Alert archive / Arkansas / Calhoun County

Weather alerts in Calhoun County, Arkansas, 2020

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

Calhoun County and its neighbors

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

Alerts
122
Warnings
40
Watches
18
Advisories
22
Busiest month
April27 alerts
Busiest day
January 11, 20206 alerts

Over time

By month

Warning verification

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

Calhoun County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings12650%3100%37 min
Flash flood warnings7357%0

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Little Rock, AR: tornado warnings541180%3070%16 min
NWS Little Rock, AR: severe thunderstorm warnings37613664%29885%24 min
NWS Little Rock, AR: flash flood warnings1074360%10484%82 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, 4:30 AM CSTFlash Flood WatchLZK49 hr
Jan 10, 4:53 AM CSTMesoscale DiscussionSPC2 hr
Jan 10, 11:19 AM CSTRiver Flood WarningLZK21 days
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, 12:44 AM CSTSevere Thunderstorm WarningLZK46 min
Jan 11, 1:31 AM CSTSevere Thunderstorm WarningLZK59 min
Jan 11, 2:31 AM CSTSevere Thunderstorm WarningLZK59 min
Jan 11, 2:38 AM CSTFlash Flood WarningLZK3 hr
Jan 11, 8:16 AM CSTRiver Flood WarningLZK9 days
Jan 14, 12:05 AM CSTSpecial Weather StatementLZK40 min
Jan 14, 6:24 PM CSTDense Fog AdvisoryLZK15 hr
Jan 15, 3:11 PM CSTMesoscale DiscussionSPC2 hr
Jan 24, 9:46 AM CSTRiver Flood WarningLZK47 days
Jan 26, 10:52 PM CSTDense Fog AdvisoryLZK11 hr
Jan 27, 11:31 PM CSTDense Fog AdvisoryLZK12 hr
Feb 10, 3:33 AM CSTFlash Flood WatchLZK62 hr
Feb 10, 9:32 AM CSTRiver Flood WarningLZK19 days
Mar 12, 9:23 PM CDTMesoscale DiscussionSPC97 min
Mar 13, 10:17 AM CDTRiver Flood WarningLZK16 days
Mar 13, 10:17 AM CDTRiver Flood WarningLZK57 days
Mar 17, 3:49 AM CDTDense Fog AdvisoryLZK5 hr
Mar 28, 12:14 PM CDTMesoscale DiscussionSPC2 hr
Mar 28, 2:10 PM CDTTornado WatchSPC5 hr
Mar 28, 2:56 PM CDTMesoscale DiscussionSPC94 min
Mar 29, 9:33 AM CDTRiver Flood WarningLZK21 days
Apr 8, 5:10 AM CDTDense Fog AdvisoryLZK5 hr
Apr 8, 9:57 AM CDTSpecial Weather StatementLZK33 min
Apr 8, 10:35 AM CDTSpecial Weather StatementLZK40 min
Apr 11, 8:20 PM CDTRiver Flood WarningLZK21 days
Apr 12, 8:23 AM CDTSpecial Weather StatementLZK22 min
Apr 12, 11:13 AM CDTSpecial Weather StatementLZK32 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, 7:12 PM CDTSpecial Weather StatementLZK48 min
Apr 12, 7:18 PM CDTSevere Thunderstorm WarningLZK42 min
Apr 12, 7:56 PM CDTSevere Thunderstorm WarningLZK49 min
Apr 12, 7:56 PM CDTMesoscale DiscussionSPC2 hr
Apr 14, 2:38 PM CDTFrost AdvisoryLZK18 hr
Apr 18, 11:13 PM CDTSpecial Weather StatementLZK32 min
Apr 22, 12:23 PM CDTSevere Thunderstorm WarningLZK17 min
Apr 22, 12:24 PM CDTSevere Thunderstorm WarningLZK23 min
Apr 22, 12:39 PM CDTSpecial Weather StatementLZK36 min
Apr 22, 3:35 PM CDTFlash Flood WatchLZK10 hr
Apr 24, 8:31 PM CDTSevere Thunderstorm WatchSPC5 hr
Apr 24, 10:17 PM CDTMesoscale DiscussionSPC118 min
Apr 25, 1:18 AM CDTSpecial Weather StatementLZK42 min
Apr 28, 7:35 PM CDTSevere Thunderstorm WatchSPC7 hr
Apr 28, 11:12 PM CDTMesoscale DiscussionSPC63 min
Apr 28, 11:55 PM CDTSevere Thunderstorm WarningLZK65 min
Apr 29, 12:16 AM CDTSevere Thunderstorm WarningLZK59 min
Apr 29, 12:57 AM CDTSevere Thunderstorm WarningLZK48 min
May 8, 3:06 AM CDTSevere Thunderstorm WatchSPC7 hr
May 8, 5:22 AM CDTMesoscale DiscussionSPC83 min
May 8, 5:47 AM CDTSpecial Weather StatementLZK28 min
May 16, 1:16 PM CDTMesoscale DiscussionSPC2 hr
May 16, 3:27 PM CDTTornado WatchSPC6 hr
May 16, 8:31 PM CDTSevere Thunderstorm WarningLZK16 min
May 16, 10:05 PM CDTFlash Flood WarningLZK3 hr
May 17, 10:58 AM CDTRiver Flood WarningLZK18 days
May 17, 10:58 AM CDTRiver Flood WarningLZK29 days
May 23, 3:50 AM CDTSpecial Weather StatementLZK40 min
May 24, 11:09 PM CDTSpecial Weather StatementLZK51 min
May 25, 7:49 PM CDTSevere Thunderstorm WarningLZK26 min
Jun 4, 12:32 PM CDTMesoscale DiscussionSPC58 min
Jun 7, 2:50 AM CDTFlash Flood WatchLZK49 hr
Jun 8, 12:44 PM CDTRiver Flood AdvisoryLZK48 hr
Jun 9, 11:25 AM CDTRiver Flood WarningLZK52 hr
Jun 21, 7:36 PM CDTSpecial Weather StatementLZK39 min
Jun 21, 8:17 PM CDTSpecial Weather StatementLZK43 min
Jun 22, 1:10 AM CDTFlash Flood WarningLZK3 hr
Jun 22, 4:42 PM CDTSpecial Weather StatementLZK48 min
Jun 23, 9:50 AM CDTSpecial Weather StatementLZK40 min
Jun 23, 10:29 AM CDTSpecial Weather StatementLZK61 min
Jun 25, 9:34 AM CDTRiver Flood WatchLZK11 hr
Jun 25, 8:08 PM CDTRiver Flood WarningLZK9 days
Jun 28, 5:06 PM CDTSpecial Weather StatementLZK39 min
Jun 28, 5:43 PM CDTSpecial Weather StatementLZK32 min
Jun 30, 9:39 AM CDTRiver Flood WarningLZK5 days
Jun 30, 2:22 PM CDTHeat AdvisoryLZK53 hr
Jul 2, 10:20 PM CDTFlash Flood WarningLZK3 hr
Jul 9, 3:41 PM CDTMesoscale DiscussionSPC94 min
Jul 10, 4:11 AM CDTHeat AdvisoryLZK15 hr
Jul 10, 9:19 PM CDTHeat AdvisoryLZK23 hr
Jul 11, 2:32 PM CDTHeat AdvisoryLZK29 hr
Jul 13, 2:32 PM CDTHeat AdvisoryLZK29 hr
Jul 14, 2:43 PM CDTHeat AdvisoryLZK29 hr
Jul 15, 2:22 PM CDTHeat AdvisoryLZK30 hr
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 10, 3:22 AM CDTHeat AdvisoryLZK17 hr
Aug 12, 5:37 AM CDTFlash Flood WarningLZK3 hr
Aug 12, 7:34 AM CDTFlash Flood WarningLZK116 min
Aug 26, 3:11 AM CDTFlash Flood WatchLZK50 hr
Aug 26, 4:46 AM CDTTropical Storm WatchLZK12 hr
Aug 26, 10:45 AM CDTRiver Flood WarningLZK72 hr
Aug 26, 10:52 AM CDTRiver Flood WarningLZK6 days
Aug 26, 4:38 PM CDTTropical Storm WarningLZK30 hr
Aug 27, 6:36 AM CDTMesoscale DiscussionSPC114 min
Aug 27, 7:47 AM CDTTornado WatchSPC8 hr
Aug 27, 12:41 PM CDTFlash Flood WarningLZK4 hr
Aug 28, 2:43 PM CDTHeat AdvisoryLZK29 hr
Aug 29, 11:17 AM CDTExcessive Heat WarningLZK9 hr
Aug 29, 3:32 PM CDTMesoscale DiscussionSPC88 min
Aug 29, 11:33 PM CDTMesoscale DiscussionSPC87 min
Sep 2, 12:35 PM CDTMesoscale DiscussionSPC2 hr
Sep 5, 6:53 AM CDTRiver Flood WarningLZK4 days
Sep 8, 9:40 PM CDTRiver Flood AdvisoryLZK13 hr
Sep 24, 5:08 AM CDTRiver Flood WarningLZK6 days
Sep 24, 6:34 AM CDTRiver Flood WarningLZK4 days
Sep 30, 10:33 AM CDTRiver Flood AdvisoryLZK2 min
Oct 9, 2:06 AM CDTFlash Flood WatchLZK36 hr
Oct 10, 1:09 AM CDTWind AdvisoryLZK15 hr
Nov 26, 1:49 AM CSTDense Fog AdvisoryLZK8 hr
Nov 29, 2:27 PM CSTFrost AdvisoryLZK19 hr
Nov 30, 2:30 PM CSTFreeze WarningLZK19 hr
Dec 19, 9:29 PM CSTDense Fog AdvisoryLZK11 hr
Dec 23, 3:46 PM CSTMesoscale DiscussionSPC89 min
Dec 30, 3:56 AM CSTFlash Flood WatchLZK44 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.