Alert archive / Arkansas / Union County

Weather alerts in Union County, Arkansas, 2020

130 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Union County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts
130
Warnings
39
Watches
17
Advisories
29
Busiest month
May24 alerts
Busiest day
April 12, 20207 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 3 tornado warnings covering Union County in 2020 had a tornado report inside them.

Union County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings30100%0
Severe thunderstorm warnings181422%4100%26 min
Flash flood warnings4325%0

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Shreveport, LA: tornado warnings772962%6763%14 min
NWS Shreveport, LA: severe thunderstorm warnings25218626%54079%24 min
NWS Shreveport, LA: flash flood warnings553733%11790%105 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 9, 2:49 AM CSTLake Wind AdvisorySHV50 hr
Jan 10, 4:55 PM CSTMesoscale DiscussionSPC2 hr
Jan 10, 5:34 PM CSTTornado WatchSPC11 hr
Jan 10, 10:40 PM CSTMesoscale DiscussionSPC2 hr
Jan 11, 12:28 AM CSTTornado WatchSPC8 hr
Jan 11, 1:30 AM CSTSevere Thunderstorm WarningSHV60 min
Jan 11, 2:16 AM CSTSevere Thunderstorm WarningSHV59 min
Jan 11, 8:16 AM CSTRiver Flood WarningLZK9 days
Jan 14, 8:35 PM CSTDense Fog AdvisorySHV12 hr
Jan 24, 9:46 AM CSTRiver Flood WarningLZK47 days
Jan 29, 10:04 AM CSTRiver Flood WarningSHV138 days
Feb 5, 12:04 PM CSTSevere Thunderstorm WarningSHV24 min
Feb 9, 3:56 PM CSTFlash Flood WatchSHV71 hr
Feb 10, 7:54 PM CSTFlash Flood WarningSHV2 hr
Feb 12, 3:58 PM CSTAreal Flood WarningSHV3 hr
Feb 23, 1:30 PM CSTLake Wind AdvisorySHV29 hr
Mar 1, 4:46 AM CSTLake Wind AdvisorySHV13 hr
Mar 13, 10:17 AM CDTRiver Flood WarningLZK57 days
Mar 17, 3:07 AM CDTDense Fog AdvisorySHV7 hr
Mar 28, 12:14 PM CDTMesoscale DiscussionSPC2 hr
Mar 30, 7:42 PM CDTSpecial Weather StatementSHV33 min
Apr 8, 9:25 AM CDTSpecial Weather StatementSHV50 min
Apr 8, 9:47 AM CDTSpecial Weather StatementSHV13 min
Apr 12, 2:45 AM CDTLake Wind AdvisorySHV21 hr
Apr 12, 5:52 AM CDTTornado WatchSPC8 hr
Apr 12, 8:05 AM CDTSpecial Weather StatementSHV40 min
Apr 12, 10:47 AM CDTSevere Thunderstorm WarningSHV58 min
Apr 12, 4:44 PM CDTMesoscale DiscussionSPC2 hr
Apr 12, 5:59 PM CDTSevere Thunderstorm WatchSPC4 hr
Apr 12, 6:14 PM CDTMesoscale DiscussionSPC91 min
Apr 12, 7:10 PM CDTSevere Thunderstorm WarningSHV65 min
Apr 12, 7:49 PM CDTSevere Thunderstorm WarningSHV56 min
Apr 12, 7:56 PM CDTMesoscale DiscussionSPC2 hr
Apr 18, 11:03 PM CDTSpecial Weather StatementSHV42 min
Apr 19, 11:19 AM CDTMesoscale DiscussionSPC116 min
Apr 21, 2:58 PM CDTFlash Flood WatchSHV35 hr
Apr 24, 8:31 PM CDTSevere Thunderstorm WatchSPC5 hr
Apr 24, 8:37 PM CDTSevere Thunderstorm WarningSHV53 min
Apr 24, 10:17 PM CDTMesoscale DiscussionSPC118 min
Apr 28, 8:25 PM CDTSevere Thunderstorm WatchSPC9 hr
Apr 29, 12:11 AM CDTSevere Thunderstorm WarningSHV64 min
Apr 29, 12:20 AM CDTSevere Thunderstorm WarningSHV55 min
Apr 29, 12:51 AM CDTSevere Thunderstorm WarningSHV54 min
Apr 29, 3:21 PM CDTLake Wind AdvisorySHV4 hr
May 5, 8:37 AM CDTSpecial Weather StatementSHV38 min
May 8, 1:12 AM CDTLake Wind AdvisorySHV18 hr
May 8, 3:06 AM CDTSevere Thunderstorm WatchSPC7 hr
May 8, 5:14 AM CDTSevere Thunderstorm WarningSHV46 min
May 8, 5:22 AM CDTMesoscale DiscussionSPC83 min
May 8, 5:46 AM CDTSevere Thunderstorm WarningSHV44 min
May 15, 8:56 PM CDTSevere Thunderstorm WarningSHV39 min
May 16, 1:16 PM CDTMesoscale DiscussionSPC2 hr
May 16, 3:27 PM CDTTornado WatchSPC6 hr
May 16, 4:37 PM CDTFlash Flood WatchSHV14 hr
May 16, 5:16 PM CDTTornado WarningSHV44 min
May 16, 5:31 PM CDTMesoscale DiscussionSPC59 min
May 16, 8:13 PM CDTTornado WarningSHV32 min
May 16, 8:32 PM CDTTornado WarningSHV17 min
May 17, 12:19 AM CDTAreal Flood AdvisorySHV3 hr
May 17, 10:58 AM CDTRiver Flood WarningLZK29 days
May 21, 7:05 PM CDTSevere Thunderstorm WarningSHV55 min
May 23, 4:56 AM CDTSpecial Weather StatementSHV34 min
May 23, 7:13 AM CDTSpecial Weather StatementSHV47 min
May 25, 6:43 PM CDTSpecial Weather StatementSHV47 min
May 26, 11:55 PM CDTSevere Thunderstorm WarningSHV57 min
May 27, 12:43 AM CDTSevere Thunderstorm WarningSHV27 min
May 27, 1:13 AM CDTSpecial Weather StatementSHV47 min
May 27, 1:28 AM CDTAreal Flood AdvisorySHV3 hr
Jun 4, 12:32 PM CDTMesoscale DiscussionSPC58 min
Jun 5, 8:23 PM CDTSpecial Weather StatementSHV52 min
Jun 5, 8:31 PM CDTSevere Thunderstorm WarningSHV44 min
Jun 5, 9:16 PM CDTSpecial Weather StatementSHV59 min
Jun 7, 10:15 AM CDTLake Wind AdvisorySHV9 hr
Jun 8, 8:02 AM CDTLake Wind AdvisorySHV14 hr
Jun 9, 11:19 PM CDTSpecial Weather StatementSHV41 min
Jun 21, 6:53 PM CDTSpecial Weather StatementSHV37 min
Jun 21, 8:43 PM CDTSevere Thunderstorm WarningSHV30 min
Jun 21, 9:12 PM CDTSpecial Weather StatementSHV48 min
Jun 22, 3:04 AM CDTSpecial Weather StatementSHV56 min
Jun 23, 8:30 AM CDTSpecial Weather StatementSHV45 min
Jun 23, 9:01 AM CDTAreal Flood AdvisorySHV3 hr
Jun 24, 5:40 PM CDTSpecial Weather StatementSHV50 min
Jun 25, 9:34 AM CDTRiver Flood WatchLZK11 hr
Jun 25, 8:08 PM CDTRiver Flood WarningLZK9 days
Jun 28, 4:36 PM CDTSpecial Weather StatementSHV54 min
Jun 30, 1:26 PM CDTHeat AdvisorySHV54 hr
Jul 6, 1:47 PM CDTFlash Flood WarningSHV3 hr
Jul 10, 4:47 AM CDTHeat AdvisorySHV5 days
Jul 11, 5:32 AM CDTExcessive Heat WarningSHV4 days
Jul 13, 3:32 AM CDTExcessive Heat WarningSHV39 hr
Jul 14, 2:09 PM CDTHeat AdvisorySHV53 hr
Jul 21, 6:15 PM CDTSpecial Weather StatementSHV45 min
Jul 22, 11:57 AM CDTSpecial Weather StatementSHV48 min
Jul 30, 3:41 PM CDTMesoscale DiscussionSPC2 hr
Jul 30, 8:36 PM CDTSevere Thunderstorm WatchSPC3 hr
Jul 30, 10:24 PM CDTMesoscale DiscussionSPC96 min
Aug 12, 5:44 AM CDTAreal Flood AdvisorySHV3 hr
Aug 14, 3:02 AM CDTHeat AdvisorySHV64 hr
Aug 25, 2:49 PM CDTFlash Flood WatchSHV60 hr
Aug 25, 9:52 PM CDTTropical Storm WarningSHV45 hr
Aug 26, 10:52 AM CDTRiver Flood WarningLZK6 days
Aug 27, 6:36 AM CDTMesoscale DiscussionSPC114 min
Aug 27, 7:47 AM CDTTornado WatchSPC8 hr
Aug 27, 3:02 PM CDTHeat AdvisorySHV52 hr
Aug 29, 3:32 PM CDTMesoscale DiscussionSPC88 min
Aug 30, 4:03 AM CDTHeat AdvisorySHV39 hr
Sep 2, 12:35 PM CDTMesoscale DiscussionSPC2 hr
Sep 2, 2:49 PM CDTSpecial Weather StatementSHV26 min
Sep 2, 3:15 PM CDTSpecial Weather StatementSHV30 min
Sep 5, 6:53 AM CDTRiver Flood WarningLZK4 days
Sep 8, 9:40 PM CDTRiver Flood AdvisoryLZK13 hr
Sep 10, 4:46 PM CDTAreal Flood AdvisorySHV3 hr
Sep 10, 5:22 PM CDTFlash Flood WarningSHV3 hr
Sep 23, 10:48 AM CDTFlash Flood WarningSHV4 hr
Sep 24, 5:08 AM CDTRiver Flood WarningLZK6 days
Sep 26, 5:04 AM CDTDense Fog AdvisorySHV5 hr
Sep 28, 1:43 AM CDTLake Wind AdvisorySHV17 hr
Sep 30, 10:33 AM CDTRiver Flood AdvisoryLZK2 min
Oct 8, 2:27 AM CDTFlash Flood WatchSHV55 hr
Oct 9, 10:24 AM CDTLake Wind AdvisorySHV29 hr
Oct 23, 3:13 PM CDTSpecial Weather StatementSHV32 min
Oct 23, 4:02 PM CDTSpecial Weather StatementSHV43 min
Oct 29, 3:03 AM CDTLake Wind AdvisorySHV15 hr
Nov 25, 1:17 AM CSTMesoscale DiscussionSPC118 min
Nov 25, 2:29 AM CSTSpecial Weather StatementSHV46 min
Nov 30, 1:47 PM CSTFreeze WarningSHV19 hr
Dec 19, 9:38 PM CSTDense Fog AdvisorySHV11 hr
Dec 23, 3:07 AM CSTLake Wind AdvisorySHV38 hr
Dec 23, 3:46 PM CSTMesoscale DiscussionSPC89 min
Dec 30, 3:12 AM CSTFlash Flood WatchSHV45 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 archive20192021

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.