Alert archive / Michigan / Ottawa County

Weather alerts in Ottawa County, Michigan, 2014

134 weather alerts in 2014, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Ottawa County and its neighbors

Each county as a circle sized by its count in 2014. Tap one for its archive.

Alerts
134
Warnings
20
Watches
11
Advisories
47
Busiest month
January19 alerts
Busiest day
June 18, 201410 alerts

Over time

By month

Warning verification

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

Ottawa County, 2014

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings10730%875%7 min
Flash flood warnings110%1100%352 min

Each office's whole area, 2014

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Grand Rapids, MI: tornado warnings10100%40%
NWS Grand Rapids, MI: severe thunderstorm warnings1166147%19865%21 min
NWS Grand Rapids, MI: flash flood warnings5340%7100%350 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 3, 12:50 PM ESTWind Chill WatchGRR39 hr
Jan 4, 3:36 AM ESTWinter Storm WarningGRR4 days
Jan 4, 3:36 AM ESTWinter Weather AdvisoryGRR4 days
Jan 5, 3:40 AM ESTWind Chill WarningGRR60 hr
Jan 7, 3:57 PM ESTWinter Weather AdvisoryGRR11 hr
Jan 10, 9:41 AM ESTDense Fog AdvisoryGRR4 hr
Jan 13, 3:30 PM ESTWinter Weather AdvisoryGRR44 hr
Jan 15, 3:32 PM ESTWinter Weather AdvisoryGRR33 hr
Jan 22, 3:41 AM ESTWinter Weather AdvisoryGRR31 hr
Jan 22, 5:59 PM ESTWinter Storm WarningGRR16 hr
Jan 23, 4:05 AM ESTWind Chill AdvisoryGRR11 hr
Jan 23, 4:05 AM ESTWinter Storm WatchGRR11 hr
Jan 23, 2:54 PM ESTWinter Storm WarningGRR48 hr
Jan 23, 2:54 PM ESTWinter Weather AdvisoryGRR6 days
Jan 26, 3:53 PM ESTWind Chill WatchGRR11 hr
Jan 27, 2:51 AM ESTWind Chill WarningGRR55 hr
Jan 29, 4:01 PM ESTWinter Weather AdvisoryGRR36 hr
Jan 30, 3:10 PM ESTWinter Storm WatchGRR25 hr
Jan 31, 3:51 PM ESTWinter Weather AdvisoryGRR29 hr
Feb 4, 3:30 AM ESTWinter Weather AdvisoryGRR33 hr
Feb 6, 3:24 PM ESTWind Chill AdvisoryGRR19 hr
Feb 16, 2:55 PM ESTWinter Weather AdvisoryGRR37 hr
Feb 17, 12:30 PM ESTMesoscale DiscussionSPC5 hr
Feb 17, 4:57 PM ESTMesoscale DiscussionSPC5 hr
Feb 19, 3:43 PM ESTWinter Weather AdvisoryGRR51 hr
Feb 24, 3:53 PM ESTWinter Weather AdvisoryGRR11 hr
Feb 26, 3:17 AM ESTWinter Weather AdvisoryGRR36 hr
Feb 26, 3:45 PM ESTWinter Storm WarningGRR23 hr
Feb 27, 3:07 PM ESTWind Chill AdvisoryGRR20 hr
Mar 1, 1:23 PM ESTWinter Weather AdvisoryGRR15 hr
Mar 2, 10:43 PM ESTWind Chill AdvisoryGRR11 hr
Mar 19, 5:39 PM EDTFlood WatchGRR41 hr
Apr 2, 3:00 AM EDTWinter Weather AdvisoryGRR49 hr
Apr 4, 3:44 AM EDTWind AdvisoryGRR18 hr
Apr 11, 3:59 PM EDTFlood WatchGRR64 hr
Apr 12, 5:06 PM EDTSevere Thunderstorm WarningGRR54 min
Apr 13, 5:38 AM EDTSpecial Weather StatementGRR67 min
Apr 13, 8:41 PM EDTSpecial Weather StatementGRR94 min
Apr 27, 3:34 PM EDTWind AdvisoryGRR28 hr
Apr 29, 12:47 PM EDTMesoscale DiscussionSPC88 min
Apr 29, 2:11 PM EDTSpecial Weather StatementGRR64 min
Apr 29, 2:40 PM EDTSevere Thunderstorm WarningGRR50 min
Apr 29, 3:00 PM EDTSpecial Weather StatementGRR60 min
May 7, 1:59 AM EDTSpecial Weather StatementGRR61 min
May 7, 3:04 AM EDTSpecial Weather StatementGRR56 min
May 7, 4:15 AM EDTSpecial Weather StatementGRR60 min
May 7, 5:57 AM EDTAreal Flood AdvisoryGRR6 hr
May 7, 6:15 AM EDTSpecial Weather StatementGRR60 min
May 7, 11:21 AM EDTMesoscale DiscussionSPC84 min
May 12, 6:29 AM EDTSpecial Weather StatementGRR91 min
May 12, 8:29 AM EDTSpecial Weather StatementGRR46 min
May 12, 11:46 AM EDTSpecial Weather StatementGRR59 min
May 12, 2:29 PM EDTMesoscale DiscussionSPC91 min
May 12, 2:30 PM EDTSpecial Weather StatementGRR3 hr
May 12, 2:41 PM EDTSevere Thunderstorm WatchSPC7 hr
May 12, 2:43 PM EDTSevere Thunderstorm WarningGRR62 min
May 12, 4:44 PM EDTMesoscale DiscussionSPC61 min
May 12, 7:05 PM EDTMesoscale DiscussionSPC55 min
May 15, 3:39 PM EDTFrost AdvisoryGRR16 hr
May 16, 2:50 PM EDTFrost AdvisoryGRR17 hr
May 21, 2:07 AM EDTSpecial Weather StatementGRR53 min
May 21, 2:56 AM EDTMesoscale DiscussionSPC94 min
Jun 17, 5:32 AM EDTSevere Thunderstorm WarningGRR43 min
Jun 17, 5:58 AM EDTMesoscale DiscussionSPC62 min
Jun 18, 1:59 AM EDTSpecial Weather StatementGRR61 min
Jun 18, 1:59 AM EDTMesoscale DiscussionSPC91 min
Jun 18, 2:42 AM EDTFlash Flood WatchGRR19 hr
Jun 18, 4:22 AM EDTSpecial Weather StatementGRR53 min
Jun 18, 5:36 AM EDTAreal Flood AdvisoryGRR6 hr
Jun 18, 7:33 AM EDTFlash Flood WarningGRR6 hr
Jun 18, 9:00 AM EDTSevere Thunderstorm WarningGRR45 min
Jun 18, 11:32 AM EDTMesoscale DiscussionSPC118 min
Jun 18, 12:01 PM EDTSpecial Weather StatementGRR3 hr
Jun 18, 12:34 PM EDTSevere Thunderstorm WarningGRR26 min
Jun 21, 11:41 PM EDTAreal Flood AdvisoryGRR4 hr
Jun 25, 7:43 PM EDTSevere Thunderstorm WarningGRR13 min
Jun 30, 2:41 AM EDTMesoscale DiscussionSPC64 min
Jun 30, 9:43 AM EDTBeach Hazards StatementGRR38 hr
Jun 30, 7:47 PM EDTMesoscale DiscussionSPC88 min
Jun 30, 8:23 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 2, 2:15 PM EDTBeach Hazards StatementGRR8 hr
Jul 5, 4:10 PM EDTBeach Hazards StatementGRR43 hr
Jul 6, 7:41 PM EDTSpecial Weather StatementGRR64 min
Jul 6, 9:09 PM EDTSevere Thunderstorm WarningGRR37 min
Jul 7, 12:11 AM EDTMesoscale DiscussionSPC64 min
Jul 12, 11:32 PM EDTMesoscale DiscussionSPC118 min
Jul 13, 12:06 AM EDTAreal Flood AdvisoryGRR10 hr
Jul 14, 3:27 AM EDTBeach Hazards StatementGRR41 hr
Jul 22, 12:07 PM EDTBeach Hazards StatementGRR39 hr
Jul 22, 10:01 PM EDTSpecial Weather StatementGRR89 min
Jul 22, 10:46 PM EDTAreal Flood AdvisoryGRR6 hr
Jul 22, 11:06 PM EDTSevere Thunderstorm WarningGRR84 min
Jul 27, 3:48 AM EDTBeach Hazards StatementGRR43 hr
Jul 27, 6:03 AM EDTDense Fog AdvisoryGRR3 hr
Jul 27, 1:39 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 27, 3:54 PM EDTSevere Thunderstorm WarningGRR51 min
Aug 11, 11:44 AM EDTBeach Hazards StatementGRR40 hr
Aug 19, 11:32 AM EDTSpecial Weather StatementGRR58 min
Aug 20, 3:07 AM EDTDense Fog AdvisoryGRR6 hr
Aug 25, 10:51 AM EDTSpecial Weather StatementGRR114 min
Aug 26, 1:38 PM EDTSpecial Weather StatementGRR82 min
Aug 29, 3:45 AM EDTBeach Hazards StatementGRR42 hr
Aug 30, 1:45 PM EDTMesoscale DiscussionSPC3 hr
Aug 31, 3:19 PM EDTBeach Hazards StatementGRR31 hr
Sep 4, 4:00 AM EDTBeach Hazards StatementGRR31 hr
Sep 4, 4:56 PM EDTSpecial Weather StatementGRR64 min
Sep 4, 11:28 PM EDTSpecial Weather StatementGRR62 min
Sep 5, 12:40 AM EDTSpecial Weather StatementGRR65 min
Sep 6, 4:26 AM EDTBeach Hazards StatementGRR11 hr
Sep 16, 3:11 AM EDTDense Fog AdvisoryGRR8 hr
Sep 20, 3:42 PM EDTSpecial Weather StatementGRR33 min
Sep 21, 1:41 AM EDTSpecial Weather StatementGRR94 min
Sep 21, 1:55 AM EDTMesoscale DiscussionSPC95 min
Sep 21, 2:31 AM EDTSpecial Weather StatementGRR59 min
Oct 3, 9:10 AM EDTWind AdvisoryGRR5 hr
Oct 3, 10:56 AM EDTAreal Flood AdvisoryGRR6 hr
Oct 9, 3:00 PM EDTFrost AdvisoryGRR17 hr
Oct 10, 1:46 PM EDTFreeze WarningGRR19 hr
Oct 11, 2:23 PM EDTFrost AdvisoryGRR19 hr
Oct 16, 5:22 AM EDTDense Fog AdvisoryGRR7 hr
Oct 18, 3:45 PM EDTFreeze WarningGRR17 hr
Oct 23, 5:35 AM EDTDense Fog AdvisoryGRR4 hr
Oct 30, 3:53 PM EDTWind AdvisoryGRR26 hr
Nov 12, 2:58 AM ESTWinter Weather AdvisoryGRR61 hr
Nov 14, 3:29 PM ESTWinter Weather AdvisoryGRR47 hr
Nov 16, 2:47 PM ESTWinter Storm WatchGRR12 hr
Nov 17, 3:16 AM ESTWinter Storm WarningGRR42 hr
Nov 18, 3:02 PM ESTWinter Weather AdvisoryGRR60 hr
Nov 21, 11:28 AM ESTFreezing Rain AdvisoryGRR24 hr
Nov 22, 2:07 AM ESTMesoscale DiscussionSPC5 hr
Nov 24, 2:55 AM ESTWinter Weather AdvisoryGRR32 hr
Nov 27, 11:58 AM ESTLake Effect Snow AdvisoryGRR9 hr
Nov 28, 9:03 PM ESTWinter Weather AdvisoryGRR6 hr
Dec 24, 3:11 AM ESTWinter Weather AdvisoryGRR21 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 archive20132015

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.