Alert archive / Mississippi / Grenada County

Weather alerts in Grenada County, Mississippi, 2019

108 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Grenada County and its neighbors

Each county as a circle sized by its count in 2019. Tap one for its archive.

Alerts
108
Warnings
28
Watches
24
Advisories
21
Busiest month
February18 alerts
Busiest day
February 22, 201911 alerts

Over time

By month

Warning verification

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

Grenada County, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings7443%367%26 min
Flash flood warnings11109%13100%85 min

Each office's whole area, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Jackson, MS: tornado warnings1225059%18484%23 min
NWS Jackson, MS: severe thunderstorm warnings40424639%71174%26 min
NWS Jackson, MS: flash flood warnings1177833%27881%88 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, 2:02 PM CSTDense Fog AdvisoryJAN17 hr
Jan 17, 9:10 PM CSTDense Fog AdvisoryJAN12 hr
Jan 27, 3:51 PM CSTWinter Storm WatchJAN12 hr
Jan 28, 3:51 AM CSTWinter Weather AdvisoryJAN27 hr
Feb 3, 4:03 AM CSTDense Fog AdvisoryJAN6 hr
Feb 18, 3:55 PM CSTFlash Flood WatchJAN50 hr
Feb 20, 6:42 AM CSTFlash Flood WarningJAN3 hr
Feb 20, 9:20 AM CSTFlash Flood WarningJAN4 hr
Feb 20, 4:52 PM CSTFlash Flood WatchJAN3 days
Feb 21, 7:26 PM CSTFlash Flood WarningJAN6 hr
Feb 22, 2:50 AM CSTSpecial Weather StatementJAN25 min
Feb 22, 3:16 AM CSTFlash Flood WarningJAN3 hr
Feb 22, 6:13 AM CSTFlash Flood Warning EmergencyJAN3 hr
Feb 22, 8:23 AM CSTFlash Flood WarningJAN6 hr
Feb 22, 9:18 AM CSTFlash Flood Warning EmergencyJAN4 hr
Feb 22, 1:16 PM CSTFlash Flood WarningJAN3 hr
Feb 22, 2:19 PM CSTAreal Flood WarningJAN21 hr
Feb 22, 3:20 PM CSTWind AdvisoryJAN33 hr
Feb 22, 5:11 PM CSTFlash Flood WarningJAN5 hr
Feb 22, 5:52 PM CSTMesoscale DiscussionSPC113 min
Feb 23, 10:52 AM CSTMesoscale DiscussionSPC113 min
Feb 23, 12:26 PM CSTTornado WatchSPC8 hr
Mar 3, 2:52 PM CSTFreeze WarningJAN21 hr
Mar 4, 3:50 AM CSTFreeze WarningJAN30 hr
Mar 5, 3:10 AM CSTFreeze WarningJAN31 hr
Mar 6, 1:48 PM CSTFreeze WarningJAN18 hr
Mar 9, 10:32 AM CSTTornado WatchSPC8 hr
Mar 9, 1:27 PM CSTMesoscale DiscussionSPC2 hr
Mar 9, 1:58 PM CSTTornado WatchSPC5 hr
Mar 9, 3:22 PM CSTSpecial Weather StatementJAN38 min
Mar 9, 3:44 PM CSTSevere Thunderstorm WarningJAN46 min
Mar 12, 2:56 PM CDTFlash Flood WatchJAN44 hr
Mar 12, 3:25 PM CDTWind AdvisoryJAN49 hr
Mar 14, 7:14 AM CDTMesoscale DiscussionSPC2 hr
Mar 14, 10:32 AM CDTMesoscale DiscussionSPC58 min
Mar 30, 3:52 PM CDTMesoscale DiscussionSPC83 min
Mar 30, 6:48 PM CDTSpecial Weather StatementJAN27 min
Apr 7, 10:45 AM CDTMesoscale DiscussionSPC60 min
Apr 7, 11:25 AM CDTSpecial Weather StatementJAN50 min
Apr 7, 1:13 PM CDTMesoscale DiscussionSPC2 hr
Apr 7, 2:57 PM CDTFlash Flood WatchJAN26 hr
Apr 7, 3:41 PM CDTSevere Thunderstorm WatchSPC6 hr
Apr 8, 4:05 PM CDTMesoscale DiscussionSPC2 hr
Apr 13, 3:19 AM CDTWind AdvisoryJAN19 hr
Apr 13, 2:20 PM CDTTornado WatchSPC10 hr
Apr 13, 9:07 PM CDTFlash Flood WarningJAN3 hr
Apr 13, 9:13 PM CDTMesoscale DiscussionSPC92 min
Apr 17, 2:59 PM CDTFlash Flood WatchJAN28 hr
Apr 25, 2:43 AM CDTSevere Thunderstorm WatchSPC6 hr
Apr 25, 5:02 AM CDTMesoscale DiscussionSPC58 min
Apr 25, 5:14 AM CDTSevere Thunderstorm WarningJAN61 min
May 8, 3:49 AM CDTFlash Flood WatchJAN4 days
May 8, 6:45 PM CDTTornado WatchSPC5 hr
May 8, 8:56 PM CDTSevere Thunderstorm WarningJAN79 min
May 8, 9:28 PM CDTMesoscale DiscussionSPC62 min
May 9, 6:34 AM CDTFlash Flood WarningJAN3 hr
Jun 6, 6:24 PM CDTSpecial Weather StatementJAN36 min
Jun 16, 11:53 AM CDTMesoscale DiscussionSPC2 hr
Jun 16, 12:37 PM CDTSpecial Weather StatementJAN23 min
Jun 17, 1:57 PM CDTMesoscale DiscussionSPC63 min
Jun 19, 8:03 PM CDTMesoscale DiscussionSPC57 min
Jun 19, 9:58 PM CDTMesoscale DiscussionSPC62 min
Jun 19, 10:24 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 19, 11:16 PM CDTSevere Thunderstorm WarningJAN59 min
Jun 21, 3:33 AM CDTHeat AdvisoryJAN15 hr
Jun 23, 4:58 PM CDTMesoscale DiscussionSPC92 min
Jun 24, 3:57 AM CDTSevere Thunderstorm WarningJAN63 min
Jun 27, 10:02 AM CDTMesoscale DiscussionSPC118 min
Jun 27, 12:52 PM CDTSpecial Weather StatementJAN38 min
Jul 8, 3:43 PM CDTHeat AdvisoryJAN27 hr
Jul 9, 3:07 PM CDTHeat AdvisoryJAN28 hr
Jul 10, 3:40 PM CDTHeat AdvisoryJAN27 hr
Jul 11, 2:22 PM CDTFlash Flood WatchJAN4 days
Jul 15, 10:52 AM CDTSpecial Weather StatementJAN23 min
Aug 4, 2:48 PM CDTSpecial Weather StatementJAN27 min
Aug 4, 3:24 PM CDTSpecial Weather StatementJAN51 min
Aug 6, 3:01 PM CDTHeat AdvisoryJAN28 hr
Aug 7, 3:33 PM CDTHeat AdvisoryJAN51 hr
Aug 9, 6:18 PM CDTSpecial Weather StatementJAN42 min
Aug 10, 3:50 AM CDTHeat AdvisoryJAN71 hr
Aug 11, 3:57 AM CDTExcessive Heat WarningJAN64 hr
Aug 18, 2:56 PM CDTSpecial Weather StatementJAN49 min
Aug 19, 2:44 PM CDTHeat AdvisoryJAN29 hr
Aug 21, 3:40 AM CDTHeat AdvisoryJAN15 hr
Oct 9, 5:32 AM CDTDense Fog AdvisoryJAN3 hr
Oct 21, 4:57 AM CDTMesoscale DiscussionSPC63 min
Oct 21, 5:30 AM CDTSevere Thunderstorm WatchSPC4 hr
Oct 21, 8:32 AM CDTSevere Thunderstorm WarningJAN43 min
Oct 24, 2:53 PM CDTFlash Flood WatchJAN46 hr
Oct 26, 5:04 AM CDTWind AdvisoryJAN8 hr
Oct 31, 4:52 AM CDTFreeze WarningJAN27 hr
Nov 1, 2:58 PM CDTFreeze WarningJAN18 hr
Nov 7, 2:17 PM CSTFreeze WatchJAN13 hr
Nov 8, 3:32 AM CSTFreeze WarningJAN28 hr
Nov 11, 3:36 AM CSTFreeze WatchJAN7 hr
Nov 11, 3:36 AM CSTFreeze WarningJAN54 hr
Nov 11, 3:36 AM CSTWind AdvisoryJAN38 hr
Nov 26, 3:42 PM CSTTornado WatchSPC6 hr
Nov 26, 9:43 PM CSTMesoscale DiscussionSPC92 min
Nov 30, 3:54 PM CSTTornado WatchSPC7 hr
Nov 30, 6:53 PM CSTMesoscale DiscussionSPC2 hr
Nov 30, 9:16 PM CSTMesoscale DiscussionSPC119 min
Dec 7, 9:33 PM CSTDense Fog AdvisoryJAN11 hr
Dec 13, 9:40 PM CSTDense Fog AdvisoryJAN11 hr
Dec 16, 10:40 AM CSTTornado WatchSPC9 hr
Dec 16, 1:52 PM CSTMesoscale DiscussionSPC83 min
Dec 16, 2:30 PM CSTSevere Thunderstorm WarningJAN75 min
Dec 29, 2:56 PM CSTTornado 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 archive20182020

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.