Alert archive / Mississippi / Jefferson County

Weather alerts in Jefferson County, Mississippi, 2016

119 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Jefferson County and its neighbors

Each county as a circle sized by its count in 2016. Tap one for its archive.

Alerts
119
Warnings
36
Watches
18
Advisories
23
Busiest month
March33 alerts
Busiest day
March 17, 201612 alerts

Over time

By month

Warning verification

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

2 of 5 tornado warnings covering Jefferson County in 2016 had a tornado report inside them.

Jefferson County, 2016

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings5260%0
Severe thunderstorm warnings171229%11100%19 min
Flash flood warnings7357%0

Each office's whole area, 2016

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Jackson, MS: tornado warnings752863%8789%20 min
NWS Jackson, MS: severe thunderstorm warnings45327839%76080%23 min
NWS Jackson, MS: flash flood warnings1409135%28288%186 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 8, 5:53 AM CSTDense Fog AdvisoryJAN4 hr
Jan 21, 8:11 AM CSTSevere Thunderstorm WarningJAN24 min
Jan 21, 1:44 PM CSTMesoscale DiscussionSPC2 hr
Jan 21, 2:14 PM CSTTornado WatchSPC6 hr
Jan 21, 3:21 PM CSTTornado WarningJAN54 min
Jan 21, 3:59 PM CSTTornado WarningJAN61 min
Jan 21, 4:17 PM CSTTornado WarningJAN42 min
Jan 21, 5:03 PM CSTFlash Flood WarningJAN2 hr
Feb 2, 10:41 AM CSTMesoscale DiscussionSPC2 hr
Feb 2, 1:18 PM CSTTornado WatchSPC6 hr
Feb 2, 5:18 PM CSTMesoscale DiscussionSPC117 min
Feb 2, 6:27 PM CSTFlash Flood WarningJAN4 hr
Feb 2, 11:17 PM CSTAreal Flood WarningJAN18 hr
Feb 8, 2:52 AM CSTWind AdvisoryJAN15 hr
Feb 9, 3:08 AM CSTWind AdvisoryJAN15 hr
Feb 15, 7:41 AM CSTMesoscale DiscussionSPC3 hr
Feb 15, 9:30 AM CSTTornado WatchSPC8 hr
Feb 15, 10:56 AM CSTSevere Thunderstorm WarningJAN64 min
Feb 15, 11:10 AM CSTTornado WarningJAN38 min
Feb 15, 1:05 PM CSTSevere Thunderstorm WarningJAN58 min
Feb 22, 3:55 PM CSTWind AdvisoryJAN47 hr
Feb 23, 1:15 PM CSTMesoscale DiscussionSPC2 hr
Feb 23, 2:20 PM CSTTornado WatchSPC6 hr
Feb 23, 8:12 PM CSTSevere Thunderstorm WarningJAN62 min
Mar 1, 4:51 PM CSTMesoscale DiscussionSPC114 min
Mar 8, 11:30 PM CSTFlash Flood WatchJAN4 days
Mar 9, 9:54 AM CSTWind AdvisoryJAN6 hr
Mar 9, 11:00 AM CSTRiver Flood AdvisoryJAN36 hr
Mar 10, 9:50 AM CSTSpecial Weather StatementJAN40 min
Mar 10, 10:06 AM CSTSevere Thunderstorm WarningJAN54 min
Mar 10, 11:38 AM CSTRiver Flood WarningJAN4 days
Mar 10, 1:32 PM CSTFlash Flood WarningJAN6 hr
Mar 11, 7:04 AM CSTFlash Flood WarningJAN6 hr
Mar 12, 8:29 AM CSTAreal Flood WarningJAN9 hr
Mar 12, 3:47 PM CSTFlash Flood WarningJAN5 hr
Mar 12, 4:31 PM CSTFlash Flood WarningJAN5 hr
Mar 14, 11:38 AM CDTRiver Flood AdvisoryJAN36 hr
Mar 16, 11:13 AM CDTRiver Flood AdvisoryJAN36 hr
Mar 17, 10:50 AM CDTRiver Flood WarningJAN5 days
Mar 17, 12:58 PM CDTMesoscale DiscussionSPC92 min
Mar 17, 1:01 PM CDTSpecial Weather StatementJAN14 min
Mar 17, 1:05 PM CDTSevere Thunderstorm WarningJAN40 min
Mar 17, 1:19 PM CDTSevere Thunderstorm WatchSPC9 hr
Mar 17, 1:45 PM CDTSevere Thunderstorm WarningJAN60 min
Mar 17, 2:50 PM CDTSpecial Weather StatementJAN40 min
Mar 17, 3:07 PM CDTSevere Thunderstorm WarningJAN53 min
Mar 17, 3:24 PM CDTSevere Thunderstorm WarningJAN51 min
Mar 17, 3:47 PM CDTSevere Thunderstorm WarningJAN58 min
Mar 17, 3:48 PM CDTMesoscale DiscussionSPC87 min
Mar 17, 6:22 PM CDTMesoscale DiscussionSPC53 min
Mar 18, 4:35 PM CDTFlash Flood WarningJAN3 hr
Mar 29, 1:52 PM CDTFlash Flood WatchJAN63 hr
Mar 30, 7:20 PM CDTSevere Thunderstorm WarningJAN40 min
Mar 30, 10:00 PM CDTTornado WatchSPC6 hr
Mar 30, 11:30 PM CDTMesoscale DiscussionSPC60 min
Mar 31, 1:30 PM CDTMesoscale DiscussionSPC2 hr
Mar 31, 2:35 PM CDTTornado WatchSPC7 hr
Apr 9, 1:41 PM CDTWind AdvisoryJAN31 hr
Apr 11, 12:15 PM CDTMesoscale DiscussionSPC3 hr
Apr 11, 1:05 PM CDTSevere Thunderstorm WatchSPC6 hr
Apr 11, 3:42 PM CDTMesoscale DiscussionSPC93 min
Apr 11, 6:09 PM CDTMesoscale DiscussionSPC66 min
Apr 11, 6:58 PM CDTSevere Thunderstorm WatchSPC5 hr
Apr 14, 1:44 PM CDTSpecial Weather StatementJAN46 min
Apr 14, 2:00 PM CDTSevere Thunderstorm WarningJAN27 min
Apr 27, 7:54 AM CDTSevere Thunderstorm WatchSPC7 hr
Apr 29, 4:06 PM CDTFlash Flood WatchJAN24 hr
May 12, 2:33 PM CDTMesoscale DiscussionSPC87 min
May 18, 3:10 AM CDTDense Fog AdvisoryJAN6 hr
May 27, 4:03 PM CDTMesoscale DiscussionSPC117 min
May 30, 4:18 PM CDTSpecial Weather StatementJAN27 min
Jun 3, 12:45 PM CDTMesoscale DiscussionSPC3 hr
Jun 14, 3:33 PM CDTHeat AdvisoryJAN3 days
Jun 18, 7:17 AM CDTSpecial Weather StatementJAN28 min
Jul 3, 3:27 PM CDTHeat AdvisoryJAN28 hr
Jul 4, 1:54 PM CDTSpecial Weather StatementJAN51 min
Jul 5, 3:14 PM CDTHeat AdvisoryJAN3 days
Jul 11, 4:52 PM CDTSpecial Weather StatementJAN38 min
Jul 13, 5:32 PM CDTSpecial Weather StatementJAN28 min
Jul 14, 7:08 PM CDTSevere Thunderstorm WatchSPC4 hr
Jul 14, 10:15 PM CDTSevere Thunderstorm WarningJAN29 min
Jul 14, 10:40 PM CDTMesoscale DiscussionSPC2 hr
Jul 16, 5:54 PM CDTSpecial Weather StatementJAN36 min
Jul 18, 4:02 AM CDTHeat AdvisoryJAN6 days
Jul 22, 4:55 PM CDTSevere Thunderstorm WarningJAN50 min
Jul 22, 5:26 PM CDTSevere Thunderstorm WarningJAN49 min
Aug 2, 2:35 PM CDTHeat AdvisoryJAN4 days
Aug 11, 3:59 AM CDTFlash Flood WatchJAN3 days
Aug 16, 4:51 PM CDTSpecial Weather StatementJAN24 min
Aug 16, 5:19 PM CDTSpecial Weather StatementJAN26 min
Aug 23, 2:54 PM CDTHeat AdvisoryJAN28 hr
Nov 3, 5:16 AM CDTDense Fog AdvisoryJAN5 hr
Nov 19, 3:43 AM CSTFreeze WarningJAN28 hr
Nov 19, 4:55 AM CSTRed Flag WarningJAN13 hr
Nov 20, 4:00 AM CSTFreeze WarningJAN29 hr
Nov 24, 5:03 AM CSTDense Fog AdvisoryJAN4 hr
Nov 25, 4:58 AM CSTDense Fog AdvisoryJAN4 hr
Nov 27, 1:04 PM CSTWind AdvisoryJAN30 hr
Nov 28, 2:23 PM CSTMesoscale DiscussionSPC2 hr
Nov 28, 2:49 PM CSTTornado WatchSPC6 hr
Nov 28, 3:20 PM CSTSevere Thunderstorm WarningJAN17 min
Nov 29, 12:38 PM CSTMesoscale DiscussionSPC2 hr
Nov 29, 1:31 PM CSTSevere Thunderstorm WarningJAN44 min
Nov 29, 1:48 PM CSTTornado WatchSPC7 hr
Nov 29, 4:20 PM CSTMesoscale DiscussionSPC55 min
Nov 29, 6:06 PM CSTMesoscale DiscussionSPC114 min
Nov 29, 8:03 PM CSTMesoscale DiscussionSPC2 hr
Nov 29, 8:50 PM CSTTornado WatchSPC8 hr
Nov 29, 9:47 PM CSTMesoscale DiscussionSPC58 min
Nov 29, 9:55 PM CSTTornado WarningJAN41 min
Nov 29, 11:37 PM CSTMesoscale DiscussionSPC113 min
Nov 30, 1:04 AM CSTSpecial Weather StatementJAN56 min
Dec 13, 2:24 AM CSTDense Fog AdvisoryJAN7 hr
Dec 13, 9:24 AM CSTSpecial Weather StatementJAN51 min
Dec 17, 11:48 PM CSTMesoscale DiscussionSPC87 min
Dec 18, 1:05 AM CSTSpecial Weather StatementJAN55 min
Dec 23, 2:31 PM CSTDense Fog AdvisoryJAN19 hr
Dec 24, 5:39 PM CSTDense Fog AdvisoryJAN15 hr
Dec 29, 1:35 AM CSTMesoscale DiscussionSPC115 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 archive20152017

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.