Alert archive / Tennessee / Sullivan County

Weather alerts in Sullivan County, Tennessee, 2018

89 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Sullivan County and its neighbors

Each county as a circle sized by its count in 2018. Tap one for its archive.

Alerts
89
Warnings
27
Watches
7
Advisories
32
Busiest month
April14 alerts
Busiest day
February 11, 20186 alerts

Over time

By month

Warning verification

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

Sullivan County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings14137%7100%21 min
Flash flood warnings110%0

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Morristown, TN: tornado warnings80100%0
NWS Morristown, TN: severe thunderstorm warnings21016223%26784%22 min
NWS Morristown, TN: flash flood warnings372727%3583%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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 7, 4:06 AM ESTWinter Weather AdvisoryMRX37 hr
Jan 15, 10:08 AM ESTWinter Weather AdvisoryMRX45 hr
Feb 1, 3:12 AM ESTWinter Weather AdvisoryMRX30 hr
Feb 9, 3:46 AM ESTFlood WatchMRX63 hr
Feb 10, 10:20 PM ESTAreal Flood AdvisoryMRX4 hr
Feb 11, 2:17 AM ESTAreal Flood AdvisoryMRX3 hr
Feb 11, 5:26 AM ESTAreal Flood AdvisoryMRX3 hr
Feb 11, 8:30 AM ESTAreal Flood AdvisoryMRX4 hr
Feb 11, 10:18 AM ESTRiver Flood WarningMRX36 hr
Feb 11, 12:33 PM ESTAreal Flood AdvisoryMRX6 hr
Feb 25, 5:48 AM ESTSpecial Weather StatementMRX42 min
Mar 13, 3:23 AM EDTWinter Weather AdvisoryMRX32 hr
Mar 17, 3:25 PM EDTMesoscale DiscussionSPC2 hr
Mar 17, 4:33 PM EDTSevere Thunderstorm WatchSPC7 hr
Mar 17, 7:06 PM EDTMesoscale DiscussionSPC114 min
Mar 17, 8:02 PM EDTSevere Thunderstorm WarningMRX43 min
Mar 17, 8:41 PM EDTSevere Thunderstorm WarningMRX64 min
Mar 17, 9:11 PM EDTSevere Thunderstorm WarningMRX49 min
Mar 17, 9:51 PM EDTSevere Thunderstorm WarningMRX54 min
Mar 21, 3:40 AM EDTFreeze WarningMRX30 hr
Mar 22, 3:36 AM EDTFreeze WarningMRX30 hr
Apr 4, 2:00 AM EDTMesoscale DiscussionSPC105 min
Apr 4, 2:07 AM EDTSevere Thunderstorm WarningMRX38 min
Apr 4, 2:49 AM EDTSpecial Weather StatementMRX56 min
Apr 4, 4:32 AM EDTFreeze WarningMRX28 hr
Apr 6, 3:26 PM EDTFreeze WatchMRX12 hr
Apr 7, 3:28 AM EDTFreeze WarningMRX31 hr
Apr 10, 3:25 PM EDTFrost AdvisoryMRX18 hr
Apr 16, 4:28 AM EDTFreeze WarningMRX29 hr
Apr 16, 5:21 AM EDTAreal Flood AdvisoryMRX4 hr
Apr 18, 2:49 PM EDTFreeze WatchMRX13 hr
Apr 19, 3:59 AM EDTFreeze WarningMRX29 hr
Apr 20, 3:18 PM EDTFrost AdvisoryMRX18 hr
Apr 22, 9:40 AM EDTWind AdvisoryMRX40 hr
Apr 29, 3:26 AM EDTFrost AdvisoryMRX30 hr
May 5, 3:27 PM EDTMesoscale DiscussionSPC93 min
May 5, 10:45 PM EDTAreal Flood AdvisoryMRX3 hr
May 7, 2:58 PM EDTSpecial Weather StatementMRX47 min
May 10, 6:48 PM EDTSevere Thunderstorm WarningMRX57 min
May 26, 11:41 AM EDTAreal Flood AdvisoryMRX3 hr
May 27, 4:45 PM EDTAreal Flood AdvisoryMRX2 hr
May 27, 5:20 PM EDTFlash Flood WarningMRX54 min
May 31, 4:27 PM EDTMesoscale DiscussionSPC93 min
May 31, 5:28 PM EDTSpecial Weather StatementMRX62 min
May 31, 5:31 PM EDTMesoscale DiscussionSPC59 min
May 31, 6:16 PM EDTSpecial Weather StatementMRX59 min
Jun 3, 3:24 PM EDTMesoscale DiscussionSPC66 min
Jun 11, 5:26 PM EDTSpecial Weather StatementMRX49 min
Jun 24, 7:49 PM EDTSpecial Weather StatementMRX56 min
Jun 25, 12:29 PM EDTMesoscale DiscussionSPC61 min
Jun 25, 3:53 PM EDTSevere Thunderstorm WarningMRX37 min
Jul 6, 1:34 PM EDTSpecial Weather StatementMRX41 min
Jul 6, 2:55 PM EDTAreal Flood AdvisoryMRX2 hr
Jul 6, 5:05 PM EDTSevere Thunderstorm WarningMRX40 min
Jul 16, 1:20 AM EDTAreal Flood AdvisoryMRX3 hr
Jul 17, 6:03 PM EDTSpecial Weather StatementMRX42 min
Jul 20, 7:24 PM EDTMesoscale DiscussionSPC96 min
Jul 20, 10:10 PM EDTSevere Thunderstorm WarningMRX65 min
Jul 20, 10:52 PM EDTMesoscale DiscussionSPC53 min
Jul 24, 9:16 PM EDTAreal Flood AdvisoryMRX59 min
Jul 26, 3:19 AM EDTDense Fog AdvisoryMRX6 hr
Aug 8, 2:52 PM EDTSevere Thunderstorm WarningMRX23 min
Aug 31, 2:51 PM EDTAreal Flood AdvisoryMRX114 min
Sep 9, 6:33 PM EDTMesoscale DiscussionSPC2 hr
Sep 9, 6:42 PM EDTSevere Thunderstorm WarningMRX48 min
Sep 9, 6:48 PM EDTAreal Flood AdvisoryMRX117 min
Sep 9, 7:12 PM EDTSevere Thunderstorm WarningMRX78 min
Sep 10, 4:35 PM EDTAreal Flood AdvisoryMRX115 min
Sep 10, 5:19 PM EDTAreal Flood AdvisoryMRX116 min
Sep 26, 4:23 AM EDTFlash Flood WatchMRX40 hr
Sep 27, 7:24 PM EDTAreal Flood AdvisoryMRX3 hr
Oct 11, 9:02 AM EDTAreal Flood AdvisoryMRX4 hr
Oct 11, 10:56 AM EDTAreal Flood WarningMRX4 hr
Oct 21, 3:35 AM EDTFreeze WarningMRX29 hr
Oct 28, 3:49 AM EDTWind AdvisoryMRX24 hr
Oct 29, 9:32 PM EDTFrost AdvisoryMRX11 hr
Nov 6, 2:40 AM ESTMesoscale DiscussionSPC65 min
Nov 6, 5:58 AM ESTSevere Thunderstorm WarningMRX47 min
Nov 6, 6:10 AM ESTSpecial Weather StatementMRX50 min
Nov 6, 6:20 AM ESTSevere Thunderstorm WarningMRX40 min
Nov 8, 11:04 AM ESTFreeze WarningMRX47 hr
Nov 10, 12:35 PM ESTFreeze WarningMRX21 hr
Dec 6, 3:24 PM ESTWinter Storm WatchMRX36 hr
Dec 7, 3:52 PM ESTWinter Storm WarningMRX59 hr
Dec 8, 3:10 PM ESTWinter Weather AdvisoryMRX43 hr
Dec 9, 8:18 AM ESTMesoscale DiscussionSPC5 hr
Dec 11, 4:44 AM ESTFreezing Fog AdvisoryMRX6 hr
Dec 26, 3:42 PM ESTFlash Flood WatchMRX48 hr
Dec 28, 9:52 AM ESTAreal Flood AdvisoryMRX5 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 archive20172019

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.