Alert archive / Louisiana / Assumption Parish

Weather alerts in Assumption Parish, Louisiana, 2021

176 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Assumption Parish and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts
176
Warnings
35
Watches
24
Advisories
71
Busiest month
May32 alerts
Busiest day
April 13, 202111 alerts

Over time

By month

Warning verification

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

Assumption Parish, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings17288%10%
Flash flood warnings5180%0

Each office's whole area, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS New Orleans, LA: tornado warnings791680%3969%8 min
NWS New Orleans, LA: severe thunderstorm warnings1543677%11657%14 min
NWS New Orleans, LA: flash flood warnings1305260%13485%91 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 6, 9:38 PM CSTMesoscale DiscussionSPC2 hr
Jan 23, 3:33 PM CSTDense Fog AdvisoryLIX18 hr
Jan 24, 3:25 PM CSTDense Fog AdvisoryLIX19 hr
Jan 27, 3:40 AM CSTDense Fog AdvisoryLIX5 hr
Feb 9, 4:55 AM CSTDense Fog AdvisoryLIX4 hr
Feb 9, 8:49 PM CSTDense Fog AdvisoryLIX13 hr
Feb 10, 3:16 PM CSTDense Fog AdvisoryLIX18 hr
Feb 11, 11:35 AM CSTAreal Flood AdvisoryLIX3 hr
Feb 14, 4:20 AM CSTHard Freeze WatchLIX15 hr
Feb 14, 4:20 AM CSTWind Chill WatchLIX15 hr
Feb 14, 4:20 AM CSTWinter Storm WarningLIX36 hr
Feb 14, 7:17 PM CSTHard Freeze WarningLIX41 hr
Feb 14, 7:17 PM CSTWind Chill AdvisoryLIX41 hr
Feb 15, 3:09 AM CSTMesoscale DiscussionSPC6 hr
Feb 16, 6:21 PM CSTFreeze WarningLIX14 hr
Feb 16, 10:02 PM CSTWinter Weather AdvisoryLIX14 hr
Feb 18, 10:04 AM CSTFreeze WarningLIX23 hr
Feb 19, 3:55 PM CSTFreeze WarningLIX16 hr
Feb 25, 3:06 AM CSTDense Fog AdvisoryLIX6 hr
Feb 25, 5:58 PM CSTDense Fog AdvisoryLIX15 hr
Feb 28, 3:50 PM CSTDense Fog AdvisoryLIX17 hr
Mar 12, 3:19 PM CSTDense Fog AdvisoryLIX18 hr
Mar 17, 3:33 AM CDTWind AdvisoryLIX18 hr
Mar 17, 1:45 PM CDTMesoscale DiscussionSPC90 min
Mar 17, 2:38 PM CDTTornado WatchSPC8 hr
Mar 17, 4:05 PM CDTSevere Thunderstorm WarningLIX40 min
Mar 17, 5:59 PM CDTAreal Flood AdvisoryLIX3 hr
Mar 17, 6:27 PM CDTSevere Thunderstorm WarningLIX63 min
Mar 22, 12:37 PM CDTFlash Flood WatchLIX63 hr
Mar 23, 9:41 AM CDTMesoscale DiscussionSPC2 hr
Mar 23, 11:22 AM CDTSpecial Weather StatementLIX23 min
Mar 24, 2:47 PM CDTWind AdvisoryLIX25 hr
Mar 25, 11:00 AM CDTMesoscale DiscussionSPC2 hr
Mar 25, 1:29 PM CDTSpecial Weather StatementLCH16 min
Mar 30, 10:43 AM CDTWind AdvisoryLIX81 min
Mar 30, 2:11 PM CDTWind AdvisoryLIX45 hr
Apr 1, 11:44 AM CDTWind AdvisoryLIX5 hr
Apr 1, 3:23 PM CDTFrost AdvisoryLIX17 hr
Apr 10, 12:16 AM CDTTornado WatchSPC7 hr
Apr 10, 3:26 AM CDTSpecial Weather StatementLIX64 min
Apr 10, 4:47 AM CDTSpecial Weather StatementLIX58 min
Apr 10, 5:46 AM CDTSpecial Weather StatementLIX59 min
Apr 13, 4:14 AM CDTFlash Flood WatchLIX5 days
Apr 13, 8:28 AM CDTMesoscale DiscussionSPC2 hr
Apr 13, 9:38 AM CDTSevere Thunderstorm WarningLIX13 min
Apr 13, 9:56 AM CDTSevere Thunderstorm WarningLIX19 min
Apr 13, 10:49 AM CDTSevere Thunderstorm WarningLIX26 min
Apr 13, 11:14 AM CDTSevere Thunderstorm WarningLIX31 min
Apr 13, 11:43 AM CDTMesoscale DiscussionSPC2 hr
Apr 13, 12:06 PM CDTSevere Thunderstorm WatchSPC6 hr
Apr 13, 6:17 PM CDTWind AdvisoryLIX6 hr
Apr 13, 6:44 PM CDTSpecial Weather StatementLIX46 min
Apr 13, 6:49 PM CDTSpecial Weather StatementLCH41 min
Apr 13, 7:36 PM CDTSpecial Weather StatementLIX24 min
Apr 14, 9:41 AM CDTSpecial Weather StatementLIX34 min
Apr 14, 10:20 AM CDTSpecial Weather StatementLIX25 min
Apr 15, 6:22 AM CDTSpecial Weather StatementLIX53 min
Apr 16, 6:12 AM CDTSpecial Weather StatementLIX48 min
Apr 17, 11:57 AM CDTAreal Flood AdvisoryLIX3 hr
Apr 24, 3:00 AM CDTSpecial Weather StatementLIX60 min
Apr 24, 3:04 AM CDTMesoscale DiscussionSPC116 min
May 1, 2:46 PM CDTFlash Flood WatchLIX24 hr
May 2, 5:39 AM CDTSpecial Weather StatementLIX51 min
May 4, 4:11 AM CDTFlash Flood WatchLIX33 hr
May 9, 8:48 PM CDTFlash Flood WatchLIX15 hr
May 10, 1:29 AM CDTAreal Flood AdvisoryLIX70 min
May 10, 1:49 AM CDTSpecial Weather StatementLIX56 min
May 10, 1:54 AM CDTSevere Thunderstorm WarningLIX51 min
May 10, 9:16 AM CDTSevere Thunderstorm WarningLIX44 min
May 10, 9:57 AM CDTSpecial Weather StatementLIX63 min
May 11, 3:11 AM CDTFlash Flood WatchLIX39 hr
May 11, 10:20 AM CDTAreal Flood AdvisoryLIX115 min
May 11, 8:33 PM CDTMesoscale DiscussionSPC87 min
May 11, 9:24 PM CDTSpecial Weather StatementLIX51 min
May 11, 10:35 PM CDTSpecial Weather StatementLIX40 min
May 11, 10:37 PM CDTSevere Thunderstorm WarningLIX30 min
May 11, 10:38 PM CDTFlash Flood WarningLIX3 hr
May 11, 11:05 PM CDTSevere Thunderstorm WarningLIX40 min
May 11, 11:41 PM CDTSevere Thunderstorm WarningLIX64 min
May 12, 12:18 AM CDTSpecial Weather StatementLIX27 min
May 12, 12:31 AM CDTAreal Flood AdvisoryLIX2 hr
May 17, 2:56 PM CDTFlash Flood WatchLIX4 days
May 17, 6:25 PM CDTMesoscale DiscussionSPC65 min
May 17, 6:50 PM CDTFlash Flood WarningLIX5 hr
May 17, 11:25 PM CDTAreal Flood AdvisoryLIX2 hr
May 18, 1:12 AM CDTHigh Wind WarningLIX6 hr
May 18, 9:21 AM CDTFlash Flood WarningLIX3 hr
May 19, 11:34 PM CDTMesoscale DiscussionSPC86 min
May 20, 3:42 AM CDTSpecial Weather StatementLIX63 min
May 20, 7:00 AM CDTSpecial Weather StatementLIX60 min
May 20, 8:37 AM CDTAreal Flood AdvisoryLIX52 min
May 20, 10:04 AM CDTFlash Flood WarningLIX13 hr
May 20, 5:16 PM CDTAreal Flood AdvisoryLIX3 hr
Jun 3, 4:45 PM CDTAreal Flood AdvisoryLIX104 min
Jun 4, 10:56 AM CDTFlash Flood WatchLIX56 hr
Jun 6, 9:56 AM CDTMesoscale DiscussionSPC3 hr
Jun 13, 9:34 PM CDTSpecial Weather StatementLIX56 min
Jun 14, 4:08 AM CDTHeat AdvisoryLIX8 hr
Jun 15, 1:26 PM CDTMesoscale DiscussionSPC3 hr
Jun 15, 4:18 PM CDTSevere Thunderstorm WarningLIX42 min
Jun 15, 4:50 PM CDTSevere Thunderstorm WarningLIX40 min
Jun 15, 5:27 PM CDTSevere Thunderstorm WarningLIX48 min
Jun 17, 1:36 PM CDTFlash Flood WatchLIX47 hr
Jun 17, 4:02 PM CDTTropical Storm WarningLIX48 hr
Jun 21, 7:56 PM CDTFlood WatchLIX6 min
Jun 21, 8:05 PM CDTFlash Flood WatchLIX23 hr
Jun 29, 12:36 PM CDTSpecial Weather StatementLIX24 min
Jul 13, 2:24 PM CDTSpecial Weather StatementLIX36 min
Jul 14, 3:37 PM CDTSpecial Weather StatementLIX23 min
Jul 17, 3:02 PM CDTSpecial Weather StatementLIX28 min
Jul 22, 1:43 PM CDTHeat AdvisoryLIX29 hr
Jul 24, 3:37 AM CDTHeat AdvisoryLIX14 hr
Jul 24, 3:20 PM CDTHeat AdvisoryLIX28 hr
Jul 25, 3:20 PM CDTHeat AdvisoryLIX28 hr
Jul 26, 3:11 PM CDTHeat AdvisoryLIX28 hr
Jul 27, 3:27 PM CDTHeat AdvisoryLIX28 hr
Jul 28, 1:44 PM CDTHeat AdvisoryLIX29 hr
Jul 28, 1:44 PM CDTHeat AdvisoryLIX38 hr
Jul 29, 1:40 PM CDTExcessive Heat WatchLIX26 hr
Jul 29, 1:40 PM CDTExcessive Heat WarningLIX29 hr
Jul 29, 1:40 PM CDTHeat AdvisoryLIX50 hr
Jul 30, 3:55 PM CDTExcessive Heat WarningLIX24 hr
Jul 31, 3:57 PM CDTHeat AdvisoryLIX26 hr
Aug 11, 2:28 PM CDTSpecial Weather StatementLIX77 min
Aug 12, 2:58 PM CDTAreal Flood AdvisoryLIX2 hr
Aug 19, 2:58 AM CDTHeat AdvisoryLIX16 hr
Aug 19, 1:26 PM CDTHeat AdvisoryLIX30 hr
Aug 20, 1:26 PM CDTHeat AdvisoryLIX26 hr
Aug 21, 3:30 PM CDTHeat AdvisoryLIX28 hr
Aug 22, 3:26 PM CDTHeat AdvisoryLIX28 hr
Aug 23, 1:57 PM CDTHeat AdvisoryLIX29 hr
Aug 24, 4:31 PM CDTSpecial Weather StatementLIX44 min
Aug 26, 10:09 PM CDTHurricane WatchLIX36 hr
Aug 26, 10:09 PM CDTStorm Surge WatchLIX18 hr
Aug 27, 4:01 PM CDTHurricane WarningLIX60 hr
Aug 27, 4:01 PM CDTTropical Storm WarningLIX24 days
Aug 27, 4:12 PM CDTStorm Surge WarningLIX3 days
Aug 28, 2:36 AM CDTFlood WatchLIX11 min
Aug 28, 3:13 AM CDTFlash Flood WatchLIX61 hr
Aug 29, 5:07 AM CDTMesoscale DiscussionSPC2 hr
Aug 29, 1:26 PM CDTExtreme Wind WarningLIX3 hr
Aug 30, 4:51 AM CDTCoastal Flood AdvisoryLIX15 hr
Aug 30, 2:57 PM CDTHeat AdvisoryLIX26 hr
Aug 31, 4:06 AM CDTHeat AdvisoryLIX38 hr
Aug 31, 5:22 PM CDTSpecial Weather StatementLIX53 min
Aug 31, 6:50 PM CDTFlash Flood WarningLIX42 min
Sep 1, 1:00 AM CDTHeat AdvisoryLIX40 hr
Sep 2, 6:15 PM CDTSpecial Weather StatementLIX45 min
Sep 3, 4:13 AM CDTHeat AdvisoryLIX14 hr
Sep 4, 3:20 AM CDTHeat AdvisoryLIX15 hr
Sep 4, 3:28 PM CDTHeat AdvisoryLIX27 hr
Sep 5, 2:57 PM CDTHeat AdvisoryLIX27 hr
Sep 6, 4:00 AM CDTFlash Flood WatchLIX17 hr
Sep 7, 3:47 AM CDTHeat AdvisoryLIX13 hr
Sep 7, 4:52 PM CDTAreal Flood AdvisoryLIX35 min
Sep 13, 2:45 PM CDTFlash Flood WatchLIX5 days
Sep 29, 1:33 PM CDTAreal Flood AdvisoryLIX2 hr
Oct 21, 3:38 AM CDTDense Fog AdvisoryLIX5 hr
Oct 27, 12:50 PM CDTMesoscale DiscussionSPC85 min
Oct 27, 1:53 PM CDTTornado WatchSPC8 hr
Oct 27, 3:25 PM CDTMesoscale DiscussionSPC95 min
Oct 27, 4:06 PM CDTSevere Thunderstorm WarningLIX39 min
Oct 27, 4:46 PM CDTSevere Thunderstorm WarningLIX44 min
Oct 27, 5:22 PM CDTSevere Thunderstorm WarningLIX38 min
Oct 27, 10:34 PM CDTWind AdvisoryLIX20 hr
Nov 11, 9:19 PM CSTDense Fog AdvisoryLIX12 hr
Dec 1, 4:08 PM CSTDense Fog AdvisoryLIX18 hr
Dec 2, 3:26 PM CSTDense Fog AdvisoryLIX19 hr
Dec 3, 10:02 AM CSTDense Fog AdvisoryLIX70 min
Dec 3, 3:32 PM CSTDense Fog AdvisoryLIX18 hr
Dec 4, 3:17 PM CSTDense Fog AdvisoryLIX18 hr
Dec 5, 9:02 AM CSTDense Fog AdvisoryLIX58 min
Dec 7, 4:57 PM CSTDense Fog AdvisoryLIX16 hr
Dec 14, 9:42 PM CSTDense Fog AdvisoryLIX9 hr
Dec 16, 3:22 PM CSTDense Fog AdvisoryLIX18 hr
Dec 17, 7:00 PM CSTDense Fog AdvisoryLIX15 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 archive20202022

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.