Weather alerts in Union County, Arkansas, 2010

121 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Union County and its neighbors

Each county as a circle sized by its count in 2010. Tap one for its archive.

Alerts: 121
Warnings: 32
Watches: 16
Advisories: 40
Busiest month: May24 alerts
Busiest day: April 24, 20108 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 5 tornado warnings covering Union County in 2010 had a tornado report inside them.

Union County, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	5	1	80%	0
Severe thunderstorm warnings	17	6	65%	7	71%	18 min
Flash flood warnings	1	1	0%	1	0%

Each office's whole area, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Shreveport, LA: tornado warnings	77	20	74%	46	85%	19 min
NWS Shreveport, LA: severe thunderstorm warnings	288	152	47%	358	77%	21 min
NWS Shreveport, LA: flash flood warnings	14	11	21%	39	79%	166 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 6, 3:57 AM CST	Winter Weather Advisory	SHV	29 hr
Jan 6, 6:54 AM CST	Lake Wind Advisory	SHV	33 hr
Jan 7, 5:59 AM CST	Hard Freeze Warning	SHV	29 hr
Jan 7, 4:19 PM CST	Wind Chill Advisory	SHV	19 hr
Jan 8, 5:01 AM CST	Hard Freeze Warning	SHV	30 hr
Jan 9, 4:24 AM CST	Hard Freeze Warning	SHV	31 hr
Jan 20, 3:13 PM CST	Tornado Watch	SPC	7 hr
Jan 20, 6:42 PM CST	Mesoscale Discussion	SPC	93 min
Jan 20, 8:59 PM CST	Mesoscale Discussion	SPC	91 min
Jan 20, 9:19 PM CST	Flash Flood Warning	SHV	6 hr
Jan 20, 9:36 PM CST	Tornado Watch	SPC	7 hr
Jan 21, 1:13 AM CST	Mesoscale Discussion	SPC	62 min
Jan 23, 3:58 AM CST	Lake Wind Advisory	SHV	12 hr
Jan 23, 4:03 PM CST	Mesoscale Discussion	SPC	57 min
Jan 25, 11:08 AM CST	Lake Wind Advisory	SHV	7 hr
Jan 29, 7:06 AM CST	Winter Weather Advisory	SHV	22 hr
Feb 10, 3:38 PM CST	Winter Storm Watch	SHV	14 hr
Feb 11, 5:32 AM CST	Winter Weather Advisory	SHV	3 hr
Feb 11, 8:46 AM CST	Winter Storm Warning	SHV	26 hr
Feb 11, 8:46 AM CST	Winter Weather Advisory	SHV	26 hr
Feb 15, 3:29 AM CST	Lake Wind Advisory	SHV	14 hr
Mar 10, 3:13 PM CST	Mesoscale Discussion	SPC	92 min
Mar 10, 3:26 PM CST	Tornado Watch	SPC	7 hr
Mar 10, 7:40 PM CST	Severe Thunderstorm Warning	SHV	35 min
Mar 10, 7:46 PM CST	Severe Thunderstorm Warning	SHV	44 min
Mar 10, 7:50 PM CST	Tornado Warning	SHV	40 min
Mar 10, 8:58 PM CST	Mesoscale Discussion	SPC	62 min
Mar 10, 9:08 PM CST	Severe Thunderstorm Warning	SHV	37 min
Mar 10, 9:43 PM CST	Severe Thunderstorm Warning	SHV	62 min
Mar 20, 3:13 AM CDT	Winter Weather Advisory	SHV	37 hr
Mar 20, 3:19 AM CDT	Lake Wind Advisory	SHV	40 hr
Mar 24, 9:27 PM CDT	Lake Wind Advisory	SHV	22 hr
Mar 25, 2:15 AM CDT	Mesoscale Discussion	SPC	60 min
Mar 26, 3:05 PM CDT	Lake Wind Advisory	SHV	33 hr
Mar 28, 4:39 AM CDT	Lake Wind Advisory	SHV	11 hr
Apr 5, 10:06 PM CDT	Lake Wind Advisory	SHV	26 hr
Apr 7, 1:29 PM CDT	Mesoscale Discussion	SPC	3 hr
Apr 7, 1:55 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Apr 7, 4:38 PM CDT	Severe Thunderstorm Warning	SHV	52 min
Apr 7, 5:26 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 7, 6:18 PM CDT	Severe Thunderstorm Warning	SHV	42 min
Apr 23, 8:28 AM CDT	Mesoscale Discussion	SPC	62 min
Apr 23, 9:53 AM CDT	Tornado Watch	SPC	7 hr
Apr 23, 12:08 PM CDT	Mesoscale Discussion	SPC	67 min
Apr 23, 12:52 PM CDT	Severe Thunderstorm Warning	SHV	53 min
Apr 24, 1:50 AM CDT	Tornado Watch	SPC	8 hr
Apr 24, 3:06 AM CDT	Lake Wind Advisory	SHV	18 hr
Apr 24, 5:01 AM CDT	Mesoscale Discussion	SPC	89 min
Apr 24, 5:25 AM CDT	Severe Thunderstorm Warning	SHV	50 min
Apr 24, 6:23 AM CDT	Tornado Warning	SHV	52 min
Apr 24, 7:07 AM CDT	Severe Thunderstorm Warning	SHV	38 min
Apr 24, 7:12 AM CDT	Tornado Warning	SHV	33 min
Apr 24, 7:25 AM CDT	Mesoscale Discussion	SPC	95 min
Apr 25, 5:01 AM CDT	Lake Wind Advisory	SHV	14 hr
Apr 28, 4:06 PM CDT	Lake Wind Advisory	SHV	27 hr
Apr 30, 5:53 PM CDT	Mesoscale Discussion	SPC	37 min
Apr 30, 9:09 PM CDT	Tornado Watch PDS	SPC	7 hr
Apr 30, 10:43 PM CDT	Mesoscale Discussion	SPC	62 min
Apr 30, 11:41 PM CDT	Mesoscale Discussion	SPC	64 min
May 1, 2:25 AM CDT	Mesoscale Discussion	SPC	95 min
May 1, 1:37 PM CDT	Mesoscale Discussion	SPC	53 min
May 1, 3:18 PM CDT	Tornado Watch PDS	SPC	7 hr
May 1, 5:43 PM CDT	Mesoscale Discussion	SPC	62 min
May 1, 6:15 PM CDT	Tornado Warning	SHV	31 min
May 1, 7:00 PM CDT	Tornado Warning	SHV	35 min
May 1, 7:11 PM CDT	Mesoscale Discussion	SPC	64 min
May 1, 8:31 PM CDT	Mesoscale Discussion	SPC	44 min
May 1, 9:53 PM CDT	Tornado Watch	SPC	6 hr
May 2, 6:55 AM CDT	Mesoscale Discussion	SPC	2 hr
May 7, 8:46 PM CDT	Mesoscale Discussion	SPC	2 hr
May 12, 3:41 AM CDT	Lake Wind Advisory	SHV	15 hr
May 14, 4:42 PM CDT	Mesoscale Discussion	SPC	63 min
May 14, 4:59 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 14, 10:42 PM CDT	Mesoscale Discussion	SPC	93 min
May 16, 4:54 PM CDT	Severe Thunderstorm Warning	SHV	51 min
May 16, 5:05 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
May 16, 7:43 PM CDT	Mesoscale Discussion	SPC	62 min
May 16, 7:58 PM CDT	Severe Thunderstorm Warning	SHV	32 min
May 16, 8:22 PM CDT	Severe Thunderstorm Warning	SHV	53 min
May 20, 2:05 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 9, 1:07 PM CDT	Tornado Watch	SPC	6 hr
Jun 9, 2:29 PM CDT	Mesoscale Discussion	SPC	91 min
Jun 9, 3:59 PM CDT	Severe Thunderstorm Warning	SHV	61 min
Jun 13, 4:48 AM CDT	Heat Advisory	SHV	38 hr
Jun 20, 5:30 AM CDT	Heat Advisory	SHV	62 hr
Jul 14, 3:42 AM CDT	Heat Advisory	SHV	63 hr
Jul 17, 11:42 AM CDT	Severe Thunderstorm Warning	SHV	48 min
Jul 17, 2:19 PM CDT	Areal Flood Advisory	SHV	56 min
Jul 21, 4:03 PM CDT	Heat Advisory	SHV	27 hr
Jul 30, 3:40 PM CDT	Heat Advisory	SHV	4 days
Aug 1, 4:52 AM CDT	Excessive Heat Warning	SHV	5 days
Aug 4, 3:56 PM CDT	Heat Advisory	SHV	51 hr
Aug 6, 7:10 AM CDT	Areal Flood Advisory	SHV	50 min
Aug 7, 3:38 PM CDT	Heat Advisory	SHV	9 days
Aug 12, 11:15 AM CDT	Excessive Heat Warning	SHV	8 hr
Aug 12, 11:15 AM CDT	Heat Advisory	SHV	71 hr
Aug 14, 4:10 PM CDT	Excessive Heat Warning	SHV	28 hr
Aug 18, 3:38 PM CDT	Heat Advisory	SHV	5 days
Aug 19, 6:22 PM CDT	Severe Thunderstorm Warning	SHV	23 min
Aug 22, 5:27 PM CDT	Severe Thunderstorm Warning	SHV	48 min
Oct 12, 11:34 AM CDT	Mesoscale Discussion	SPC	56 min
Oct 24, 12:51 PM CDT	Mesoscale Discussion	SPC	84 min
Oct 24, 1:51 PM CDT	Tornado Watch	SPC	8 hr
Oct 24, 3:36 PM CDT	Mesoscale Discussion	SPC	84 min
Oct 24, 6:12 PM CDT	Mesoscale Discussion	SPC	63 min
Oct 25, 4:49 AM CDT	Lake Wind Advisory	SHV	23 hr
Oct 26, 5:17 AM CDT	Lake Wind Advisory	SHV	6 hr
Nov 1, 7:17 AM CDT	Dense Fog Advisory	SHV	3 hr
Nov 1, 10:19 PM CDT	Mesoscale Discussion	SPC	86 min
Nov 1, 10:30 PM CDT	Severe Thunderstorm Warning	SHV	45 min
Nov 2, 2:40 AM CDT	Mesoscale Discussion	SPC	2 hr
Nov 3, 2:54 PM CDT	Lake Wind Advisory	SHV	28 hr
Nov 5, 3:34 AM CDT	Freeze Warning	SHV	29 hr
Nov 20, 4:27 AM CST	Dense Fog Advisory	SHV	5 hr
Nov 20, 8:16 PM CST	Dense Fog Advisory	SHV	13 hr
Nov 25, 3:00 AM CST	Lake Wind Advisory	SHV	15 hr
Nov 29, 1:31 PM CST	Tornado Watch	SPC	7 hr
Nov 30, 4:24 AM CST	Lake Wind Advisory	SHV	12 hr
Dec 7, 3:19 PM CST	Winter Weather Advisory	SHV	12 hr
Dec 11, 9:29 PM CST	Lake Wind Advisory	SHV	19 hr
Dec 13, 9:42 PM CST	Hard Freeze Warning	SHV	11 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	17
Tornado Warning	5
Severe Thunderstorm Watch	4
Tornado Watch	11
Mesoscale Discussion	33
Flooding
Flash Flood Warning	1
Areal Flood Advisory	2
Winter
Winter Storm Warning	1
Winter Storm Watch	1
Winter Weather Advisory	6
Heat
Excessive Heat Warning	3
Heat Advisory	9
Cold
Freeze Warning	1
Hard Freeze Warning	4
Wind Chill Advisory	1
Wind and dust
Lake Wind Advisory	19
Fog and smoke
Dense Fog Advisory	3

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2009 2011

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.