Alert archive / Arkansas / Sebastian County

Weather alerts in Sebastian County, Arkansas, 2017

142 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Sebastian County and its neighbors

Each county as a circle sized by its count in 2017. Tap one for its archive.

Alerts: 142
Warnings: 46
Watches: 24
Advisories: 4
Busiest month: April37 alerts
Busiest day: April 21, 201710 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 2 tornado warnings covering Sebastian County in 2017 had a tornado report inside them.

Sebastian County, 2017

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	1	50%	0
Severe thunderstorm warnings	37	23	38%	24	92%	22 min
Flash flood warnings	3	1	67%	0

Each office's whole area, 2017

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Tulsa, OK: tornado warnings	47	17	64%	39	74%	13 min
NWS Tulsa, OK: severe thunderstorm warnings	469	232	51%	556	83%	25 min
NWS Tulsa, OK: flash flood warnings	53	28	47%	76	82%	152 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 21, 8:52 PM CST	Special Weather Statement	TSA	38 min
Feb 28, 3:40 PM CST	Tornado Watch	SPC	6 hr
Feb 28, 10:46 PM CST	Mesoscale Discussion	SPC	119 min
Feb 28, 11:35 PM CST	Tornado Watch	SPC	5 hr
Mar 1, 12:47 AM CST	Severe Thunderstorm Warning	TSA	43 min
Mar 1, 1:09 AM CST	Severe Thunderstorm Warning	TSA	36 min
Mar 1, 1:27 AM CST	Special Weather Statement	TSA	33 min
Mar 6, 6:02 PM CST	Mesoscale Discussion	SPC	58 min
Mar 6, 6:51 PM CST	Tornado Watch	SPC	8 hr
Mar 6, 8:10 PM CST	Mesoscale Discussion	SPC	3 hr
Mar 6, 9:16 PM CST	Mesoscale Discussion	SPC	119 min
Mar 7, 12:28 AM CST	Severe Thunderstorm Warning	TSA	47 min
Mar 7, 12:51 AM CST	Severe Thunderstorm Warning	TSA	39 min
Mar 7, 1:11 AM CST	Severe Thunderstorm Warning	TSA	49 min
Mar 7, 1:28 AM CST	Severe Thunderstorm Warning	TSA	47 min
Mar 9, 3:52 PM CST	Severe Thunderstorm Watch	SPC	7 hr
Mar 9, 9:30 PM CST	Mesoscale Discussion	SPC	90 min
Mar 24, 3:25 PM CDT	Mesoscale Discussion	SPC	95 min
Mar 24, 3:30 PM CDT	Special Weather Statement	TSA	45 min
Mar 24, 4:01 PM CDT	Special Weather Statement	TSA	44 min
Mar 24, 6:29 PM CDT	Special Weather Statement	TSA	46 min
Mar 24, 7:03 PM CDT	Severe Thunderstorm Warning	TSA	42 min
Mar 26, 8:49 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Mar 26, 10:08 PM CDT	Special Weather Statement	TSA	67 min
Mar 26, 10:20 PM CDT	Severe Thunderstorm Warning	TSA	25 min
Mar 26, 10:44 PM CDT	Severe Thunderstorm Warning	TSA	46 min
Mar 29, 7:29 AM CDT	Special Weather Statement	TSA	31 min
Mar 29, 4:17 PM CDT	Tornado Watch	SPC	8 hr
Apr 4, 2:31 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Apr 4, 6:34 PM CDT	Mesoscale Discussion	SPC	56 min
Apr 4, 7:18 PM CDT	Special Weather Statement	TSA	57 min
Apr 4, 8:15 PM CDT	Severe Thunderstorm Warning	TSA	60 min
Apr 4, 9:28 PM CDT	Mesoscale Discussion	SPC	92 min
Apr 5, 9:10 PM CDT	Special Weather Statement	TSA	35 min
Apr 21, 6:22 AM CDT	Severe Thunderstorm Warning	TSA	38 min
Apr 21, 7:00 AM CDT	Severe Thunderstorm Warning	TSA	30 min
Apr 21, 9:45 AM CDT	Mesoscale Discussion	SPC	2 hr
Apr 21, 10:04 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 21, 12:16 PM CDT	Severe Thunderstorm Warning	TSA	44 min
Apr 21, 12:38 PM CDT	Severe Thunderstorm Warning	TSA	52 min
Apr 21, 1:12 PM CDT	Mesoscale Discussion	SPC	93 min
Apr 21, 1:29 PM CDT	Special Weather Statement	TSA	31 min
Apr 21, 3:54 PM CDT	Mesoscale Discussion	SPC	66 min
Apr 21, 4:40 PM CDT	Tornado Watch	SPC	8 hr
Apr 21, 7:11 PM CDT	Mesoscale Discussion	SPC	94 min
Apr 25, 11:27 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 26, 1:42 AM CDT	Mesoscale Discussion	SPC	2 hr
Apr 26, 5:37 AM CDT	Mesoscale Discussion	SPC	113 min
Apr 26, 6:00 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 26, 7:29 AM CDT	Mesoscale Discussion	SPC	2 hr
Apr 26, 7:50 AM CDT	Severe Thunderstorm Warning	TSA	25 min
Apr 26, 7:51 AM CDT	Areal Flood Advisory	TSA	3 hr
Apr 26, 8:14 AM CDT	Severe Thunderstorm Warning	TSA	31 min
Apr 26, 8:38 AM CDT	Severe Thunderstorm Warning	TSA	37 min
Apr 26, 3:00 PM CDT	River Flood Warning	TSA	22 hr
Apr 28, 11:39 AM CDT	River Flood Warning	TSA	3 days
Apr 28, 6:28 PM CDT	Mesoscale Discussion	SPC	3 hr
Apr 28, 10:01 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Apr 28, 10:25 PM CDT	Tornado Warning	TSA	35 min
Apr 28, 10:58 PM CDT	Tornado Warning	TSA	31 min
Apr 29, 12:36 PM CDT	Flash Flood Warning	TSA	6 hr
Apr 29, 1:11 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 29, 1:20 PM CDT	Special Weather Statement	TSA	25 min
Apr 29, 5:36 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 29, 6:19 PM CDT	Flash Flood Warning	TSA	10 hr
May 3, 8:25 AM CDT	Severe Thunderstorm Warning	TSA	35 min
May 3, 8:52 AM CDT	Severe Thunderstorm Warning	TSA	23 min
May 3, 9:11 AM CDT	Severe Thunderstorm Warning	TSA	49 min
May 11, 12:56 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
May 11, 2:28 PM CDT	Severe Thunderstorm Warning	TSA	32 min
May 11, 2:49 PM CDT	Mesoscale Discussion	SPC	116 min
May 11, 3:00 PM CDT	Severe Thunderstorm Warning	TSA	30 min
May 11, 5:49 PM CDT	Mesoscale Discussion	SPC	56 min
May 17, 7:25 AM CDT	Special Weather Statement	TSA	35 min
May 18, 9:41 PM CDT	Mesoscale Discussion	SPC	94 min
May 18, 10:58 PM CDT	Tornado Watch	SPC	6 hr
May 18, 11:48 PM CDT	Severe Thunderstorm Warning	TSA	42 min
May 18, 11:58 PM CDT	Severe Thunderstorm Warning	TSA	62 min
May 19, 12:08 AM CDT	Severe Thunderstorm Warning	TSA	67 min
May 19, 3:26 PM CDT	Tornado Watch	SPC	11 hr
May 19, 6:56 PM CDT	Mesoscale Discussion	SPC	2 hr
May 19, 9:16 PM CDT	Mesoscale Discussion	SPC	59 min
May 19, 9:42 PM CDT	Tornado Watch	SPC	7 hr
May 19, 11:51 PM CDT	Mesoscale Discussion	SPC	114 min
May 20, 4:19 AM CDT	Flash Flood Warning	TSA	4 hr
May 20, 8:55 AM CDT	Areal Flood Warning	TSA	36 hr
May 20, 9:47 AM CDT	River Flood Warning	TSA	3 days
May 27, 4:01 PM CDT	Tornado Watch	SPC	10 hr
May 27, 11:40 PM CDT	Severe Thunderstorm Warning	TSA	35 min
May 27, 11:47 PM CDT	Mesoscale Discussion	SPC	58 min
May 28, 12:06 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 28, 12:58 AM CDT	Severe Thunderstorm Warning	TSA	32 min
May 28, 2:53 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 15, 7:07 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 16, 12:07 AM CDT	Severe Thunderstorm Warning	TSA	53 min
Jun 16, 12:57 AM CDT	Special Weather Statement	TSA	48 min
Jun 17, 9:28 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 18, 4:14 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 18, 8:05 AM CDT	Mesoscale Discussion	SPC	115 min
Jun 18, 8:38 AM CDT	Severe Thunderstorm Warning	TSA	37 min
Jun 18, 9:08 AM CDT	Severe Thunderstorm Warning	TSA	67 min
Jun 18, 9:14 AM CDT	Severe Thunderstorm Warning	TSA	46 min
Jun 23, 12:22 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 23, 3:32 PM CDT	Mesoscale Discussion	SPC	118 min
Jun 30, 7:10 AM CDT	Special Weather Statement	TSA	50 min
Jun 30, 7:57 AM CDT	Special Weather Statement	TSA	48 min
Jun 30, 3:42 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 30, 6:27 PM CDT	Mesoscale Discussion	SPC	93 min
Jun 30, 7:55 PM CDT	Severe Thunderstorm Warning	TSA	50 min
Jun 30, 8:40 PM CDT	Severe Thunderstorm Warning	TSA	50 min
Jul 2, 3:53 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 7:58 PM CDT	Special Weather Statement	TSA	32 min
Jul 2, 9:57 PM CDT	Special Weather Statement	TSA	33 min
Jul 2, 10:26 PM CDT	Special Weather Statement	TSA	34 min
Jul 4, 12:51 AM CDT	Mesoscale Discussion	SPC	114 min
Jul 8, 4:04 AM CDT	Special Weather Statement	TSA	41 min
Jul 8, 4:30 AM CDT	Areal Flood Advisory	TSA	3 hr
Jul 8, 5:09 AM CDT	Special Weather Statement	TSA	21 min
Jul 8, 6:14 AM CDT	Special Weather Statement	TSA	46 min
Jul 8, 6:34 AM CDT	Severe Thunderstorm Warning	TSA	41 min
Jul 8, 7:14 AM CDT	Special Weather Statement	TSA	31 min
Jul 23, 3:15 PM CDT	Mesoscale Discussion	SPC	3 hr
Aug 6, 4:50 AM CDT	Special Weather Statement	TSA	40 min
Aug 6, 5:27 AM CDT	Special Weather Statement	TSA	48 min
Aug 11, 8:26 AM CDT	Special Weather Statement	TSA	34 min
Aug 15, 3:56 AM CDT	Areal Flood Advisory	TSA	3 hr
Aug 17, 2:16 AM CDT	Areal Flood Advisory	TSA	5 hr
Aug 20, 5:47 PM CDT	Special Weather Statement	TSA	43 min
Aug 20, 6:30 PM CDT	Special Weather Statement	TSA	45 min
Oct 21, 10:42 PM CDT	Mesoscale Discussion	SPC	93 min
Oct 21, 11:56 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Oct 22, 12:46 AM CDT	Severe Thunderstorm Warning	TSA	29 min
Oct 22, 1:08 AM CDT	Severe Thunderstorm Warning	TSA	37 min
Oct 22, 1:42 AM CDT	Severe Thunderstorm Warning	TSA	33 min
Oct 22, 1:44 AM CDT	Mesoscale Discussion	SPC	91 min
Nov 6, 6:49 AM CST	Mesoscale Discussion	SPC	116 min
Dec 4, 1:26 PM CST	Mesoscale Discussion	SPC	94 min
Dec 4, 3:39 PM CST	Severe Thunderstorm Watch	SPC	5 hr
Dec 4, 5:34 PM CST	Mesoscale Discussion	SPC	86 min
Dec 4, 6:37 PM CST	Special Weather Statement	TSA	38 min
Dec 4, 6:43 PM CST	Special Weather Statement	LZK	47 min
Dec 4, 7:01 PM CST	Special Weather Statement	TSA	29 min

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	37
Tornado Warning	2
Severe Thunderstorm Watch	15
Tornado Watch	9
Mesoscale Discussion	38
Special Weather Statement	30
Flooding
Areal Flood Warning	1
Flash Flood Warning	3
River Flood Warning	3
Areal Flood Advisory	4

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2016 2018

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.