Alert archive / Mississippi / Harrison County

Weather alerts in Harrison County, Mississippi, 2015

131 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Harrison County and its neighbors

Each county as a circle sized by its count in 2015. Tap one for its archive.

Alerts
131
Warnings
36
Watches
10
Advisories
8
Busiest month
April33 alerts
Busiest day
April 25, 20158 alerts

Over time

By month

Warning verification

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

0 of 1 tornado warnings covering Harrison County in 2015 had a tornado report inside them.

Harrison County, 2015

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings10730%1242%21 min
Flash flood warnings9367%580%59 min

Each office's whole area, 2015

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS New Orleans, LA: tornado warnings70987%3043%7 min
NWS New Orleans, LA: severe thunderstorm warnings1654970%14165%18 min
NWS New Orleans, LA: flash flood warnings351557%3494%69 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 3, 12:00 PM CSTMesoscale DiscussionSPC90 min
Jan 3, 11:47 PM CSTSpecial Weather StatementLIX58 min
Jan 23, 12:43 PM CSTRiver Flood WarningLIX65 hr
Feb 18, 11:35 AM CSTRed Flag WarningLIX6 hr
Mar 9, 5:45 PM CDTAreal Flood AdvisoryLIX2 hr
Mar 9, 7:34 PM CDTAreal Flood AdvisoryLIX56 min
Mar 9, 7:48 PM CDTMesoscale DiscussionSPC2 hr
Mar 10, 11:20 AM CDTRiver Flood WarningLIX45 hr
Mar 10, 2:56 PM CDTAreal Flood AdvisoryLIX3 hr
Mar 13, 1:08 AM CDTSpecial Weather StatementLIX22 min
Mar 13, 4:07 AM CDTAreal Flood AdvisoryLIX4 hr
Mar 13, 9:44 PM CDTRiver Flood WarningLIX15 hr
Mar 26, 11:19 AM CDTSpecial Weather StatementLIX41 min
Apr 6, 1:06 PM CDTMesoscale DiscussionSPC114 min
Apr 7, 5:48 AM CDTSpecial Weather StatementLIX72 min
Apr 10, 12:05 PM CDTMesoscale DiscussionSPC85 min
Apr 10, 3:38 PM CDTMesoscale DiscussionSPC97 min
Apr 12, 5:17 PM CDTSpecial Weather StatementLIX28 min
Apr 12, 6:20 PM CDTSpecial Weather StatementLIX25 min
Apr 12, 7:10 PM CDTAreal Flood AdvisoryLIX2 hr
Apr 12, 7:50 PM CDTFlash Flood WarningLIX4 hr
Apr 13, 7:59 AM CDTMesoscale DiscussionSPC2 hr
Apr 13, 11:52 AM CDTSpecial Weather StatementLIX53 min
Apr 13, 12:47 PM CDTSpecial Weather StatementLIX28 min
Apr 14, 7:54 AM CDTAreal Flood AdvisoryLIX2 hr
Apr 14, 9:51 AM CDTSpecial Weather StatementLIX54 min
Apr 14, 10:32 AM CDTSpecial Weather StatementLIX58 min
Apr 14, 10:39 AM CDTRiver Flood WarningLIX5 days
Apr 14, 10:41 AM CDTRiver Flood WarningLIX5 days
Apr 14, 10:45 AM CDTFlash Flood WarningLIX3 hr
Apr 14, 5:57 PM CDTRiver Flood WarningLIX37 hr
Apr 15, 1:04 PM CDTFlash Flood WarningLIX3 hr
Apr 15, 2:06 PM CDTFlash Flood WarningLIX3 hr
Apr 15, 3:46 PM CDTMesoscale DiscussionSPC89 min
Apr 19, 2:06 AM CDTMesoscale DiscussionSPC84 min
Apr 25, 9:35 AM CDTMesoscale DiscussionSPC115 min
Apr 25, 10:41 AM CDTSevere Thunderstorm WatchSPC7 hr
Apr 25, 1:11 PM CDTSevere Thunderstorm WarningLIX34 min
Apr 25, 1:35 PM CDTSpecial Weather StatementLIX40 min
Apr 25, 1:46 PM CDTSevere Thunderstorm WarningLIX44 min
Apr 25, 1:50 PM CDTMesoscale DiscussionSPC85 min
Apr 25, 2:11 PM CDTSevere Thunderstorm WarningLIX22 min
Apr 25, 2:29 PM CDTSevere Thunderstorm WarningLIX31 min
Apr 27, 6:01 AM CDTTornado WatchSPC7 hr
Apr 27, 9:47 AM CDTMesoscale DiscussionSPC88 min
Apr 27, 11:02 AM CDTSpecial Weather StatementLIX58 min
May 11, 12:30 PM CDTMesoscale DiscussionSPC2 hr
May 12, 1:07 PM CDTMesoscale DiscussionSPC113 min
May 16, 10:14 AM CDTSpecial Weather StatementLIX61 min
May 16, 12:44 PM CDTSpecial Weather StatementLIX46 min
May 16, 12:59 PM CDTAreal Flood AdvisoryLIX3 hr
May 16, 7:32 PM CDTAreal Flood AdvisoryLIX118 min
May 16, 8:03 PM CDTFlash Flood WarningLIX3 hr
May 16, 9:26 PM CDTRiver Flood WarningLIX65 hr
May 16, 9:26 PM CDTRiver Flood WarningLIX38 hr
May 16, 11:03 PM CDTFlash Flood WarningLIX8 hr
May 16, 11:52 PM CDTFlash Flood WarningLIX3 hr
May 17, 4:39 AM CDTRiver Flood WarningLIX51 hr
May 17, 10:38 AM CDTRiver Flood WarningLIX7 days
May 20, 2:26 PM CDTSpecial Weather StatementLIX34 min
May 20, 3:02 PM CDTSpecial Weather StatementLIX28 min
May 21, 4:24 PM CDTSpecial Weather StatementLIX36 min
May 21, 5:05 PM CDTFlash Flood WarningLIX115 min
May 21, 9:51 PM CDTRiver Flood WarningLIX34 hr
May 22, 8:22 AM CDTRiver Flood WarningLIX31 hr
May 24, 1:49 PM CDTTornado WatchSPC8 hr
May 24, 5:03 PM CDTMesoscale DiscussionSPC117 min
May 24, 6:59 PM CDTSpecial Weather StatementLIX31 min
May 24, 7:42 PM CDTMesoscale DiscussionSPC93 min
May 25, 2:38 AM CDTMesoscale DiscussionSPC3 hr
May 25, 12:19 PM CDTRiver Flood WarningLIX44 hr
May 25, 9:46 PM CDTSpecial Weather StatementLIX89 min
May 25, 10:37 PM CDTTornado WatchSPC6 hr
May 26, 3:50 AM CDTMesoscale DiscussionSPC85 min
May 27, 11:51 AM CDTMesoscale DiscussionSPC54 min
May 28, 2:58 PM CDTSpecial Weather StatementLIX47 min
Jun 12, 2:09 PM CDTSpecial Weather StatementLIX36 min
Jun 14, 12:49 PM CDTSpecial Weather StatementLIX41 min
Jun 21, 6:34 PM CDTSpecial Weather StatementLIX41 min
Jun 23, 2:13 PM CDTSpecial Weather StatementLIX62 min
Jun 23, 2:20 PM CDTSevere Thunderstorm WarningLIX25 min
Jun 24, 3:45 PM CDTSevere Thunderstorm WarningLIX45 min
Jun 29, 1:45 PM CDTSpecial Weather StatementLIX30 min
Jun 29, 2:42 PM CDTSpecial Weather StatementLIX33 min
Jun 30, 11:38 AM CDTMesoscale DiscussionSPC97 min
Jul 1, 3:11 PM CDTSpecial Weather StatementLIX64 min
Jul 5, 10:54 AM CDTSpecial Weather StatementLIX36 min
Jul 19, 4:52 PM CDTSpecial Weather StatementLIX53 min
Jul 20, 1:43 PM CDTSpecial Weather StatementLIX62 min
Jul 25, 2:14 PM CDTSpecial Weather StatementLIX46 min
Jul 26, 5:49 PM CDTSpecial Weather StatementLIX26 min
Jul 29, 3:36 PM CDTSpecial Weather StatementLIX69 min
Jul 29, 4:42 PM CDTSpecial Weather StatementLIX33 min
Jul 30, 5:30 PM CDTSpecial Weather StatementLIX30 min
Jul 30, 7:37 PM CDTSpecial Weather StatementLIX23 min
Jul 30, 8:02 PM CDTSpecial Weather StatementLIX43 min
Aug 8, 5:02 PM CDTSevere Thunderstorm WarningLIX58 min
Aug 8, 8:18 PM CDTSpecial Weather StatementLIX27 min
Aug 8, 8:50 PM CDTSevere Thunderstorm WarningLIX40 min
Aug 20, 2:38 PM CDTSpecial Weather StatementLIX37 min
Sep 5, 4:15 PM CDTSpecial Weather StatementLIX60 min
Sep 5, 5:11 PM CDTSevere Thunderstorm WarningLIX49 min
Sep 5, 5:54 PM CDTSevere Thunderstorm WarningLIX66 min
Sep 6, 3:12 PM CDTSpecial Weather StatementLIX33 min
Sep 10, 1:54 PM CDTFlash Flood WarningLIX3 hr
Sep 27, 5:58 PM CDTMesoscale DiscussionSPC3 hr
Oct 15, 2:48 PM CDTFire Weather WatchLIX3 days
Oct 25, 7:12 PM CDTTornado WatchSPC7 hr
Oct 25, 10:15 PM CDTMesoscale DiscussionSPC2 hr
Oct 26, 12:43 AM CDTSpecial Weather StatementLIX77 min
Oct 26, 1:32 AM CDTMesoscale DiscussionSPC118 min
Oct 26, 2:05 AM CDTTornado WatchSPC7 hr
Oct 31, 11:45 AM CDTTornado WatchSPC8 hr
Nov 18, 1:14 AM CSTMesoscale DiscussionSPC2 hr
Nov 18, 2:49 AM CSTTornado WatchSPC6 hr
Nov 18, 5:21 AM CSTMesoscale DiscussionSPC114 min
Nov 18, 5:39 AM CSTSpecial Weather StatementLIX66 min
Dec 13, 7:55 PM CSTSpecial Weather StatementLIX2 hr
Dec 13, 10:00 PM CSTSpecial Weather StatementLIX3 hr
Dec 13, 11:12 PM CSTSpecial Weather StatementLIX93 min
Dec 16, 4:50 PM CSTMesoscale DiscussionSPC2 hr
Dec 21, 5:47 PM CSTMesoscale DiscussionSPC118 min
Dec 21, 8:16 PM CSTSpecial Weather StatementLIX74 min
Dec 22, 4:47 PM CSTRiver Flood WarningLIX4 days
Dec 24, 8:55 AM CSTSpecial Weather StatementLIX65 min
Dec 25, 9:43 AM CSTRiver Flood WarningLIX20 hr
Dec 28, 2:03 AM CSTMesoscale DiscussionSPC117 min
Dec 28, 2:23 AM CSTTornado WatchSPC8 hr
Dec 28, 5:14 AM CSTMesoscale DiscussionSPC2 hr
Dec 28, 5:31 AM CSTSpecial Weather StatementLIX59 min
Dec 28, 6:31 AM CSTTornado WarningLIX29 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 archive20142016

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.