Alert archive / Mississippi / Perry County

Weather alerts in Perry County, Mississippi, 2020

152 weather alerts in 2020, 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 2020. Tap one for its archive.

Alerts: 152
Warnings: 40
Watches: 18
Advisories: 35
Busiest month: April25 alerts
Busiest day: January 11, 20207 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 Perry County in 2020 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 8 minutes after it went out.

Perry County, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	1	67%	1	100%	8 min
Severe thunderstorm warnings	19	9	53%	7	71%	30 min
Flash flood warnings	3	0	100%	0

Each office's whole area, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Mobile, AL: tornado warnings	82	14	83%	32	69%	7 min
NWS Mobile, AL: severe thunderstorm warnings	263	91	65%	273	74%	24 min
NWS Mobile, AL: flash flood warnings	37	8	78%	32	97%	286 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 3, 2:01 PM CST	River Flood Warning	MOB	6 days
Jan 9, 2:56 PM CST	Wind Advisory	MOB	48 hr
Jan 11, 7:39 AM CST	Mesoscale Discussion	SPC	96 min
Jan 11, 7:57 AM CST	Tornado Watch	SPC	9 hr
Jan 11, 9:54 AM CST	Mesoscale Discussion	SPC	96 min
Jan 11, 10:06 AM CST	Severe Thunderstorm Warning	MOB	54 min
Jan 11, 10:13 AM CST	Severe Thunderstorm Warning	MOB	47 min
Jan 11, 10:55 AM CST	Severe Thunderstorm Warning	MOB	50 min
Jan 11, 10:55 AM CST	Severe Thunderstorm Warning	MOB	50 min
Jan 12, 1:27 AM CST	Dense Fog Advisory	MOB	8 hr
Jan 12, 2:28 PM CST	Dense Fog Advisory	MOB	22 hr
Jan 13, 10:17 AM CST	River Flood Warning	MOB	10 days
Jan 13, 12:03 PM CST	Dense Fog Advisory	MOB	21 hr
Jan 14, 3:28 PM CST	Dense Fog Advisory	MOB	20 hr
Jan 15, 3:26 PM CST	Dense Fog Advisory	MOB	18 hr
Jan 18, 12:43 PM CST	Mesoscale Discussion	SPC	2 hr
Jan 23, 10:07 PM CST	Dense Fog Advisory	MOB	8 hr
Jan 27, 11:20 PM CST	Dense Fog Advisory	MOB	10 hr
Jan 30, 6:35 AM CST	Dense Fog Advisory	MOB	2 hr
Feb 5, 11:16 AM CST	Mesoscale Discussion	SPC	119 min
Feb 5, 5:06 PM CST	Mesoscale Discussion	SPC	84 min
Feb 5, 5:50 PM CST	Tornado Watch	SPC	6 hr
Feb 5, 11:15 PM CST	Mesoscale Discussion	SPC	2 hr
Feb 5, 11:48 PM CST	Tornado Watch	SPC	8 hr
Feb 6, 4:02 AM CST	Severe Thunderstorm Warning	MOB	43 min
Feb 6, 5:03 AM CST	Special Weather Statement	MOB	42 min
Feb 6, 8:53 PM CST	River Flood Warning	MOB	21 days
Feb 10, 4:33 PM CST	Mesoscale Discussion	SPC	87 min
Feb 17, 3:19 PM CST	Dense Fog Advisory	MOB	19 hr
Feb 20, 9:27 AM CST	River Flood Warning	MOB	7 days
Mar 3, 10:13 AM CST	River Flood Warning	MOB	8 days
Mar 3, 12:31 PM CST	Flash Flood Watch	MOB	45 hr
Mar 4, 1:19 AM CST	Mesoscale Discussion	SPC	2 hr
Mar 4, 1:53 AM CST	Tornado Watch	SPC	8 hr
Mar 4, 5:05 PM CST	Mesoscale Discussion	SPC	2 hr
Mar 10, 12:18 PM CDT	Dense Fog Advisory	MOB	22 hr
Mar 13, 12:59 PM CDT	Dense Fog Advisory	MOB	21 hr
Mar 31, 7:53 AM CDT	Mesoscale Discussion	SPC	2 hr
Mar 31, 7:59 AM CDT	Severe Thunderstorm Warning	MOB	46 min
Mar 31, 8:41 AM CDT	Severe Thunderstorm Warning	MOB	49 min
Mar 31, 8:51 AM CDT	Tornado Watch	SPC	6 hr
Mar 31, 9:08 AM CDT	Severe Thunderstorm Warning	MOB	37 min
Apr 11, 4:16 AM CDT	Wind Advisory	MOB	48 hr
Apr 12, 3:53 PM CDT	Mesoscale Discussion	SPC	97 min
Apr 12, 4:38 PM CDT	Tornado Watch PDS	SPC	7 hr
Apr 12, 7:36 PM CDT	Mesoscale Discussion	SPC	84 min
Apr 12, 8:02 PM CDT	Areal Flood Advisory	MOB	3 hr
Apr 12, 9:05 PM CDT	Severe Thunderstorm Warning	MOB	25 min
Apr 12, 9:09 PM CDT	Severe Thunderstorm Warning	MOB	36 min
Apr 18, 3:42 PM CDT	Wind Advisory	MOB	34 hr
Apr 19, 11:06 AM CDT	Mesoscale Discussion	SPC	54 min
Apr 19, 3:56 PM CDT	Tornado Watch	SPC	6 hr
Apr 19, 6:37 PM CDT	Mesoscale Discussion	SPC	53 min
Apr 19, 7:42 PM CDT	Mesoscale Discussion	SPC	33 min
Apr 19, 7:58 PM CDT	Severe Thunderstorm Warning	MOB	47 min
Apr 19, 8:05 PM CDT	Tornado Warning	MOB	37 min
Apr 19, 8:10 PM CDT	Flash Flood Warning	MOB	3 hr
Apr 19, 8:45 PM CDT	Severe Thunderstorm Warning	MOB	30 min
Apr 19, 9:07 PM CDT	Mesoscale Discussion	SPC	83 min
Apr 19, 9:39 PM CDT	Tornado Watch	SPC	5 hr
Apr 23, 2:28 AM CDT	Mesoscale Discussion	SPC	92 min
Apr 23, 4:05 AM CDT	Tornado Watch	SPC	11 hr
Apr 23, 5:35 AM CDT	Severe Thunderstorm Warning	MOB	40 min
Apr 23, 6:03 AM CDT	Severe Thunderstorm Warning	MOB	42 min
Apr 23, 11:01 AM CDT	River Flood Warning	MOB	6 days
Apr 23, 1:37 PM CDT	Mesoscale Discussion	SPC	113 min
Apr 29, 6:27 AM CDT	Special Weather Statement	MOB	63 min
May 5, 2:03 PM CDT	Red Flag Warning	MOB	32 hr
May 8, 9:30 AM CDT	Mesoscale Discussion	SPC	2 hr
May 17, 2:33 PM CDT	Special Weather Statement	MOB	57 min
May 24, 3:28 PM CDT	Special Weather Statement	MOB	32 min
May 27, 12:16 PM CDT	Mesoscale Discussion	SPC	89 min
May 27, 12:55 PM CDT	Severe Thunderstorm Warning	MOB	50 min
May 27, 1:40 PM CDT	Severe Thunderstorm Warning	MOB	22 min
May 27, 1:49 PM CDT	Areal Flood Advisory	MOB	116 min
May 27, 2:36 PM CDT	Mesoscale Discussion	SPC	84 min
Jun 5, 4:06 PM CDT	Flash Flood Watch	MOB	3 days
Jun 5, 6:29 PM CDT	Special Weather Statement	MOB	46 min
Jun 5, 8:29 PM CDT	Special Weather Statement	MOB	61 min
Jun 6, 2:01 PM CDT	River Flood Warning	MOB	4 days
Jun 7, 11:25 AM CDT	Wind Advisory	MOB	26 hr
Jun 7, 7:52 PM CDT	Mesoscale Discussion	SPC	113 min
Jun 7, 10:38 PM CDT	Flash Flood Warning	MOB	6 hr
Jun 8, 5:04 AM CDT	Areal Flood Warning	MOB	12 hr
Jun 24, 6:08 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 24, 10:04 AM CDT	Special Weather Statement	MOB	41 min
Jun 24, 10:27 AM CDT	Tornado Warning	MOB	48 min
Jun 24, 10:43 AM CDT	Tornado Warning	MOB	47 min
Jun 24, 12:58 PM CDT	Severe Thunderstorm Warning	MOB	62 min
Jun 24, 1:10 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 25, 5:38 PM CDT	Special Weather Statement	MOB	67 min
Jul 1, 1:55 PM CDT	Special Weather Statement	MOB	95 min
Jul 4, 3:06 PM CDT	Special Weather Statement	MOB	39 min
Jul 7, 2:51 PM CDT	Special Weather Statement	MOB	39 min
Jul 9, 9:16 PM CDT	Heat Advisory	MOB	17 hr
Jul 10, 9:55 AM CDT	Areal Flood Advisory	MOB	2 hr
Jul 10, 3:16 PM CDT	Heat Advisory	MOB	27 hr
Jul 11, 2:30 PM CDT	Heat Advisory	MOB	28 hr
Jul 12, 2:51 PM CDT	Mesoscale Discussion	SPC	84 min
Jul 12, 3:26 PM CDT	Heat Advisory	MOB	28 hr
Jul 12, 6:28 PM CDT	Mesoscale Discussion	SPC	92 min
Jul 12, 6:33 PM CDT	Severe Thunderstorm Warning	MOB	42 min
Jul 12, 7:59 PM CDT	Special Weather Statement	MOB	61 min
Jul 13, 2:29 PM CDT	Heat Advisory	MOB	29 hr
Jul 15, 12:24 PM CDT	Mesoscale Discussion	SPC	96 min
Jul 15, 4:22 PM CDT	Special Weather Statement	MOB	38 min
Jul 25, 11:38 AM CDT	Areal Flood Advisory	MOB	3 hr
Jul 25, 12:27 PM CDT	Special Weather Statement	MOB	93 min
Jul 25, 2:29 PM CDT	Areal Flood Advisory	MOB	2 hr
Aug 12, 2:24 PM CDT	Special Weather Statement	MOB	36 min
Aug 12, 3:10 PM CDT	Special Weather Statement	MOB	35 min
Aug 12, 5:21 PM CDT	Special Weather Statement	MOB	39 min
Aug 14, 2:05 PM CDT	Special Weather Statement	MOB	55 min
Aug 16, 7:29 PM CDT	Special Weather Statement	MOB	61 min
Aug 16, 7:39 PM CDT	Severe Thunderstorm Warning	MOB	66 min
Aug 16, 8:28 PM CDT	Special Weather Statement	MOB	62 min
Aug 25, 4:20 PM CDT	Special Weather Statement	MOB	25 min
Aug 27, 2:41 PM CDT	Mesoscale Discussion	SPC	94 min
Aug 28, 4:14 PM CDT	Areal Flood Advisory	MOB	2 hr
Sep 1, 11:12 AM CDT	Heat Advisory	MOB	7 hr
Sep 12, 4:00 PM CDT	Flash Flood Watch	MOB	4 days
Sep 12, 4:16 PM CDT	Tropical Storm Watch	MOB	66 hr
Sep 13, 4:27 AM CDT	Tropical Storm Warning	MOB	4 days
Sep 14, 9:40 AM CDT	River Flood Warning	MOB	21 days
Sep 16, 1:35 PM CDT	Wind Advisory	MOB	10 hr
Sep 27, 4:17 AM CDT	Dense Fog Advisory	MOB	5 hr
Sep 28, 2:45 PM CDT	Special Weather Statement	MOB	60 min
Oct 9, 4:31 AM CDT	Wind Advisory	MOB	29 hr
Oct 10, 2:23 AM CDT	Mesoscale Discussion	SPC	2 hr
Oct 26, 4:26 PM CDT	Tropical Storm Watch	MOB	14 hr
Oct 27, 4:44 AM CDT	Tropical Storm Warning	MOB	50 hr
Oct 27, 2:29 PM CDT	Flash Flood Watch	MOB	34 hr
Oct 28, 10:36 AM CDT	Hurricane Warning	MOB	15 hr
Oct 28, 11:26 AM CDT	Mesoscale Discussion	SPC	3 hr
Oct 28, 1:03 PM CDT	Tornado Watch	SPC	11 hr
Oct 28, 8:43 PM CDT	Flash Flood Warning	MOB	5 hr
Oct 29, 10:09 AM CDT	River Flood Warning	MOB	23 hr
Nov 25, 12:44 PM CST	Mesoscale Discussion	SPC	2 hr
Nov 25, 12:58 PM CST	Special Weather Statement	MOB	47 min
Nov 25, 1:43 PM CST	Special Weather Statement	MOB	47 min
Nov 26, 5:20 PM CST	Dense Fog Advisory	MOB	15 hr
Nov 27, 4:37 PM CST	Mesoscale Discussion	SPC	113 min
Nov 29, 2:32 AM CST	Freeze Watch	MOB	21 hr
Nov 29, 11:09 PM CST	Freeze Warning	MOB	33 hr
Nov 30, 1:37 AM CST	Wind Advisory	MOB	15 hr
Dec 10, 2:42 PM CST	Dense Fog Advisory	MOB	19 hr
Dec 12, 9:41 PM CST	Dense Fog Advisory	MOB	11 hr
Dec 13, 10:44 PM CST	Special Weather Statement	MOB	76 min
Dec 23, 1:53 PM CST	Wind Advisory	MOB	27 hr
Dec 23, 10:51 PM CST	Mesoscale Discussion	SPC	114 min
Dec 24, 1:02 AM CST	Mesoscale Discussion	SPC	58 min
Dec 24, 1:42 AM CST	Tornado Watch	SPC	7 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	19
Tornado Warning	3
Tornado Watch	11
Mesoscale Discussion	34
Special Weather Statement	25
Flooding
Areal Flood Warning	1
Flash Flood Warning	3
River Flood Warning	9
Flash Flood Watch	4
Areal Flood Advisory	6
Heat
Heat Advisory	6
Cold
Freeze Warning	1
Freeze Watch	1
Wind and dust
Wind Advisory	8
Fire
Red Flag Warning	1
Fog and smoke
Dense Fog Advisory	15
Tropical
Hurricane Warning	1
Tropical Storm Warning	2
Tropical Storm Watch	2

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2019 2021

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.