Alert archive / Michigan / Oakland County

Weather alerts in Oakland County, Michigan, 2015

122 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Oakland County and its neighbors

Each county as a circle sized by its count in 2015. Tap one for its archive.

Alerts
122
Warnings
14
Watches
16
Advisories
30
Busiest month
May22 alerts
Busiest day
June 23, 20156 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 1 tornado warnings covering Oakland County in 2015 had a tornado report inside them.

Oakland County, 2015

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings5420%1292%11 min
Flash flood warnings10100%0

Each office's whole area, 2015

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Detroit, MI: tornado warnings10370%757%15 min
NWS Detroit, MI: severe thunderstorm warnings695028%17770%25 min
NWS Detroit, MI: flash flood warnings50100%0

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 2, 4:10 PM ESTWinter Weather AdvisoryDTX27 hr
Jan 4, 3:03 PM ESTWind Chill AdvisoryDTX21 hr
Jan 6, 3:15 PM ESTWind Chill AdvisoryDTX49 hr
Jan 8, 3:57 AM ESTWinter Weather AdvisoryDTX21 hr
Jan 9, 3:39 PM ESTWind Chill AdvisoryDTX20 hr
Jan 30, 1:57 PM ESTWinter Storm WatchDTX26 hr
Jan 31, 4:00 PM ESTWinter Storm WarningDTX38 hr
Feb 1, 2:35 PM ESTMesoscale DiscussionSPC6 hr
Feb 3, 2:50 PM ESTWinter Weather AdvisoryDTX13 hr
Feb 11, 10:00 PM ESTWind Chill AdvisoryDTX35 hr
Feb 13, 2:49 PM ESTWind Chill WatchDTX12 hr
Feb 14, 3:17 AM ESTWind Chill WarningDTX33 hr
Feb 15, 11:59 AM ESTWind Chill AdvisoryDTX20 hr
Feb 18, 11:25 AM ESTWind Chill WarningDTX26 hr
Feb 18, 11:25 AM ESTWind Chill AdvisoryDTX47 hr
Feb 22, 3:57 AM ESTWind Chill AdvisoryDTX32 hr
Mar 2, 3:40 PM ESTWinter Weather AdvisoryDTX27 hr
Mar 14, 12:30 AM EDTDense Fog AdvisoryDTX9 hr
Apr 3, 2:59 AM EDTDense Fog AdvisoryDTX6 hr
Apr 9, 4:00 PM EDTWind AdvisoryDTX23 hr
Apr 9, 7:11 PM EDTTornado WatchSPC98 min
Apr 10, 12:56 AM EDTMesoscale DiscussionSPC94 min
Apr 10, 2:54 AM EDTMesoscale DiscussionSPC66 min
Apr 20, 1:07 PM EDTSpecial Weather StatementDTX53 min
Apr 21, 11:18 AM EDTWind AdvisoryDTX9 hr
May 8, 5:54 PM EDTSpecial Weather StatementDTX66 min
May 8, 8:53 PM EDTSpecial Weather StatementDTX67 min
May 10, 3:25 PM EDTSpecial Weather StatementDTX35 min
May 10, 4:04 PM EDTSpecial Weather StatementDTX26 min
May 10, 8:37 PM EDTSpecial Weather StatementDTX53 min
May 11, 12:48 PM EDTMesoscale DiscussionSPC2 hr
May 11, 1:14 PM EDTTornado WatchSPC7 hr
May 11, 4:39 PM EDTMesoscale DiscussionSPC66 min
May 13, 3:47 PM EDTFrost AdvisoryDTX16 hr
May 22, 3:39 PM EDTFrost AdvisoryDTX16 hr
May 25, 2:00 PM EDTSpecial Weather StatementDTX60 min
May 26, 3:01 PM EDTSevere Thunderstorm WatchSPC6 hr
May 26, 4:41 PM EDTMesoscale DiscussionSPC2 hr
May 26, 4:53 PM EDTMesoscale DiscussionSPC2 hr
May 26, 6:31 PM EDTSpecial Weather StatementDTX29 min
May 27, 12:09 PM EDTMesoscale DiscussionSPC96 min
May 27, 1:08 PM EDTSevere Thunderstorm WatchSPC6 hr
May 27, 2:40 PM EDTSevere Thunderstorm WarningDTX65 min
May 27, 3:26 PM EDTMesoscale DiscussionSPC2 hr
May 30, 10:38 AM EDTFlood WatchDTX29 hr
May 30, 11:23 AM EDTSpecial Weather StatementDTX22 min
May 30, 5:34 PM EDTAreal Flood AdvisoryDTX3 hr
Jun 7, 6:35 PM EDTSpecial Weather StatementDTX55 min
Jun 7, 9:09 PM EDTSpecial Weather StatementDTX51 min
Jun 7, 10:05 PM EDTSpecial Weather StatementDTX55 min
Jun 8, 2:06 PM EDTMesoscale DiscussionSPC114 min
Jun 10, 2:46 AM EDTSpecial Weather StatementDTX59 min
Jun 10, 4:31 AM EDTSpecial Weather StatementDTX59 min
Jun 11, 8:55 PM EDTSevere Thunderstorm WarningDTX24 min
Jun 14, 2:28 PM EDTFlash Flood WarningDTX3 hr
Jun 15, 10:44 AM EDTFlash Flood WatchDTX12 hr
Jun 18, 3:28 PM EDTMesoscale DiscussionSPC2 hr
Jun 22, 1:23 PM EDTSevere Thunderstorm WatchSPC4 hr
Jun 22, 2:12 PM EDTSpecial Weather StatementDTX48 min
Jun 22, 3:43 PM EDTSpecial Weather StatementDTX62 min
Jun 22, 4:28 PM EDTSpecial Weather StatementDTX47 min
Jun 22, 8:31 PM EDTMesoscale DiscussionSPC59 min
Jun 22, 9:17 PM EDTTornado WatchSPC6 hr
Jun 22, 11:00 PM EDTMesoscale DiscussionSPC60 min
Jun 22, 11:49 PM EDTSpecial Weather StatementDTX26 min
Jun 23, 12:20 AM EDTSpecial Weather StatementDTX25 min
Jun 23, 1:34 AM EDTSpecial Weather StatementDTX26 min
Jun 27, 10:57 AM EDTAreal Flood AdvisoryDTX12 hr
Jul 14, 3:05 AM EDTSpecial Weather StatementDTX55 min
Jul 17, 3:29 PM EDTHeat AdvisoryDTX22 hr
Jul 18, 12:12 PM EDTSpecial Weather StatementDTX48 min
Jul 25, 3:21 PM EDTMesoscale DiscussionSPC114 min
Jul 29, 2:28 PM EDTMesoscale DiscussionSPC3 hr
Jul 29, 2:52 PM EDTSpecial Weather StatementDTX38 min
Jul 29, 3:37 PM EDTSpecial Weather StatementDTX53 min
Aug 2, 2:56 PM EDTMesoscale DiscussionSPC64 min
Aug 2, 6:27 PM EDTSevere Thunderstorm WatchSPC6 hr
Aug 2, 8:12 PM EDTSpecial Weather StatementDTX63 min
Aug 2, 9:02 PM EDTMesoscale DiscussionSPC118 min
Aug 2, 11:05 PM EDTSevere Thunderstorm WarningDTX63 min
Aug 14, 7:12 PM EDTSevere Thunderstorm WarningDTX35 min
Aug 19, 2:34 PM EDTMesoscale DiscussionSPC116 min
Aug 23, 1:12 PM EDTMesoscale DiscussionSPC93 min
Aug 23, 5:29 PM EDTSpecial Weather StatementDTX31 min
Aug 23, 5:45 PM EDTTornado WarningDTX21 min
Aug 23, 6:07 PM EDTMesoscale DiscussionSPC113 min
Aug 30, 11:13 PM EDTDense Fog AdvisoryDTX10 hr
Sep 2, 6:03 PM EDTSpecial Weather StatementDTX42 min
Sep 2, 6:44 PM EDTSpecial Weather StatementDTX46 min
Sep 3, 1:00 PM EDTSpecial Weather StatementDTX30 min
Sep 3, 1:29 PM EDTSevere Thunderstorm WarningDTX61 min
Sep 3, 4:37 PM EDTFlash Flood WatchDTX9 hr
Sep 7, 4:54 PM EDTSpecial Weather StatementDTX51 min
Sep 8, 3:59 PM EDTMesoscale DiscussionSPC91 min
Sep 19, 10:47 AM EDTSpecial Weather StatementDTX58 min
Oct 15, 3:41 PM EDTFreeze WatchDTX23 hr
Oct 16, 3:03 PM EDTFreeze WarningDTX18 hr
Oct 17, 2:20 PM EDTFreeze WarningDTX19 hr
Oct 24, 3:09 PM EDTMesoscale DiscussionSPC3 hr
Oct 24, 6:10 PM EDTSpecial Weather StatementDTX65 min
Nov 6, 6:22 AM ESTSpecial Weather StatementDTX53 min
Nov 6, 6:57 AM ESTSpecial Weather StatementDTX63 min
Nov 11, 4:54 AM ESTHigh Wind WatchDTX11 hr
Nov 11, 3:38 PM ESTHigh Wind WarningDTX23 hr
Nov 11, 3:38 PM ESTWind AdvisoryDTX28 hr
Nov 20, 4:03 AM ESTWinter Storm WatchDTX11 hr
Nov 20, 3:25 PM ESTWinter Weather AdvisoryDTX31 hr
Nov 21, 9:02 AM ESTWinter Storm WarningDTX13 hr
Nov 21, 9:36 AM ESTMesoscale DiscussionSPC5 hr
Dec 5, 3:07 AM ESTDense Fog AdvisoryDTX9 hr
Dec 5, 7:55 PM ESTDense Fog AdvisoryDTX14 hr
Dec 6, 8:20 PM ESTDense Fog AdvisoryDTX15 hr
Dec 7, 4:43 PM ESTDense Fog AdvisoryDTX13 hr
Dec 12, 8:07 PM ESTDense Fog AdvisoryDTX14 hr
Dec 14, 9:47 AM ESTSpecial Weather StatementDTX58 min
Dec 14, 12:31 PM ESTSpecial Weather StatementDTX89 min
Dec 14, 5:32 PM ESTSpecial Weather StatementDTX58 min
Dec 23, 3:23 PM ESTWind AdvisoryDTX17 hr
Dec 23, 6:20 PM ESTSpecial Weather StatementDTX85 min
Dec 27, 3:30 AM ESTWinter Storm WatchDTX23 hr
Dec 28, 2:39 AM ESTWinter Weather AdvisoryDTX22 hr
Dec 28, 12:04 PM ESTMesoscale DiscussionSPC6 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 archive20142016

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.