Alert archive / Michigan / Ottawa County

Weather alerts in Ottawa County, Michigan, 2026

113 weather alerts in 2026, 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 2026. Tap one for its archive.

Alerts
113
Warnings
25
Watches
18
Advisories
27
Busiest month
June21 alerts
Busiest day
March 11, 20268 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 2 tornado warnings covering Ottawa County in 2026 had a tornado report inside them.

Ottawa County, 2026

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings20100%0
Severe thunderstorm warnings12833%22100%32 min
Flash flood warnings2150%0

Each office's whole area, 2026

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Grand Rapids, MI: tornado warnings23387%875%7 min
NWS Grand Rapids, MI: severe thunderstorm warnings1316153%23386%31 min
NWS Grand Rapids, MI: flash flood warnings3167%825%28 min

An office's figures cover every county it serves, including across state lines.

The year is still running; reports filed late and damage surveys can still change these figures.

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 9, 2:08 AM ESTWind AdvisoryGRR14 hr
Jan 15, 12:48 PM ESTWinter Weather AdvisoryGRR66 hr
Jan 17, 3:00 PM ESTWinter Storm WatchGRR13 hr
Jan 18, 3:51 AM ESTWinter Storm WarningGRR51 hr
Jan 20, 2:26 PM ESTWinter Storm WarningGRR21 hr
Jan 21, 2:28 PM ESTWinter Weather AdvisoryGRR65 hr
Jan 21, 3:30 PM ESTExtreme Cold WatchGRR11 hr
Jan 22, 2:43 AM ESTCold Weather AdvisoryGRR56 hr
Jan 22, 3:36 PM ESTExtreme Cold WarningGRR43 hr
Jan 25, 3:08 PM ESTWinter Weather AdvisoryGRR23 hr
Jan 26, 1:48 PM ESTWinter Weather AdvisoryGRR68 hr
Jan 29, 2:42 PM ESTCold Weather AdvisoryGRR19 hr
Feb 2, 9:58 AM ESTWinter Weather AdvisoryGRR9 hr
Feb 5, 10:34 AM ESTWinter Weather AdvisoryGRR24 hr
Feb 19, 1:14 PM ESTWind AdvisoryGRR30 hr
Mar 5, 8:56 AM ESTDense Fog AdvisoryGRR3 hr
Mar 6, 8:29 AM ESTDense Fog AdvisoryGRR5 hr
Mar 10, 1:59 PM EDTFlood WatchGRR21 hr
Mar 10, 6:40 PM EDTSevere Thunderstorm WatchSPC7 hr
Mar 10, 8:02 PM EDTSevere Thunderstorm WarningGRR43 min
Mar 10, 8:18 PM EDTSevere Thunderstorm WarningGRR42 min
Mar 10, 8:21 PM EDTMesoscale DiscussionSPC84 min
Mar 10, 8:43 PM EDTAreal Flood AdvisoryGRR45 min
Mar 10, 8:56 PM EDTSevere Thunderstorm WarningGRR64 min
Mar 10, 9:28 PM EDTFlash Flood WarningGRR4 hr
Mar 10, 10:09 PM EDTFlash Flood WarningGRR3 hr
Mar 10, 10:15 PM EDTSevere Thunderstorm WarningGRR42 min
Mar 12, 2:45 AM EDTHigh Wind WatchGRR10 hr
Mar 12, 12:54 PM EDTHigh Wind WarningGRR34 hr
Mar 14, 1:22 PM EDTWind AdvisoryGRR57 hr
Mar 15, 1:41 PM EDTWinter Weather AdvisoryGRR45 hr
Mar 30, 11:49 PM EDTMesoscale DiscussionSPC2 hr
Apr 4, 8:51 AM EDTRiver Flood WatchGRR8 days
Apr 6, 3:56 PM EDTRiver Flood WarningGRR7 days
Apr 12, 1:40 PM EDTFlood WatchGRR4 days
Apr 13, 8:25 PM EDTMesoscale DiscussionSPC2 hr
Apr 14, 2:50 AM EDTMesoscale DiscussionSPC85 min
Apr 14, 3:43 AM EDTSevere Thunderstorm WarningGRR45 min
Apr 14, 8:31 PM EDTMesoscale DiscussionSPC59 min
Apr 14, 8:54 PM EDTTornado WatchSPC6 hr
Apr 14, 9:17 PM EDTSevere Thunderstorm WarningGRR88 min
Apr 14, 10:01 PM EDTTornado WarningGRR29 min
Apr 15, 11:01 PM EDTSpecial Weather StatementGRR89 min
Apr 17, 2:12 AM EDTDense Fog AdvisoryGRR9 hr
Apr 17, 11:33 AM EDTRiver Flood WarningGRR21 days
Apr 18, 12:01 AM EDTSpecial Weather StatementGRR44 min
Apr 18, 2:10 PM EDTFrost AdvisoryGRR17 hr
Apr 18, 2:10 PM EDTFreeze WatchGRR12 hr
Apr 19, 1:45 AM EDTFreeze WarningGRR32 hr
Apr 27, 1:44 PM EDTWind AdvisoryGRR6 hr
Apr 27, 10:35 PM EDTSpecial Weather StatementGRR55 min
Apr 30, 12:45 PM EDTFreeze WatchGRR23 hr
May 1, 12:01 PM EDTFreeze WarningGRR21 hr
May 6, 1:57 PM EDTFrost AdvisoryGRR18 hr
May 10, 1:10 PM EDTFrost AdvisoryGRR19 hr
May 11, 1:34 PM EDTFrost AdvisoryGRR18 hr
May 12, 10:53 PM EDTSpecial Weather StatementGRR82 min
May 16, 3:43 AM EDTSpecial Weather StatementGRR92 min
May 16, 4:24 AM EDTSevere Thunderstorm WarningGRR24 min
May 17, 3:32 PM EDTMesoscale DiscussionSPC2 hr
May 18, 12:59 PM EDTSevere Thunderstorm WatchSPC5 hr
May 18, 1:58 PM EDTSevere Thunderstorm WarningGRR79 min
May 20, 4:18 AM EDTBeach Hazards StatementGRR22 hr
May 24, 9:53 PM EDTDense Fog AdvisoryGRR12 hr
May 27, 2:24 PM EDTBeach Hazards StatementGRR11 hr
Jun 4, 3:25 PM EDTBeach Hazards StatementGRR24 hr
Jun 10, 3:07 AM EDTDense Fog AdvisoryGRR7 hr
Jun 10, 4:58 PM EDTMesoscale DiscussionSPC2 hr
Jun 10, 5:41 PM EDTSevere Thunderstorm WatchSPC4 hr
Jun 10, 6:02 PM EDTSevere Thunderstorm WarningGRR58 min
Jun 11, 4:18 AM EDTBeach Hazards StatementGRR32 hr
Jun 11, 8:08 PM EDTTornado WatchSPC6 hr
Jun 11, 8:11 PM EDTSevere Thunderstorm Warning Considerable damage threatGRR94 min
Jun 11, 8:42 PM EDTTornado WarningGRR38 min
Jun 12, 4:10 PM EDTBeach Hazards StatementGRR34 hr
Jun 14, 1:05 AM EDTSpecial Weather StatementGRR85 min
Jun 14, 4:28 AM EDTBeach Hazards StatementGRR16 hr
Jun 15, 11:19 AM EDTBeach Hazards StatementGRR9 hr
Jun 15, 9:17 PM EDTBeach Hazards StatementGRR29 hr
Jun 16, 4:07 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 17, 2:15 PM EDTBeach Hazards StatementGRR28 hr
Jun 22, 2:03 AM EDTBeach Hazards StatementGRR22 hr
Jun 24, 4:04 AM EDTBeach Hazards StatementGRR17 hr
Jun 28, 2:31 AM EDTExtreme Heat WatchGRR11 hr
Jun 28, 1:26 PM EDTExtreme Heat WarningGRR4 days
Jun 28, 2:22 PM EDTBeach Hazards StatementGRR54 hr
Jul 2, 11:36 AM EDTHeat AdvisoryGRR31 hr
Jul 3, 2:20 PM EDTMesoscale DiscussionSPC55 min
Jul 3, 2:35 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 3, 3:15 PM EDTSevere Thunderstorm Warning Considerable damage threatGRR90 min
Jul 6, 3:53 AM EDTBeach Hazards StatementGRR18 hr
Jul 13, 10:35 AM EDTHeat AdvisoryGRR57 hr
Jul 17, 2:00 PM EDTBeach Hazards StatementGRR38 hr
Jul 20, 2:39 AM EDTBeach Hazards StatementGRR67 hr
Jul 27, 3:50 AM EDTBeach Hazards StatementGRR46 hr
Jul 27, 10:40 AM EDTMesoscale DiscussionSPC3 hr
Jul 27, 12:42 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 1, 7:09 PM EDTBeach Hazards StatementGRR31 hr
Aug 9, 1:03 PM EDTSevere Thunderstorm WatchSPC8 hr
Aug 9, 2:37 PM EDTSevere Thunderstorm WarningGRR83 min
Aug 13, 6:25 AM EDTDense Fog AdvisoryGRR4 hr
Aug 21, 2:20 PM EDTBeach Hazards StatementGRR55 hr
Aug 25, 1:25 PM EDTBeach Hazards StatementGRR32 hr
Aug 26, 8:42 AM EDTSpecial Weather StatementGRR63 min
Aug 29, 1:30 PM EDTBeach Hazards StatementGRR33 hr
Aug 31, 2:36 AM EDTBeach Hazards StatementGRR20 hr
Sep 2, 2:17 AM EDTHeat AdvisoryGRR18 hr
Sep 3, 8:52 AM EDTMesoscale DiscussionSPC83 min
Sep 4, 4:40 AM EDTMesoscale DiscussionSPC2 hr
Sep 4, 5:52 AM EDTSpecial Weather StatementGRR83 min
Sep 8, 3:14 AM EDTBeach Hazards StatementGRR41 hr
Sep 12, 1:59 PM EDTBeach Hazards StatementGRR33 hr
Sep 14, 2:49 AM EDTBeach Hazards StatementGRR44 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 archive2025

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.