Alert archive / Michigan / Clinton County

Weather alerts in Clinton County, Michigan, 2009

119 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Clinton County and its neighbors

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts
119
Warnings
17
Watches
17
Advisories
45
Busiest month
April25 alerts
Busiest day
April 25, 200912 alerts

Over time

By month

Warning verification

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

Clinton County, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings5260%0
Flash flood warnings110%1100%150 min

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Grand Rapids, MI: tornado warnings20100%30%
NWS Grand Rapids, MI: severe thunderstorm warnings402245%8562%24 min
NWS Grand Rapids, MI: flash flood warnings330%2588%109 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, 3:24 PM ESTFreezing Rain AdvisoryGRR22 hr
Jan 4, 6:56 AM ESTMesoscale DiscussionSPC3 hr
Jan 10, 4:16 AM ESTWinter Weather AdvisoryGRR14 hr
Jan 12, 2:32 PM ESTWinter Weather AdvisoryGRR20 hr
Jan 14, 4:23 AM ESTWind Chill AdvisoryGRR3 days
Jan 17, 3:37 AM ESTWinter Weather AdvisoryGRR43 hr
Feb 3, 3:59 PM ESTWind Chill AdvisoryGRR20 hr
Feb 10, 3:39 AM ESTHigh Wind WatchGRR12 hr
Feb 10, 12:04 PM ESTFlood WatchGRR24 hr
Feb 10, 3:38 PM ESTWind AdvisoryGRR37 hr
Feb 10, 9:30 PM ESTRiver Flood WarningGRR39 hr
Feb 11, 6:39 AM ESTDense Fog AdvisoryGRR5 hr
Feb 11, 11:56 AM ESTAreal Flood WarningGRR23 hr
Feb 11, 11:58 AM ESTRiver Flood WarningGRR5 days
Feb 12, 12:27 PM ESTRiver Flood AdvisoryGRR24 hr
Feb 19, 3:53 PM ESTWinter Storm WatchGRR24 hr
Feb 20, 3:43 PM ESTWinter Storm WarningGRR27 hr
Feb 21, 6:35 AM ESTMesoscale DiscussionSPC5 hr
Feb 26, 8:38 PM ESTAreal Flood AdvisoryGRR102 days
Feb 27, 11:16 AM ESTRiver Flood AdvisoryGRR29 hr
Feb 27, 11:16 AM ESTRiver Flood AdvisoryGRR58 hr
Mar 6, 3:12 PM ESTFlood WatchGRR51 hr
Mar 9, 10:30 PM EDTRiver Flood AdvisoryGRR6 days
Mar 10, 4:09 AM EDTWind AdvisoryGRR36 hr
Mar 11, 10:14 PM EDTRiver Flood WarningGRR23 hr
Apr 4, 10:33 PM EDTWinter Storm WatchGRR17 hr
Apr 5, 3:32 PM EDTWinter Weather AdvisoryGRR19 hr
Apr 6, 2:04 AM EDTMesoscale DiscussionSPC4 hr
Apr 25, 10:23 AM EDTMesoscale DiscussionSPC2 hr
Apr 25, 10:44 AM EDTSevere Thunderstorm WatchSPC5 hr
Apr 25, 11:42 AM EDTSpecial Weather StatementGRR48 min
Apr 25, 11:55 AM EDTMesoscale DiscussionSPC95 min
Apr 25, 1:06 PM EDTMesoscale DiscussionSPC84 min
Apr 25, 2:55 PM EDTMesoscale DiscussionSPC95 min
Apr 25, 3:36 PM EDTSpecial Weather StatementGRR54 min
Apr 25, 3:39 PM EDTSevere Thunderstorm WatchSPC6 hr
Apr 25, 5:00 PM EDTSevere Thunderstorm WarningGRR60 min
Apr 25, 5:43 PM EDTSpecial Weather StatementGRR62 min
Apr 25, 6:12 PM EDTSevere Thunderstorm WarningGRR21 min
Apr 25, 7:15 PM EDTMesoscale DiscussionSPC60 min
Apr 25, 11:04 PM EDTRiver Flood AdvisoryGRR49 hr
Apr 25, 11:04 PM EDTRiver Flood AdvisoryGRR49 hr
Apr 26, 2:02 AM EDTAreal Flood AdvisoryGRR88 days
Apr 26, 2:09 PM EDTAreal Flood AdvisoryGRR87 days
Apr 27, 3:18 AM EDTWind AdvisoryGRR14 hr
Apr 27, 4:04 PM EDTFlood WatchGRR19 hr
Apr 28, 12:25 AM EDTRiver Flood WarningGRR22 hr
Apr 28, 12:25 AM EDTRiver Flood WarningGRR7 days
Apr 28, 8:59 AM EDTAreal Flood AdvisoryGRR103 days
Apr 30, 12:17 PM EDTRiver Flood AdvisoryGRR34 hr
May 10, 3:47 AM EDTFrost AdvisoryGRR28 hr
May 11, 12:44 PM EDTFrost AdvisoryGRR19 hr
May 13, 9:58 PM EDTRiver Flood AdvisoryGRR24 hr
May 13, 11:18 PM EDTAreal Flood AdvisoryGRR87 days
May 13, 11:54 PM EDTSpecial Weather StatementGRR66 min
May 14, 1:23 AM EDTSpecial Weather StatementGRR97 min
May 15, 11:05 AM EDTRiver Flood AdvisoryGRR31 hr
May 15, 11:05 AM EDTRiver Flood AdvisoryGRR24 hr
May 15, 3:40 PM EDTFlood WatchGRR12 hr
May 17, 2:58 PM EDTFreeze WarningGRR17 hr
May 27, 2:58 PM EDTSpecial Weather StatementGRR62 min
May 30, 12:28 PM EDTMesoscale DiscussionSPC2 hr
Jun 8, 3:19 PM EDTSevere Thunderstorm WarningGRR56 min
Jun 8, 3:34 PM EDTMesoscale DiscussionSPC56 min
Jun 8, 4:02 PM EDTTornado WatchSPC6 hr
Jun 8, 6:46 PM EDTMesoscale DiscussionSPC59 min
Jun 19, 4:29 AM EDTFlash Flood WatchGRR20 hr
Jun 19, 5:44 AM EDTSpecial Weather StatementGRR46 min
Jun 19, 1:06 PM EDTSpecial Weather StatementGRR114 min
Jun 19, 7:04 PM EDTMesoscale DiscussionSPC86 min
Jun 19, 8:30 PM EDTSpecial Weather StatementGRR60 min
Jun 19, 9:15 PM EDTFlash Flood WarningGRR5 hr
Jun 19, 11:12 PM EDTRiver Flood AdvisoryGRR4 days
Jun 20, 2:23 AM EDTAreal Flood WarningGRR57 hr
Jun 21, 4:54 PM EDTRiver Flood AdvisoryGRR17 hr
Jun 25, 1:30 PM EDTMesoscale DiscussionSPC60 min
Jun 25, 2:08 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 25, 4:12 PM EDTMesoscale DiscussionSPC63 min
Jul 11, 3:31 AM EDTMesoscale DiscussionSPC29 min
Jul 22, 1:57 PM EDTSpecial Weather StatementGRR48 min
Jul 23, 5:23 PM EDTSpecial Weather StatementGRR52 min
Aug 9, 1:10 AM EDTSpecial Weather StatementGRR65 min
Aug 9, 5:18 PM EDTMesoscale DiscussionSPC57 min
Aug 9, 5:48 PM EDTSevere Thunderstorm WatchSPC4 hr
Aug 9, 7:10 PM EDTSevere Thunderstorm WarningGRR65 min
Aug 9, 7:40 PM EDTSevere Thunderstorm WarningGRR65 min
Aug 10, 12:42 AM EDTMesoscale DiscussionSPC3 hr
Aug 10, 1:37 AM EDTAreal Flood AdvisoryGRR7 hr
Aug 10, 1:58 AM EDTSpecial Weather StatementGRR92 min
Aug 10, 3:51 AM EDTSpecial Weather StatementGRR84 min
Aug 19, 9:18 PM EDTMesoscale DiscussionSPC57 min
Aug 27, 3:54 PM EDTFlood WatchGRR18 hr
Sep 22, 2:54 AM EDTDense Fog AdvisoryGRR7 hr
Sep 27, 3:00 PM EDTWind AdvisoryGRR31 hr
Sep 27, 10:14 PM EDTMesoscale DiscussionSPC2 hr
Sep 27, 10:46 PM EDTSevere Thunderstorm WatchSPC4 hr
Sep 27, 11:44 PM EDTSpecial Weather StatementGRR61 min
Sep 30, 3:56 AM EDTFrost AdvisoryGRR17 hr
Sep 30, 3:56 AM EDTFreeze WarningGRR29 hr
Oct 6, 4:23 PM EDTSpecial Weather StatementGRR67 min
Oct 6, 9:12 PM EDTSpecial Weather StatementGRR93 min
Oct 10, 2:41 AM EDTDense Fog AdvisoryGRR6 hr
Oct 10, 2:41 AM EDTFreeze WarningGRR29 hr
Oct 30, 3:46 PM EDTWind AdvisoryGRR12 hr
Oct 30, 7:19 PM EDTSpecial Weather StatementGRR116 min
Oct 30, 9:17 PM EDTSpecial Weather StatementGRR73 min
Oct 30, 10:55 PM EDTRiver Flood AdvisoryGRR12 hr
Nov 8, 12:25 AM ESTDense Fog AdvisoryGRR9 hr
Nov 21, 9:34 PM ESTDense Fog AdvisoryGRR12 hr
Dec 3, 2:40 PM ESTWinter Weather AdvisoryGRR25 hr
Dec 7, 4:00 AM ESTWinter Storm WatchGRR49 hr
Dec 8, 4:44 AM ESTWinter Weather AdvisoryGRR23 hr
Dec 9, 12:09 AM ESTMesoscale DiscussionSPC6 hr
Dec 9, 4:30 AM ESTWinter Weather AdvisoryGRR48 hr
Dec 12, 8:04 PM ESTWinter Weather AdvisoryGRR15 hr
Dec 22, 4:14 PM ESTWinter Storm WatchGRR36 hr
Dec 24, 3:45 AM ESTWinter Weather AdvisoryGRR33 hr
Dec 24, 7:28 PM ESTMesoscale DiscussionSPC4 hr
Dec 26, 12:54 AM ESTWinter Weather AdvisoryGRR10 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 archive20082010

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.