Alert archive / Arkansas / Calhoun County

Weather alerts in Calhoun County, Arkansas, 2009

223 weather alerts in 2009, 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 2009. Tap one for its archive.

Alerts
223
Warnings
78
Watches
44
Advisories
38
Busiest month
May51 alerts
Busiest day
May 6, 200915 alerts

Over time

By month

Warning verification

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

1 of 3 tornado warnings covering Calhoun County in 2009 had a tornado report inside them.

Calhoun County, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings3167%0
Severe thunderstorm warnings301453%1889%33 min
Flash flood warnings211052%667%77 min

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Little Rock, AR: tornado warnings50884%1182%26 min
NWS Little Rock, AR: severe thunderstorm warnings54817468%41385%25 min
NWS Little Rock, AR: flash flood warnings1677157%13887%95 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 2, 5:01 PM CSTDense Fog AdvisoryLZK11 hr
Jan 5, 3:35 AM CSTFlash Flood WatchLZK23 hr
Jan 27, 3:45 AM CSTWinter Weather AdvisoryLZK26 hr
Feb 6, 3:50 AM CSTLake Wind AdvisoryLZK14 hr
Feb 7, 3:35 AM CSTLake Wind AdvisoryLZK14 hr
Feb 8, 2:53 PM CSTLake Wind AdvisoryLZK27 hr
Feb 10, 3:56 AM CSTWind AdvisoryLZK38 hr
Feb 11, 12:37 AM CSTMesoscale DiscussionSPC53 min
Feb 11, 1:04 AM CSTTornado WatchSPC5 hr
Feb 11, 4:01 AM CSTMesoscale DiscussionSPC89 min
Feb 17, 5:44 PM CSTMesoscale DiscussionSPC3 hr
Feb 17, 7:09 PM CSTSevere Thunderstorm WatchSPC6 hr
Feb 18, 2:58 AM CSTLake Wind AdvisoryLZK13 hr
Feb 26, 3:58 AM CSTLake Wind AdvisoryLZK14 hr
Feb 26, 9:40 PM CSTSevere Thunderstorm WatchSPC5 hr
Feb 26, 10:36 PM CSTMesoscale DiscussionSPC114 min
Feb 27, 8:29 AM CSTMesoscale DiscussionSPC31 min
Feb 27, 8:40 AM CSTSevere Thunderstorm WatchSPC6 hr
Feb 27, 10:15 AM CSTMesoscale DiscussionSPC90 min
Mar 4, 9:27 PM CSTLake Wind AdvisoryLZK45 hr
Mar 7, 4:30 AM CSTLake Wind AdvisoryLZK14 hr
Mar 8, 4:30 AM CDTLake Wind AdvisoryLZK14 hr
Mar 8, 10:11 AM CDTMesoscale DiscussionSPC2 hr
Mar 15, 10:53 AM CDTRiver Flood WarningLZK5 days
Mar 17, 2:35 AM CDTDense Fog AdvisoryLZK8 hr
Mar 23, 3:57 AM CDTLake Wind AdvisoryLZK15 hr
Mar 24, 3:43 AM CDTLake Wind AdvisoryLZK15 hr
Mar 26, 6:15 AM CDTDense Fog AdvisoryLZK3 hr
Mar 27, 5:53 PM CDTMesoscale DiscussionSPC97 min
Mar 27, 6:35 PM CDTTornado WatchSPC7 hr
Mar 27, 10:24 PM CDTMesoscale DiscussionSPC96 min
Mar 28, 4:18 AM CDTLake Wind AdvisoryLZK15 hr
Mar 28, 10:13 AM CDTRiver Flood WarningLZK10 days
Mar 29, 10:07 AM CDTRiver Flood WarningLZK45 hr
Apr 1, 2:45 PM CDTLake Wind AdvisoryLZK34 hr
Apr 2, 8:01 AM CDTMesoscale DiscussionSPC59 min
Apr 3, 2:11 PM CDTFreeze WatchLZK48 hr
Apr 5, 2:49 AM CDTLake Wind AdvisoryLZK40 hr
Apr 5, 2:26 PM CDTFreeze WarningLZK43 hr
Apr 9, 3:14 AM CDTLake Wind AdvisoryLZK22 hr
Apr 9, 7:21 PM CDTTornado WatchSPC5 hr
Apr 9, 8:44 PM CDTMesoscale DiscussionSPC61 min
Apr 9, 9:43 PM CDTMesoscale DiscussionSPC2 hr
Apr 10, 4:59 AM CDTLake Wind AdvisoryLZK14 hr
Apr 12, 7:13 AM CDTMesoscale DiscussionSPC92 min
Apr 12, 7:32 AM CDTSevere Thunderstorm WarningLZK43 min
Apr 12, 7:44 AM CDTSevere Thunderstorm WatchSPC6 hr
Apr 12, 8:11 AM CDTSevere Thunderstorm WarningLZK49 min
Apr 12, 12:00 PM CDTMesoscale DiscussionSPC90 min
Apr 14, 10:17 AM CDTRiver Flood WarningLZK47 hr
Apr 14, 10:17 AM CDTRiver Flood WarningLZK11 days
Apr 19, 2:43 AM CDTLake Wind AdvisoryLZK12 hr
Apr 19, 12:14 PM CDTMesoscale DiscussionSPC61 min
Apr 19, 12:38 PM CDTSevere Thunderstorm WatchSPC6 hr
Apr 19, 2:22 PM CDTMesoscale DiscussionSPC53 min
Apr 23, 3:10 AM CDTLake Wind AdvisoryLZK16 hr
Apr 24, 3:49 AM CDTLake Wind AdvisoryLZK15 hr
Apr 26, 11:50 AM CDTRiver Flood AdvisoryLZK43 hr
Apr 26, 11:50 AM CDTRiver Flood AdvisoryLZK43 hr
Apr 27, 2:24 PM CDTMesoscale DiscussionSPC66 min
Apr 27, 2:57 PM CDTSevere Thunderstorm WatchSPC6 hr
Apr 27, 7:08 PM CDTMesoscale DiscussionSPC67 min
Apr 28, 5:03 AM CDTFlash Flood WatchLZK10 hr
Apr 29, 3:04 PM CDTMesoscale DiscussionSPC56 min
Apr 29, 3:27 PM CDTSevere Thunderstorm WatchSPC6 hr
Apr 29, 6:44 PM CDTSevere Thunderstorm WarningLZK46 min
Apr 30, 3:34 PM CDTMesoscale DiscussionSPC86 min
May 1, 3:33 PM CDTFlash Flood WatchLZK47 hr
May 2, 9:23 AM CDTMesoscale DiscussionSPC97 min
May 2, 12:17 PM CDTTornado WatchSPC7 hr
May 2, 3:30 PM CDTSevere Thunderstorm WarningLZK45 min
May 2, 3:47 PM CDTMesoscale DiscussionSPC58 min
May 2, 4:59 PM CDTFlash Flood WarningLZK6 hr
May 2, 5:25 PM CDTMesoscale DiscussionSPC95 min
May 2, 6:03 PM CDTTornado WatchSPC6 hr
May 2, 7:08 PM CDTSevere Thunderstorm WarningLZK67 min
May 2, 7:38 PM CDTMesoscale DiscussionSPC97 min
May 2, 9:45 PM CDTRiver Flood WarningLZK31 days
May 2, 9:59 PM CDTMesoscale DiscussionSPC3 hr
May 2, 10:40 PM CDTMesoscale DiscussionSPC2 hr
May 3, 1:20 AM CDTFlash Flood WarningLZK4 hr
May 3, 2:39 AM CDTMesoscale DiscussionSPC2 hr
May 3, 5:16 AM CDTFlash Flood WarningLZK4 hr
May 3, 9:35 AM CDTFlash Flood WarningLZK5 hr
May 3, 12:17 PM CDTRiver Flood WarningLZK44 days
May 5, 4:10 AM CDTFlash Flood WatchLZK33 hr
May 5, 10:07 PM CDTMesoscale DiscussionSPC83 min
May 5, 10:27 PM CDTSevere Thunderstorm WatchSPC8 hr
May 5, 11:18 PM CDTSevere Thunderstorm WarningLZK57 min
May 5, 11:48 PM CDTTornado WarningLZK42 min
May 6, 12:53 AM CDTMesoscale DiscussionSPC37 min
May 6, 12:54 AM CDTTornado WatchSPC5 hr
May 6, 3:05 AM CDTMesoscale DiscussionSPC115 min
May 6, 4:07 AM CDTSevere Thunderstorm WarningLZK53 min
May 6, 4:19 AM CDTSevere Thunderstorm WarningLZK56 min
May 6, 5:20 AM CDTSevere Thunderstorm WarningLZK25 min
May 6, 5:45 AM CDTSevere Thunderstorm WatchSPC7 hr
May 6, 6:58 AM CDTMesoscale DiscussionSPC3 hr
May 6, 7:00 AM CDTFlash Flood WarningLZK5 hr
May 6, 7:52 AM CDTSevere Thunderstorm WarningLZK38 min
May 6, 12:01 PM CDTAreal Flood WarningLZK3 hr
May 7, 5:03 AM CDTDense Fog AdvisoryLZK5 hr
May 8, 3:53 AM CDTFlash Flood WatchLZK4 days
May 8, 10:59 AM CDTLake Wind AdvisoryLZK7 hr
May 9, 12:33 PM CDTMesoscale DiscussionSPC57 min
May 9, 12:51 PM CDTSevere Thunderstorm WatchSPC7 hr
May 9, 3:25 PM CDTMesoscale DiscussionSPC65 min
May 10, 3:45 AM CDTSevere Thunderstorm WarningLZK45 min
May 10, 4:30 AM CDTSevere Thunderstorm WarningLZK45 min
May 10, 5:32 AM CDTFlash Flood WarningLZK4 hr
May 10, 10:00 AM CDTAreal Flood WarningLZK6 hr
May 10, 11:17 AM CDTMesoscale DiscussionSPC118 min
May 10, 4:04 PM CDTFlash Flood WarningLZK3 hr
May 11, 10:16 AM CDTFlash Flood WarningLZK3 hr
May 12, 2:20 PM CDTMesoscale DiscussionSPC55 min
May 12, 3:35 PM CDTFlash Flood WarningLZK2 hr
May 13, 3:23 AM CDTLake Wind AdvisoryLZK16 hr
May 26, 2:40 AM CDTDense Fog AdvisoryLZK6 hr
Jun 3, 6:26 AM CDTMesoscale DiscussionSPC2 hr
Jun 3, 4:36 PM CDTSevere Thunderstorm WarningLZK39 min
Jun 3, 5:22 PM CDTSevere Thunderstorm WarningLZK38 min
Jun 3, 5:42 PM CDTFlash Flood WarningLZK3 hr
Jun 10, 6:17 PM CDTMesoscale DiscussionSPC58 min
Jun 10, 6:37 PM CDTSevere Thunderstorm WatchSPC8 hr
Jun 10, 11:07 PM CDTMesoscale DiscussionSPC83 min
Jun 10, 11:53 PM CDTSevere Thunderstorm WarningLZK67 min
Jun 11, 12:30 AM CDTSevere Thunderstorm WarningLZK60 min
Jun 11, 12:41 AM CDTSevere Thunderstorm WarningLZK49 min
Jun 11, 1:40 AM CDTMesoscale DiscussionSPC35 min
Jun 12, 11:35 AM CDTSevere Thunderstorm Watch PDSSPC9 hr
Jun 12, 1:30 PM CDTMesoscale DiscussionSPC90 min
Jun 12, 3:22 PM CDTMesoscale DiscussionSPC83 min
Jun 12, 11:10 PM CDTMesoscale DiscussionSPC65 min
Jun 12, 11:53 PM CDTSevere Thunderstorm WatchSPC4 hr
Jun 13, 3:25 AM CDTMesoscale DiscussionSPC65 min
Jun 13, 5:52 PM CDTSevere Thunderstorm WatchSPC4 hr
Jun 14, 1:51 AM CDTSevere Thunderstorm WatchSPC4 hr
Jun 14, 5:26 AM CDTMesoscale DiscussionSPC94 min
Jun 24, 3:44 AM CDTHeat AdvisoryLZK15 hr
Jun 26, 3:18 AM CDTHeat AdvisoryLZK40 hr
Jun 28, 5:08 PM CDTSevere Thunderstorm WarningLZK49 min
Jun 30, 1:54 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 30, 6:14 PM CDTMesoscale DiscussionSPC2 hr
Jun 30, 8:12 PM CDTMesoscale DiscussionSPC63 min
Jun 30, 8:25 PM CDTSevere Thunderstorm WarningLZK50 min
Jun 30, 8:29 PM CDTSevere Thunderstorm WarningLZK46 min
Jul 12, 3:43 AM CDTHeat AdvisoryLZK4 days
Jul 16, 4:00 AM CDTHeat AdvisoryLZK14 hr
Jul 16, 2:19 PM CDTMesoscale DiscussionSPC56 min
Jul 16, 3:33 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 16, 5:54 PM CDTSevere Thunderstorm WarningLZK51 min
Jul 16, 6:32 PM CDTMesoscale DiscussionSPC88 min
Jul 16, 6:44 PM CDTSevere Thunderstorm WarningLZK61 min
Jul 20, 4:03 PM CDTSevere Thunderstorm WarningLZK57 min
Jul 21, 3:53 PM CDTSevere Thunderstorm WarningLZK52 min
Jul 27, 2:48 PM CDTFlash Flood WatchLZK20 hr
Jul 28, 5:57 AM CDTMesoscale DiscussionSPC78 min
Jul 29, 4:48 AM CDTFlash Flood WatchLZK38 hr
Jul 30, 9:11 AM CDTRiver Flood WarningLZK8 days
Jul 31, 9:40 AM CDTRiver Flood WarningLZK11 days
Aug 1, 10:35 AM CDTFlash Flood WatchLZK8 hr
Aug 5, 8:10 AM CDTSevere Thunderstorm WarningLZK50 min
Aug 20, 7:29 PM CDTMesoscale DiscussionSPC91 min
Aug 20, 9:57 PM CDTSevere Thunderstorm WatchSPC6 hr
Sep 11, 2:42 PM CDTFlash Flood WatchLZK47 hr
Sep 15, 3:44 AM CDTFlash Flood WatchLZK3 days
Sep 16, 9:23 AM CDTRiver Flood AdvisoryLZK22 hr
Sep 17, 3:45 AM CDTFlash Flood WarningLZK60 min
Sep 17, 9:23 AM CDTRiver Flood WarningLZK7 days
Sep 17, 9:23 AM CDTRiver Flood WarningLZK13 days
Sep 17, 4:29 PM CDTFlash Flood WarningLZK3 hr
Sep 17, 4:46 PM CDTFlash Flood WarningLZK3 hr
Sep 17, 7:29 PM CDTFlash Flood WarningLZK3 hr
Sep 17, 10:28 PM CDTFlash Flood WarningLZK3 hr
Sep 18, 1:20 AM CDTAreal Flood WarningLZK3 hr
Oct 1, 6:29 PM CDTSevere Thunderstorm WatchSPC8 hr
Oct 1, 8:37 PM CDTMesoscale DiscussionSPC83 min
Oct 1, 9:02 PM CDTSevere Thunderstorm WarningLZK43 min
Oct 5, 9:22 AM CDTRiver Flood WarningLZK39 days
Oct 5, 9:22 AM CDTRiver Flood WarningLZK75 days
Oct 7, 4:57 AM CDTFlash Flood WatchLZK56 hr
Oct 9, 6:59 AM CDTMesoscale DiscussionSPC3 hr
Oct 9, 8:24 AM CDTMesoscale DiscussionSPC66 min
Oct 9, 8:36 AM CDTTornado WatchSPC4 hr
Oct 9, 8:50 AM CDTSevere Thunderstorm WarningLZK55 min
Oct 9, 9:42 AM CDTSevere Thunderstorm WarningLZK63 min
Oct 12, 10:19 PM CDTDense Fog AdvisoryLZK11 hr
Oct 13, 9:46 AM CDTFlash Flood WarningLZK11 hr
Oct 13, 10:22 AM CDTFlash Flood WatchLZK9 hr
Oct 13, 12:19 PM CDTMesoscale DiscussionSPC116 min
Oct 13, 7:04 PM CDTFlash Flood WatchLZK3 hr
Oct 15, 2:15 AM CDTMesoscale DiscussionSPC3 hr
Oct 15, 5:39 AM CDTMesoscale DiscussionSPC3 hr
Oct 21, 2:51 PM CDTFlash Flood WatchLZK30 hr
Oct 28, 4:06 AM CDTFlash Flood WatchLZK59 hr
Oct 29, 1:51 PM CDTTornado WatchSPC7 hr
Oct 29, 2:08 PM CDTSevere Thunderstorm WarningLZK37 min
Oct 29, 3:03 PM CDTMesoscale DiscussionSPC117 min
Oct 29, 3:10 PM CDTTornado WarningLZK50 min
Oct 29, 3:52 PM CDTTornado WarningLZK38 min
Oct 29, 5:26 PM CDTFlash Flood WarningLZK4 hr
Oct 29, 7:05 PM CDTMesoscale DiscussionSPC55 min
Oct 29, 7:12 PM CDTFlash Flood WarningLZK6 hr
Oct 29, 9:07 PM CDTMesoscale DiscussionSPC53 min
Oct 29, 10:03 PM CDTSevere Thunderstorm WarningLZK42 min
Oct 29, 10:30 PM CDTMesoscale DiscussionSPC60 min
Oct 29, 11:08 PM CDTFlash Flood WarningLZK7 hr
Oct 30, 12:55 AM CDTFlash Flood WarningLZK5 hr
Oct 30, 6:05 AM CDTAreal Flood WarningLZK12 hr
Nov 26, 1:36 PM CSTFreeze WarningLZK19 hr
Nov 29, 5:30 PM CSTMesoscale DiscussionSPC90 min
Dec 8, 4:09 AM CSTLake Wind AdvisoryLZK36 hr
Dec 8, 9:43 AM CSTMesoscale DiscussionSPC2 hr
Dec 13, 12:02 AM CSTDense Fog AdvisoryLZK10 hr
Dec 22, 3:21 PM CSTFlash Flood WatchLZK49 hr
Dec 23, 3:20 AM CSTLake Wind AdvisoryLZK60 hr
Dec 23, 11:07 AM CSTRiver Flood WarningLZK6 days
Dec 23, 11:07 AM CSTRiver Flood WarningLZK15 days
Dec 24, 3:30 AM CSTMesoscale DiscussionSPC2 hr
Dec 24, 6:34 AM CSTAreal Flood WarningLZK4 hr
Dec 24, 9:49 AM CSTFlash Flood WarningLZK4 hr
Dec 24, 10:45 AM CSTAreal Flood WarningLZK3 hr
Dec 24, 6:06 PM CSTAreal Flood WarningLZK14 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 archive20082010

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.