 3:43 PM EDTWind AdvisoryGRR36 hr
Sep 16, 1:45 PM EDTAreal Flood AdvisoryGRR2 hr
Sep 18, 12:55 PM EDTSpecial Weather StatementGRR65 min
Sep 21, 7:05 PM EDTMesoscale DiscussionSPC55 min
Sep 21, 7:32 PM EDTSevere Thunderstorm WarningGRR58 min
Sep 21, 8:08 PM EDTSevere Thunderstorm WatchSPC4 hr
Sep 21, 8:17 PM EDTSevere Thunderstorm WarningGRR58 min
Sep 21, 8:33 PM EDTSevere Thunderstorm WarningGRR57 min
Sep 21, 9:03 PM EDTSevere Thunderstorm WarningGRR72 min
Sep 21, 9:19 PM EDTAreal Flood AdvisoryGRR4 hr
Sep 23, 4:14 PM EDTWind AdvisoryGRR28 hr
Oct 3, 3:07 PM EDTFrost AdvisoryGRR18 hr
Oct 4, 3:20 PM EDTFrost AdvisoryGRR18 hr
Oct 8, 3:37 AM EDTRed Flag WarningGRR16 hr
Oct 13, 9:44 AM EDTSpecial Weather StatementGRR61 min
Oct 15, 3:47 PM EDTFrost AdvisoryGRR17 hr
Oct 18, 4:02 PM EDTFrost AdvisoryGRR17 hr
Oct 21, 2:59 PM EDTFreeze WarningGRR18 hr
Oct 24, 4:12 PM EDTHigh Wind WatchGRR23 hr
Oct 24, 7:03 PM EDTSpecial Weather StatementGRR57 min
Oct 24, 7:50 PM EDTSpecial Weather StatementGRR55 min
Oct 24, 7:51 PM EDTSpecial Weather StatementGRR54 min
Oct 24, 9:57 PM EDTSpecial Weather StatementGRR63 min
Oct 24, 10:15 PM EDTSpecial Weather StatementGRR60 min
Oct 24, 10:51 PM EDTAreal Flood AdvisoryGRR6 hr
Oct 24, 11:02 PM EDTSpecial Weather StatementGRR58 min
Oct 25, 3:37 PM EDTHigh Wind WarningGRR58 hr
Oct 26, 4:28 AM EDTTornado WatchSPC8 hr
Oct 26, 7:00 AM EDTMesoscale DiscussionSPC2 hr
Oct 26, 10:45 AM EDTTornado WarningGRR45 min
Oct 26, 11:04 AM EDTTornado WatchSPC4 hr
Oct 26, 11:34 AM EDTTornado WarningGRR28 min
Oct 27, 7:38 PM EDTWind AdvisoryGRR6 hr
Nov 17, 12:38 PM ESTSpecial Weather StatementGRR52 min
Nov 22, 10:58 AM ESTSpecial Weather StatementGRR62 min
Nov 22, 4:49 PM ESTMesoscale DiscussionSPC86 min
Nov 22, 6:13 PM ESTTornado WatchSPC4 hr
Nov 22, 7:13 PM ESTSpecial Weather StatementGRR62 min
Dec 1, 10:20 AM ESTLake Effect Snow AdvisoryGRR12 hr
Dec 10, 4:20 PM ESTWinter Storm WatchGRR24 hr
Dec 11, 4:04 PM ESTWinter Storm WarningGRR50 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 archive20092011

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.