Alert archive / Arkansas / Columbia County

Weather alerts in Columbia County, Arkansas, 2015

160 weather alerts in 2015, 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 2015. Tap one for its archive.

Alerts: 160
Warnings: 52
Watches: 32
Advisories: 29
Busiest month: May31 alerts
Busiest day: December 28, 20158 alerts

Over time

By month

Warning verification

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

2 of 5 tornado warnings covering Columbia County in 2015 had a tornado report inside them.

Columbia County, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	5	2	60%	0
Severe thunderstorm warnings	20	15	25%	6	100%	25 min
Flash flood warnings	8	6	25%	1	100%	68 min

Each office's whole area, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Shreveport, LA: tornado warnings	103	20	81%	42	55%	11 min
NWS Shreveport, LA: severe thunderstorm warnings	270	164	39%	438	72%	24 min
NWS Shreveport, LA: flash flood warnings	115	80	30%	274	89%	96 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.

Issued	Product	Office	Lasted
Jan 2, 3:42 PM CST	Flash Flood Watch	SHV	24 hr
Jan 3, 9:14 AM CST	River Flood Warning	SHV	11 days
Jan 6, 8:35 PM CST	Lake Wind Advisory	SHV	21 hr
Jan 7, 5:16 AM CST	Hard Freeze Warning	SHV	28 hr
Jan 10, 2:32 PM CST	Winter Weather Advisory	SHV	18 hr
Jan 24, 4:24 PM CST	Lake Wind Advisory	SHV	26 hr
Feb 1, 11:16 AM CST	Lake Wind Advisory	SHV	17 hr
Feb 14, 6:30 AM CST	Winter Storm Watch	SHV	24 hr
Feb 19, 3:49 PM CST	Freezing Rain Advisory	SHV	8 hr
Feb 20, 12:05 AM CST	Freezing Rain Advisory	SHV	3 hr
Feb 21, 4:02 PM CST	Winter Storm Watch	SHV	13 hr
Feb 22, 4:42 AM CST	Winter Storm Warning	SHV	17 hr
Feb 22, 2:34 PM CST	Lake Wind Advisory	SHV	8 hr
Feb 22, 9:42 PM CST	Winter Storm Warning	SHV	26 hr
Feb 23, 11:01 AM CST	River Flood Warning	SHV	38 days
Feb 24, 4:36 AM CST	Winter Storm Watch	SHV	5 hr
Feb 24, 10:00 AM CST	Winter Storm Warning	SHV	30 hr
Feb 25, 3:32 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 25, 1:42 PM CST	Mesoscale Discussion	SPC	3 hr
Feb 25, 4:12 PM CST	Winter Weather Advisory	SHV	108 min
Mar 2, 9:48 PM CST	Dense Fog Advisory	SHV	12 hr
Mar 3, 3:05 AM CST	Winter Storm Watch	SHV	24 hr
Mar 4, 3:28 AM CST	Winter Storm Warning	SHV	31 hr
Mar 4, 3:35 AM CST	Lake Wind Advisory	SHV	36 hr
Mar 12, 8:52 AM CDT	Flash Flood Warning	SHV	4 hr
Mar 12, 9:58 AM CDT	Flash Flood Watch	SHV	31 hr
Mar 12, 2:29 PM CDT	Flash Flood Warning	SHV	4 hr
Mar 13, 4:19 AM CDT	Areal Flood Advisory	SHV	3 hr
Mar 13, 7:16 AM CDT	Areal Flood Advisory	SHV	4 hr
Mar 19, 3:45 PM CDT	Flash Flood Watch	SHV	56 hr
Mar 20, 2:02 PM CDT	Flash Flood Watch	SHV	25 hr
Apr 2, 3:50 AM CDT	Lake Wind Advisory	SHV	15 hr
Apr 3, 5:29 AM CDT	Lake Wind Advisory	SHV	9 hr
Apr 9, 2:15 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 9, 3:06 PM CDT	Tornado Watch	SPC	7 hr
Apr 9, 3:25 PM CDT	Severe Thunderstorm Warning	SHV	50 min
Apr 9, 4:26 PM CDT	Severe Thunderstorm Warning	SHV	34 min
Apr 9, 8:26 PM CDT	Mesoscale Discussion	SPC	94 min
Apr 9, 9:23 PM CDT	Mesoscale Discussion	SPC	67 min
Apr 13, 4:28 AM CDT	River Flood Warning	SHV	23 days
Apr 19, 1:52 PM CDT	Mesoscale Discussion	SPC	53 min
Apr 19, 2:31 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 19, 4:45 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 19, 5:46 PM CDT	Tornado Watch	SPC	6 hr
Apr 19, 7:09 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 19, 8:05 PM CDT	Special Weather Statement	SHV	40 min
Apr 19, 9:41 PM CDT	Mesoscale Discussion	SPC	64 min
Apr 22, 2:02 PM CDT	Severe Thunderstorm Warning	SHV	43 min
Apr 22, 3:07 PM CDT	Severe Thunderstorm Warning	SHV	53 min
Apr 24, 3:58 PM CDT	Mesoscale Discussion	SPC	92 min
Apr 24, 4:45 PM CDT	Tornado Watch	SPC	5 hr
Apr 24, 7:46 PM CDT	Mesoscale Discussion	SPC	89 min
Apr 24, 9:20 PM CDT	Flash Flood Warning	SHV	3 hr
Apr 24, 9:20 PM CDT	Mesoscale Discussion	SPC	55 min
Apr 24, 9:59 PM CDT	Tornado Watch	SPC	4 hr
Apr 24, 10:17 PM CDT	Severe Thunderstorm Warning	SHV	43 min
Apr 25, 4:31 AM CDT	Lake Wind Advisory	SHV	11 hr
Apr 26, 6:09 PM CDT	Mesoscale Discussion	SPC	66 min
May 8, 10:34 AM CDT	River Flood Warning	SHV	32 days
May 9, 4:26 AM CDT	Flash Flood Watch	SHV	51 hr
May 9, 2:40 PM CDT	Tornado Watch	SPC	7 hr
May 9, 5:06 PM CDT	Mesoscale Discussion	SPC	54 min
May 9, 5:52 PM CDT	Mesoscale Discussion	SPC	83 min
May 9, 8:10 PM CDT	Tornado Warning	SHV	50 min
May 9, 8:46 PM CDT	Mesoscale Discussion	SPC	59 min
May 10, 6:15 PM CDT	Mesoscale Discussion	SPC	90 min
May 10, 7:08 PM CDT	Mesoscale Discussion	SPC	97 min
May 10, 9:57 PM CDT	Mesoscale Discussion	SPC	93 min
May 10, 11:31 PM CDT	Tornado Watch	SPC	5 hr
May 11, 2:35 AM CDT	Special Weather Statement	SHV	40 min
May 16, 4:33 PM CDT	Special Weather Statement	SHV	42 min
May 16, 4:43 PM CDT	Severe Thunderstorm Warning	SHV	47 min
May 17, 4:22 PM CDT	Flash Flood Watch	SHV	24 hr
May 23, 4:49 AM CDT	Flash Flood Watch	SHV	71 hr
May 24, 12:05 PM CDT	Mesoscale Discussion	SPC	115 min
May 24, 12:34 PM CDT	Tornado Watch	SPC	6 hr
May 24, 2:00 PM CDT	Severe Thunderstorm Warning	SHV	30 min
May 25, 5:15 PM CDT	Mesoscale Discussion	SPC	90 min
May 25, 5:51 PM CDT	Tornado Watch	SPC	6 hr
May 25, 6:20 PM CDT	Severe Thunderstorm Warning	SHV	55 min
May 25, 7:03 PM CDT	Flash Flood Warning	SHV	4 hr
May 25, 7:18 PM CDT	Severe Thunderstorm Warning	SHV	42 min
May 28, 1:32 PM CDT	Special Weather Statement	SHV	43 min
May 28, 1:51 PM CDT	Special Weather Statement	SHV	24 min
May 28, 3:10 PM CDT	Areal Flood Advisory	SHV	3 hr
May 29, 12:33 PM CDT	Mesoscale Discussion	SPC	87 min
May 29, 5:41 PM CDT	Severe Thunderstorm Warning	SHV	64 min
May 29, 6:30 PM CDT	Severe Thunderstorm Warning	SHV	45 min
May 30, 11:11 AM CDT	Areal Flood Advisory	SHV	2 hr
Jun 16, 5:16 PM CDT	Special Weather Statement	SHV	44 min
Jun 17, 2:22 PM CDT	Severe Thunderstorm Warning	SHV	38 min
Jun 17, 3:02 PM CDT	Severe Thunderstorm Warning	SHV	43 min
Jun 17, 9:34 PM CDT	Flash Flood Watch	SHV	21 hr
Jun 18, 11:20 AM CDT	River Flood Warning	SHV	5 days
Jun 18, 6:45 PM CDT	Special Weather Statement	SHV	60 min
Jun 18, 7:19 PM CDT	Severe Thunderstorm Warning	SHV	56 min
Jun 18, 7:54 PM CDT	Flash Flood Watch	SHV	8 hr
Jul 3, 2:58 PM CDT	Mesoscale Discussion	SPC	3 hr
Jul 4, 4:54 AM CDT	Flash Flood Watch	SHV	14 hr
Jul 4, 7:54 AM CDT	Flash Flood Warning	SHV	4 hr
Jul 4, 12:35 PM CDT	Flash Flood Warning	SHV	3 hr
Jul 9, 11:05 AM CDT	River Flood Warning	SHV	5 days
Jul 13, 3:06 AM CDT	Heat Advisory	SHV	40 hr
Jul 15, 2:57 AM CDT	Heat Advisory	SHV	7 days
Jul 23, 2:23 AM CDT	Heat Advisory	SHV	17 hr
Jul 24, 4:01 PM CDT	Heat Advisory	SHV	6 days
Aug 5, 4:28 AM CDT	Heat Advisory	SHV	15 hr
Aug 5, 3:50 PM CDT	Heat Advisory	SHV	6 days
Aug 8, 5:19 AM CDT	Excessive Heat Warning	SHV	13 hr
Aug 9, 5:19 AM CDT	Excessive Heat Warning	SHV	14 hr
Aug 19, 2:45 PM CDT	Mesoscale Discussion	SPC	3 hr
Aug 23, 10:31 AM CDT	Special Weather Statement	SHV	44 min
Aug 23, 11:24 AM CDT	Special Weather Statement	SHV	51 min
Oct 15, 3:28 PM CDT	Fire Weather Watch	SHV	3 days
Oct 25, 5:16 AM CDT	Lake Wind Advisory	SHV	29 hr
Oct 30, 3:00 PM CDT	Flash Flood Watch	SHV	25 hr
Nov 11, 2:52 PM CST	Mesoscale Discussion	SPC	113 min
Nov 11, 6:41 PM CST	Mesoscale Discussion	SPC	2 hr
Nov 16, 3:35 AM CST	Flash Flood Watch	SHV	42 hr
Nov 16, 3:25 PM CST	Lake Wind Advisory	SHV	27 hr
Nov 17, 8:24 AM CST	Mesoscale Discussion	SPC	66 min
Nov 17, 8:55 AM CST	Tornado Watch	SPC	7 hr
Nov 17, 9:59 AM CST	Mesoscale Discussion	SPC	2 hr
Nov 17, 10:39 AM CST	Areal Flood Warning	SHV	2 hr
Nov 17, 10:42 AM CST	Severe Thunderstorm Warning	SHV	63 min
Nov 17, 11:43 AM CST	Severe Thunderstorm Warning	SHV	62 min
Nov 18, 6:14 AM CST	River Flood Warning	SHV	8 days
Nov 20, 2:55 PM CST	Lake Wind Advisory	SHV	25 hr
Nov 21, 5:59 AM CST	Freeze Warning	SHV	27 hr
Nov 30, 7:03 AM CST	River Flood Warning	SHV	10 days
Dec 12, 4:27 AM CST	Lake Wind Advisory	SHV	36 hr
Dec 13, 9:58 AM CST	Severe Thunderstorm Warning	SHV	62 min
Dec 13, 7:24 PM CST	River Flood Warning	SHV	10 days
Dec 22, 10:17 PM CST	Mesoscale Discussion	SPC	2 hr
Dec 23, 12:06 AM CST	Tornado Watch	SPC	7 hr
Dec 23, 12:40 AM CST	Special Weather Statement	SHV	35 min
Dec 23, 12:49 AM CST	Special Weather Statement	SHV	26 min
Dec 23, 4:39 AM CST	Mesoscale Discussion	SPC	2 hr
Dec 23, 6:20 AM CST	Tornado Watch	SPC	7 hr
Dec 23, 10:12 AM CST	Mesoscale Discussion	SPC	93 min
Dec 24, 2:45 PM CST	Flash Flood Watch	SHV	4 days
Dec 24, 11:06 PM CST	Severe Thunderstorm Warning	SHV	54 min
Dec 25, 1:48 AM CST	Mesoscale Discussion	SPC	2 hr
Dec 25, 3:39 AM CST	Flash Flood Warning	SHV	4 hr
Dec 25, 5:33 PM CST	River Flood Warning	SHV	14 days
Dec 26, 10:43 AM CST	Lake Wind Advisory	SHV	7 hr
Dec 27, 12:47 PM CST	Mesoscale Discussion	SPC	88 min
Dec 27, 2:27 PM CST	Mesoscale Discussion	SPC	63 min
Dec 27, 2:47 PM CST	Tornado Watch	SPC	7 hr
Dec 27, 3:59 PM CST	Tornado Warning	SHV	31 min
Dec 27, 4:26 PM CST	Tornado Warning	SHV	34 min
Dec 27, 4:55 PM CST	Mesoscale Discussion	SPC	2 hr
Dec 27, 7:11 PM CST	Mesoscale Discussion	SPC	94 min
Dec 27, 8:33 PM CST	Tornado Warning	SHV	27 min
Dec 27, 8:57 PM CST	Tornado Warning	SHV	33 min
Dec 27, 9:46 PM CST	Flash Flood Warning	SHV	6 hr
Dec 27, 9:57 PM CST	Tornado Watch	SPC	7 hr
Dec 27, 10:57 PM CST	Severe Thunderstorm Warning	SHV	23 min
Dec 27, 11:42 PM CST	Severe Thunderstorm Warning	SHV	78 min
Dec 28, 12:19 AM CST	Lake Wind Advisory	SHV	15 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

Product	Alerts
Severe storms
Severe Thunderstorm Warning	20
Tornado Warning	5
Severe Thunderstorm Watch	1
Tornado Watch	13
Mesoscale Discussion	36
Special Weather Statement	11
Flooding
Areal Flood Warning	1
Flash Flood Warning	8
River Flood Warning	10
Flash Flood Watch	13
Areal Flood Advisory	4
Winter
Winter Storm Warning	4
Winter Storm Watch	4
Freezing Rain Advisory	2
Winter Weather Advisory	2
Heat
Excessive Heat Warning	2
Heat Advisory	6
Cold
Freeze Warning	1
Hard Freeze Warning	1
Wind and dust
Lake Wind Advisory	14
Fire
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	1

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2014 2016

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.