Alert archive / Tennessee / Carroll County

Weather alerts in Carroll County, Tennessee, 2020

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

Carroll County and its neighbors

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

Alerts
126
Warnings
28
Watches
19
Advisories
44
Busiest month
May23 alerts
Busiest day
May 3, 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.

3 of 4 tornado warnings covering Carroll County in 2020 had a tornado report inside them; 2 of 3 tornado reports fell inside a warning, on average 12 minutes after it went out.

Carroll County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings4325%367%12 min
Severe thunderstorm warnings171229%17100%21 min
Flash flood warnings3233%0

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Memphis, TN: tornado warnings652069%4772%10 min
NWS Memphis, TN: severe thunderstorm warnings22113340%42080%25 min
NWS Memphis, TN: flash flood warnings361753%4173%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 9, 3:49 PM CSTFlash Flood WatchMEG47 hr
Jan 10, 3:26 AM CSTWind AdvisoryMEG31 hr
Jan 11, 4:17 AM CSTTornado WatchSPC6 hr
Jan 11, 5:59 AM CSTSpecial Weather StatementMEG46 min
Jan 11, 6:38 AM CSTSevere Thunderstorm WarningMEG37 min
Feb 6, 7:27 PM CSTWinter Weather AdvisoryMEG13 hr
Feb 9, 3:05 AM CSTFlood WatchMEG4 days
Mar 2, 10:01 PM CSTSevere Thunderstorm WarningMEG44 min
Mar 2, 10:45 PM CSTSevere Thunderstorm WarningMEG45 min
Mar 2, 11:10 PM CSTMesoscale DiscussionSPC2 hr
Mar 3, 12:59 AM CSTSevere Thunderstorm WatchSPC4 hr
Mar 3, 2:34 AM CSTMesoscale DiscussionSPC116 min
Mar 3, 2:53 AM CSTSevere Thunderstorm WarningMEG29 min
Mar 12, 11:13 AM CDTMesoscale DiscussionSPC2 hr
Mar 12, 11:44 AM CDTTornado WatchSPC6 hr
Mar 20, 2:22 AM CDTMesoscale DiscussionSPC83 min
Mar 24, 11:27 AM CDTMesoscale DiscussionSPC2 hr
Mar 28, 4:59 PM CDTMesoscale DiscussionSPC61 min
Mar 28, 6:34 PM CDTTornado WatchSPC7 hr
Mar 28, 8:25 PM CDTMesoscale DiscussionSPC95 min
Mar 28, 9:07 PM CDTSevere Thunderstorm WarningMEG38 min
Mar 28, 9:37 PM CDTSevere Thunderstorm WarningMEG53 min
Apr 8, 7:04 PM CDTTornado WatchSPC7 hr
Apr 8, 9:04 PM CDTSevere Thunderstorm WarningMEG41 min
Apr 10, 3:20 PM CDTFrost AdvisoryMEG16 hr
Apr 12, 3:56 AM CDTFlash Flood WatchMEG20 hr
Apr 12, 3:57 AM CDTWind AdvisoryMEG26 hr
Apr 12, 8:19 PM CDTSevere Thunderstorm WatchSPC4 hr
Apr 12, 9:44 PM CDTMesoscale DiscussionSPC91 min
Apr 12, 11:19 PM CDTMesoscale DiscussionSPC86 min
Apr 12, 11:36 PM CDTSpecial Weather StatementMEG24 min
Apr 13, 12:05 AM CDTSpecial Weather StatementMEG40 min
Apr 13, 1:43 AM CDTHigh Wind WarningMEG4 hr
Apr 13, 6:06 PM CDTFreeze WatchMEG24 hr
Apr 14, 2:06 PM CDTFreeze WarningMEG19 hr
Apr 15, 3:27 AM CDTFreezing Fog AdvisoryMEG5 hr
Apr 15, 3:17 PM CDTFrost AdvisoryMEG18 hr
Apr 24, 5:45 AM CDTDense Fog AdvisoryMEG3 hr
Apr 25, 11:06 AM CDTWind AdvisoryMEG9 hr
Apr 28, 7:35 PM CDTSevere Thunderstorm WatchSPC7 hr
May 3, 11:44 AM CDTSevere Thunderstorm WatchSPC7 hr
May 3, 12:50 PM CDTMesoscale DiscussionSPC85 min
May 3, 2:38 PM CDTSevere Thunderstorm WarningMEG52 min
May 3, 3:10 PM CDTSevere Thunderstorm WarningMEG50 min
May 3, 3:27 PM CDTSevere Thunderstorm WarningMEG18 min
May 3, 5:25 PM CDTSevere Thunderstorm WarningMEG50 min
May 3, 6:18 PM CDTMesoscale DiscussionSPC57 min
May 3, 6:43 PM CDTAreal Flood AdvisoryMEG2 hr
May 4, 2:02 PM CDTMesoscale DiscussionSPC118 min
May 4, 2:58 PM CDTSevere Thunderstorm WatchSPC6 hr
May 4, 6:00 PM CDTSevere Thunderstorm WarningMEG45 min
May 4, 6:21 PM CDTMesoscale DiscussionSPC54 min
May 4, 6:33 PM CDTSpecial Weather StatementMEG27 min
May 4, 6:41 PM CDTSevere Thunderstorm WarningMEG49 min
May 4, 6:49 PM CDTAreal Flood AdvisoryMEG116 min
May 4, 6:53 PM CDTFlash Flood WarningMEG3 hr
May 4, 7:01 PM CDTSevere Thunderstorm WarningMEG18 min
May 7, 3:19 PM CDTWind AdvisoryMEG28 hr
May 8, 3:03 AM CDTFrost AdvisoryMEG29 hr
May 17, 5:14 PM CDTSpecial Weather StatementMEG46 min
May 20, 4:35 AM CDTDense Fog AdvisoryMEG4 hr
May 24, 2:46 PM CDTSpecial Weather StatementMEG29 min
May 28, 12:18 PM CDTMesoscale DiscussionSPC87 min
Jun 4, 5:29 PM CDTTornado WarningMEG31 min
Jun 4, 6:14 PM CDTTornado WarningMEG31 min
Jun 4, 6:43 PM CDTTornado WarningMEG32 min
Jun 4, 7:14 PM CDTTornado Warning Tornado observedMEG46 min
Jun 5, 6:34 AM CDTDense Fog AdvisoryMEG54 min
Jun 5, 11:03 AM CDTSevere Thunderstorm WatchSPC6 hr
Jun 30, 1:37 PM CDTSpecial Weather StatementMEG23 min
Jun 30, 1:47 PM CDTAreal Flood AdvisoryMEG118 min
Jun 30, 2:56 PM CDTAreal Flood AdvisoryMEG2 hr
Jun 30, 7:20 PM CDTSpecial Weather StatementMEG25 min
Jun 30, 7:48 PM CDTSpecial Weather StatementMEG27 min
Jun 30, 8:01 PM CDTSpecial Weather StatementMEG44 min
Jun 30, 9:25 PM CDTAreal Flood AdvisoryMEG3 hr
Jul 1, 11:26 AM CDTFlash Flood WatchMEG17 hr
Jul 1, 2:54 PM CDTMesoscale DiscussionSPC66 min
Jul 2, 4:11 AM CDTDense Fog AdvisoryMEG5 hr
Jul 8, 7:30 PM CDTAreal Flood AdvisoryMEG60 min
Jul 12, 8:22 AM CDTAreal Flood AdvisoryMEG3 hr
Jul 12, 8:26 AM CDTFlash Flood WarningMEG3 hr
Jul 12, 8:32 AM CDTSpecial Weather StatementMEG43 min
Jul 12, 8:41 AM CDTSevere Thunderstorm WarningMEG34 min
Jul 15, 2:23 PM CDTHeat AdvisoryMEG28 hr
Jul 16, 12:26 PM CDTMesoscale DiscussionSPC2 hr
Jul 16, 3:12 PM CDTAreal Flood AdvisoryMEG108 min
Jul 23, 6:23 AM CDTAreal Flood AdvisoryMEG67 min
Jul 24, 4:42 PM CDTAreal Flood AdvisoryMEG3 hr
Aug 2, 1:21 AM CDTDense Fog AdvisoryMEG8 hr
Aug 3, 7:07 PM CDTAreal Flood AdvisoryMEG3 hr
Aug 9, 3:29 PM CDTHeat AdvisoryMEG28 hr
Aug 11, 12:01 PM CDTAreal Flood AdvisoryMEG3 hr
Aug 15, 3:15 AM CDTDense Fog AdvisoryMEG6 hr
Aug 22, 2:12 AM CDTDense Fog AdvisoryMEG7 hr
Aug 23, 3:00 AM CDTDense Fog AdvisoryMEG7 hr
Aug 27, 1:04 AM CDTFlash Flood WatchMEG51 hr
Aug 27, 2:33 AM CDTWind AdvisoryMEG37 hr
Aug 27, 7:02 PM CDTSevere Thunderstorm WarningMEG43 min
Aug 28, 6:47 AM CDTMesoscale DiscussionSPC88 min
Aug 29, 3:22 PM CDTMesoscale DiscussionSPC113 min
Aug 31, 12:16 PM CDTMesoscale DiscussionSPC89 min
Sep 1, 4:59 AM CDTDense Fog AdvisoryMEG4 hr
Sep 1, 9:49 AM CDTFlash Flood WatchMEG41 hr
Sep 1, 1:02 PM CDTAreal Flood AdvisoryMEG3 hr
Sep 1, 1:41 PM CDTSpecial Weather StatementMEG49 min
Sep 1, 2:20 PM CDTAreal Flood AdvisoryMEG3 hr
Sep 1, 6:13 PM CDTSevere Thunderstorm WatchSPC4 hr
Sep 2, 12:35 PM CDTMesoscale DiscussionSPC2 hr
Sep 2, 1:18 PM CDTAreal Flood AdvisoryMEG3 hr
Sep 13, 2:59 AM CDTDense Fog AdvisoryMEG6 hr
Oct 12, 12:28 AM CDTDense Fog AdvisoryMEG9 hr
Oct 16, 9:42 AM CDTFrost AdvisoryMEG22 hr
Oct 23, 1:30 PM CDTMesoscale DiscussionSPC3 hr
Oct 23, 3:05 PM CDTSevere Thunderstorm WarningMEG25 min
Oct 23, 4:58 PM CDTFlash Flood WarningMEG3 hr
Oct 23, 4:58 PM CDTSpecial Weather StatementMEG32 min
Oct 23, 5:33 PM CDTSpecial Weather StatementMEG27 min
Oct 28, 7:06 PM CDTAreal Flood AdvisoryMEG3 hr
Oct 30, 1:34 PM CDTFrost AdvisoryMEG19 hr
Oct 31, 2:45 PM CDTFreeze WatchMEG13 hr
Nov 1, 3:05 AM CSTFreeze WarningMEG30 hr
Nov 14, 7:19 PM CSTWind AdvisoryMEG15 hr
Nov 19, 4:17 AM CSTRed Flag WarningMEG14 hr
Nov 23, 5:41 AM CSTFreezing Fog AdvisoryMEG2 hr
Nov 24, 2:03 PM CSTWind AdvisoryMEG24 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.