Alert archive / Arkansas / Jefferson County

Weather alerts in Jefferson County, Arkansas, 2012

185 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Jefferson County and its neighbors

Each county as a circle sized by its count in 2012. Tap one for its archive.

Alerts: 185
Warnings: 70
Watches: 18
Advisories: 49
Busiest month: January23 alerts
Busiest day: January 23, 201214 alerts

Over time

By month

Warning verification

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

6 of 10 tornado warnings covering Jefferson County in 2012 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 9 minutes after it went out.

Jefferson County, 2012

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	10	6	40%	2	100%	9 min
Severe thunderstorm warnings	46	20	57%	13	77%	18 min
Flash flood warnings	7	5	29%	4	100%	120 min

Each office's whole area, 2012

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Little Rock, AR: tornado warnings	30	10	67%	20	90%	21 min
NWS Little Rock, AR: severe thunderstorm warnings	509	224	56%	404	85%	21 min
NWS Little Rock, AR: flash flood warnings	35	12	66%	24	96%	140 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 11, 6:05 PM CST	Lake Wind Advisory	LZK	24 hr
Jan 13, 9:21 PM CST	Lake Wind Advisory	LZK	21 hr
Jan 16, 3:40 AM CST	Lake Wind Advisory	LZK	38 hr
Jan 20, 1:08 AM CST	Dense Fog Advisory	LZK	8 hr
Jan 22, 4:27 AM CST	Dense Fog Advisory	LZK	8 hr
Jan 22, 2:26 PM CST	Mesoscale Discussion	SPC	2 hr
Jan 22, 2:32 PM CST	Lake Wind Advisory	LZK	12 hr
Jan 22, 5:16 PM CST	Tornado Watch PDS	SPC	6 hr
Jan 22, 6:26 PM CST	Severe Thunderstorm Warning	LZK	49 min
Jan 22, 6:36 PM CST	Tornado Warning	LZK	24 min
Jan 22, 6:48 PM CST	Mesoscale Discussion	SPC	57 min
Jan 22, 6:58 PM CST	Tornado Warning	LZK	32 min
Jan 22, 7:25 PM CST	Tornado Warning Emergency	LZK	50 min
Jan 22, 7:29 PM CST	Tornado Warning	LZK	31 min
Jan 22, 7:34 PM CST	Severe Thunderstorm Warning	LZK	26 min
Jan 22, 7:44 PM CST	Severe Thunderstorm Warning	LZK	46 min
Jan 22, 7:48 PM CST	Tornado Warning	LZK	27 min
Jan 22, 8:02 PM CST	Tornado Warning	LZK	28 min
Jan 22, 8:13 PM CST	Tornado Warning	LZK	47 min
Jan 22, 8:24 PM CST	Severe Thunderstorm Warning	LZK	33 min
Jan 22, 8:27 PM CST	Tornado Warning	LZK	48 min
Jan 22, 8:37 PM CST	Mesoscale Discussion	SPC	83 min
Jan 31, 3:31 AM CST	Lake Wind Advisory	LZK	9 hr
Feb 1, 10:18 AM CST	Mesoscale Discussion	SPC	117 min
Feb 1, 12:37 PM CST	Severe Thunderstorm Watch	SPC	5 hr
Feb 1, 1:22 PM CST	Mesoscale Discussion	SPC	113 min
Feb 1, 2:35 PM CST	Severe Thunderstorm Warning	LZK	40 min
Feb 1, 2:55 PM CST	Severe Thunderstorm Warning	LZK	35 min
Feb 1, 2:58 PM CST	Mesoscale Discussion	SPC	2 hr
Feb 1, 3:23 PM CST	Severe Thunderstorm Warning	LZK	43 min
Feb 1, 3:25 PM CST	Severe Thunderstorm Warning	LZK	50 min
Feb 1, 3:48 PM CST	Severe Thunderstorm Warning	LZK	42 min
Feb 2, 12:37 AM CST	Dense Fog Advisory	LZK	8 hr
Feb 11, 4:08 AM CST	Lake Wind Advisory	LZK	14 hr
Feb 18, 4:06 PM CST	Lake Wind Advisory	LZK	11 hr
Feb 22, 2:13 PM CST	Lake Wind Advisory	LZK	52 hr
Feb 23, 10:02 PM CST	Lake Wind Advisory	LZK	20 hr
Feb 24, 4:38 AM CST	Red Flag Warning	LZK	13 hr
Feb 29, 12:49 AM CST	Mesoscale Discussion	SPC	56 min
Mar 2, 2:36 AM CST	Lake Wind Advisory	LZK	18 hr
Mar 2, 1:27 PM CST	Red Flag Warning	LZK	5 hr
Mar 3, 2:23 PM CST	Fire Weather Watch	LZK	14 hr
Mar 3, 2:39 PM CST	Lake Wind Advisory	LZK	27 hr
Mar 4, 4:11 AM CST	Red Flag Warning	LZK	14 hr
Mar 6, 4:00 AM CST	Lake Wind Advisory	LZK	14 hr
Mar 6, 4:29 AM CST	Red Flag Warning	LZK	14 hr
Mar 7, 3:19 AM CST	Lake Wind Advisory	LZK	15 hr
Mar 8, 3:10 PM CST	Lake Wind Advisory	LZK	6 hr
Mar 8, 7:57 PM CST	Areal Flood Advisory	LZK	95 days
Mar 18, 3:10 PM CDT	Flash Flood Watch	LZK	3 days
Mar 19, 4:10 AM CDT	Lake Wind Advisory	LZK	39 hr
Mar 20, 1:48 PM CDT	Mesoscale Discussion	SPC	117 min
Mar 20, 2:55 PM CDT	Tornado Watch	SPC	7 hr
Mar 20, 5:04 PM CDT	Severe Thunderstorm Warning	LZK	41 min
Mar 20, 8:09 PM CDT	Special Weather Statement	LZK	46 min
Mar 21, 2:08 AM CDT	Special Weather Statement	LZK	32 min
Mar 21, 3:33 AM CDT	Flash Flood Warning	LZK	6 hr
Mar 21, 4:24 AM CDT	River Flood Advisory	LZK	29 hr
Mar 21, 9:24 AM CDT	Flash Flood Warning	LZK	6 hr
Mar 21, 2:27 PM CDT	Lake Wind Advisory	LZK	6 hr
Mar 23, 2:45 PM CDT	River Flood Advisory	LZK	23 hr
Apr 2, 3:18 PM CDT	Mesoscale Discussion	SPC	117 min
Apr 2, 3:49 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 2, 4:56 PM CDT	Special Weather Statement	LZK	44 min
Apr 2, 5:58 PM CDT	Mesoscale Discussion	SPC	62 min
Apr 3, 10:48 AM CDT	Severe Thunderstorm Warning	LZK	16 min
Apr 13, 3:09 PM CDT	Lake Wind Advisory	LZK	52 hr
Apr 15, 4:22 PM CDT	Mesoscale Discussion	SPC	83 min
Apr 15, 4:25 PM CDT	Tornado Watch	SPC	6 hr
Apr 15, 7:28 PM CDT	Mesoscale Discussion	SPC	62 min
Apr 22, 3:40 AM CDT	Lake Wind Advisory	LZK	15 hr
Apr 24, 9:01 PM CDT	Lake Wind Advisory	LZK	22 hr
Apr 30, 1:55 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 30, 5:34 PM CDT	Severe Thunderstorm Warning	LZK	26 min
Apr 30, 5:58 PM CDT	Severe Thunderstorm Warning	LZK	32 min
Apr 30, 6:30 PM CDT	Severe Thunderstorm Warning	LZK	17 min
May 1, 1:26 PM CDT	Lake Wind Advisory	LZK	6 hr
May 7, 10:05 PM CDT	Special Weather Statement	LZK	45 min
May 7, 10:13 PM CDT	Severe Thunderstorm Warning	LZK	16 min
May 7, 11:14 PM CDT	Special Weather Statement	LZK	41 min
May 23, 9:59 PM CDT	Lake Wind Advisory	LZK	21 hr
May 30, 11:04 AM CDT	Special Weather Statement	LZK	46 min
May 31, 3:59 PM CDT	Special Weather Statement	LZK	46 min
Jun 3, 5:02 PM CDT	Mesoscale Discussion	SPC	88 min
Jun 4, 1:07 PM CDT	Mesoscale Discussion	SPC	113 min
Jun 4, 4:08 PM CDT	Severe Thunderstorm Warning	LZK	52 min
Jun 4, 4:26 PM CDT	Severe Thunderstorm Warning	LZK	49 min
Jun 4, 5:06 PM CDT	Mesoscale Discussion	SPC	114 min
Jun 11, 1:12 PM CDT	Mesoscale Discussion	SPC	93 min
Jun 11, 1:28 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 11, 3:29 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 11, 5:03 PM CDT	Severe Thunderstorm Warning	LZK	57 min
Jun 11, 5:05 PM CDT	Mesoscale Discussion	SPC	55 min
Jun 11, 5:13 PM CDT	Special Weather Statement	LZK	47 min
Jun 11, 5:38 PM CDT	Severe Thunderstorm Warning	LZK	52 min
Jun 28, 2:46 PM CDT	Heat Advisory	LZK	53 hr
Jul 7, 7:17 PM CDT	Special Weather Statement	LZK	48 min
Jul 7, 7:24 PM CDT	Severe Thunderstorm Warning	LZK	20 min
Jul 14, 6:01 PM CDT	Severe Thunderstorm Warning	LZK	44 min
Jul 14, 6:28 PM CDT	Severe Thunderstorm Warning	LZK	38 min
Jul 14, 7:24 PM CDT	Severe Thunderstorm Warning	LZK	51 min
Jul 14, 7:56 PM CDT	Severe Thunderstorm Warning	LZK	34 min
Jul 18, 2:18 PM CDT	Heat Advisory	LZK	53 hr
Jul 20, 8:18 PM CDT	Severe Thunderstorm Warning	LZK	42 min
Jul 20, 9:19 PM CDT	Severe Thunderstorm Warning	LZK	26 min
Jul 20, 9:46 PM CDT	Severe Thunderstorm Warning	LZK	29 min
Jul 21, 3:32 AM CDT	Heat Advisory	LZK	15 hr
Jul 21, 2:47 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 26, 2:59 AM CDT	Heat Advisory	LZK	15 hr
Jul 26, 5:27 PM CDT	Mesoscale Discussion	SPC	33 min
Jul 26, 5:46 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 28, 12:04 PM CDT	Heat Advisory	LZK	5 days
Jul 29, 3:01 AM CDT	Fire Weather Watch	LZK	40 hr
Jul 31, 2:56 AM CDT	Excessive Heat Watch	LZK	12 hr
Aug 5, 2:06 PM CDT	Mesoscale Discussion	SPC	54 min
Aug 5, 3:39 PM CDT	Severe Thunderstorm Warning	LZK	36 min
Aug 5, 4:12 PM CDT	Severe Thunderstorm Warning	LZK	48 min
Aug 6, 3:57 PM CDT	Severe Thunderstorm Warning	LZK	48 min
Aug 9, 5:32 PM CDT	Special Weather Statement	LZK	28 min
Aug 9, 5:57 PM CDT	Special Weather Statement	LZK	28 min
Aug 13, 1:45 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 13, 7:06 AM CDT	Special Weather Statement	LZK	44 min
Aug 16, 2:30 PM CDT	Severe Thunderstorm Warning	LZK	32 min
Aug 17, 11:07 PM CDT	Special Weather Statement	LZK	43 min
Aug 17, 11:20 PM CDT	Severe Thunderstorm Warning	LZK	25 min
Aug 17, 11:37 PM CDT	Severe Thunderstorm Warning	LZK	23 min
Aug 29, 3:38 AM CDT	Flash Flood Watch	LZK	65 hr
Aug 30, 2:01 AM CDT	Lake Wind Advisory	LZK	42 hr
Aug 30, 10:13 AM CDT	Lake Wind Advisory	LZK	33 hr
Aug 30, 10:13 AM CDT	Wind Advisory	LZK	9 hr
Aug 31, 5:10 AM CDT	Flash Flood Warning	LZK	3 hr
Aug 31, 7:59 AM CDT	Flash Flood Warning Emergency	LZK	3 hr
Aug 31, 10:51 AM CDT	Flash Flood Warning Emergency	LZK	6 hr
Aug 31, 11:06 AM CDT	Special Weather Statement	LZK	19 min
Aug 31, 6:24 PM CDT	Flash Flood Warning	LZK	3 hr
Aug 31, 7:02 PM CDT	Tornado Warning	LZK	28 min
Sep 1, 3:49 PM CDT	Tornado Watch	SPC	7 hr
Sep 1, 6:11 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 1, 6:29 PM CDT	Severe Thunderstorm Warning	LZK	46 min
Sep 1, 6:31 PM CDT	Severe Thunderstorm Warning	LZK	44 min
Sep 1, 6:55 PM CDT	Severe Thunderstorm Warning	LZK	50 min
Sep 1, 6:58 PM CDT	Flash Flood Warning	LZK	3 hr
Sep 1, 7:09 PM CDT	Severe Thunderstorm Warning	LZK	51 min
Sep 1, 7:13 PM CDT	Severe Thunderstorm Warning	LZK	47 min
Sep 1, 8:11 PM CDT	Special Weather Statement	LZK	44 min
Sep 1, 8:46 PM CDT	Severe Thunderstorm Warning	LZK	44 min
Sep 1, 10:01 PM CDT	Severe Thunderstorm Warning	LZK	44 min
Sep 1, 10:45 PM CDT	Severe Thunderstorm Warning	LZK	30 min
Sep 2, 8:18 PM CDT	Heat Advisory	LZK	71 hr
Sep 6, 3:45 AM CDT	Heat Advisory	LZK	39 hr
Sep 7, 5:15 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Sep 7, 8:39 PM CDT	Severe Thunderstorm Warning	LZK	66 min
Sep 7, 9:39 PM CDT	Severe Thunderstorm Warning	LZK	66 min
Oct 5, 4:29 PM CDT	Mesoscale Discussion	SPC	2 hr
Oct 12, 10:10 PM CDT	Dense Fog Advisory	LZK	12 hr
Oct 14, 1:42 AM CDT	Mesoscale Discussion	SPC	93 min
Oct 14, 3:19 AM CDT	Mesoscale Discussion	SPC	26 min
Oct 14, 3:40 AM CDT	Lake Wind Advisory	LZK	15 hr
Oct 16, 2:31 PM CDT	Lake Wind Advisory	LZK	34 hr
Oct 17, 3:44 PM CDT	Mesoscale Discussion	SPC	61 min
Oct 17, 5:21 PM CDT	Tornado Watch	SPC	7 hr
Oct 17, 7:19 PM CDT	Tornado Warning	LZK	26 min
Oct 17, 7:34 PM CDT	Severe Thunderstorm Warning	LZK	17 min
Oct 17, 7:35 PM CDT	Mesoscale Discussion	SPC	85 min
Oct 18, 3:12 AM CDT	Lake Wind Advisory	LZK	16 hr
Oct 18, 1:33 PM CDT	Red Flag Warning	LZK	5 hr
Oct 19, 3:33 AM CDT	Lake Wind Advisory	LZK	14 hr
Nov 3, 7:02 PM CDT	Special Weather Statement	LZK	33 min
Nov 10, 2:50 PM CST	Lake Wind Advisory	LZK	30 hr
Nov 11, 2:47 PM CST	Mesoscale Discussion	SPC	88 min
Nov 12, 2:53 AM CST	Freeze Warning	LZK	29 hr
Dec 4, 1:03 PM CST	Areal Flood Advisory	LZK	117 min
Dec 4, 2:04 PM CST	Areal Flood Advisory	LZK	116 min
Dec 9, 12:38 PM CST	Mesoscale Discussion	SPC	2 hr
Dec 9, 2:10 PM CST	Tornado Watch	SPC	9 hr
Dec 9, 5:54 PM CST	Mesoscale Discussion	SPC	96 min
Dec 19, 5:15 AM CST	Lake Wind Advisory	LZK	23 hr
Dec 19, 3:20 PM CST	Wind Advisory	LZK	27 hr
Dec 20, 12:50 AM CST	Mesoscale Discussion	SPC	55 min
Dec 20, 1:07 AM CST	Severe Thunderstorm Watch	SPC	5 hr
Dec 20, 1:37 AM CST	Severe Thunderstorm Warning	LZK	38 min
Dec 20, 2:11 AM CST	Severe Thunderstorm Warning	LZK	49 min
Dec 24, 5:00 AM CST	Winter Storm Warning	LZK	47 hr
Dec 25, 5:00 AM CST	Wind Advisory	LZK	23 hr
Dec 27, 1:01 PM CST	Winter Weather Advisory	LZK	22 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	46
Tornado Warning	10
Severe Thunderstorm Watch	7
Tornado Watch	6
Mesoscale Discussion	32
Special Weather Statement	16
Flooding
Flash Flood Warning	7
Flash Flood Watch	2
Areal Flood Advisory	3
River Flood Advisory	2
Winter
Winter Storm Warning	1
Winter Weather Advisory	1
Heat
Excessive Heat Watch	1
Heat Advisory	7
Cold
Freeze Warning	1
Wind and dust
Lake Wind Advisory	29
Wind Advisory	3
Fire
Red Flag Warning	5
Fire Weather Watch	2
Fog and smoke
Dense Fog 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 2011 2013

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.