Alert archive / Arkansas / Sebastian County

Weather alerts in Sebastian County, Arkansas, 2009

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

Alerts: 170
Warnings: 57
Watches: 27
Advisories: 11
Busiest month: May37 alerts
Busiest day: May 14, 20099 alerts

Over time

By month

Warning verification

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

0 of 1 tornado warnings covering Sebastian County in 2009 had a tornado report inside them.

Sebastian County, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	0
Severe thunderstorm warnings	48	25	48%	21	90%	36 min
Flash flood warnings	3	3	0%	4	50%	210 min

Each office's whole area, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Tulsa, OK: tornado warnings	39	6	85%	16	44%	21 min
NWS Tulsa, OK: severe thunderstorm warnings	526	231	56%	457	86%	31 min
NWS Tulsa, OK: flash flood warnings	60	38	37%	132	83%	186 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 26, 10:54 AM CST	Mesoscale Discussion	SPC	4 hr
Jan 26, 6:59 PM CST	Mesoscale Discussion	SPC	5 hr
Jan 27, 6:06 AM CST	Mesoscale Discussion	SPC	5 hr
Jan 27, 12:16 PM CST	Mesoscale Discussion	SPC	6 hr
Jan 27, 3:04 PM CST	Areal Flood Advisory	TSA	4 hr
Feb 9, 8:46 AM CST	Special Weather Statement	TSA	59 min
Feb 10, 2:42 PM CST	Tornado Watch	SPC	7 hr
Feb 10, 8:34 PM CST	Mesoscale Discussion	SPC	86 min
Feb 10, 9:30 PM CST	Tornado Watch	SPC	7 hr
Feb 10, 11:00 PM CST	Special Weather Statement	TSA	75 min
Feb 10, 11:13 PM CST	Severe Thunderstorm Warning	TSA	62 min
Feb 10, 11:35 PM CST	Areal Flood Advisory	TSA	115 min
Feb 10, 11:44 PM CST	Severe Thunderstorm Warning	TSA	51 min
Feb 26, 5:56 PM CST	Mesoscale Discussion	SPC	94 min
Feb 26, 6:12 PM CST	Severe Thunderstorm Watch	SPC	8 hr
Feb 26, 6:35 PM CST	Severe Thunderstorm Warning	TSA	40 min
Feb 26, 6:38 PM CST	Severe Thunderstorm Warning	TSA	52 min
Feb 26, 7:14 PM CST	Severe Thunderstorm Warning	TSA	61 min
Feb 26, 7:42 PM CST	Mesoscale Discussion	SPC	93 min
Feb 26, 8:17 PM CST	Severe Thunderstorm Warning	TSA	28 min
Mar 24, 9:38 AM CDT	Mesoscale Discussion	SPC	97 min
Mar 24, 10:00 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Mar 24, 12:02 PM CDT	Mesoscale Discussion	SPC	88 min
Mar 24, 1:00 PM CDT	Severe Thunderstorm Warning	TSA	45 min
Mar 25, 4:13 PM CDT	Special Weather Statement	TSA	62 min
Mar 26, 4:15 PM CDT	Severe Thunderstorm Warning	TSA	45 min
Mar 26, 5:00 PM CDT	Severe Thunderstorm Warning	TSA	30 min
Mar 26, 5:14 PM CDT	Severe Thunderstorm Warning	TSA	31 min
Mar 26, 5:22 PM CDT	Severe Thunderstorm Warning	TSA	33 min
Mar 26, 6:52 PM CDT	Special Weather Statement	TSA	38 min
Mar 26, 7:23 PM CDT	Special Weather Statement	TSA	37 min
Mar 26, 7:38 PM CDT	Severe Thunderstorm Warning	TSA	25 min
Mar 27, 7:46 PM CDT	Tornado Warning	TSA	44 min
Mar 30, 11:46 PM CDT	Special Weather Statement	TSA	74 min
Mar 31, 12:08 AM CDT	Severe Thunderstorm Warning	TSA	67 min
Mar 31, 1:01 AM CDT	Special Weather Statement	TSA	59 min
Apr 2, 12:50 PM CDT	Mesoscale Discussion	SPC	85 min
Apr 4, 11:56 PM CDT	Mesoscale Discussion	SPC	94 min
Apr 5, 3:19 AM CDT	Special Weather Statement	TSA	26 min
Apr 5, 3:28 AM CDT	Severe Thunderstorm Warning	TSA	32 min
Apr 9, 1:44 PM CDT	Tornado Watch	SPC	7 hr
Apr 9, 5:39 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 9, 6:44 PM CDT	Severe Thunderstorm Warning	TSA	76 min
Apr 9, 6:59 PM CDT	Mesoscale Discussion	SPC	91 min
Apr 9, 7:49 PM CDT	Severe Thunderstorm Warning	TSA	45 min
Apr 18, 4:23 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Apr 19, 1:39 AM CDT	Special Weather Statement	TSA	51 min
Apr 24, 3:58 PM CDT	Mesoscale Discussion	SPC	92 min
Apr 28, 5:43 PM CDT	Mesoscale Discussion	SPC	62 min
Apr 29, 9:36 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 30, 1:55 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 30, 4:58 PM CDT	Special Weather Statement	TSA	32 min
Apr 30, 5:21 PM CDT	Special Weather Statement	TSA	39 min
Apr 30, 5:40 PM CDT	Severe Thunderstorm Warning	TSA	39 min
May 1, 7:26 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 1, 1:22 PM CDT	Mesoscale Discussion	SPC	53 min
May 1, 3:36 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 1, 6:11 PM CDT	Mesoscale Discussion	SPC	64 min
May 1, 9:05 PM CDT	River Flood Watch	TSA	21 hr
May 1, 9:36 PM CDT	Mesoscale Discussion	SPC	84 min
May 1, 9:56 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 2, 1:45 AM CDT	Mesoscale Discussion	SPC	90 min
May 2, 2:59 PM CDT	River Flood Warning	TSA	42 hr
May 2, 3:23 PM CDT	Areal Flood Advisory	TSA	112 min
May 4, 2:28 PM CDT	River Flood Advisory	TSA	44 hr
May 5, 8:53 PM CDT	Severe Thunderstorm Warning	TSA	52 min
May 5, 11:26 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 6, 2:00 AM CDT	Mesoscale Discussion	SPC	2 hr
May 6, 3:43 AM CDT	Areal Flood Advisory	TSA	62 min
May 6, 3:43 AM CDT	Special Weather Statement	TSA	32 min
May 6, 7:23 AM CDT	River Flood Warning	TSA	60 hr
May 8, 5:52 PM CDT	Tornado Watch	SPC	11 hr
May 8, 9:31 PM CDT	Mesoscale Discussion	SPC	89 min
May 8, 11:28 PM CDT	Severe Thunderstorm Warning	TSA	62 min
May 8, 11:34 PM CDT	Severe Thunderstorm Warning	TSA	56 min
May 9, 12:23 AM CDT	Severe Thunderstorm Warning	TSA	67 min
May 12, 9:10 AM CDT	Mesoscale Discussion	SPC	65 min
May 12, 6:12 PM CDT	Severe Thunderstorm Warning	TSA	48 min
May 13, 9:57 AM CDT	River Flood Watch	TSA	11 hr
May 13, 8:22 PM CDT	Mesoscale Discussion	SPC	53 min
May 13, 9:02 PM CDT	River Flood Warning	TSA	4 days
May 13, 9:36 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 13, 11:08 PM CDT	Severe Thunderstorm Warning	TSA	67 min
May 13, 11:27 PM CDT	Mesoscale Discussion	SPC	93 min
May 14, 12:04 AM CDT	Severe Thunderstorm Warning	TSA	56 min
May 14, 12:09 AM CDT	Severe Thunderstorm Warning	TSA	81 min
May 14, 1:00 AM CDT	Severe Thunderstorm Warning	TSA	30 min
May 14, 1:28 AM CDT	Areal Flood Advisory	TSA	92 min
May 16, 12:30 AM CDT	Special Weather Statement	TSA	30 min
May 16, 1:09 AM CDT	Severe Thunderstorm Warning	TSA	66 min
May 16, 1:37 AM CDT	Severe Thunderstorm Warning	TSA	30 min
Jun 3, 3:43 AM CDT	Special Weather Statement	TSA	62 min
Jun 3, 6:54 AM CDT	Special Weather Statement	TSA	66 min
Jun 10, 3:46 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 10, 6:31 PM CDT	Special Weather Statement	TSA	29 min
Jun 10, 6:39 PM CDT	Severe Thunderstorm Warning	TSA	66 min
Jun 10, 7:14 PM CDT	Severe Thunderstorm Warning	TSA	76 min
Jun 12, 6:23 AM CDT	Mesoscale Discussion	SPC	67 min
Jun 12, 7:46 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 12, 10:03 AM CDT	Mesoscale Discussion	SPC	87 min
Jun 12, 11:01 AM CDT	Mesoscale Discussion	SPC	89 min
Jun 12, 11:35 AM CDT	Severe Thunderstorm Watch PDS	SPC	9 hr
Jun 12, 12:05 PM CDT	Severe Thunderstorm Warning	TSA	55 min
Jun 12, 12:16 PM CDT	Severe Thunderstorm Warning	TSA	59 min
Jun 12, 12:41 PM CDT	Severe Thunderstorm Warning	TSA	47 min
Jun 12, 1:30 PM CDT	Mesoscale Discussion	SPC	90 min
Jun 12, 10:08 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 13, 3:25 AM CDT	Mesoscale Discussion	SPC	65 min
Jun 13, 10:33 PM CDT	Mesoscale Discussion	SPC	57 min
Jun 14, 1:20 AM CDT	Severe Thunderstorm Warning	TSA	53 min
Jun 14, 1:51 AM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 30, 12:53 PM CDT	Mesoscale Discussion	SPC	97 min
Jun 30, 1:54 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 30, 3:47 PM CDT	Mesoscale Discussion	SPC	58 min
Jun 30, 6:14 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 4, 11:52 AM CDT	Mesoscale Discussion	SPC	53 min
Jul 4, 12:22 PM CDT	Severe Thunderstorm Warning	TSA	53 min
Jul 4, 12:25 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 4, 12:29 PM CDT	Special Weather Statement	TSA	46 min
Jul 4, 6:20 PM CDT	Mesoscale Discussion	SPC	55 min
Jul 4, 7:20 PM CDT	Mesoscale Discussion	SPC	25 min
Jul 4, 7:42 PM CDT	Special Weather Statement	TSA	63 min
Jul 4, 9:00 PM CDT	Special Weather Statement	TSA	60 min
Jul 5, 12:13 AM CDT	Special Weather Statement	TSA	32 min
Jul 13, 3:25 PM CDT	Mesoscale Discussion	SPC	65 min
Jul 16, 2:19 PM CDT	Mesoscale Discussion	SPC	56 min
Jul 16, 3:33 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 21, 6:07 AM CDT	Severe Thunderstorm Warning	TSA	53 min
Jul 21, 6:48 AM CDT	Special Weather Statement	TSA	42 min
Aug 3, 2:41 PM CDT	Special Weather Statement	TSA	49 min
Aug 3, 3:46 PM CDT	Special Weather Statement	TSA	44 min
Aug 3, 4:08 PM CDT	Special Weather Statement	TSA	52 min
Aug 5, 3:41 PM CDT	Special Weather Statement	TSA	34 min
Aug 5, 4:10 PM CDT	Special Weather Statement	TSA	35 min
Aug 5, 4:17 PM CDT	Special Weather Statement	TSA	28 min
Aug 5, 4:31 PM CDT	Severe Thunderstorm Warning	TSA	44 min
Aug 5, 4:47 PM CDT	Areal Flood Advisory	TSA	58 min
Aug 5, 5:07 PM CDT	Severe Thunderstorm Warning	TSA	68 min
Aug 5, 5:28 PM CDT	Flash Flood Warning	TSA	6 hr
Aug 5, 5:34 PM CDT	Mesoscale Discussion	SPC	116 min
Aug 5, 6:09 PM CDT	Severe Thunderstorm Warning	TSA	66 min
Aug 5, 7:15 PM CDT	Severe Thunderstorm Warning	TSA	60 min
Aug 5, 8:01 PM CDT	Severe Thunderstorm Warning	TSA	29 min
Aug 5, 8:04 PM CDT	Severe Thunderstorm Warning	TSA	26 min
Aug 5, 8:27 PM CDT	Severe Thunderstorm Warning	TSA	17 min
Aug 10, 9:51 PM CDT	Special Weather Statement	TSA	54 min
Aug 17, 4:30 PM CDT	Areal Flood Advisory	TSA	60 min
Aug 20, 5:39 AM CDT	Severe Thunderstorm Warning	TSA	66 min
Aug 20, 6:17 AM CDT	Severe Thunderstorm Warning	TSA	58 min
Aug 20, 6:43 AM CDT	Severe Thunderstorm Warning	TSA	62 min
Aug 20, 7:26 AM CDT	Areal Flood Advisory	TSA	2 hr
Aug 20, 8:50 AM CDT	Flash Flood Warning	TSA	5 hr
Sep 10, 4:37 AM CDT	Areal Flood Advisory	TSA	113 min
Sep 10, 5:59 AM CDT	Areal Flood Advisory	TSA	2 hr
Sep 21, 1:26 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 21, 2:00 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Sep 21, 9:18 PM CDT	Severe Thunderstorm Warning	TSA	27 min
Sep 21, 9:37 PM CDT	Mesoscale Discussion	SPC	23 min
Oct 1, 12:44 PM CDT	Mesoscale Discussion	SPC	91 min
Oct 1, 1:16 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Oct 1, 5:12 PM CDT	Mesoscale Discussion	SPC	93 min
Oct 1, 5:25 PM CDT	Severe Thunderstorm Warning	TSA	65 min
Oct 6, 7:20 AM CDT	Special Weather Statement	TSA	55 min
Oct 8, 4:41 PM CDT	Tornado Watch	SPC	7 hr
Oct 8, 9:08 PM CDT	Flash Flood Warning	TSA	13 hr
Oct 8, 11:40 PM CDT	Mesoscale Discussion	SPC	95 min
Oct 9, 9:10 AM CDT	River Flood Warning	TSA	29 hr
Oct 9, 10:20 AM CDT	Areal Flood Warning	TSA	6 hr
Oct 29, 5:27 PM CDT	Tornado Watch	SPC	3 hr
Dec 23, 2:37 AM CST	Mesoscale Discussion	SPC	2 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	48
Tornado Warning	1
Severe Thunderstorm Watch	19
Tornado Watch	6
Mesoscale Discussion	46
Special Weather Statement	29
Flooding
Areal Flood Warning	1
Flash Flood Warning	3
River Flood Warning	4
River Flood Watch	2
Areal Flood Advisory	10
River Flood 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 2008 2010

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.