Alert archive / Michigan / Ontonagon County

Weather alerts in Ontonagon County, Michigan, 2012

64 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Ontonagon County and its neighbors

Each county as a circle sized by its count in 2012. Tap one for its archive.

Alerts
64
Warnings
20
Watches
12
Advisories
25
Busiest month
May12 alerts
Busiest day
July 3, 20125 alerts

Over time

By month

Warning verification

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

Ontonagon County, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings8275%540%46 min
Flash flood warnings00

Each office's whole area, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Marquette, MI: tornado warnings2150%1100%6 min
NWS Marquette, MI: severe thunderstorm warnings642364%7161%22 min
NWS Marquette, MI: flash flood warnings10100%10%

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 10, 4:14 AM ESTWinter Storm WatchMQT49 hr
Jan 11, 4:44 AM ESTWinter Storm WarningMQT59 hr
Jan 16, 4:45 AM ESTLake Effect Snow AdvisoryMQT50 hr
Jan 17, 11:52 AM ESTLake Effect Snow WarningMQT7 hr
Jan 18, 5:01 AM ESTWinter Storm WatchMQT11 hr
Jan 18, 4:22 PM ESTLake Effect Snow WarningMQT33 hr
Jan 19, 4:36 AM ESTWind Chill AdvisoryMQT29 hr
Jan 22, 4:26 PM ESTWinter Storm WarningMQT23 hr
Jan 23, 3:03 PM ESTWinter Weather AdvisoryMQT16 hr
Jan 27, 4:14 AM ESTLake Effect Snow WatchMQT24 hr
Jan 28, 4:06 AM ESTLake Effect Snow WarningMQT39 hr
Feb 24, 4:21 AM ESTWinter Weather AdvisoryMQT11 hr
Feb 24, 3:31 PM ESTLake Effect Snow WarningMQT21 hr
Feb 26, 4:33 AM ESTWinter Weather AdvisoryMQT7 hr
Feb 26, 11:52 AM ESTWinter Weather AdvisoryMQT25 hr
Feb 27, 4:51 AM ESTWinter Storm WatchMQT24 hr
Feb 28, 4:25 AM ESTWinter Storm WarningMQT41 hr
Mar 26, 5:16 AM EDTFreezing Rain AdvisoryMQT28 hr
Mar 27, 11:09 AM EDTWind AdvisoryMQT6 hr
Apr 8, 9:16 AM EDTRed Flag WarningMQT12 hr
Apr 14, 2:42 PM EDTRed Flag WarningMQT5 hr
Apr 16, 4:50 AM EDTWind AdvisoryMQT18 hr
May 12, 3:06 PM EDTFire Weather WatchMQT13 hr
May 13, 4:10 AM EDTRed Flag WarningMQT16 hr
May 17, 3:54 PM EDTFire Weather WatchMQT38 hr
May 19, 5:01 AM EDTRed Flag WarningMQT15 hr
May 20, 12:17 PM EDTSevere Thunderstorm WarningMQT43 min
May 20, 1:24 PM EDTSevere Thunderstorm WatchSPC7 hr
May 21, 2:41 PM EDTFrost AdvisoryMQT17 hr
May 24, 4:17 AM EDTWind AdvisoryMQT16 hr
May 24, 3:22 PM EDTTornado WatchSPC5 hr
May 28, 10:11 PM EDTSevere Thunderstorm WarningMQT34 min
May 30, 4:48 AM EDTFrost AdvisoryMQT27 hr
May 31, 3:32 PM EDTFrost AdvisoryMQT16 hr
Jun 12, 4:26 AM EDTFrost AdvisoryMQT27 hr
Jun 20, 3:10 PM EDTMesoscale DiscussionSPC95 min
Jun 20, 4:25 PM EDTSevere Thunderstorm WarningMQT65 min
Jun 20, 5:02 PM EDTAreal Flood AdvisoryMQT6 hr
Jul 2, 10:17 PM EDTMesoscale DiscussionSPC118 min
Jul 2, 11:13 PM EDTSevere Thunderstorm WatchSPC4 hr
Jul 2, 11:46 PM EDTSevere Thunderstorm WarningMQT59 min
Jul 3, 12:17 AM EDTMesoscale DiscussionSPC88 min
Jul 3, 12:38 AM EDTSevere Thunderstorm WarningMQT67 min
Jul 4, 4:57 PM EDTMesoscale DiscussionSPC93 min
Jul 6, 4:41 PM EDTSevere Thunderstorm WarningMQT40 min
Sep 4, 4:27 PM EDTSevere Thunderstorm WatchSPC8 hr
Sep 4, 7:39 PM EDTMesoscale DiscussionSPC66 min
Sep 4, 8:42 PM EDTSevere Thunderstorm WarningMQT63 min
Sep 4, 9:30 PM EDTMesoscale DiscussionSPC60 min
Sep 14, 5:02 AM EDTFrost AdvisoryMQT27 hr
Sep 17, 4:07 PM EDTFreeze WatchMQT24 hr
Sep 18, 3:57 PM EDTFrost AdvisoryMQT16 hr
Oct 5, 3:41 PM EDTWinter Weather AdvisoryMQT19 hr
Oct 24, 7:38 PM EDTMesoscale DiscussionSPC2 hr
Oct 25, 9:14 AM EDTSevere Thunderstorm WarningMQT61 min
Nov 11, 3:57 PM ESTWinter Weather AdvisoryMQT36 hr
Nov 20, 4:00 PM ESTDense Fog AdvisoryMQT16 hr
Nov 22, 4:37 AM ESTWinter Weather AdvisoryMQT12 hr
Nov 22, 4:32 PM ESTWinter Storm WarningMQT32 hr
Nov 22, 4:32 PM ESTWinter Weather AdvisoryMQT32 hr
Nov 25, 4:26 AM ESTLake Effect Snow AdvisoryMQT42 hr
Dec 8, 3:58 AM ESTWinter Storm WatchMQT12 hr
Dec 8, 3:58 PM ESTWinter Weather AdvisoryMQT45 hr
Dec 19, 5:10 AM ESTWinter Weather AdvisoryMQT53 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 archive20112013

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.