Alert archive / Mississippi / Clay County

Weather alerts in Clay County, Mississippi, 2009

187 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Clay County and its neighbors

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts: 187
Warnings: 68
Watches: 47
Advisories: 40
Busiest month: May31 alerts
Busiest day: May 6, 200914 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 3 tornado warnings covering Clay County in 2009 had a tornado report inside them.

Clay County, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	1	67%	0
Severe thunderstorm warnings	35	18	49%	12	100%	29 min
Flash flood warnings	11	6	45%	4	75%	211 min

Each office's whole area, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Jackson, MS: tornado warnings	126	21	83%	41	73%	18 min
NWS Jackson, MS: severe thunderstorm warnings	600	264	56%	647	83%	26 min
NWS Jackson, MS: flash flood warnings	191	100	48%	198	93%	107 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, 7:48 PM CST	Dense Fog Advisory	JAN	10 hr
Jan 5, 4:14 AM CST	Flash Flood Watch	JAN	38 hr
Jan 5, 6:23 PM CST	Areal Flood Warning	JAN	4 hr
Jan 5, 10:53 PM CST	Areal Flood Warning	JAN	3 hr
Jan 6, 6:45 AM CST	River Flood Warning	JAN	4 days
Jan 6, 12:05 PM CST	Flash Flood Warning	JAN	4 hr
Jan 6, 4:08 PM CST	Areal Flood Warning	JAN	12 hr
Jan 14, 2:36 PM CST	Hard Freeze Watch	JAN	19 hr
Jan 15, 4:35 AM CST	Hard Freeze Warning	JAN	47 hr
Jan 15, 9:56 AM CST	Lake Wind Advisory	JAN	8 hr
Jan 19, 3:27 AM CST	Lake Wind Advisory	JAN	15 hr
Jan 23, 11:47 AM CST	Lake Wind Advisory	JAN	4 hr
Feb 1, 2:38 PM CST	Lake Wind Advisory	JAN	25 hr
Feb 8, 3:34 PM CST	Lake Wind Advisory	JAN	32 hr
Feb 10, 5:26 AM CST	Lake Wind Advisory	JAN	38 hr
Feb 10, 5:26 AM CST	Wind Advisory	JAN	33 hr
Feb 18, 11:14 AM CST	Mesoscale Discussion	SPC	91 min
Feb 18, 12:42 PM CST	Tornado Watch	SPC	7 hr
Feb 18, 3:22 PM CST	Mesoscale Discussion	SPC	83 min
Feb 19, 6:30 AM CST	Lake Wind Advisory	JAN	9 hr
Feb 25, 7:40 PM CST	Lake Wind Advisory	JAN	26 hr
Feb 27, 3:37 AM CST	Flash Flood Watch	JAN	23 hr
Feb 27, 7:44 AM CST	Severe Thunderstorm Warning	JAN	46 min
Feb 27, 8:29 AM CST	Mesoscale Discussion	SPC	31 min
Feb 27, 8:40 AM CST	Severe Thunderstorm Watch	SPC	6 hr
Feb 27, 10:15 AM CST	Mesoscale Discussion	SPC	90 min
Feb 27, 10:40 AM CST	Flash Flood Warning	JAN	3 hr
Feb 27, 12:38 PM CST	Tornado Watch	SPC	7 hr
Feb 27, 1:21 PM CST	Flash Flood Warning	JAN	3 hr
Feb 27, 2:29 PM CST	Severe Thunderstorm Warning	JAN	46 min
Feb 27, 4:03 PM CST	Flash Flood Warning	JAN	12 hr
Feb 27, 4:21 PM CST	Severe Thunderstorm Warning	JAN	39 min
Feb 27, 6:38 PM CST	Mesoscale Discussion	SPC	97 min
Feb 27, 7:45 PM CST	Tornado Watch	SPC	7 hr
Feb 27, 8:24 PM CST	Severe Thunderstorm Warning	JAN	51 min
Feb 27, 8:45 PM CST	River Flood Warning	JAN	4 days
Feb 27, 9:09 PM CST	Severe Thunderstorm Warning	JAN	48 min
Feb 27, 10:47 PM CST	Mesoscale Discussion	SPC	118 min
Feb 28, 5:27 AM CST	Winter Weather Advisory	JAN	27 hr
Feb 28, 3:46 PM CST	Winter Storm Warning	JAN	16 hr
Feb 28, 3:52 PM CST	Lake Wind Advisory	JAN	26 hr
Mar 1, 8:04 AM CST	Winter Weather Advisory	JAN	116 min
Mar 13, 1:57 PM CDT	Flood Watch	JAN	20 hr
Mar 14, 9:46 AM CDT	River Flood Warning	JAN	3 days
Mar 16, 11:18 PM CDT	Dense Fog Advisory	JAN	12 hr
Mar 23, 3:38 PM CDT	Lake Wind Advisory	JAN	27 hr
Mar 25, 3:38 AM CDT	Flood Watch	JAN	11 hr
Mar 25, 9:11 AM CDT	River Flood Warning	JAN	4 days
Mar 25, 3:02 PM CDT	Flash Flood Watch	JAN	13 hr
Mar 26, 1:59 AM CDT	Severe Thunderstorm Warning	JAN	46 min
Mar 26, 4:07 AM CDT	Flash Flood Watch	JAN	24 hr
Mar 27, 3:53 AM CDT	Flash Flood Watch	JAN	26 hr
Apr 2, 9:24 AM CDT	Tornado Watch	SPC	7 hr
Apr 2, 11:51 AM CDT	Mesoscale Discussion	SPC	84 min
Apr 2, 1:05 PM CDT	Severe Thunderstorm Warning	JAN	40 min
Apr 2, 1:34 PM CDT	Severe Thunderstorm Warning	JAN	56 min
Apr 2, 1:50 PM CDT	Tornado Warning	JAN	9 min
Apr 2, 2:24 PM CDT	Severe Thunderstorm Warning	JAN	41 min
Apr 2, 3:56 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 2, 5:16 PM CDT	Severe Thunderstorm Warning	JAN	22 min
Apr 2, 5:36 PM CDT	Mesoscale Discussion	SPC	84 min
Apr 2, 6:46 PM CDT	Severe Thunderstorm Warning	JAN	59 min
Apr 2, 7:25 PM CDT	Severe Thunderstorm Warning	JAN	50 min
Apr 5, 12:43 PM CDT	Lake Wind Advisory	JAN	27 hr
Apr 5, 9:42 PM CDT	Freeze Watch	JAN	17 hr
Apr 6, 2:54 PM CDT	Freeze Warning	JAN	17 hr
Apr 7, 4:27 AM CDT	Freeze Watch	JAN	10 hr
Apr 7, 2:24 PM CDT	Freeze Warning	JAN	18 hr
Apr 8, 2:35 PM CDT	Lake Wind Advisory	JAN	39 hr
Apr 10, 1:24 AM CDT	Mesoscale Discussion	SPC	96 min
Apr 10, 1:43 AM CDT	Tornado Watch	SPC	5 hr
Apr 10, 2:27 AM CDT	Severe Thunderstorm Warning	JAN	48 min
Apr 10, 3:13 AM CDT	Severe Thunderstorm Warning	JAN	47 min
Apr 10, 10:01 AM CDT	Lake Wind Advisory	JAN	5 hr
Apr 12, 3:45 AM CDT	Lake Wind Advisory	JAN	19 hr
Apr 12, 7:27 PM CDT	High Wind Warning	JAN	93 min
Apr 12, 10:38 PM CDT	Wind Advisory	JAN	2 hr
Apr 19, 12:43 PM CDT	Mesoscale Discussion	SPC	3 hr
May 2, 2:38 PM CDT	Mesoscale Discussion	SPC	97 min
May 2, 2:55 PM CDT	Tornado Watch	SPC	6 hr
May 2, 5:22 PM CDT	Mesoscale Discussion	SPC	53 min
May 2, 7:30 PM CDT	Mesoscale Discussion	SPC	60 min
May 2, 8:43 PM CDT	Tornado Watch	SPC	6 hr
May 3, 4:02 AM CDT	Flash Flood Watch	JAN	11 hr
May 3, 10:18 AM CDT	River Flood Warning	JAN	48 hr
May 3, 12:29 PM CDT	Areal Flood Warning	JAN	12 hr
May 5, 4:24 AM CDT	Flash Flood Watch	JAN	36 hr
May 5, 10:07 PM CDT	Mesoscale Discussion	SPC	83 min
May 5, 10:27 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
May 6, 12:53 AM CDT	Mesoscale Discussion	SPC	37 min
May 6, 12:54 AM CDT	Severe Thunderstorm Warning	JAN	51 min
May 6, 12:54 AM CDT	Tornado Watch	SPC	5 hr
May 6, 1:26 AM CDT	Severe Thunderstorm Warning	JAN	49 min
May 6, 1:27 AM CDT	Mesoscale Discussion	SPC	3 hr
May 6, 3:05 AM CDT	Mesoscale Discussion	SPC	115 min
May 6, 5:45 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 6, 6:08 AM CDT	Severe Thunderstorm Warning	JAN	67 min
May 6, 6:22 AM CDT	Flash Flood Warning	JAN	4 hr
May 6, 7:06 AM CDT	Severe Thunderstorm Warning	JAN	54 min
May 6, 9:28 AM CDT	River Flood Warning	JAN	4 days
May 6, 10:17 AM CDT	Flash Flood Warning	JAN	4 hr
May 9, 4:16 AM CDT	Flash Flood Watch	JAN	35 hr
May 9, 5:31 PM CDT	Mesoscale Discussion	SPC	89 min
May 9, 5:53 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 10, 11:17 AM CDT	Mesoscale Discussion	SPC	118 min
May 12, 6:38 PM CDT	Mesoscale Discussion	SPC	97 min
May 12, 8:35 PM CDT	Severe Thunderstorm Warning	JAN	40 min
May 13, 1:10 AM CDT	Severe Thunderstorm Warning	JAN	28 min
May 23, 4:55 AM CDT	Flash Flood Watch	JAN	23 hr
Jun 12, 10:03 AM CDT	Mesoscale Discussion	SPC	87 min
Jun 12, 11:35 AM CDT	Severe Thunderstorm Watch PDS	SPC	9 hr
Jun 12, 2:39 PM CDT	Severe Thunderstorm Warning	JAN	39 min
Jun 12, 3:22 PM CDT	Mesoscale Discussion	SPC	83 min
Jun 12, 5:24 PM CDT	Mesoscale Discussion	SPC	96 min
Jun 12, 6:08 PM CDT	Severe Thunderstorm Warning	JAN	52 min
Jun 12, 6:44 PM CDT	Severe Thunderstorm Warning	JAN	46 min
Jun 12, 6:53 PM CDT	Flash Flood Warning	JAN	111 min
Jun 13, 9:13 AM CDT	Flash Flood Warning	JAN	2 hr
Jun 13, 5:52 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 14, 8:38 AM CDT	Mesoscale Discussion	SPC	97 min
Jun 14, 8:50 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 14, 10:45 AM CDT	Mesoscale Discussion	SPC	90 min
Jun 21, 4:04 AM CDT	Heat Advisory	JAN	4 days
Jun 23, 5:00 PM CDT	Severe Thunderstorm Warning	JAN	48 min
Jun 27, 4:48 AM CDT	Heat Advisory	JAN	38 hr
Jun 28, 2:51 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 28, 3:15 PM CDT	Severe Thunderstorm Warning	JAN	60 min
Jun 28, 3:52 PM CDT	Mesoscale Discussion	SPC	53 min
Jul 13, 12:00 PM CDT	Severe Thunderstorm Warning	JAN	24 min
Jul 28, 3:29 PM CDT	Tornado Warning	JAN	31 min
Jul 28, 6:01 PM CDT	Severe Thunderstorm Warning	JAN	22 min
Jul 29, 8:20 PM CDT	Flash Flood Watch	JAN	35 hr
Jul 30, 3:42 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
Jul 30, 5:01 PM CDT	Mesoscale Discussion	SPC	59 min
Jul 30, 5:18 PM CDT	Severe Thunderstorm Warning	JAN	42 min
Jul 30, 5:24 PM CDT	Severe Thunderstorm Warning	JAN	51 min
Jul 30, 6:00 PM CDT	Severe Thunderstorm Warning	JAN	20 min
Jul 30, 6:29 PM CDT	Mesoscale Discussion	SPC	61 min
Aug 1, 10:01 AM CDT	Flash Flood Watch	JAN	11 hr
Aug 11, 12:53 PM CDT	Severe Thunderstorm Warning	JAN	37 min
Aug 17, 3:38 AM CDT	Lake Wind Advisory	JAN	8 hr
Sep 16, 5:21 AM CDT	Flash Flood Warning	JAN	95 min
Sep 21, 4:02 AM CDT	Flash Flood Watch	JAN	15 hr
Sep 21, 10:39 AM CDT	Severe Thunderstorm Warning	JAN	31 min
Sep 22, 3:59 AM CDT	Flash Flood Watch	JAN	15 hr
Sep 23, 5:25 PM CDT	Flash Flood Warning	JAN	115 min
Sep 24, 4:03 AM CDT	Flash Flood Watch	JAN	12 hr
Sep 24, 9:23 AM CDT	River Flood Warning	JAN	24 hr
Oct 4, 3:48 AM CDT	Flash Flood Watch	JAN	17 hr
Oct 9, 11:26 AM CDT	Tornado Watch	SPC	5 hr
Oct 9, 1:41 PM CDT	Mesoscale Discussion	SPC	94 min
Oct 9, 1:50 PM CDT	Severe Thunderstorm Warning	JAN	55 min
Oct 9, 2:44 PM CDT	Severe Thunderstorm Warning	JAN	50 min
Oct 12, 7:03 AM CDT	Flash Flood Watch	JAN	9 hr
Oct 12, 10:18 AM CDT	River Flood Warning	JAN	5 days
Oct 13, 4:23 AM CDT	Flash Flood Watch	JAN	22 hr
Oct 17, 4:25 AM CDT	Lake Wind Advisory	JAN	15 hr
Oct 17, 2:52 PM CDT	Freeze Watch	JAN	24 hr
Oct 18, 2:31 PM CDT	Freeze Warning	JAN	18 hr
Oct 21, 4:07 PM CDT	Flash Flood Watch	JAN	30 hr
Oct 27, 3:35 PM CDT	Dense Fog Advisory	JAN	18 hr
Oct 30, 4:06 AM CDT	Lake Wind Advisory	JAN	12 hr
Oct 30, 10:22 AM CDT	Mesoscale Discussion	SPC	83 min
Oct 30, 12:22 PM CDT	Tornado Watch	SPC	8 hr
Oct 30, 1:53 PM CDT	Tornado Warning	JAN	67 min
Oct 30, 2:11 PM CDT	Mesoscale Discussion	SPC	94 min
Nov 9, 3:54 PM CST	Lake Wind Advisory	JAN	25 hr
Nov 10, 2:54 PM CST	Lake Wind Advisory	JAN	25 hr
Nov 16, 9:37 AM CST	Lake Wind Advisory	JAN	18 hr
Nov 25, 2:54 PM CST	Freeze Watch	JAN	14 hr
Nov 26, 4:39 AM CST	Freeze Warning	JAN	27 hr
Nov 30, 10:25 AM CST	Lake Wind Advisory	JAN	7 hr
Dec 2, 9:03 AM CST	Lake Wind Advisory	JAN	9 hr
Dec 4, 5:22 PM CST	Mesoscale Discussion	SPC	6 hr
Dec 7, 3:19 PM CST	Lake Wind Advisory	JAN	48 hr
Dec 8, 6:12 PM CST	Tornado Watch	SPC	8 hr
Dec 8, 8:17 PM CST	Flash Flood Warning	JAN	4 hr
Dec 8, 10:21 PM CST	Severe Thunderstorm Warning	JAN	36 min
Dec 10, 9:44 AM CST	Lake Wind Advisory	JAN	6 hr
Dec 13, 3:37 PM CST	Dense Fog Advisory	JAN	17 hr
Dec 14, 9:06 PM CST	Lake Wind Advisory	JAN	19 hr
Dec 19, 4:49 AM CST	Lake Wind Advisory	JAN	13 hr
Dec 22, 3:28 PM CST	Lake Wind Advisory	JAN	43 hr
Dec 23, 4:31 AM CST	Flash Flood Watch	JAN	37 hr
Dec 23, 3:03 PM CST	Wind Advisory	JAN	36 hr
Dec 24, 5:00 PM CST	Lake Wind Advisory	JAN	21 hr
Dec 30, 5:30 PM CST	Dense Fog Advisory	JAN	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	35
Tornado Warning	3
Severe Thunderstorm Watch	10
Tornado Watch	11
Mesoscale Discussion	32
Flooding
Areal Flood Warning	4
Flash Flood Warning	11
River Flood Warning	8
Flash Flood Watch	19
Flood Watch	2
Winter
Winter Storm Warning	1
Winter Weather Advisory	2
Heat
Heat Advisory	2
Cold
Freeze Warning	4
Hard Freeze Warning	1
Freeze Watch	4
Hard Freeze Watch	1
Wind and dust
High Wind Warning	1
Lake Wind Advisory	28
Wind Advisory	3
Fog and smoke
Dense Fog Advisory	5

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.