Alert archive / Arkansas / Columbia County

Weather alerts in Columbia County, Arkansas, 2021

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

Columbia County and its neighbors

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

Alerts
137
Warnings
24
Watches
20
Advisories
41
Busiest month
March24 alerts
Busiest day
March 17, 20217 alerts

Over time

By month

Warning verification

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

Columbia County, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings10730%3100%18 min
Flash flood warnings20100%0

Each office's whole area, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Shreveport, LA: tornado warnings361656%3574%17 min
NWS Shreveport, LA: severe thunderstorm warnings22113539%35971%22 min
NWS Shreveport, LA: flash flood warnings341944%8382%129 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 10, 2:55 AM CSTWinter Weather AdvisorySHV29 hr
Jan 14, 9:11 PM CSTWind AdvisorySHV21 hr
Jan 20, 9:49 AM CSTRiver Flood WarningSHV14 days
Jan 24, 5:58 PM CSTSpecial Weather StatementSHV32 min
Jan 29, 2:13 PM CSTLake Wind AdvisorySHV28 hr
Feb 10, 2:29 PM CSTWinter Weather AdvisorySHV46 hr
Feb 12, 4:03 PM CSTWinter Storm WatchSHV10 hr
Feb 13, 2:25 AM CSTWinter Storm WarningSHV60 hr
Feb 13, 2:57 PM CSTWind Chill AdvisorySHV69 hr
Feb 13, 6:01 PM CSTHard Freeze WarningSHV66 hr
Feb 15, 1:08 AM CSTMesoscale DiscussionSPC6 hr
Feb 15, 2:27 PM CSTWinter Storm WarningSHV67 hr
Feb 17, 9:15 AM CSTMesoscale DiscussionSPC6 hr
Feb 18, 9:41 AM CSTHard Freeze WarningSHV24 hr
Feb 19, 9:11 AM CSTHard Freeze WarningSHV25 hr
Feb 19, 9:56 PM CSTFreezing Fog AdvisorySHV12 hr
Feb 22, 8:24 PM CSTRiver Flood WarningSHV18 days
Feb 25, 10:45 PM CSTSevere Thunderstorm WarningSHV45 min
Feb 25, 11:25 PM CSTMesoscale DiscussionSPC2 hr
Feb 27, 9:09 PM CSTDense Fog AdvisorySHV5 hr
Feb 28, 5:54 PM CSTSevere Thunderstorm WatchSPC4 hr
Feb 28, 9:01 PM CSTMesoscale DiscussionSPC89 min
Mar 10, 3:52 AM CSTLake Wind AdvisorySHV13 hr
Mar 15, 3:03 AM CDTDense Fog AdvisorySHV7 hr
Mar 15, 3:03 AM CDTLake Wind AdvisorySHV15 hr
Mar 17, 1:32 AM CDTMesoscale DiscussionSPC118 min
Mar 17, 2:01 AM CDTSpecial Weather StatementSHV44 min
Mar 17, 2:45 AM CDTLake Wind AdvisorySHV40 hr
Mar 17, 4:04 AM CDTMesoscale DiscussionSPC86 min
Mar 17, 6:40 AM CDTMesoscale DiscussionSPC95 min
Mar 17, 8:43 AM CDTTornado WatchSPC4 hr
Mar 17, 9:26 AM CDTSpecial Weather StatementSHV64 min
Mar 18, 9:58 AM CDTRiver Flood WarningSHV35 days
Mar 22, 2:12 AM CDTLake Wind AdvisorySHV24 hr
Mar 24, 11:37 PM CDTMesoscale DiscussionSPC53 min
Mar 25, 2:41 AM CDTLake Wind AdvisorySHV15 hr
Mar 27, 2:16 PM CDTMesoscale DiscussionSPC89 min
Mar 27, 3:25 PM CDTTornado WatchSPC10 hr
Mar 27, 4:04 PM CDTSpecial Weather StatementSHV41 min
Mar 27, 6:42 PM CDTMesoscale DiscussionSPC2 hr
Mar 27, 7:56 PM CDTSevere Thunderstorm WarningSHV49 min
Mar 30, 6:47 PM CDTMesoscale DiscussionSPC2 hr
Mar 31, 2:47 AM CDTSevere Thunderstorm WarningSHV43 min
Mar 31, 3:27 AM CDTLake Wind AdvisorySHV16 hr
Mar 31, 3:30 AM CDTSpecial Weather StatementSHV45 min
Apr 1, 2:35 PM CDTFreeze WarningSHV18 hr
Apr 7, 11:10 AM CDTMesoscale DiscussionSPC2 hr
Apr 7, 12:38 PM CDTTornado WatchSPC7 hr
Apr 7, 2:22 PM CDTMesoscale DiscussionSPC53 min
Apr 7, 3:40 PM CDTMesoscale DiscussionSPC65 min
Apr 9, 12:07 PM CDTSevere Thunderstorm WatchSPC6 hr
Apr 9, 2:03 PM CDTSevere Thunderstorm WarningSHV30 min
Apr 9, 2:32 PM CDTSevere Thunderstorm WarningSHV43 min
Apr 9, 3:05 PM CDTSevere Thunderstorm WarningSHV55 min
Apr 9, 5:32 PM CDTSevere Thunderstorm WatchSPC7 hr
Apr 9, 11:55 PM CDTSevere Thunderstorm WarningSHV65 min
Apr 10, 12:52 AM CDTSevere Thunderstorm WatchSPC3 hr
Apr 23, 9:20 AM CDTRiver Flood WarningSHV55 days
Apr 23, 2:21 PM CDTLake Wind AdvisorySHV17 hr
Apr 24, 2:52 AM CDTSpecial Weather StatementSHV38 min
Apr 28, 2:43 PM CDTFlash Flood WatchSHV23 hr
May 3, 3:08 AM CDTLake Wind AdvisorySHV15 hr
May 3, 8:38 PM CDTMesoscale DiscussionSPC2 hr
May 3, 9:10 PM CDTSevere Thunderstorm WatchSPC7 hr
May 4, 6:44 AM CDTMesoscale DiscussionSPC2 hr
May 4, 10:52 AM CDTTornado WatchSPC7 hr
May 9, 12:14 PM CDTMesoscale DiscussionSPC91 min
May 9, 1:14 PM CDTSevere Thunderstorm WatchSPC8 hr
May 9, 3:42 PM CDTMesoscale DiscussionSPC93 min
May 9, 4:49 PM CDTSpecial Weather StatementSHV41 min
May 9, 5:41 PM CDTMesoscale DiscussionSPC2 hr
May 9, 6:47 PM CDTSpecial Weather StatementSHV58 min
May 9, 7:17 PM CDTSevere Thunderstorm WarningSHV58 min
May 11, 2:04 AM CDTFlash Flood WatchSHV24 hr
May 17, 1:56 PM CDTFlash Flood WatchSHV5 days
May 18, 2:30 PM CDTMesoscale DiscussionSPC2 hr
May 26, 2:23 AM CDTFlash Flood WarningSHV3 hr
May 26, 3:56 AM CDTSpecial Weather StatementSHV64 min
May 26, 4:20 AM CDTFlash Flood WarningSHV4 hr
May 28, 12:59 AM CDTSpecial Weather StatementSHV46 min
May 28, 1:50 AM CDTSpecial Weather StatementSHV40 min
Jun 7, 3:04 AM CDTFlash Flood WatchSHV52 hr
Jun 7, 12:32 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 7, 3:04 PM CDTSpecial Weather StatementSHV56 min
Jun 7, 3:08 PM CDTMesoscale DiscussionSPC2 hr
Jun 7, 3:52 PM CDTSpecial Weather StatementSHV53 min
Jun 8, 11:17 AM CDTMesoscale DiscussionSPC118 min
Jun 8, 12:42 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 9, 12:55 PM CDTFlash Flood WatchSHV21 hr
Jun 28, 4:59 PM CDTSpecial Weather StatementSHV61 min
Jul 11, 2:54 AM CDTSpecial Weather StatementSHV51 min
Jul 16, 6:45 PM CDTSpecial Weather StatementSHV45 min
Jul 19, 7:02 AM CDTAreal Flood AdvisorySHV3 hr
Jul 24, 2:38 PM CDTHeat AdvisorySHV28 hr
Jul 25, 2:11 PM CDTHeat AdvisorySHV29 hr
Jul 26, 2:40 PM CDTHeat AdvisorySHV28 hr
Jul 27, 8:05 AM CDTSpecial Weather StatementSHV25 min
Jul 27, 2:18 PM CDTHeat AdvisorySHV29 hr
Jul 28, 2:27 PM CDTHeat AdvisorySHV29 hr
Jul 29, 1:58 PM CDTHeat AdvisorySHV3 days
Aug 1, 9:38 PM CDTSpecial Weather StatementSHV37 min
Aug 9, 2:55 AM CDTHeat AdvisorySHV16 hr
Aug 9, 7:04 PM CDTHeat AdvisorySHV3 days
Aug 19, 2:24 PM CDTSpecial Weather StatementSHV36 min
Aug 19, 3:29 PM CDTSpecial Weather StatementSHV46 min
Aug 21, 2:07 AM CDTHeat AdvisorySHV5 days
Aug 26, 3:53 AM CDTHeat AdvisorySHV14 hr
Aug 31, 3:03 PM CDTHeat AdvisorySHV28 hr
Sep 21, 11:51 AM CDTMesoscale DiscussionSPC2 hr
Oct 27, 9:44 AM CDTMesoscale DiscussionSPC2 hr
Oct 27, 12:52 PM CDTMesoscale DiscussionSPC83 min
Oct 27, 3:07 PM CDTLake Wind AdvisorySHV52 hr
Nov 4, 2:48 PM CDTFreeze WarningSHV18 hr
Nov 7, 5:01 AM CSTDense Fog AdvisorySHV4 hr
Nov 11, 1:19 AM CSTMesoscale DiscussionSPC2 hr
Nov 11, 1:23 AM CSTSpecial Weather StatementSHV67 min
Nov 17, 2:48 AM CSTLake Wind AdvisorySHV13 hr
Nov 18, 3:31 AM CSTFreeze WarningSHV27 hr
Dec 2, 4:53 AM CSTDense Fog AdvisorySHV5 hr
Dec 3, 3:41 AM CSTDense Fog AdvisorySHV6 hr
Dec 6, 12:36 AM CSTLake Wind AdvisorySHV14 hr
Dec 10, 3:49 AM CSTLake Wind AdvisorySHV31 hr
Dec 10, 6:34 PM CSTTornado WatchSPC4 hr
Dec 10, 10:00 PM CSTMesoscale DiscussionSPC90 min
Dec 10, 10:44 PM CSTTornado WatchSPC6 hr
Dec 11, 12:09 AM CSTSevere Thunderstorm WarningSHV51 min
Dec 16, 2:08 PM CSTMesoscale DiscussionSPC3 hr
Dec 18, 3:03 AM CSTLake Wind AdvisorySHV15 hr
Dec 21, 5:12 AM CSTDense Fog AdvisorySHV5 hr
Dec 23, 2:34 PM CSTLake Wind AdvisorySHV36 hr
Dec 26, 3:49 AM CSTDense Fog AdvisorySHV6 hr
Dec 28, 2:05 AM CSTLake Wind AdvisorySHV13 hr
Dec 29, 9:25 AM CSTMesoscale DiscussionSPC2 hr
Dec 29, 1:15 PM CSTSpecial Weather StatementSHV30 min
Dec 29, 1:33 PM CSTSevere Thunderstorm WarningSHV42 min
Dec 29, 4:44 PM CSTMesoscale DiscussionSPC2 hr
Dec 29, 8:51 PM CSTDense Fog AdvisorySHV14 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.