Alert archive / Mississippi / Perry County

Weather alerts in Perry County, Mississippi, 2009

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

Perry County and its neighbors

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

Alerts: 183
Warnings: 55
Watches: 41
Advisories: 37
Busiest month: March39 alerts
Busiest day: April 13, 200912 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 2 tornado warnings covering Perry County in 2009 had a tornado report inside them.

Perry County, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	0	100%	0
Severe thunderstorm warnings	19	1	95%	1	100%	6 min
Flash flood warnings	15	7	53%	2	100%	98 min

Each office's whole area, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Mobile, AL: tornado warnings	53	2	96%	5	60%	23 min
NWS Mobile, AL: severe thunderstorm warnings	313	51	84%	92	73%	24 min
NWS Mobile, AL: flash flood warnings	77	28	64%	58	78%	84 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, 11:59 PM CST	Dense Fog Advisory	MOB	10 hr
Jan 3, 12:32 PM CST	Mesoscale Discussion	SPC	88 min
Jan 4, 10:24 PM CST	Dense Fog Advisory	MOB	11 hr
Jan 5, 2:37 PM CST	Flash Flood Watch	MOB	37 hr
Jan 6, 9:43 AM CST	Mesoscale Discussion	SPC	2 hr
Jan 6, 2:03 PM CST	Tornado Watch	SPC	5 hr
Jan 6, 3:57 PM CST	Mesoscale Discussion	SPC	93 min
Jan 10, 6:41 PM CST	Areal Flood Advisory	MOB	3 hr
Jan 11, 10:46 AM CST	River Flood Warning	MOB	23 hr
Jan 13, 3:25 PM CST	Hard Freeze Watch	MOB	29 hr
Jan 14, 8:44 PM CST	Hard Freeze Warning	MOB	36 hr
Jan 15, 4:41 AM CST	Hard Freeze Watch	MOB	7 hr
Jan 15, 12:10 PM CST	Hard Freeze Warning	MOB	45 hr
Jan 19, 9:15 PM CST	Hard Freeze Watch	MOB	6 hr
Jan 20, 3:18 AM CST	Hard Freeze Warning	MOB	29 hr
Jan 26, 4:20 AM CST	Dense Fog Advisory	MOB	5 hr
Jan 26, 11:02 PM CST	Dense Fog Advisory	MOB	10 hr
Feb 3, 4:11 AM CST	Hard Freeze Watch	MOB	24 hr
Feb 4, 4:08 AM CST	Hard Freeze Warning	MOB	29 hr
Feb 4, 2:07 PM CST	Hard Freeze Watch	MOB	15 hr
Feb 18, 1:22 PM CST	Mesoscale Discussion	SPC	53 min
Feb 18, 4:58 PM CST	Mesoscale Discussion	SPC	92 min
Feb 18, 7:14 PM CST	Mesoscale Discussion	SPC	61 min
Feb 18, 7:42 PM CST	Severe Thunderstorm Watch	SPC	5 hr
Feb 27, 12:38 PM CST	Tornado Watch	SPC	7 hr
Feb 28, 3:02 PM CST	Wind Advisory	MOB	27 hr
Mar 5, 10:27 PM CST	Dense Fog Advisory	MOB	11 hr
Mar 8, 5:02 AM CDT	Dense Fog Advisory	MOB	4 hr
Mar 9, 12:10 PM CDT	Dense Fog Advisory	MOB	23 hr
Mar 10, 11:47 PM CDT	Dense Fog Advisory	MOB	12 hr
Mar 16, 2:42 PM CDT	Dense Fog Advisory	MOB	15 hr
Mar 19, 4:39 AM CDT	Dense Fog Advisory	MOB	4 hr
Mar 25, 12:08 PM CDT	Mesoscale Discussion	SPC	67 min
Mar 25, 2:40 PM CDT	Flash Flood Watch	MOB	70 hr
Mar 25, 11:38 PM CDT	Mesoscale Discussion	SPC	97 min
Mar 26, 1:25 AM CDT	Mesoscale Discussion	SPC	35 min
Mar 26, 1:36 AM CDT	Tornado Watch	SPC	9 hr
Mar 26, 3:40 AM CDT	Mesoscale Discussion	SPC	95 min
Mar 26, 4:13 AM CDT	Severe Thunderstorm Warning	MOB	51 min
Mar 26, 10:22 AM CDT	River Flood Warning	MOB	10 days
Mar 26, 5:36 PM CDT	Mesoscale Discussion	SPC	54 min
Mar 26, 5:56 PM CDT	Tornado Watch	SPC	7 hr
Mar 26, 8:22 PM CDT	Areal Flood Advisory	MOB	3 hr
Mar 27, 12:48 AM CDT	Tornado Watch	SPC	7 hr
Mar 27, 1:07 AM CDT	Flash Flood Warning	MOB	4 hr
Mar 27, 2:23 AM CDT	Mesoscale Discussion	SPC	67 min
Mar 27, 6:18 PM CDT	Mesoscale Discussion	SPC	57 min
Mar 27, 8:21 PM CDT	Mesoscale Discussion	SPC	84 min
Mar 27, 10:09 PM CDT	Tornado Watch	SPC	9 hr
Mar 27, 10:43 PM CDT	Severe Thunderstorm Warning	MOB	47 min
Mar 27, 11:05 PM CDT	Flash Flood Warning	MOB	115 min
Mar 27, 11:51 PM CDT	Mesoscale Discussion	SPC	84 min
Mar 28, 1:01 AM CDT	Flash Flood Warning	MOB	119 min
Mar 28, 3:14 AM CDT	Mesoscale Discussion	SPC	61 min
Mar 28, 4:25 AM CDT	Mesoscale Discussion	SPC	35 min
Mar 28, 4:50 AM CDT	Tornado Watch	SPC	5 hr
Mar 28, 9:49 AM CDT	River Flood Warning	MOB	5 days
Mar 28, 12:53 PM CDT	Areal Flood Warning	MOB	12 hr
Mar 28, 11:31 PM CDT	Areal Flood Warning	MOB	8 hr
Mar 31, 8:58 AM CDT	Mesoscale Discussion	SPC	92 min
Mar 31, 11:54 AM CDT	Mesoscale Discussion	SPC	96 min
Mar 31, 1:05 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Mar 31, 2:44 PM CDT	Mesoscale Discussion	SPC	91 min
Mar 31, 5:12 PM CDT	Mesoscale Discussion	SPC	93 min
Mar 31, 5:13 PM CDT	Severe Thunderstorm Warning	MOB	35 min
Mar 31, 10:16 PM CDT	Severe Thunderstorm Warning	MOB	29 min
Apr 2, 6:29 AM CDT	Tornado Watch	SPC	8 hr
Apr 2, 11:51 AM CDT	Mesoscale Discussion	SPC	84 min
Apr 2, 1:09 PM CDT	Mesoscale Discussion	SPC	66 min
Apr 2, 1:33 PM CDT	Tornado Watch	SPC	5 hr
Apr 2, 1:42 PM CDT	Severe Thunderstorm Warning	MOB	63 min
Apr 2, 1:53 PM CDT	Severe Thunderstorm Warning	MOB	52 min
Apr 5, 6:20 AM CDT	Freeze Watch	MOB	32 hr
Apr 5, 3:46 PM CDT	Wind Advisory	MOB	27 hr
Apr 6, 5:37 AM CDT	Freeze Watch	MOB	24 hr
Apr 6, 2:06 PM CDT	Freeze Warning	MOB	16 hr
Apr 7, 5:43 AM CDT	Freeze Warning	MOB	26 hr
Apr 12, 8:07 PM CDT	Mesoscale Discussion	SPC	53 min
Apr 12, 8:30 PM CDT	Tornado Watch	SPC	6 hr
Apr 12, 9:07 PM CDT	Severe Thunderstorm Warning	MOB	53 min
Apr 12, 10:42 PM CDT	Mesoscale Discussion	SPC	93 min
Apr 12, 11:11 PM CDT	Severe Thunderstorm Warning	MOB	64 min
Apr 12, 11:27 PM CDT	Tornado Warning	MOB	50 min
Apr 13, 12:55 AM CDT	Flash Flood Warning	MOB	3 hr
Apr 13, 3:50 AM CDT	Flash Flood Warning	MOB	3 hr
Apr 13, 4:51 AM CDT	River Flood Warning	MOB	6 days
Apr 13, 1:39 PM CDT	Mesoscale Discussion	SPC	66 min
Apr 13, 4:16 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 13, 6:55 PM CDT	Mesoscale Discussion	SPC	95 min
Apr 13, 8:35 PM CDT	Severe Thunderstorm Warning	MOB	55 min
Apr 13, 8:41 PM CDT	Tornado Warning	MOB	49 min
Apr 19, 12:43 PM CDT	Mesoscale Discussion	SPC	3 hr
Apr 19, 2:19 PM CDT	Tornado Watch	SPC	7 hr
Apr 24, 3:07 AM CDT	Dense Fog Advisory	MOB	5 hr
May 3, 10:56 AM CDT	Mesoscale Discussion	SPC	64 min
May 3, 11:35 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 4, 1:29 AM CDT	Severe Thunderstorm Warning	MOB	61 min
May 4, 2:09 AM CDT	Severe Thunderstorm Warning	MOB	51 min
May 4, 3:10 AM CDT	Flash Flood Warning	MOB	95 min
May 4, 4:58 AM CDT	Mesoscale Discussion	SPC	2 hr
May 4, 5:04 AM CDT	Flash Flood Watch	MOB	7 hr
May 4, 5:28 AM CDT	Flash Flood Warning	MOB	2 hr
May 4, 6:55 AM CDT	Flash Flood Warning	MOB	3 hr
May 4, 8:43 AM CDT	Severe Thunderstorm Warning	MOB	62 min
May 4, 8:56 AM CDT	Flash Flood Warning	MOB	4 hr
May 4, 11:17 AM CDT	River Flood Warning	MOB	72 hr
May 5, 3:31 PM CDT	Severe Thunderstorm Warning	MOB	24 min
May 5, 6:48 PM CDT	Severe Thunderstorm Warning	MOB	42 min
May 6, 12:37 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 6, 2:56 PM CDT	Severe Thunderstorm Warning	MOB	44 min
May 6, 3:16 PM CDT	Flash Flood Warning	MOB	2 hr
May 6, 3:34 PM CDT	Flash Flood Watch	MOB	5 hr
May 10, 7:50 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 11, 2:20 PM CDT	Mesoscale Discussion	SPC	55 min
May 12, 4:53 AM CDT	Areal Flood Advisory	MOB	3 hr
May 23, 3:53 AM CDT	Flash Flood Watch	MOB	15 hr
May 23, 10:11 AM CDT	Wind Advisory	MOB	5 hr
May 23, 2:55 PM CDT	Areal Flood Advisory	MOB	3 hr
Jun 21, 4:00 AM CDT	Heat Advisory	MOB	63 hr
Jun 24, 1:28 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 27, 4:10 PM CDT	Excessive Heat Watch	MOB	7 hr
Jun 27, 11:30 PM CDT	Heat Advisory	MOB	18 hr
Jul 4, 6:34 PM CDT	Areal Flood Advisory	MOB	2 hr
Jul 12, 5:15 PM CDT	Areal Flood Advisory	MOB	3 hr
Jul 13, 9:32 AM CDT	Mesoscale Discussion	SPC	88 min
Jul 26, 2:51 PM CDT	Severe Thunderstorm Warning	MOB	39 min
Aug 18, 1:43 PM CDT	Areal Flood Advisory	MOB	2 hr
Sep 15, 11:14 AM CDT	Mesoscale Discussion	SPC	2 hr
Oct 8, 6:59 AM CDT	Dense Fog Advisory	MOB	2 hr
Oct 14, 1:34 AM CDT	Mesoscale Discussion	SPC	116 min
Oct 15, 7:48 PM CDT	Severe Thunderstorm Warning	MOB	57 min
Oct 18, 6:11 AM CDT	Frost Advisory	MOB	27 hr
Oct 28, 3:24 AM CDT	Dense Fog Advisory	MOB	3 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, 2:11 PM CDT	Mesoscale Discussion	SPC	94 min
Oct 30, 4:57 PM CDT	Mesoscale Discussion	SPC	93 min
Oct 30, 5:20 PM CDT	Tornado Watch	SPC	3 hr
Oct 30, 7:58 PM CDT	Mesoscale Discussion	SPC	92 min
Nov 8, 8:43 PM CST	Inland Tropical Storm Watch	MOB	2 hr
Nov 8, 9:42 PM CST	Flash Flood Watch	MOB	35 hr
Nov 8, 10:23 PM CST	Inland Tropical Storm Warning	MOB	35 hr
Nov 10, 9:31 AM CST	Wind Advisory	MOB	11 hr
Nov 16, 3:55 AM CST	Dense Fog Advisory	MOB	4 hr
Nov 18, 2:43 AM CST	Frost Advisory	MOB	28 hr
Nov 25, 3:34 PM CST	Freeze Watch	MOB	13 hr
Nov 26, 4:55 AM CST	Freeze Warning	MOB	26 hr
Nov 30, 3:54 PM CST	Flash Flood Watch	MOB	43 hr
Dec 1, 3:16 PM CST	Wind Advisory	MOB	27 hr
Dec 3, 4:17 PM CST	Winter Storm Watch	MOB	12 hr
Dec 4, 4:00 AM CST	Winter Weather Advisory	MOB	23 hr
Dec 4, 12:13 PM CST	Mesoscale Discussion	SPC	4 hr
Dec 4, 11:18 PM CST	Mesoscale Discussion	SPC	6 hr
Dec 5, 4:42 AM CST	Hard Freeze Warning	MOB	24 hr
Dec 8, 7:14 AM CST	Areal Flood Advisory	MOB	2 hr
Dec 8, 5:55 PM CST	Mesoscale Discussion	SPC	95 min
Dec 8, 6:12 PM CST	Tornado Watch	SPC	8 hr
Dec 8, 9:47 PM CST	Mesoscale Discussion	SPC	88 min
Dec 12, 9:42 AM CST	Areal Flood Advisory	MOB	6 hr
Dec 12, 7:41 PM CST	River Flood Warning	MOB	16 days
Dec 13, 12:51 PM CST	Dense Fog Advisory	MOB	21 hr
Dec 13, 3:50 PM CST	Flash Flood Watch	MOB	50 hr
Dec 14, 10:08 AM CST	Mesoscale Discussion	SPC	3 hr
Dec 14, 10:14 AM CST	Dense Fog Advisory	MOB	106 min
Dec 14, 2:01 PM CST	Flash Flood Warning	MOB	3 hr
Dec 14, 4:53 PM CST	Mesoscale Discussion	SPC	2 hr
Dec 14, 6:49 PM CST	Flash Flood Warning	MOB	101 min
Dec 14, 6:59 PM CST	Flash Flood Warning	MOB	91 min
Dec 14, 7:04 PM CST	Flash Flood Warning	MOB	86 min
Dec 14, 8:47 PM CST	Areal Flood Advisory	MOB	118 min
Dec 15, 1:18 AM CST	Areal Flood Warning	MOB	8 hr
Dec 15, 3:22 AM CST	Mesoscale Discussion	SPC	83 min
Dec 15, 5:57 AM CST	Flash Flood Warning	MOB	6 hr
Dec 15, 9:22 AM CST	Areal Flood Warning	MOB	8 hr
Dec 17, 5:10 AM CST	Flash Flood Watch	MOB	30 hr
Dec 23, 3:29 PM CST	Wind Advisory	MOB	30 hr
Dec 24, 9:34 AM CST	Mesoscale Discussion	SPC	56 min
Dec 24, 10:13 AM CST	Mesoscale Discussion	SPC	62 min
Dec 24, 10:37 AM CST	Tornado Watch	SPC	7 hr
Dec 24, 1:14 PM CST	Mesoscale Discussion	SPC	61 min
Dec 24, 3:24 PM CST	Severe Thunderstorm Warning	MOB	66 min
Dec 24, 3:33 PM CST	Mesoscale Discussion	SPC	57 min
Dec 24, 3:37 PM CST	Severe Thunderstorm Warning	MOB	53 min

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	19
Tornado Warning	2
Severe Thunderstorm Watch	6
Tornado Watch	15
Mesoscale Discussion	50
Flooding
Areal Flood Warning	4
Flash Flood Warning	15
River Flood Warning	6
Flash Flood Watch	9
Areal Flood Advisory	10
Winter
Winter Storm Watch	1
Winter Weather Advisory	1
Heat
Excessive Heat Watch	1
Heat Advisory	2
Cold
Freeze Warning	3
Hard Freeze Warning	5
Freeze Watch	3
Hard Freeze Watch	5
Frost Advisory	2
Wind and dust
Wind Advisory	6
Fog and smoke
Dense Fog Advisory	16
Tropical
Inland Tropical Storm Warning	1
Inland Tropical Storm Watch	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.