Alert archive / Tennessee / Lewis County

Weather alerts in Lewis County, Tennessee, 2017

119 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Lewis County and its neighbors

Each county as a circle sized by its count in 2017. Tap one for its archive.

Alerts
119
Warnings
26
Watches
13
Advisories
38
Busiest month
March36 alerts
Busiest day
March 1, 20178 alerts

Over time

By month

Warning verification

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

3 of 5 tornado warnings covering Lewis County in 2017 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 11 minutes after it went out.

Lewis County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings5340%1100%11 min
Severe thunderstorm warnings10910%1050%17 min
Flash flood warnings550%0

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Nashville, TN: tornado warnings47883%2540%16 min
NWS Nashville, TN: severe thunderstorm warnings21113536%55876%16 min
NWS Nashville, TN: flash flood warnings352820%11065%118 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, 7:26 PM CSTDense Fog AdvisoryOHX14 hr
Jan 6, 2:31 AM CSTWinter Weather AdvisoryOHX13 hr
Jan 7, 3:18 AM CSTWind Chill AdvisoryOHX6 hr
Jan 9, 6:48 PM CSTWind AdvisoryOHX23 hr
Jan 13, 10:21 PM CSTDense Fog AdvisoryOHX11 hr
Jan 22, 10:13 PM CSTWind AdvisoryOHX14 hr
Feb 7, 7:28 AM CSTMesoscale DiscussionSPC2 hr
Feb 7, 9:14 AM CSTSpecial Weather StatementOHX46 min
Feb 7, 9:35 AM CSTSpecial Weather StatementOHX55 min
Feb 8, 3:02 PM CSTMesoscale DiscussionSPC118 min
Feb 8, 4:53 PM CSTSevere Thunderstorm WatchSPC6 hr
Feb 8, 5:13 PM CSTSpecial Weather StatementOHX47 min
Feb 8, 7:04 PM CSTMesoscale DiscussionSPC86 min
Feb 8, 8:55 PM CSTMesoscale DiscussionSPC65 min
Feb 19, 4:05 AM CSTDense Fog AdvisoryOHX4 hr
Mar 1, 4:19 AM CSTMesoscale DiscussionSPC56 min
Mar 1, 4:57 AM CSTTornado WatchSPC5 hr
Mar 1, 5:28 AM CSTMesoscale DiscussionSPC2 hr
Mar 1, 6:04 AM CSTSevere Thunderstorm WarningOHX41 min
Mar 1, 8:17 AM CSTSpecial Weather StatementOHX28 min
Mar 1, 8:45 AM CSTSpecial Weather StatementOHX45 min
Mar 1, 9:42 AM CSTSpecial Weather StatementOHX33 min
Mar 1, 9:57 AM CSTAreal Flood AdvisoryOHX2 hr
Mar 7, 12:37 AM CSTWind AdvisoryOHX10 hr
Mar 9, 7:58 PM CSTMesoscale DiscussionSPC92 min
Mar 9, 8:38 PM CSTSevere Thunderstorm WatchSPC4 hr
Mar 9, 10:37 PM CSTSevere Thunderstorm WarningOHX23 min
Mar 9, 10:42 PM CSTMesoscale DiscussionSPC63 min
Mar 9, 10:50 PM CSTSevere Thunderstorm WarningOHX25 min
Mar 10, 11:27 AM CSTFreeze WarningOHX21 hr
Mar 11, 3:36 AM CSTWinter Weather AdvisoryOHX21 hr
Mar 11, 3:44 AM CSTFreeze WarningOHX26 hr
Mar 13, 3:06 PM CDTFreeze WarningOHX43 hr
Mar 15, 2:23 AM CDTFreeze WarningOHX32 hr
Mar 21, 1:53 PM CDTMesoscale DiscussionSPC3 hr
Mar 21, 2:33 PM CDTSevere Thunderstorm WatchSPC7 hr
Mar 21, 3:14 PM CDTSevere Thunderstorm WarningOHX46 min
Mar 21, 3:25 PM CDTSevere Thunderstorm WarningOHX39 min
Mar 21, 3:26 PM CDTSevere Thunderstorm WarningOHX49 min
Mar 21, 3:53 PM CDTSevere Thunderstorm WarningOHX37 min
Mar 27, 11:26 AM CDTMesoscale DiscussionSPC3 hr
Mar 27, 12:08 PM CDTSevere Thunderstorm WatchSPC8 hr
Mar 27, 1:58 PM CDTMesoscale DiscussionSPC2 hr
Mar 27, 3:39 PM CDTMesoscale DiscussionSPC2 hr
Mar 27, 4:43 PM CDTMesoscale DiscussionSPC92 min
Mar 27, 5:59 PM CDTMesoscale DiscussionSPC91 min
Mar 27, 6:02 PM CDTTornado WarningOHX28 min
Mar 27, 6:28 PM CDTTornado WarningOHX32 min
Mar 27, 7:00 PM CDTSpecial Weather StatementOHX45 min
Mar 29, 2:37 PM CDTWind AdvisoryOHX13 hr
Mar 30, 5:40 PM CDTMesoscale DiscussionSPC65 min
Apr 3, 9:15 AM CDTWind AdvisoryOHX6 hr
Apr 5, 1:02 PM CDTMesoscale DiscussionSPC2 hr
Apr 5, 1:50 PM CDTTornado WatchSPC8 hr
Apr 5, 4:02 PM CDTWind AdvisoryOHX29 hr
Apr 7, 3:30 AM CDTFreeze WarningOHX29 hr
Apr 21, 1:13 PM CDTMesoscale DiscussionSPC2 hr
Apr 21, 2:25 PM CDTSpecial Weather StatementOHX20 min
Apr 21, 8:20 PM CDTFlash Flood WatchOHX31 hr
Apr 22, 5:06 AM CDTAreal Flood AdvisoryOHX114 min
Apr 22, 12:51 PM CDTMesoscale DiscussionSPC114 min
Apr 22, 3:01 PM CDTSevere Thunderstorm WarningOHX44 min
Apr 22, 3:15 PM CDTFlash Flood WarningOHX3 hr
Apr 22, 4:56 PM CDTMesoscale DiscussionSPC64 min
Apr 23, 2:52 PM CDTAreal Flood AdvisoryOHX3 hr
Apr 23, 5:29 PM CDTAreal Flood AdvisoryOHX3 hr
Apr 24, 6:49 PM CDTDense Fog AdvisoryOHX14 hr
Apr 30, 2:12 AM CDTWind AdvisoryOHX19 hr
Apr 30, 9:05 PM CDTWind AdvisoryOHX22 hr
May 27, 9:13 AM CDTMesoscale DiscussionSPC92 min
May 27, 5:13 PM CDTSevere Thunderstorm Watch PDSSPC7 hr
May 27, 8:16 PM CDTSpecial Weather StatementOHX44 min
May 27, 8:43 PM CDTSevere Thunderstorm WarningOHX32 min
May 27, 9:01 PM CDTSpecial Weather StatementOHX29 min
Jun 6, 2:50 AM CDTDense Fog AdvisoryOHX6 hr
Jun 15, 11:36 AM CDTMesoscale DiscussionSPC114 min
Jun 16, 1:58 AM CDTDense Fog AdvisoryOHX6 hr
Jun 18, 2:19 PM CDTFlash Flood WatchOHX13 hr
Jun 18, 5:28 PM CDTSpecial Weather StatementOHX62 min
Jun 23, 10:54 AM CDTMesoscale DiscussionSPC96 min
Jul 1, 12:18 PM CDTMesoscale DiscussionSPC117 min
Jul 5, 9:18 PM CDTSpecial Weather StatementOHX42 min
Jul 5, 9:22 PM CDTMesoscale DiscussionSPC53 min
Jul 6, 7:56 AM CDTSpecial Weather StatementOHX64 min
Jul 13, 1:07 PM CDTSpecial Weather StatementOHX38 min
Jul 15, 10:06 AM CDTFlash Flood WatchOHX5 hr
Jul 15, 1:11 PM CDTAreal Flood AdvisoryOHX2 hr
Jul 16, 4:10 AM CDTDense Fog AdvisoryOHX5 hr
Jul 20, 3:43 AM CDTHeat AdvisoryOHX4 days
Jul 28, 5:10 AM CDTAreal Flood AdvisoryOHX2 hr
Jul 28, 6:07 AM CDTFlash Flood WarningOHX3 hr
Jul 28, 7:00 AM CDTFlash Flood WarningOHX2 hr
Jul 28, 8:46 AM CDTFlash Flood WarningOHX89 min
Jul 28, 2:42 PM CDTAreal Flood AdvisoryOHX5 hr
Aug 22, 7:11 PM CDTSpecial Weather StatementOHX49 min
Aug 30, 2:46 PM CDTFlash Flood WatchOHX46 hr
Aug 31, 4:43 PM CDTTornado WarningOHX32 min
Aug 31, 5:13 PM CDTTornado WarningOHX32 min
Aug 31, 5:44 PM CDTTornado WarningOHX31 min
Aug 31, 7:05 PM CDTFlash Flood WarningOHX7 hr
Aug 31, 9:30 PM CDTAreal Flood AdvisoryOHX2 hr
Aug 31, 11:42 PM CDTWind AdvisoryOHX16 hr
Sep 10, 3:04 PM CDTWind AdvisoryOHX40 hr
Sep 15, 2:27 AM CDTDense Fog AdvisoryOHX7 hr
Oct 13, 5:15 AM CDTDense Fog AdvisoryOHX4 hr
Oct 24, 2:37 PM CDTFrost AdvisoryOHX18 hr
Oct 28, 8:27 PM CDTFrost AdvisoryOHX13 hr
Oct 29, 3:38 AM CDTFrost AdvisoryOHX21 hr
Oct 29, 3:38 AM CDTFreeze WarningOHX29 hr
Nov 4, 12:45 AM CDTDense Fog AdvisoryOHX8 hr
Nov 6, 3:24 AM CSTSpecial Weather StatementOHX51 min
Nov 17, 2:50 PM CSTWind AdvisoryOHX33 hr
Nov 18, 12:35 PM CSTSevere Thunderstorm WatchSPC6 hr
Nov 18, 3:18 PM CSTMesoscale DiscussionSPC117 min
Nov 18, 3:47 PM CSTSevere Thunderstorm WarningOHX28 min
Nov 18, 4:11 PM CSTSpecial Weather StatementOHX49 min
Dec 18, 11:54 PM CSTDense Fog AdvisoryOHX9 hr
Dec 21, 1:46 PM CSTFlash Flood WatchOHX43 hr
Dec 23, 5:30 AM CSTAreal Flood AdvisoryOHX3 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 archive20162018

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.