Alert archive / Tennessee / Union County

Weather alerts in Union County, Tennessee, 2013

89 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Union County and its neighbors

Each county as a circle sized by its count in 2013. Tap one for its archive.

Alerts
89
Warnings
23
Watches
16
Advisories
35
Busiest month
January21 alerts
Busiest day
January 30, 20137 alerts

Over time

By month

Warning verification

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

Union County, 2013

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings131115%3100%33 min
Flash flood warnings00

Each office's whole area, 2013

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Morristown, TN: tornado warnings8275%250%38 min
NWS Morristown, TN: severe thunderstorm warnings15310531%16183%22 min
NWS Morristown, TN: flash flood warnings241633%2696%45 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 13, 3:24 PM ESTFlood WatchMRX4 days
Jan 15, 4:12 AM ESTAreal Flood AdvisoryMRX5 hr
Jan 15, 9:24 AM ESTAreal Flood AdvisoryMRX7 hr
Jan 15, 4:15 PM ESTAreal Flood WarningMRX14 hr
Jan 16, 4:01 AM ESTAreal Flood WarningMRX8 hr
Jan 16, 12:03 PM ESTAreal Flood AdvisoryMRX4 hr
Jan 16, 8:11 PM ESTWinter Storm WatchMRX8 hr
Jan 17, 4:09 AM ESTWinter Weather AdvisoryMRX17 hr
Jan 23, 4:03 PM ESTWinter Storm WatchMRX23 hr
Jan 24, 2:09 PM ESTFreezing Rain AdvisoryMRX29 hr
Jan 25, 6:40 AM ESTMesoscale DiscussionSPC5 hr
Jan 25, 7:06 AM ESTIce Storm WarningMRX8 hr
Jan 29, 11:45 AM ESTWind AdvisoryMRX28 hr
Jan 30, 5:51 AM ESTTornado WatchSPC7 hr
Jan 30, 7:38 AM ESTMesoscale DiscussionSPC97 min
Jan 30, 8:03 AM ESTSevere Thunderstorm WarningMRX57 min
Jan 30, 10:48 AM ESTAreal Flood AdvisoryMRX5 hr
Jan 30, 11:36 AM ESTFlood WatchMRX10 hr
Jan 30, 4:26 PM ESTAreal Flood AdvisoryMRX3 hr
Jan 30, 6:02 PM ESTAreal Flood WarningMRX6 hr
Jan 31, 4:05 AM ESTWinter Weather AdvisoryMRX29 hr
Mar 5, 3:28 PM ESTWind AdvisoryMRX21 hr
Mar 24, 3:45 PM EDTWind AdvisoryMRX28 hr
Mar 26, 3:01 AM EDTFreeze WatchMRX24 hr
Mar 26, 3:01 AM EDTFreeze WarningMRX31 hr
Mar 27, 3:28 AM EDTFreeze WatchMRX24 hr
Mar 27, 3:28 AM EDTFreeze WarningMRX31 hr
Mar 28, 3:40 AM EDTFreeze WarningMRX29 hr
Apr 1, 5:10 AM EDTDense Fog AdvisoryMRX4 hr
Apr 1, 3:21 PM EDTFreeze WatchMRX24 hr
Apr 2, 3:15 PM EDTFreeze WarningMRX18 hr
Apr 11, 6:06 PM EDTMesoscale DiscussionSPC84 min
Apr 11, 6:36 PM EDTTornado WatchSPC7 hr
Apr 11, 9:19 PM EDTMesoscale DiscussionSPC86 min
Apr 19, 2:52 AM EDTMesoscale DiscussionSPC83 min
Apr 19, 2:38 PM EDTFrost AdvisoryMRX18 hr
May 9, 5:16 AM EDTDense Fog AdvisoryMRX5 hr
May 12, 2:42 PM EDTFrost AdvisoryMRX18 hr
May 16, 6:56 PM EDTAreal Flood AdvisoryMRX109 min
May 20, 4:28 AM EDTDense Fog AdvisoryMRX6 hr
May 21, 3:12 PM EDTMesoscale DiscussionSPC63 min
May 21, 3:26 PM EDTSevere Thunderstorm WatchSPC7 hr
May 21, 7:00 PM EDTMesoscale DiscussionSPC60 min
Jun 9, 12:23 PM EDTMesoscale DiscussionSPC97 min
Jun 10, 2:32 PM EDTMesoscale DiscussionSPC88 min
Jun 10, 3:02 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 10, 6:27 PM EDTMesoscale DiscussionSPC93 min
Jun 13, 1:19 PM EDTMesoscale DiscussionSPC26 min
Jun 13, 1:40 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 13, 2:34 PM EDTSevere Thunderstorm WarningMRX41 min
Jun 13, 3:10 PM EDTSevere Thunderstorm WarningMRX65 min
Jun 26, 10:55 PM EDTSevere Thunderstorm WatchSPC5 hr
Jun 27, 12:18 AM EDTSevere Thunderstorm WarningMRX57 min
Jun 27, 12:56 AM EDTMesoscale DiscussionSPC94 min
Jun 27, 1:13 AM EDTSevere Thunderstorm WarningMRX47 min
Jun 27, 2:01 AM EDTSevere Thunderstorm WarningMRX44 min
Jun 27, 2:05 AM EDTSevere Thunderstorm WarningMRX40 min
Jul 1, 12:56 PM EDTMesoscale DiscussionSPC2 hr
Jul 2, 4:27 AM EDTFlood WatchMRX6 days
Jul 6, 6:02 PM EDTAreal Flood AdvisoryMRX3 hr
Jul 6, 9:02 PM EDTAreal Flood AdvisoryMRX4 hr
Jul 7, 12:49 AM EDTAreal Flood AdvisoryMRX3 hr
Jul 7, 3:46 AM EDTAreal Flood AdvisoryMRX3 hr
Jul 7, 6:35 AM EDTAreal Flood AdvisoryMRX4 hr
Jul 7, 10:37 AM EDTAreal Flood AdvisoryMRX3 hr
Jul 10, 3:18 PM EDTSevere Thunderstorm WarningMRX57 min
Jul 10, 6:33 PM EDTSevere Thunderstorm WarningMRX27 min
Jul 13, 12:53 PM EDTMesoscale DiscussionSPC2 hr
Jul 22, 5:21 PM EDTAreal Flood AdvisoryMRX54 min
Jul 23, 4:44 PM EDTAreal Flood AdvisoryMRX2 hr
Jul 23, 5:32 PM EDTAreal Flood AdvisoryMRX118 min
Aug 21, 1:26 PM EDTMesoscale DiscussionSPC3 hr
Aug 22, 4:46 AM EDTDense Fog AdvisoryMRX5 hr
Aug 31, 9:18 PM EDTSevere Thunderstorm WarningMRX27 min
Aug 31, 9:45 PM EDTSevere Thunderstorm WarningMRX45 min
Sep 6, 6:23 AM EDTDense Fog AdvisoryMRX7 min
Sep 6, 6:30 AM EDTDense Fog AdvisoryMRX3 hr
Sep 12, 6:43 PM EDTSevere Thunderstorm WarningMRX47 min
Sep 12, 7:12 PM EDTSevere Thunderstorm WarningMRX48 min
Oct 17, 10:23 PM EDTDense Fog AdvisoryMRX12 hr
Oct 20, 9:11 PM EDTFrost AdvisoryMRX12 hr
Oct 23, 3:46 AM EDTFrost AdvisoryMRX28 hr
Oct 24, 3:54 AM EDTFreeze WarningMRX30 hr
Oct 25, 10:16 AM EDTFreeze WarningMRX24 hr
Oct 31, 3:00 AM EDTWind AdvisoryMRX28 hr
Nov 17, 7:58 PM ESTSevere Thunderstorm WatchSPC5 hr
Nov 26, 3:37 AM ESTWinter Weather AdvisoryMRX30 hr
Dec 9, 4:09 PM ESTWinter Weather AdvisoryMRX19 hr
Dec 21, 11:38 PM ESTSevere Thunderstorm WatchSPC6 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 archive20122014

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.