Alert archive / Tennessee / Benton County

Weather alerts in Benton County, Tennessee, 2009

124 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Benton County and its neighbors

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts
124
Warnings
29
Watches
33
Advisories
24
Busiest month
April21 alerts
Busiest day
April 10, 20099 alerts

Over time

By month

Warning verification

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

1 of 3 tornado warnings covering Benton County in 2009 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 20 minutes after it went out.

Benton County, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings3167%1100%20 min
Severe thunderstorm warnings15660%650%18 min
Flash flood warnings4175%1100%123 min

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Nashville, TN: tornado warnings1061883%3485%15 min
NWS Nashville, TN: severe thunderstorm warnings3298474%22759%20 min
NWS Nashville, TN: flash flood warnings782371%4470%85 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 5, 11:28 AM CSTWinter Weather AdvisoryOHX16 hr
Jan 26, 4:00 AM CSTIce Storm WarningOHX32 hr
Jan 27, 8:40 AM CSTAreal Flood AdvisoryOHX24 hr
Jan 27, 3:08 PM CSTWinter Weather AdvisoryOHX20 hr
Jan 27, 11:31 PM CSTMesoscale DiscussionSPC5 hr
Feb 10, 3:58 PM CSTWind AdvisoryOHX28 hr
Feb 28, 4:43 AM CSTWinter Weather AdvisoryOHX25 hr
Mar 8, 6:32 PM CDTMesoscale DiscussionSPC58 min
Mar 11, 3:34 AM CDTWinter Storm WatchOHX13 hr
Mar 11, 4:11 PM CDTWinter Weather AdvisoryOHX34 hr
Mar 17, 1:03 AM CDTDense Fog AdvisoryOHX8 hr
Mar 28, 12:58 PM CDTMesoscale DiscussionSPC92 min
Mar 28, 2:23 PM CDTTornado WatchSPC7 hr
Mar 28, 3:35 PM CDTSevere Thunderstorm WarningOHX10 min
Apr 2, 2:40 PM CDTTornado WatchSPC4 hr
Apr 2, 6:02 PM CDTTornado WatchSPC7 hr
Apr 5, 10:31 PM CDTFreeze WatchOHX5 hr
Apr 5, 10:31 PM CDTFreeze WatchOHX5 hr
Apr 6, 3:56 AM CDTFreeze WarningOHX29 hr
Apr 6, 3:56 AM CDTFreeze WarningOHX51 hr
Apr 10, 12:50 AM CDTMesoscale DiscussionSPC85 min
Apr 10, 1:22 AM CDTSevere Thunderstorm WatchSPC4 hr
Apr 10, 8:22 AM CDTMesoscale DiscussionSPC83 min
Apr 10, 8:53 AM CDTTornado WatchSPC7 hr
Apr 10, 10:20 AM CDTTornado WarningOHX55 min
Apr 10, 10:45 AM CDTTornado WarningOHX30 min
Apr 10, 10:54 AM CDTAreal Flood AdvisoryOHX3 hr
Apr 10, 11:06 AM CDTSevere Thunderstorm WarningOHX24 min
Apr 10, 11:14 AM CDTMesoscale DiscussionSPC76 min
Apr 13, 12:09 PM CDTMesoscale DiscussionSPC66 min
Apr 13, 12:58 PM CDTTornado WatchSPC7 hr
Apr 19, 2:22 PM CDTMesoscale DiscussionSPC53 min
Apr 19, 3:49 PM CDTMesoscale DiscussionSPC56 min
Apr 19, 5:47 PM CDTMesoscale DiscussionSPC58 min
Apr 30, 3:34 PM CDTMesoscale DiscussionSPC86 min
May 1, 1:18 PM CDTMesoscale DiscussionSPC87 min
May 1, 1:22 PM CDTAreal Flood AdvisoryOHX3 hr
May 1, 4:27 PM CDTFlash Flood WatchOHX8 hr
May 1, 4:42 PM CDTSevere Thunderstorm WarningOHX33 min
May 1, 5:03 PM CDTFlash Flood WarningOHX5 hr
May 2, 2:46 AM CDTFlash Flood WarningOHX4 hr
May 2, 3:17 AM CDTFlood WatchOHX48 hr
May 5, 3:10 PM CDTFlood WatchOHX23 hr
May 8, 4:29 AM CDTSevere Thunderstorm WatchSPC3 hr
May 8, 8:37 AM CDTMesoscale DiscussionSPC53 min
May 8, 9:21 AM CDTTornado WatchSPC7 hr
May 8, 11:30 AM CDTFlash Flood WatchOHX37 hr
May 8, 2:16 PM CDTMesoscale DiscussionSPC89 min
May 8, 3:24 PM CDTMesoscale DiscussionSPC66 min
May 8, 3:42 PM CDTTornado WatchSPC7 hr
May 8, 7:30 PM CDTMesoscale DiscussionSPC90 min
May 8, 10:04 PM CDTMesoscale DiscussionSPC86 min
May 9, 2:22 AM CDTMesoscale DiscussionSPC53 min
May 18, 2:35 PM CDTFrost AdvisoryOHX18 hr
May 27, 9:44 AM CDTSevere Thunderstorm WarningOHX31 min
Jun 10, 5:20 AM CDTMesoscale DiscussionSPC55 min
Jun 11, 8:40 AM CDTSevere Thunderstorm WatchSPC5 hr
Jun 11, 6:02 PM CDTMesoscale DiscussionSPC58 min
Jun 11, 7:47 PM CDTMesoscale DiscussionSPC58 min
Jun 11, 8:18 PM CDTTornado WatchSPC4 hr
Jun 15, 9:59 AM CDTMesoscale DiscussionSPC31 min
Jun 15, 10:34 AM CDTSevere Thunderstorm WatchSPC7 hr
Jun 15, 1:56 PM CDTMesoscale DiscussionSPC64 min
Jun 15, 2:48 PM CDTTornado WatchSPC3 hr
Jun 15, 3:52 PM CDTMesoscale DiscussionSPC53 min
Jun 16, 9:38 AM CDTMesoscale DiscussionSPC67 min
Jun 16, 10:40 AM CDTSevere Thunderstorm WatchSPC5 hr
Jun 16, 12:40 PM CDTSevere Thunderstorm WarningOHX50 min
Jun 16, 1:10 PM CDTMesoscale DiscussionSPC35 min
Jun 16, 1:14 PM CDTSevere Thunderstorm WarningOHX46 min
Jun 26, 2:34 PM CDTMesoscale DiscussionSPC86 min
Jun 26, 6:13 PM CDTSevere Thunderstorm WarningOHX32 min
Jun 27, 4:04 AM CDTHeat AdvisoryOHX16 hr
Jul 4, 5:27 PM CDTMesoscale DiscussionSPC63 min
Jul 4, 5:56 PM CDTSevere Thunderstorm WatchSPC3 hr
Jul 4, 8:02 PM CDTMesoscale DiscussionSPC28 min
Jul 4, 11:03 PM CDTAreal Flood AdvisoryOHX3 hr
Jul 5, 1:21 PM CDTMesoscale DiscussionSPC54 min
Jul 15, 1:36 PM CDTMesoscale DiscussionSPC84 min
Jul 15, 5:33 PM CDTSevere Thunderstorm WarningOHX42 min
Jul 15, 5:52 PM CDTFlash Flood WarningOHX3 hr
Jul 15, 6:29 PM CDTSevere Thunderstorm WarningOHX31 min
Jul 15, 7:10 PM CDTSevere Thunderstorm WarningOHX35 min
Jul 15, 7:49 PM CDTMesoscale DiscussionSPC56 min
Jul 15, 7:54 PM CDTSevere Thunderstorm WarningOHX21 min
Jul 15, 9:04 PM CDTFlash Flood WarningOHX2 hr
Jul 30, 2:48 PM CDTFlood WatchOHX13 hr
Jul 30, 4:10 PM CDTTornado WatchSPC6 hr
Jul 30, 5:01 PM CDTMesoscale DiscussionSPC59 min
Jul 30, 6:29 PM CDTMesoscale DiscussionSPC61 min
Jul 30, 8:34 PM CDTTornado WarningOHX26 min
Aug 1, 2:35 PM CDTFlash Flood WatchOHX13 hr
Aug 4, 6:21 PM CDTMesoscale DiscussionSPC114 min
Aug 4, 6:34 PM CDTSevere Thunderstorm WatchSPC4 hr
Aug 4, 7:09 PM CDTSevere Thunderstorm WarningOHX51 min
Aug 4, 7:38 PM CDTSevere Thunderstorm WarningOHX52 min
Aug 4, 8:21 PM CDTSevere Thunderstorm WarningOHX39 min
Aug 4, 8:35 PM CDTMesoscale DiscussionSPC85 min
Aug 4, 9:36 PM CDTMesoscale DiscussionSPC2 hr
Aug 4, 9:51 PM CDTAreal Flood AdvisoryOHX4 hr
Aug 12, 3:47 AM CDTDense Fog AdvisoryOHX3 hr
Sep 7, 4:16 PM CDTSevere Thunderstorm WarningOHX19 min
Sep 16, 10:22 AM CDTAreal Flood AdvisoryOHX6 hr
Sep 16, 3:36 PM CDTFlood WatchOHX51 hr
Sep 19, 2:39 AM CDTFlood WatchOHX45 hr
Sep 23, 3:20 AM CDTFlash Flood WatchOHX16 hr
Oct 9, 2:38 AM CDTMesoscale DiscussionSPC52 min
Oct 17, 3:59 AM CDTFrost AdvisoryOHX28 hr
Oct 17, 3:59 AM CDTFreeze WatchOHX24 hr
Oct 18, 3:33 AM CDTFreeze WarningOHX29 hr
Oct 24, 11:01 AM CDTFrost AdvisoryOHX21 hr
Oct 29, 4:05 AM CDTDense Fog AdvisoryOHX4 hr
Nov 1, 3:04 AM CSTFrost AdvisoryOHX28 hr
Nov 2, 3:40 AM CSTFreeze WatchOHX31 hr
Nov 3, 10:43 AM CSTFreeze WarningOHX19 hr
Nov 4, 3:32 PM CSTFreeze WatchOHX24 hr
Nov 5, 3:16 PM CSTFreeze WarningOHX16 hr
Nov 19, 2:56 PM CSTFrost AdvisoryOHX16 hr
Nov 25, 3:39 PM CSTFreeze WatchOHX23 hr
Nov 26, 3:06 PM CSTFreeze WarningOHX17 hr
Dec 8, 11:47 AM CSTAreal Flood AdvisoryOHX12 hr
Dec 8, 11:47 AM CSTWind AdvisoryOHX26 hr
Dec 21, 10:39 PM CSTFreezing Fog AdvisoryOHX10 hr
Dec 23, 4:28 AM CSTWind AdvisoryOHX47 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 archive20082010

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.