Alert archive / Michigan / Monroe County

Weather alerts in Monroe County, Michigan, 2010

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

Monroe County and its neighbors

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

Alerts
110
Warnings
32
Watches
28
Advisories
25
Busiest month
June29 alerts
Busiest day
July 23, 20107 alerts

Over time

By month

Warning verification

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

4 of 7 tornado warnings covering Monroe County in 2010 had a tornado report inside them; 3 of 4 tornado reports fell inside a warning, on average 13 minutes after it went out.

Monroe County, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings7443%475%13 min
Severe thunderstorm warnings13931%1060%46 min
Flash flood warnings00

Each office's whole area, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Detroit, MI: tornado warnings26869%1867%18 min
NWS Detroit, MI: severe thunderstorm warnings966334%23176%27 min
NWS Detroit, MI: flash flood warnings5340%1331%66 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 6, 9:36 PM ESTWinter Weather AdvisoryDTX33 hr
Feb 8, 4:15 AM ESTWinter Storm WatchDTX19 hr
Feb 8, 11:01 PM ESTWinter Storm WarningDTX35 hr
Feb 20, 3:55 PM ESTWinter Storm WatchDTX24 hr
Feb 21, 3:29 PM ESTWinter Weather AdvisoryDTX25 hr
Feb 26, 3:49 PM ESTWinter Weather AdvisoryDTX5 hr
Mar 31, 3:42 PM EDTFire Weather WatchDTX37 hr
Apr 2, 4:37 AM EDTRed Flag WarningDTX16 hr
Apr 6, 12:07 AM EDTSevere Thunderstorm WatchSPC5 hr
Apr 6, 11:27 AM EDTMesoscale DiscussionSPC63 min
Apr 14, 3:57 PM EDTFire Weather WatchDTX12 hr
Apr 15, 3:50 AM EDTRed Flag WarningDTX16 hr
Apr 17, 3:51 PM EDTFreeze WarningDTX16 hr
Apr 18, 3:49 PM EDTFreeze WarningDTX16 hr
Apr 19, 3:47 PM EDTFrost AdvisoryDTX16 hr
Apr 25, 3:55 PM EDTAreal Flood AdvisoryDTX4 hr
Apr 27, 4:04 AM EDTFreeze WarningDTX28 hr
Apr 28, 3:24 PM EDTFrost AdvisoryDTX17 hr
May 1, 6:29 AM EDTSevere Thunderstorm WarningDTX46 min
May 5, 2:52 PM EDTMesoscale DiscussionSPC113 min
May 7, 2:59 PM EDTMesoscale DiscussionSPC91 min
May 7, 3:30 PM EDTTornado WatchSPC9 hr
May 7, 6:48 PM EDTSevere Thunderstorm WarningDTX44 min
May 7, 7:25 PM EDTMesoscale DiscussionSPC95 min
May 7, 8:28 PM EDTWind AdvisoryDTX19 hr
May 9, 12:06 PM EDTFreeze WarningDTX20 hr
May 12, 3:19 PM EDTFlood WatchDTX29 hr
May 23, 3:30 AM EDTDense Fog AdvisoryDTX7 hr
May 23, 10:21 AM EDTRiver Flood WarningDTX43 hr
May 31, 12:15 PM EDTSevere Thunderstorm WarningDTX75 min
Jun 4, 6:29 PM EDTSevere Thunderstorm WatchSPC5 hr
Jun 5, 4:13 AM EDTFlood WatchDTX23 hr
Jun 5, 10:11 PM EDTTornado WatchSPC7 hr
Jun 5, 11:31 PM EDTTornado WarningDTX26 min
Jun 6, 12:17 AM EDTMesoscale DiscussionSPC118 min
Jun 6, 2:15 AM EDTTornado WarningDTX31 min
Jun 18, 4:32 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 18, 6:06 PM EDTMesoscale DiscussionSPC54 min
Jun 18, 7:56 PM EDTMesoscale DiscussionSPC94 min
Jun 18, 9:26 PM EDTSevere Thunderstorm WarningDTX79 min
Jun 18, 11:21 PM EDTMesoscale DiscussionSPC54 min
Jun 21, 11:44 PM EDTMesoscale DiscussionSPC61 min
Jun 22, 12:09 AM EDTSevere Thunderstorm WatchSPC5 hr
Jun 22, 2:49 AM EDTSevere Thunderstorm WarningDTX56 min
Jun 22, 3:27 AM EDTMesoscale DiscussionSPC93 min
Jun 23, 7:40 AM EDTSevere Thunderstorm WatchSPC7 hr
Jun 23, 11:52 AM EDTMesoscale DiscussionSPC53 min
Jun 23, 12:03 PM EDTSevere Thunderstorm WarningDTX27 min
Jun 23, 7:16 PM EDTTornado WatchSPC5 hr
Jun 23, 9:46 PM EDTTornado WarningDTX59 min
Jun 23, 10:05 PM EDTTornado WarningDTX38 min
Jun 23, 10:23 PM EDTSevere Thunderstorm WarningDTX51 min
Jun 23, 10:32 PM EDTTornado WarningDTX40 min
Jun 23, 10:37 PM EDTAreal Flood AdvisoryDTX3 hr
Jun 23, 10:40 PM EDTMesoscale DiscussionSPC95 min
Jun 27, 11:02 AM EDTMesoscale DiscussionSPC118 min
Jun 27, 11:38 AM EDTSevere Thunderstorm WatchSPC7 hr
Jun 27, 2:43 PM EDTMesoscale DiscussionSPC2 hr
Jun 28, 11:45 AM EDTMesoscale DiscussionSPC60 min
Jul 5, 3:18 AM EDTHeat AdvisoryDTX4 days
Jul 8, 6:09 PM EDTSevere Thunderstorm WarningDTX74 min
Jul 15, 1:30 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 15, 6:56 PM EDTMesoscale DiscussionSPC94 min
Jul 18, 1:47 PM EDTSevere Thunderstorm WatchSPC10 hr
Jul 18, 5:45 PM EDTSevere Thunderstorm WarningDTX43 min
Jul 18, 6:15 PM EDTSevere Thunderstorm WarningDTX42 min
Jul 20, 4:45 AM EDTAreal Flood AdvisoryDTX3 hr
Jul 22, 4:50 PM EDTMesoscale DiscussionSPC55 min
Jul 22, 4:53 PM EDTTornado WatchSPC3 hr
Jul 22, 8:10 PM EDTFlash Flood WatchDTX7 hr
Jul 23, 12:00 AM EDTMesoscale DiscussionSPC90 min
Jul 23, 12:35 AM EDTTornado WatchSPC3 hr
Jul 23, 4:56 PM EDTHeat AdvisoryDTX3 hr
Jul 23, 4:58 PM EDTMesoscale DiscussionSPC92 min
Jul 23, 5:23 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 23, 6:26 PM EDTTornado WarningDTX40 min
Jul 24, 3:25 AM EDTFlash Flood WatchDTX18 hr
Jul 25, 6:06 AM EDTAreal Flood AdvisoryDTX107 min
Jul 28, 12:44 PM EDTMesoscale DiscussionSPC91 min
Jul 28, 1:20 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 28, 3:02 PM EDTSevere Thunderstorm WarningDTX43 min
Jul 28, 3:10 PM EDTSevere Thunderstorm WarningDTX80 min
Jul 28, 3:37 PM EDTSevere Thunderstorm WarningDTX42 min
Jul 28, 4:37 PM EDTMesoscale DiscussionSPC83 min
Aug 15, 1:04 PM EDTMesoscale DiscussionSPC116 min
Aug 15, 1:51 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 15, 4:19 PM EDTMesoscale DiscussionSPC86 min
Sep 7, 3:56 PM EDTRed Flag WarningDTX4 hr
Sep 7, 5:06 PM EDTWind AdvisoryDTX3 hr
Sep 16, 1:35 PM EDTMesoscale DiscussionSPC85 min
Sep 16, 2:10 PM EDTSevere Thunderstorm WatchSPC5 hr
Sep 23, 3:23 PM EDTWind AdvisoryDTX29 hr
Oct 15, 4:08 PM EDTFrost AdvisoryDTX16 hr
Oct 18, 3:22 PM EDTFrost AdvisoryDTX18 hr
Oct 21, 3:08 PM EDTFreeze WarningDTX18 hr
Oct 25, 3:57 AM EDTHigh Wind WatchDTX12 hr
Oct 25, 4:10 PM EDTHigh Wind WatchDTX35 hr
Oct 25, 4:10 PM EDTHigh Wind WarningDTX24 hr
Oct 26, 7:00 AM EDTMesoscale DiscussionSPC2 hr
Oct 26, 11:04 AM EDTTornado WatchSPC4 hr
Oct 26, 12:14 PM EDTTornado WarningDTX49 min
Oct 26, 3:47 PM EDTWind AdvisoryDTX4 hr
Oct 27, 3:38 AM EDTHigh Wind WarningDTX13 hr
Oct 27, 4:25 PM EDTWind AdvisoryDTX5 hr
Nov 10, 8:27 PM ESTDense Fog AdvisoryDTX14 hr
Nov 11, 11:11 PM ESTDense Fog AdvisoryDTX11 hr
Nov 12, 8:15 PM ESTDense Fog AdvisoryDTX14 hr
Dec 11, 4:25 PM ESTWinter Weather AdvisoryDTX29 hr
Dec 12, 9:50 PM ESTWinter Weather AdvisoryDTX9 hr
Dec 29, 9:43 PM ESTFreezing Rain AdvisoryDTX11 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.