Alert archive / Tennessee / Coffee County

Weather alerts in Coffee County, Tennessee, 2020

89 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Coffee County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts
89
Warnings
11
Watches
22
Advisories
27
Busiest month
February15 alerts
Busiest day
February 6, 20208 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 Coffee County in 2020 had a tornado report inside them.

Coffee County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings7529%683%11 min
Flash flood warnings00

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Nashville, TN: tornado warnings28582%2223%8 min
NWS Nashville, TN: severe thunderstorm warnings17211533%36282%18 min
NWS Nashville, TN: flash flood warnings352140%6578%77 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, 2:18 AM CSTFlood WatchOHX58 hr
Jan 10, 3:34 AM CSTWind AdvisoryOHX36 hr
Jan 11, 6:57 AM CSTTornado WatchSPC7 hr
Jan 11, 9:28 AM CSTMesoscale DiscussionSPC92 min
Jan 11, 12:42 PM CSTTornado WatchSPC7 hr
Feb 5, 2:44 AM CSTFlood WatchOHX32 hr
Feb 5, 4:25 PM CSTTornado WatchSPC5 hr
Feb 5, 6:33 PM CSTMesoscale DiscussionSPC117 min
Feb 5, 6:48 PM CSTTornado WarningOHX15 min
Feb 5, 6:49 PM CSTAreal Flood AdvisoryOHX3 hr
Feb 5, 7:01 PM CSTSpecial Weather StatementOHX44 min
Feb 5, 9:45 PM CSTAreal Flood AdvisoryOHX3 hr
Feb 6, 1:25 AM CSTAreal Flood AdvisoryOHX3 hr
Feb 6, 4:26 AM CSTAreal Flood AdvisoryOHX9 hr
Feb 6, 2:25 PM CSTWinter Weather AdvisoryOHX22 hr
Feb 9, 3:00 AM CSTFlood WatchOHX55 hr
Feb 11, 11:34 AM CSTFlash Flood WatchOHX42 hr
Feb 12, 6:00 PM CSTMesoscale DiscussionSPC90 min
Feb 12, 6:25 PM CSTSevere Thunderstorm WarningOHX35 min
Feb 12, 6:53 PM CSTSevere Thunderstorm WarningOHX37 min
Mar 18, 3:01 AM CDTDense Fog AdvisoryOHX6 hr
Mar 20, 12:57 PM CDTFlash Flood WatchOHX7 hr
Mar 24, 3:12 AM CDTFlash Flood WatchOHX19 hr
Mar 24, 3:06 PM CDTTornado WatchSPC7 hr
Mar 24, 7:22 PM CDTAreal Flood AdvisoryOHX3 hr
Mar 28, 9:34 PM CDTTornado WatchSPC6 hr
Mar 29, 1:32 AM CDTSevere Thunderstorm WarningOHX43 min
Mar 29, 1:50 AM CDTMesoscale DiscussionSPC85 min
Mar 29, 2:03 AM CDTSevere Thunderstorm WarningOHX42 min
Mar 29, 3:10 AM CDTSevere Thunderstorm WarningOHX35 min
Apr 8, 9:52 PM CDTMesoscale DiscussionSPC113 min
Apr 8, 10:16 PM CDTSevere Thunderstorm WatchSPC6 hr
Apr 8, 11:16 PM CDTSpecial Weather StatementOHX44 min
Apr 8, 11:52 PM CDTSpecial Weather StatementOHX38 min
Apr 10, 10:32 AM CDTFrost AdvisoryOHX21 hr
Apr 11, 9:03 PM CDTFlash Flood WatchOHX34 hr
Apr 11, 9:10 PM CDTWind AdvisoryOHX37 hr
Apr 13, 5:17 PM CDTFreeze WatchOHX20 hr
Apr 14, 1:32 PM CDTFreeze WarningOHX19 hr
Apr 15, 3:38 AM CDTFreezing Fog AdvisoryOHX5 hr
Apr 15, 2:21 PM CDTFrost AdvisoryOHX18 hr
Apr 23, 4:20 AM CDTWind AdvisoryOHX11 hr
Apr 25, 2:32 PM CDTMesoscale DiscussionSPC88 min
Apr 27, 3:09 AM CDTDense Fog AdvisoryOHX6 hr
May 3, 3:08 PM CDTMesoscale DiscussionSPC67 min
May 3, 3:40 PM CDTSevere Thunderstorm WatchSPC4 hr
May 3, 5:06 PM CDTSevere Thunderstorm WarningOHX39 min
May 3, 6:18 PM CDTMesoscale DiscussionSPC57 min
May 4, 2:02 PM CDTMesoscale DiscussionSPC118 min
May 4, 6:21 PM CDTMesoscale DiscussionSPC54 min
May 4, 6:42 PM CDTSevere Thunderstorm WatchSPC6 hr
May 4, 8:16 PM CDTMesoscale DiscussionSPC89 min
May 7, 2:30 AM CDTFreeze WatchOHX25 hr
May 8, 3:06 AM CDTFreeze WarningOHX29 hr
May 9, 3:13 AM CDTFrost AdvisoryOHX29 hr
May 20, 3:50 AM CDTDense Fog AdvisoryOHX4 hr
May 22, 8:12 PM CDTSpecial Weather StatementOHX48 min
May 22, 8:45 PM CDTSpecial Weather StatementOHX75 min
Jun 28, 6:05 PM CDTSpecial Weather StatementOHX40 min
Jun 28, 6:42 PM CDTSevere Thunderstorm WarningOHX33 min
Jul 12, 9:18 PM CDTSpecial Weather StatementOHX27 min
Jul 20, 11:57 AM CDTMesoscale DiscussionSPC2 hr
Jul 31, 12:21 PM CDTMesoscale DiscussionSPC54 min
Aug 10, 1:17 PM CDTMesoscale DiscussionSPC118 min
Aug 11, 1:23 AM CDTAreal Flood AdvisoryOHX3 hr
Aug 28, 1:04 PM CDTTornado WatchSPC3 hr
Aug 28, 1:25 PM CDTMesoscale DiscussionSPC65 min
Aug 28, 3:46 PM CDTTornado WatchSPC4 hr
Aug 28, 4:39 PM CDTSpecial Weather StatementOHX36 min
Aug 28, 5:32 PM CDTSpecial Weather StatementOHX28 min
Aug 29, 3:22 PM CDTMesoscale DiscussionSPC113 min
Aug 30, 3:15 PM CDTMesoscale DiscussionSPC3 hr
Aug 30, 6:43 PM CDTSpecial Weather StatementOHX47 min
Aug 30, 6:57 PM CDTSpecial Weather StatementOHX33 min
Sep 4, 3:53 PM CDTSpecial Weather StatementOHX52 min
Sep 23, 2:45 PM CDTFlood WatchOHX31 hr
Sep 28, 11:52 PM CDTDense Fog AdvisoryOHX9 hr
Oct 12, 3:41 AM CDTDense Fog AdvisoryOHX4 hr
Oct 16, 9:50 AM CDTFrost AdvisoryOHX22 hr
Oct 28, 10:15 AM CDTFlash Flood WatchOHX19 hr
Oct 30, 2:21 PM CDTFreeze WatchOHX36 hr
Nov 1, 1:18 AM CSTFreeze WarningOHX31 hr
Nov 14, 2:39 PM CSTWind AdvisoryOHX27 hr
Nov 24, 8:23 PM CSTWind AdvisoryOHX19 hr
Nov 27, 1:37 AM CSTDense Fog AdvisoryOHX8 hr
Dec 5, 2:06 AM CSTFreezing Fog AdvisoryOHX7 hr
Dec 6, 1:40 AM CSTFreezing Fog AdvisoryOHX7 hr
Dec 20, 8:14 PM CSTDense Fog AdvisoryOHX8 hr
Dec 23, 1:46 PM CSTWind AdvisoryOHX10 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 archive20192021

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.