Alert archive / Tennessee / Cannon County

Weather alerts in Cannon County, Tennessee, 2012

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

Cannon County and its neighbors

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

Alerts
125
Warnings
25
Watches
20
Advisories
24
Busiest month
March21 alerts
Busiest day
March 2, 20128 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 Cannon County in 2012 had a tornado report inside them.

Cannon County, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings20100%0
Severe thunderstorm warnings191332%1100%11 min
Flash flood warnings00

Each office's whole area, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Nashville, TN: tornado warnings65789%1974%17 min
NWS Nashville, TN: severe thunderstorm warnings38119349%53163%18 min
NWS Nashville, TN: flash flood warnings22864%1861%73 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 1, 1:55 PM CSTWind AdvisoryOHX28 hr
Jan 11, 11:00 AM CSTSpecial Weather StatementOHX2 hr
Jan 12, 3:21 AM CSTWinter Weather AdvisoryOHX30 hr
Jan 17, 10:33 AM CSTMesoscale DiscussionSPC57 min
Jan 17, 1:59 PM CSTSpecial Weather StatementOHX61 min
Jan 20, 10:35 PM CSTTornado WatchSPC8 hr
Jan 21, 1:52 AM CSTMesoscale DiscussionSPC113 min
Jan 21, 2:29 AM CSTSpecial Weather StatementOHX31 min
Jan 21, 3:17 AM CSTSpecial Weather StatementOHX58 min
Jan 21, 3:50 PM CSTWind AdvisoryOHX36 hr
Jan 21, 5:02 PM CSTDense Fog AdvisoryOHX19 hr
Jan 22, 10:59 PM CSTTornado WatchSPC7 hr
Jan 23, 1:25 AM CSTMesoscale DiscussionSPC2 hr
Feb 21, 2:40 AM CSTWind AdvisoryOHX7 hr
Feb 22, 7:14 AM CSTSpecial Weather StatementOHX61 min
Feb 22, 5:49 PM CSTMesoscale DiscussionSPC86 min
Feb 23, 3:48 AM CSTWind AdvisoryOHX16 hr
Feb 29, 11:11 AM CSTMesoscale DiscussionSPC2 hr
Feb 29, 11:31 AM CSTTornado WatchSPC8 hr
Feb 29, 3:33 PM CSTSevere Thunderstorm WarningOHX27 min
Feb 29, 3:34 PM CSTMesoscale DiscussionSPC116 min
Feb 29, 3:38 PM CSTSevere Thunderstorm WarningOHX37 min
Mar 2, 4:00 AM CSTWind AdvisoryOHX17 hr
Mar 2, 9:07 AM CSTMesoscale DiscussionSPC53 min
Mar 2, 9:25 AM CSTTornado WatchSPC5 hr
Mar 2, 11:12 AM CSTFlash Flood WatchOHX10 hr
Mar 2, 1:20 PM CSTTornado WatchSPC9 hr
Mar 2, 1:36 PM CSTSpecial Weather StatementOHX54 min
Mar 2, 2:52 PM CSTSevere Thunderstorm WarningOHX38 min
Mar 2, 3:25 PM CSTMesoscale DiscussionSPC65 min
Mar 2, 6:08 PM CSTSevere Thunderstorm WarningOHX37 min
Mar 2, 6:36 PM CSTSevere Thunderstorm WarningOHX24 min
Mar 7, 12:59 PM CSTSpecial Weather StatementOHX5 hr
Mar 15, 1:08 PM CDTMesoscale DiscussionSPC2 hr
Mar 15, 2:06 PM CDTSevere Thunderstorm WatchSPC6 hr
Mar 15, 5:31 PM CDTSevere Thunderstorm WarningOHX44 min
Mar 15, 5:45 PM CDTSevere Thunderstorm WarningOHX45 min
Mar 15, 6:23 PM CDTMesoscale DiscussionSPC97 min
Mar 31, 12:29 PM CDTMesoscale DiscussionSPC91 min
Mar 31, 12:47 PM CDTSevere Thunderstorm WatchSPC8 hr
Mar 31, 1:04 PM CDTSevere Thunderstorm WarningOHX26 min
Mar 31, 1:25 PM CDTSevere Thunderstorm WarningOHX35 min
Mar 31, 3:02 PM CDTMesoscale DiscussionSPC58 min
Apr 5, 12:09 PM CDTMesoscale DiscussionSPC96 min
Apr 5, 1:21 PM CDTSevere Thunderstorm WatchSPC8 hr
Apr 5, 3:06 PM CDTMesoscale DiscussionSPC54 min
Apr 5, 3:53 PM CDTSpecial Weather StatementOHX52 min
Apr 10, 3:56 AM CDTFrost AdvisoryOHX27 hr
Apr 10, 2:11 PM CDTFreeze WatchOHX22 hr
Apr 11, 3:49 AM CDTFreeze WarningOHX28 hr
Apr 26, 5:22 AM CDTSevere Thunderstorm WatchSPC3 hr
Apr 26, 2:11 PM CDTSevere Thunderstorm WatchSPC6 hr
Apr 26, 5:40 PM CDTMesoscale DiscussionSPC95 min
May 1, 12:33 PM CDTMesoscale DiscussionSPC117 min
May 5, 5:28 AM CDTSpecial Weather StatementOHX62 min
May 6, 4:50 AM CDTSpecial Weather StatementOHX55 min
May 18, 5:32 PM CDTSevere Thunderstorm WarningOHX58 min
May 19, 4:10 PM CDTSpecial Weather StatementOHX50 min
May 19, 4:22 PM CDTSevere Thunderstorm WarningOHX53 min
May 19, 5:02 PM CDTSevere Thunderstorm WarningOHX43 min
May 30, 4:09 AM CDTDense Fog AdvisoryOHX4 hr
May 31, 5:30 PM CDTMesoscale DiscussionSPC2 hr
Jun 11, 1:12 PM CDTMesoscale DiscussionSPC93 min
Jun 11, 7:44 PM CDTSpecial Weather StatementOHX61 min
Jun 28, 3:36 AM CDTHeat AdvisoryOHX4 days
Jul 2, 5:16 PM CDTMesoscale DiscussionSPC2 hr
Jul 4, 6:38 PM CDTSpecial Weather StatementOHX37 min
Jul 5, 3:20 AM CDTHeat AdvisoryOHX64 hr
Jul 5, 2:19 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 5, 5:26 PM CDTSpecial Weather StatementOHX34 min
Jul 5, 5:36 PM CDTSevere Thunderstorm WarningOHX39 min
Jul 5, 6:14 PM CDTSevere Thunderstorm WarningOHX31 min
Jul 5, 6:20 PM CDTMesoscale DiscussionSPC115 min
Jul 5, 6:31 PM CDTSpecial Weather StatementOHX59 min
Jul 8, 5:43 PM CDTSevere Thunderstorm WarningOHX62 min
Jul 14, 4:45 PM CDTAreal Flood AdvisoryOHX6 hr
Jul 16, 7:21 PM CDTSpecial Weather StatementOHX39 min
Jul 16, 8:59 PM CDTSpecial Weather StatementOHX2 hr
Jul 16, 9:12 PM CDTAreal Flood AdvisoryOHX63 min
Jul 18, 1:21 PM CDTSevere Thunderstorm WarningOHX39 min
Jul 19, 6:42 PM CDTMesoscale DiscussionSPC93 min
Jul 19, 7:35 PM CDTSevere Thunderstorm WatchSPC4 hr
Jul 19, 10:26 PM CDTMesoscale DiscussionSPC64 min
Jul 19, 10:59 PM CDTSpecial Weather StatementOHX31 min
Jul 31, 1:55 AM CDTSevere Thunderstorm WarningOHX35 min
Jul 31, 4:11 AM CDTSpecial Weather StatementOHX34 min
Aug 1, 1:52 PM CDTMesoscale DiscussionSPC53 min
Aug 1, 2:40 PM CDTSevere Thunderstorm WatchSPC7 hr
Aug 5, 1:31 PM CDTSpecial Weather StatementOHX44 min
Aug 10, 11:20 AM CDTMesoscale DiscussionSPC85 min
Aug 13, 11:34 AM CDTSpecial Weather StatementOHX41 min
Aug 16, 9:26 PM CDTMesoscale DiscussionSPC3 hr
Aug 16, 11:24 PM CDTSevere Thunderstorm WarningOHX36 min
Aug 17, 12:05 AM CDTSevere Thunderstorm WarningOHX40 min
Sep 2, 2:20 PM CDTMesoscale DiscussionSPC115 min
Sep 2, 2:49 PM CDTTornado WatchSPC7 hr
Sep 2, 6:35 PM CDTMesoscale DiscussionSPC85 min
Sep 5, 7:17 PM CDTSpecial Weather StatementOHX43 min
Sep 7, 11:36 PM CDTMesoscale DiscussionSPC84 min
Sep 17, 2:48 AM CDTFlood WatchOHX27 hr
Sep 17, 3:56 PM CDTTornado WarningOHX34 min
Sep 17, 4:43 PM CDTTornado WarningOHX47 min
Sep 17, 6:15 PM CDTAreal Flood AdvisoryOHX4 hr
Sep 18, 2:51 AM CDTAreal Flood WarningOHX4 hr
Oct 1, 1:16 PM CDTTornado WatchSPC7 hr
Oct 1, 4:37 PM CDTSpecial Weather StatementOHX23 min
Oct 1, 5:40 PM CDTMesoscale DiscussionSPC95 min
Oct 8, 2:56 PM CDTFrost AdvisoryOHX17 hr
Oct 10, 3:55 AM CDTFrost AdvisoryOHX28 hr
Oct 14, 7:13 AM CDTWind AdvisoryOHX15 hr
Oct 18, 12:12 AM CDTSpecial Weather StatementOHX48 min
Oct 29, 3:48 PM CDTWind AdvisoryOHX27 hr
Oct 30, 2:57 PM CDTFreeze WarningOHX12 hr
Oct 31, 3:09 AM CDTFreeze WatchOHX8 hr
Oct 31, 11:00 AM CDTFreeze WarningOHX21 hr
Nov 8, 5:27 AM CSTDense Fog AdvisoryOHX4 hr
Nov 11, 3:42 AM CSTWind AdvisoryOHX20 hr
Nov 13, 12:53 AM CSTFreezing Fog AdvisoryOHX8 hr
Dec 17, 11:03 AM CSTMesoscale DiscussionSPC117 min
Dec 17, 11:26 AM CSTSevere Thunderstorm WatchSPC6 hr
Dec 17, 12:58 PM CSTMesoscale DiscussionSPC92 min
Dec 17, 3:42 PM CSTMesoscale DiscussionSPC93 min
Dec 19, 10:01 AM CSTWind AdvisoryOHX54 hr
Dec 24, 6:25 PM CSTDense Fog AdvisoryOHX14 hr
Dec 29, 6:16 PM CSTWinter Weather AdvisoryOHX5 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.