Alert archive / Tennessee / Marion County

Weather alerts in Marion County, Tennessee, 2018

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

Marion County and its neighbors

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

Alerts
112
Warnings
31
Watches
11
Advisories
37
Busiest month
June25 alerts
Busiest day
September 26, 20188 alerts

Over time

By month

Warning verification

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

Marion County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings151220%786%13 min
Flash flood warnings20100%10%

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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 1, 3:14 AM CSTWind Chill AdvisoryMRX30 hr
Jan 3, 3:27 AM CSTWind Chill AdvisoryMRX32 hr
Jan 7, 3:06 AM CSTWinter Weather AdvisoryMRX37 hr
Jan 8, 3:20 AM CSTMesoscale DiscussionSPC5 hr
Jan 8, 10:10 AM CSTWinter Weather AdvisoryMRX95 min
Jan 12, 2:58 AM CSTWinter Weather AdvisoryMRX29 hr
Jan 15, 9:08 AM CSTWinter Weather AdvisoryMRX45 hr
Jan 16, 9:45 AM CSTWind Chill AdvisoryMRX24 hr
Feb 9, 2:46 AM CSTFlood WatchMRX63 hr
Feb 10, 5:53 PM CSTAreal Flood AdvisoryMRX3 hr
Feb 10, 7:41 PM CSTRiver Flood WarningMRX53 hr
Feb 10, 9:03 PM CSTAreal Flood AdvisoryMRX10 hr
Feb 25, 2:01 AM CSTSpecial Weather StatementMRX59 min
Feb 25, 2:55 AM CSTSpecial Weather StatementMRX65 min
Feb 27, 3:03 AM CSTFlood WatchMRX63 hr
Feb 28, 10:19 AM CSTRiver Flood WarningMRX3 days
Feb 28, 10:33 AM CSTAreal Flood AdvisoryMRX3 hr
Feb 28, 3:45 PM CSTAreal Flood WarningMRX9 hr
Mar 3, 2:22 PM CSTAreal Flood WarningMRX24 hr
Mar 17, 5:06 PM CDTMesoscale DiscussionSPC114 min
Mar 19, 4:01 PM CDTSpecial Weather StatementMRX44 min
Mar 19, 7:47 PM CDTSevere Thunderstorm WarningMRX43 min
Mar 20, 3:13 AM CDTDense Fog AdvisoryMRX6 hr
Mar 21, 2:40 AM CDTFreeze WarningMRX30 hr
Apr 3, 8:16 PM CDTMesoscale DiscussionSPC89 min
Apr 3, 8:50 PM CDTSevere Thunderstorm WatchSPC5 hr
Apr 3, 10:49 PM CDTMesoscale DiscussionSPC86 min
Apr 3, 11:08 PM CDTSevere Thunderstorm WarningMRX67 min
Apr 4, 3:32 AM CDTFreeze WarningMRX28 hr
Apr 7, 2:28 AM CDTFreeze WarningMRX31 hr
Apr 16, 3:28 AM CDTFreeze WatchMRX11 hr
Apr 16, 3:28 AM CDTFreeze WarningMRX29 hr
Apr 16, 3:43 AM CDTRiver Flood WarningMRX27 hr
Apr 22, 8:40 AM CDTWind AdvisoryMRX40 hr
Apr 23, 7:29 PM CDTAreal Flood AdvisoryMRX3 hr
Apr 23, 10:09 PM CDTAreal Flood AdvisoryMRX3 hr
May 10, 1:21 PM CDTSpecial Weather StatementMRX39 min
May 10, 2:41 PM CDTSpecial Weather StatementMRX19 min
May 10, 2:58 PM CDTSpecial Weather StatementMRX47 min
May 15, 1:52 PM CDTSpecial Weather StatementMRX23 min
May 15, 2:12 PM CDTSpecial Weather StatementMRX63 min
May 15, 3:02 PM CDTAreal Flood AdvisoryMRX3 hr
May 27, 11:12 PM CDTAreal Flood AdvisoryMRX3 hr
May 28, 3:20 AM CDTFlash Flood WatchMRX64 hr
May 29, 1:38 PM CDTMesoscale DiscussionSPC97 min
May 29, 7:21 PM CDTAreal Flood AdvisoryMRX114 min
May 31, 12:59 PM CDTAreal Flood AdvisoryMRX3 hr
May 31, 9:25 PM CDTSevere Thunderstorm WarningMRX29 min
Jun 3, 2:24 PM CDTMesoscale DiscussionSPC66 min
Jun 11, 3:41 AM CDTSpecial Weather StatementMRX34 min
Jun 11, 12:54 PM CDTSpecial Weather StatementMRX51 min
Jun 22, 12:35 PM CDTMesoscale DiscussionSPC85 min
Jun 22, 4:07 PM CDTAreal Flood AdvisoryMRX113 min
Jun 23, 10:32 AM CDTMesoscale DiscussionSPC88 min
Jun 23, 11:09 AM CDTSevere Thunderstorm WatchSPC4 hr
Jun 23, 12:18 PM CDTSpecial Weather StatementMRX42 min
Jun 23, 12:35 PM CDTSevere Thunderstorm WarningMRX40 min
Jun 23, 12:54 PM CDTSevere Thunderstorm WarningMRX51 min
Jun 24, 3:38 PM CDTSpecial Weather StatementMRX52 min
Jun 24, 3:59 PM CDTSevere Thunderstorm WarningMRX42 min
Jun 26, 6:17 PM CDTSevere Thunderstorm WarningMRX58 min
Jun 26, 7:34 PM CDTAreal Flood AdvisoryMRX116 min
Jun 27, 1:29 PM CDTMesoscale DiscussionSPC3 hr
Jun 27, 6:52 PM CDTSpecial Weather StatementMRX38 min
Jun 27, 6:57 PM CDTSevere Thunderstorm WarningMRX63 min
Jun 28, 9:15 AM CDTSevere Thunderstorm WarningMRX60 min
Jun 28, 10:14 AM CDTSevere Thunderstorm WarningMRX61 min
Jun 28, 10:22 AM CDTMesoscale DiscussionSPC113 min
Jun 28, 10:59 AM CDTAreal Flood AdvisoryMRX3 hr
Jun 28, 11:09 AM CDTSevere Thunderstorm WarningMRX36 min
Jun 28, 11:57 AM CDTSevere Thunderstorm WarningMRX33 min
Jun 28, 12:39 PM CDTFlash Flood WarningMRX90 min
Jul 6, 1:40 PM CDTAreal Flood AdvisoryMRX2 hr
Jul 6, 2:37 PM CDTSpecial Weather StatementMRX38 min
Jul 17, 4:33 PM CDTAreal Flood AdvisoryMRX117 min
Jul 20, 5:54 PM CDTMesoscale DiscussionSPC3 hr
Jul 20, 7:02 PM CDTTornado WatchSPC7 hr
Jul 21, 1:38 AM CDTMesoscale DiscussionSPC67 min
Jul 21, 2:00 AM CDTSevere Thunderstorm WatchSPC7 hr
Jul 21, 2:41 AM CDTSevere Thunderstorm WarningMRX48 min
Jul 21, 3:33 AM CDTAreal Flood AdvisoryMRX117 min
Jul 21, 4:35 AM CDTMesoscale DiscussionSPC115 min
Aug 8, 1:36 PM CDTAreal Flood AdvisoryMRX114 min
Aug 9, 1:35 PM CDTSpecial Weather StatementMRX40 min
Aug 9, 2:24 PM CDTAreal Flood AdvisoryMRX2 hr
Aug 16, 3:30 PM CDTAreal Flood AdvisoryMRX60 min
Aug 17, 7:03 PM CDTSevere Thunderstorm WarningMRX72 min
Aug 17, 7:47 PM CDTAreal Flood AdvisoryMRX118 min
Aug 30, 5:43 PM CDTSpecial Weather StatementMRX32 min
Sep 13, 5:14 PM CDTAreal Flood AdvisoryMRX3 hr
Sep 24, 9:36 PM CDTAreal Flood AdvisoryMRX3 hr
Sep 25, 7:52 PM CDTSpecial Weather StatementMRX53 min
Sep 25, 9:15 PM CDTSpecial Weather StatementHUN15 min
Sep 26, 1:01 AM CDTAreal Flood AdvisoryMRX3 hr
Sep 26, 3:23 AM CDTFlash Flood WatchMRX40 hr
Sep 26, 7:28 AM CDTAreal Flood AdvisoryMRX10 hr
Sep 26, 10:59 AM CDTFlash Flood WarningMRX6 hr
Sep 26, 3:31 PM CDTRiver Flood WarningMRX21 hr
Sep 26, 4:55 PM CDTAreal Flood WarningMRX18 hr
Oct 21, 2:35 AM CDTFrost AdvisoryMRX29 hr
Nov 5, 10:30 PM CSTTornado WatchSPC7 hr
Nov 6, 1:40 AM CSTMesoscale DiscussionSPC65 min
Nov 6, 2:27 AM CSTSevere Thunderstorm WarningMRX48 min
Nov 8, 10:04 AM CSTFreeze WarningMRX47 hr
Nov 10, 11:35 AM CSTFreeze WarningMRX21 hr
Dec 17, 3:45 AM CSTDense Fog AdvisoryMRX5 hr
Dec 26, 3:02 AM CSTWind AdvisoryMRX57 hr
Dec 26, 2:42 PM CSTFlash Flood WatchMRX48 hr
Dec 28, 3:51 AM CSTAreal Flood AdvisoryMRX5 hr
Dec 28, 9:01 AM CSTRiver Flood WarningMRX46 hr
Dec 28, 8:57 PM CSTDense Fog AdvisoryMRX10 hr
Dec 31, 4:22 PM CSTSpecial Weather StatementMRX53 min

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.