Alert archive / Mississippi / Yazoo County

Weather alerts in Yazoo County, Mississippi, 2011

207 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Yazoo County and its neighbors

Each county as a circle sized by its count in 2011. Tap one for its archive.

Alerts: 207
Warnings: 75
Watches: 35
Advisories: 29
Busiest month: April58 alerts
Busiest day: April 15, 201115 alerts

Over time

By month

Warning verification

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

2 of 6 tornado warnings covering Yazoo County in 2011 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 19 minutes after it went out.

Yazoo County, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	6	2	67%	1	100%	19 min
Severe thunderstorm warnings	45	24	47%	21	90%	22 min
Flash flood warnings	10	10	0%	3	67%	68 min

Each office's whole area, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Jackson, MS: tornado warnings	225	65	71%	184	85%	26 min
NWS Jackson, MS: severe thunderstorm warnings	717	416	42%	1,089	75%	24 min
NWS Jackson, MS: flash flood warnings	164	99	40%	205	93%	110 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
Dec 31, 9:02 PM CST	Flash Flood Warning	JAN	3 hr
Dec 31, 9:26 PM CST	Flash Flood Watch	JAN	7 hr
Dec 31, 9:50 PM CST	Severe Thunderstorm Warning	JAN	40 min
Dec 31, 10:18 PM CST	Severe Thunderstorm Warning	JAN	42 min
Dec 31, 10:46 PM CST	Tornado Watch	SPC	5 hr
Dec 31, 10:59 PM CST	Severe Thunderstorm Warning	JAN	61 min
Dec 31, 11:07 PM CST	Tornado Warning	JAN	53 min
Dec 31, 11:29 PM CST	Flash Flood Warning	JAN	4 hr
Dec 31, 11:56 PM CST	Severe Thunderstorm Warning	JAN	64 min
Jan 5, 10:53 PM CST	Dense Fog Advisory	JAN	11 hr
Jan 7, 3:30 PM CST	Winter Storm Watch	JAN	45 hr
Jan 8, 3:01 PM CST	Winter Storm Warning	JAN	37 hr
Jan 9, 7:09 AM CST	Mesoscale Discussion	SPC	5 hr
Jan 9, 12:45 PM CST	Winter Weather Advisory	JAN	23 hr
Jan 9, 3:06 PM CST	Mesoscale Discussion	SPC	4 hr
Jan 11, 4:36 AM CST	Hard Freeze Warning	JAN	3 days
Jan 11, 4:47 AM CST	Wind Chill Advisory	JAN	28 hr
Jan 31, 2:38 PM CST	Wind Advisory	JAN	29 hr
Feb 1, 6:46 AM CST	Mesoscale Discussion	SPC	119 min
Feb 2, 3:54 PM CST	Winter Storm Watch	JAN	25 hr
Feb 2, 5:40 PM CST	Hard Freeze Warning	JAN	18 hr
Feb 3, 4:39 AM CST	Winter Storm Warning	JAN	31 hr
Feb 3, 12:58 PM CST	Mesoscale Discussion	SPC	5 hr
Feb 3, 10:36 PM CST	Mesoscale Discussion	SPC	6 hr
Feb 4, 5:28 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 7, 3:21 PM CST	Winter Storm Watch	JAN	38 hr
Feb 8, 3:35 PM CST	Winter Storm Warning	JAN	32 hr
Feb 9, 5:28 AM CST	Winter Weather Advisory	JAN	22 hr
Feb 9, 2:17 PM CST	Hard Freeze Warning	JAN	45 hr
Feb 9, 3:03 PM CST	Mesoscale Discussion	SPC	4 hr
Feb 20, 3:03 PM CST	Wind Advisory	JAN	21 hr
Feb 23, 3:09 PM CST	Wind Advisory	JAN	33 hr
Feb 24, 2:34 PM CST	Tornado Watch	SPC	7 hr
Feb 24, 5:26 PM CST	Mesoscale Discussion	SPC	94 min
Feb 24, 8:06 PM CST	Tornado Warning	JAN	39 min
Feb 24, 8:09 PM CST	Severe Thunderstorm Warning	JAN	66 min
Feb 24, 8:11 PM CST	Mesoscale Discussion	SPC	64 min
Feb 24, 8:42 PM CST	Severe Thunderstorm Warning	JAN	63 min
Feb 24, 10:38 PM CST	Mesoscale Discussion	SPC	97 min
Feb 27, 4:06 AM CST	Wind Advisory	JAN	26 hr
Feb 28, 5:28 AM CST	Mesoscale Discussion	SPC	62 min
Mar 7, 6:02 PM CST	Flash Flood Watch	JAN	41 hr
Mar 8, 9:52 AM CST	Mesoscale Discussion	SPC	53 min
Mar 8, 12:54 PM CST	Mesoscale Discussion	SPC	36 min
Mar 8, 7:37 PM CST	Tornado Watch	SPC	7 hr
Mar 8, 11:38 PM CST	Severe Thunderstorm Warning	JAN	52 min
Mar 9, 1:04 AM CST	Flash Flood Warning	JAN	3 hr
Mar 9, 1:28 AM CST	Mesoscale Discussion	SPC	92 min
Mar 9, 3:59 AM CST	Areal Flood Warning	JAN	4 hr
Mar 9, 6:28 AM CST	Mesoscale Discussion	SPC	92 min
Mar 9, 6:44 AM CST	River Flood Warning	JAN	10 days
Mar 14, 12:49 PM CDT	Mesoscale Discussion	SPC	56 min
Mar 26, 2:27 PM CDT	Mesoscale Discussion	SPC	63 min
Mar 26, 3:27 PM CDT	Tornado Watch	SPC	7 hr
Mar 26, 8:32 PM CDT	Mesoscale Discussion	SPC	58 min
Mar 26, 9:33 PM CDT	Mesoscale Discussion	SPC	27 min
Mar 27, 5:42 AM CDT	Severe Thunderstorm Warning	JAN	48 min
Mar 29, 4:19 AM CDT	Flash Flood Watch	JAN	26 hr
Mar 29, 5:26 PM CDT	Mesoscale Discussion	SPC	2 hr
Mar 29, 6:26 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Mar 29, 7:40 PM CDT	Mesoscale Discussion	SPC	95 min
Mar 29, 11:39 PM CDT	Mesoscale Discussion	SPC	2 hr
Mar 30, 1:31 AM CDT	Severe Thunderstorm Warning	JAN	22 min
Apr 2, 2:39 PM CDT	Wind Advisory	JAN	29 hr
Apr 4, 12:05 AM CDT	Wind Advisory	JAN	22 hr
Apr 4, 10:25 AM CDT	Mesoscale Discussion	SPC	2 hr
Apr 4, 10:53 AM CDT	Tornado Watch	SPC	7 hr
Apr 4, 2:52 PM CDT	Mesoscale Discussion	SPC	113 min
Apr 4, 3:25 PM CDT	Severe Thunderstorm Warning	JAN	35 min
Apr 4, 4:14 PM CDT	Severe Thunderstorm Warning	JAN	46 min
Apr 11, 4:43 AM CDT	Wind Advisory	JAN	11 hr
Apr 11, 9:46 AM CDT	Mesoscale Discussion	SPC	29 min
Apr 11, 2:41 PM CDT	Special Weather Statement	JAN	59 min
Apr 15, 2:19 AM CDT	Tornado Watch	SPC	8 hr
Apr 15, 4:21 AM CDT	Mesoscale Discussion	SPC	84 min
Apr 15, 6:41 AM CDT	Severe Thunderstorm Warning	JAN	49 min
Apr 15, 6:56 AM CDT	Tornado Warning	JAN	64 min
Apr 15, 7:32 AM CDT	Tornado Watch	SPC	7 hr
Apr 15, 7:42 AM CDT	Severe Thunderstorm Warning	JAN	63 min
Apr 15, 8:00 AM CDT	Flash Flood Warning	JAN	5 hr
Apr 15, 8:09 AM CDT	Tornado Warning	JAN	66 min
Apr 15, 8:18 AM CDT	Severe Thunderstorm Warning	JAN	27 min
Apr 15, 9:24 AM CDT	Severe Thunderstorm Warning	JAN	66 min
Apr 15, 10:03 AM CDT	Tornado Warning	JAN	57 min
Apr 15, 10:28 AM CDT	Mesoscale Discussion	SPC	2 hr
Apr 15, 1:30 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 15, 2:41 PM CDT	Tornado Watch	SPC	7 hr
Apr 15, 3:35 PM CDT	Mesoscale Discussion	SPC	85 min
Apr 18, 3:48 PM CDT	Wind Advisory	JAN	27 hr
Apr 20, 9:22 AM CDT	Flash Flood Watch	JAN	31 hr
Apr 20, 1:02 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 20, 7:45 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 20, 7:52 PM CDT	Severe Thunderstorm Warning	JAN	53 min
Apr 20, 10:22 PM CDT	Mesoscale Discussion	SPC	83 min
Apr 20, 11:52 PM CDT	Severe Thunderstorm Warning	JAN	37 min
Apr 21, 6:50 AM CDT	Severe Thunderstorm Warning	JAN	40 min
Apr 21, 7:44 AM CDT	Special Weather Statement	JAN	31 min
Apr 21, 7:48 AM CDT	Severe Thunderstorm Warning	JAN	42 min
Apr 21, 7:59 AM CDT	Severe Thunderstorm Warning	JAN	49 min
Apr 21, 8:47 AM CDT	Special Weather Statement	JAN	18 min
Apr 21, 9:11 AM CDT	Severe Thunderstorm Warning	JAN	22 min
Apr 21, 9:50 AM CDT	Flash Flood Warning	JAN	115 min
Apr 21, 10:00 AM CDT	Mesoscale Discussion	SPC	90 min
Apr 21, 10:31 AM CDT	Special Weather Statement	JAN	29 min
Apr 25, 9:23 PM CDT	Tornado Watch	SPC	7 hr
Apr 26, 7:36 AM CDT	Flash Flood Watch	JAN	32 hr
Apr 26, 1:48 PM CDT	Wind Advisory	JAN	29 hr
Apr 26, 7:59 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 26, 8:55 PM CDT	River Flood Warning	JAN	47 days
Apr 26, 9:33 PM CDT	Tornado Watch PDS	SPC	7 hr
Apr 26, 11:33 PM CDT	Mesoscale Discussion	SPC	117 min
Apr 27, 12:53 AM CDT	Tornado Warning	JAN	52 min
Apr 27, 1:00 AM CDT	Severe Thunderstorm Warning	JAN	60 min
Apr 27, 1:55 AM CDT	Severe Thunderstorm Warning	JAN	65 min
Apr 27, 2:26 AM CDT	Tornado Watch	SPC	6 hr
Apr 27, 2:36 AM CDT	Severe Thunderstorm Warning	JAN	54 min
Apr 27, 5:24 AM CDT	Special Weather Statement	JAN	31 min
Apr 27, 5:45 AM CDT	Severe Thunderstorm Warning	JAN	32 min
Apr 27, 10:45 AM CDT	Mesoscale Discussion	SPC	90 min
Apr 27, 11:02 AM CDT	Tornado Watch PDS	SPC	8 hr
Apr 27, 2:09 PM CDT	Severe Thunderstorm Warning	JAN	51 min
May 2, 1:51 PM CDT	Mesoscale Discussion	SPC	2 hr
May 12, 4:00 PM CDT	Flash Flood Watch	JAN	23 hr
May 20, 2:53 PM CDT	Flash Flood Watch	JAN	19 hr
May 25, 3:58 AM CDT	Wind Advisory	JAN	15 hr
May 25, 9:43 PM CDT	Tornado Watch	SPC	5 hr
Jun 2, 2:48 PM CDT	Heat Advisory	JAN	3 days
Jun 2, 5:06 PM CDT	Mesoscale Discussion	SPC	54 min
Jun 3, 5:32 PM CDT	Mesoscale Discussion	SPC	118 min
Jun 5, 6:13 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 7, 2:01 PM CDT	Mesoscale Discussion	SPC	59 min
Jun 7, 6:04 PM CDT	Mesoscale Discussion	SPC	116 min
Jun 7, 6:15 PM CDT	Severe Thunderstorm Warning	JAN	45 min
Jun 9, 3:31 PM CDT	Special Weather Statement	JAN	29 min
Jun 13, 1:32 PM CDT	Mesoscale Discussion	SPC	58 min
Jun 13, 2:45 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 13, 5:02 PM CDT	Special Weather Statement	JAN	58 min
Jun 13, 5:29 PM CDT	Severe Thunderstorm Warning	JAN	61 min
Jun 13, 5:59 PM CDT	Mesoscale Discussion	SPC	61 min
Jun 16, 3:13 PM CDT	Mesoscale Discussion	SPC	62 min
Jun 16, 3:39 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 17, 2:39 PM CDT	Heat Advisory	JAN	3 days
Jun 21, 11:58 AM CDT	Mesoscale Discussion	SPC	62 min
Jun 21, 1:08 PM CDT	Severe Thunderstorm Warning	JAN	38 min
Jun 28, 9:52 AM CDT	Mesoscale Discussion	SPC	113 min
Jun 28, 10:26 AM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 3, 8:36 PM CDT	Severe Thunderstorm Warning	JAN	39 min
Jul 3, 9:04 PM CDT	Severe Thunderstorm Warning	JAN	41 min
Jul 4, 5:46 PM CDT	Severe Thunderstorm Warning	JAN	44 min
Jul 4, 7:18 PM CDT	Special Weather Statement	JAN	27 min
Jul 4, 7:27 PM CDT	Severe Thunderstorm Warning	JAN	48 min
Jul 4, 7:56 PM CDT	Severe Thunderstorm Warning	JAN	49 min
Jul 9, 4:39 AM CDT	Heat Advisory	JAN	6 days
Jul 12, 4:26 PM CDT	Severe Thunderstorm Warning	JAN	49 min
Jul 12, 5:26 PM CDT	Severe Thunderstorm Warning	JAN	49 min
Jul 12, 5:50 PM CDT	Severe Thunderstorm Warning	JAN	35 min
Jul 13, 5:32 PM CDT	Special Weather Statement	JAN	38 min
Jul 13, 7:20 PM CDT	Severe Thunderstorm Warning	JAN	55 min
Jul 15, 6:33 PM CDT	Special Weather Statement	JAN	27 min
Jul 20, 7:54 PM CDT	Special Weather Statement	JAN	31 min
Jul 31, 4:00 AM CDT	Heat Advisory	JAN	72 hr
Aug 1, 3:53 AM CDT	Excessive Heat Warning	JAN	5 days
Aug 3, 2:49 PM CDT	Heat Advisory	JAN	8 days
Aug 7, 4:05 AM CDT	Excessive Heat Warning	JAN	15 hr
Aug 7, 4:05 AM CDT	Heat Advisory	JAN	4 days
Aug 9, 1:20 PM CDT	Mesoscale Discussion	SPC	115 min
Aug 10, 5:34 PM CDT	Mesoscale Discussion	SPC	86 min
Aug 18, 12:55 PM CDT	Severe Thunderstorm Warning	JAN	48 min
Aug 18, 1:04 PM CDT	Mesoscale Discussion	SPC	116 min
Aug 18, 4:24 PM CDT	Heat Advisory	JAN	3 days
Aug 20, 4:47 PM CDT	Severe Thunderstorm Warning	JAN	43 min
Aug 22, 3:13 AM CDT	Heat Advisory	JAN	4 days
Sep 2, 3:11 PM CDT	Flash Flood Watch	JAN	3 days
Sep 3, 3:57 PM CDT	Wind Advisory	JAN	52 hr
Sep 4, 9:20 PM CDT	Flash Flood Warning	JAN	3 hr
Sep 5, 12:14 AM CDT	Flash Flood Warning Emergency	JAN	6 hr
Sep 5, 2:24 AM CDT	Flash Flood Warning	JAN	6 hr
Sep 5, 6:10 AM CDT	Flash Flood Warning	JAN	110 min
Sep 5, 7:51 AM CDT	Flash Flood Warning	JAN	114 min
Sep 11, 5:00 PM CDT	Mesoscale Discussion	SPC	90 min
Sep 11, 5:40 PM CDT	Severe Thunderstorm Warning	JAN	50 min
Sep 11, 6:32 PM CDT	Severe Thunderstorm Warning	JAN	43 min
Sep 11, 7:13 PM CDT	Severe Thunderstorm Warning	JAN	62 min
Sep 25, 3:19 PM CDT	Tornado Watch	SPC	9 hr
Sep 25, 9:01 PM CDT	Mesoscale Discussion	SPC	89 min
Sep 25, 11:14 PM CDT	Severe Thunderstorm Warning	JAN	35 min
Sep 27, 1:36 AM CDT	Mesoscale Discussion	SPC	114 min
Sep 27, 9:42 PM CDT	Special Weather Statement	JAN	28 min
Sep 27, 10:29 PM CDT	Special Weather Statement	JAN	41 min
Sep 28, 12:03 AM CDT	Dense Fog Advisory	JAN	9 hr
Sep 29, 3:59 AM CDT	Dense Fog Advisory	JAN	5 hr
Oct 12, 1:56 PM CDT	Mesoscale Discussion	SPC	64 min
Oct 12, 4:07 PM CDT	Special Weather Statement	JAN	73 min
Oct 20, 4:54 PM CDT	Freeze Warning	JAN	15 hr
Oct 28, 2:46 PM CDT	Freeze Watch	JAN	27 hr
Oct 29, 3:43 AM CDT	Freeze Warning	JAN	28 hr
Nov 3, 8:43 AM CDT	Wind Advisory	JAN	7 hr
Nov 10, 4:08 AM CST	Freeze Warning	JAN	28 hr
Nov 20, 10:08 PM CST	Dense Fog Advisory	JAN	11 hr
Nov 26, 6:15 PM CST	Special Weather Statement	JAN	30 min
Nov 26, 6:22 PM CST	Severe Thunderstorm Warning	JAN	53 min
Dec 12, 2:36 PM CST	Dense Fog Advisory	JAN	12 hr
Dec 13, 7:57 PM CST	Dense Fog Advisory	JAN	13 hr
Dec 22, 2:08 AM CST	Special Weather Statement	JAN	32 min
Dec 22, 4:36 AM CST	Tornado Watch	SPC	7 hr
Dec 22, 5:09 AM CST	Flash Flood Watch	JAN	7 hr
Dec 25, 2:43 PM CST	Flood Watch	JAN	31 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	45
Tornado Warning	6
Severe Thunderstorm Watch	6
Tornado Watch	15
Mesoscale Discussion	52
Special Weather Statement	16
Flooding
Areal Flood Warning	1
Flash Flood Warning	10
River Flood Warning	2
Flash Flood Watch	9
Flood Watch	1
Winter
Winter Storm Warning	3
Winter Storm Watch	3
Winter Weather Advisory	2
Heat
Excessive Heat Warning	2
Heat Advisory	8
Cold
Freeze Warning	3
Hard Freeze Warning	3
Freeze Watch	1
Wind Chill Advisory	1
Wind and dust
Wind Advisory	12
Fog and smoke
Dense Fog Advisory	6

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2010 2012

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.