Alert archive / Mississippi / Walthall County

Weather alerts in Walthall County, Mississippi, 2021

154 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Walthall County and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts: 154
Warnings: 45
Watches: 29
Advisories: 42
Busiest month: April24 alerts
Busiest day: April 24, 20219 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 1 tornado warnings covering Walthall County in 2021 had a tornado report inside them.

Walthall County, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	0
Severe thunderstorm warnings	15	6	60%	8	100%	20 min
Flash flood warnings	5	0	100%	0

Each office's whole area, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS New Orleans, LA: tornado warnings	79	16	80%	39	69%	8 min
NWS New Orleans, LA: severe thunderstorm warnings	154	36	77%	116	57%	14 min
NWS New Orleans, LA: flash flood warnings	130	52	60%	134	85%	91 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
Feb 10, 3:16 PM CST	Dense Fog Advisory	LIX	18 hr
Feb 11, 9:10 AM CST	Tornado Warning	LIX	28 min
Feb 11, 10:27 AM CST	Areal Flood Advisory	LIX	3 hr
Feb 11, 11:26 AM CST	River Flood Warning	LIX	32 hr
Feb 13, 4:06 AM CST	Winter Storm Watch	LIX	24 hr
Feb 14, 4:20 AM CST	Hard Freeze Watch	LIX	15 hr
Feb 14, 4:20 AM CST	Wind Chill Watch	LIX	15 hr
Feb 14, 4:20 AM CST	Winter Storm Warning	LIX	36 hr
Feb 14, 7:17 PM CST	Hard Freeze Warning	LIX	41 hr
Feb 14, 7:17 PM CST	Hard Freeze Warning	LIX	41 hr
Feb 14, 7:17 PM CST	Wind Chill Advisory	LIX	41 hr
Feb 15, 3:09 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 15, 9:28 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 16, 6:21 PM CST	Hard Freeze Warning	LIX	14 hr
Feb 16, 10:02 PM CST	Winter Weather Advisory	LIX	14 hr
Feb 18, 10:04 AM CST	Hard Freeze Warning	LIX	23 hr
Feb 19, 11:43 AM CST	Hard Freeze Warning	LIX	20 hr
Mar 12, 3:19 PM CST	Dense Fog Advisory	LIX	18 hr
Mar 16, 6:06 AM CDT	Special Weather Statement	LIX	39 min
Mar 17, 1:45 PM CDT	Mesoscale Discussion	SPC	90 min
Mar 17, 2:38 PM CDT	Tornado Watch	SPC	8 hr
Mar 17, 5:29 PM CDT	Special Weather Statement	LIX	46 min
Mar 17, 5:40 PM CDT	Severe Thunderstorm Warning	LIX	31 min
Mar 22, 12:37 PM CDT	Flash Flood Watch	LIX	63 hr
Mar 23, 10:31 AM CDT	Special Weather Statement	LIX	29 min
Mar 23, 10:41 AM CDT	River Flood Warning	LIX	62 hr
Mar 24, 2:47 PM CDT	Wind Advisory	LIX	25 hr
Mar 24, 9:25 PM CDT	Mesoscale Discussion	SPC	65 min
Mar 24, 10:19 PM CDT	Severe Thunderstorm Warning	LIX	26 min
Mar 25, 2:26 PM CDT	River Flood Warning	LIX	40 hr
Mar 25, 3:09 PM CDT	Special Weather Statement	LIX	36 min
Mar 25, 3:12 PM CDT	Severe Thunderstorm Warning	LIX	10 min
Mar 25, 3:33 PM CDT	Severe Thunderstorm Warning	LIX	27 min
Mar 25, 3:48 PM CDT	Special Weather Statement	LIX	27 min
Mar 25, 4:11 PM CDT	Special Weather Statement	LIX	34 min
Mar 30, 5:46 PM CDT	Mesoscale Discussion	SPC	119 min
Apr 1, 3:23 PM CDT	Frost Advisory	LIX	17 hr
Apr 7, 8:52 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 7, 11:44 PM CDT	Mesoscale Discussion	SPC	3 hr
Apr 8, 12:39 AM CDT	Severe Thunderstorm Warning	LIX	66 min
Apr 9, 10:25 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 9, 11:00 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 10, 12:12 AM CDT	Severe Thunderstorm Warning	LIX	33 min
Apr 10, 12:16 AM CDT	Tornado Watch	SPC	7 hr
Apr 10, 12:46 AM CDT	Severe Thunderstorm Warning	LIX	43 min
Apr 10, 9:49 AM CDT	River Flood Warning	LIX	56 hr
Apr 13, 4:14 AM CDT	Flash Flood Watch	LIX	5 days
Apr 13, 10:16 AM CDT	River Flood Warning	LIX	4 days
Apr 15, 3:10 AM CDT	Special Weather Statement	LIX	65 min
Apr 23, 3:17 PM CDT	Flash Flood Watch	LIX	18 hr
Apr 23, 8:17 PM CDT	Special Weather Statement	LIX	28 min
Apr 23, 8:30 PM CDT	Tornado Watch	SPC	8 hr
Apr 23, 9:20 PM CDT	River Flood Warning	LIX	70 hr
Apr 23, 9:28 PM CDT	Severe Thunderstorm Warning	LIX	47 min
Apr 23, 10:02 PM CDT	Severe Thunderstorm Warning	LIX	13 min
Apr 23, 10:29 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 23, 11:46 PM CDT	Severe Thunderstorm Warning	LIX	44 min
Apr 24, 1:26 AM CDT	Severe Thunderstorm Warning	LIX	49 min
Apr 24, 12:29 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 27, 2:19 AM CDT	Dense Fog Advisory	LIX	7 hr
May 1, 2:46 PM CDT	Flash Flood Watch	LIX	24 hr
May 4, 4:11 AM CDT	Flash Flood Watch	LIX	33 hr
May 4, 8:33 AM CDT	Mesoscale Discussion	SPC	117 min
May 4, 3:31 PM CDT	Tornado Watch	SPC	6 hr
May 4, 3:33 PM CDT	Severe Thunderstorm Warning	LIX	42 min
May 4, 4:10 PM CDT	Severe Thunderstorm Warning	LIX	65 min
May 4, 4:46 PM CDT	Mesoscale Discussion	SPC	89 min
May 9, 8:48 PM CDT	Flash Flood Watch	LIX	15 hr
May 11, 3:11 AM CDT	Flash Flood Watch	LIX	39 hr
May 11, 10:34 AM CDT	Special Weather Statement	LIX	56 min
May 12, 9:24 AM CDT	River Flood Warning	LIX	45 hr
May 17, 2:56 PM CDT	Flash Flood Watch	LIX	4 days
May 18, 1:12 AM CDT	High Wind Warning	LIX	6 hr
Jun 2, 7:01 PM CDT	Special Weather Statement	LIX	74 min
Jun 4, 10:56 AM CDT	Flash Flood Watch	LIX	56 hr
Jun 6, 9:56 AM CDT	Mesoscale Discussion	SPC	3 hr
Jun 6, 11:58 AM CDT	Flash Flood Warning	LIX	3 hr
Jun 13, 12:22 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 13, 12:51 PM CDT	Mesoscale Discussion	SPC	114 min
Jun 13, 5:53 PM CDT	Severe Thunderstorm Warning	LIX	65 min
Jun 14, 4:08 AM CDT	Heat Advisory	LIX	8 hr
Jun 17, 1:36 PM CDT	Flash Flood Watch	LIX	47 hr
Jun 18, 9:44 AM CDT	Wind Advisory	LIX	30 hr
Jul 4, 7:07 PM CDT	Special Weather Statement	LIX	38 min
Jul 16, 4:51 PM CDT	Special Weather Statement	LIX	24 min
Jul 19, 2:46 PM CDT	Severe Thunderstorm Warning	LIX	24 min
Jul 20, 6:23 AM CDT	Areal Flood Advisory	LIX	3 hr
Jul 20, 6:46 AM CDT	Flash Flood Warning	LIX	3 hr
Jul 24, 3:20 PM CDT	Heat Advisory	LIX	28 hr
Jul 25, 3:20 PM CDT	Heat Advisory	LIX	28 hr
Jul 26, 3:11 PM CDT	Heat Advisory	LIX	28 hr
Jul 27, 3:27 PM CDT	Heat Advisory	LIX	28 hr
Jul 28, 1:44 PM CDT	Heat Advisory	LIX	29 hr
Jul 28, 1:44 PM CDT	Heat Advisory	LIX	38 hr
Jul 29, 1:40 PM CDT	Excessive Heat Watch	LIX	26 hr
Jul 29, 1:40 PM CDT	Excessive Heat Warning	LIX	29 hr
Jul 30, 3:55 PM CDT	Excessive Heat Warning	LIX	24 hr
Jul 31, 3:57 PM CDT	Excessive Heat Warning	LIX	2 hr
Jul 31, 3:57 PM CDT	Heat Advisory	LIX	26 hr
Aug 3, 7:08 PM CDT	Areal Flood Advisory	LIX	2 hr
Aug 9, 4:32 PM CDT	Special Weather Statement	LIX	58 min
Aug 11, 2:31 PM CDT	Special Weather Statement	LIX	74 min
Aug 19, 1:26 PM CDT	Heat Advisory	LIX	30 hr
Aug 20, 1:26 PM CDT	Heat Advisory	LIX	26 hr
Aug 21, 3:30 PM CDT	Heat Advisory	LIX	28 hr
Aug 22, 3:26 PM CDT	Heat Advisory	LIX	28 hr
Aug 23, 1:57 PM CDT	Heat Advisory	LIX	29 hr
Aug 26, 10:09 PM CDT	Hurricane Watch	LIX	36 hr
Aug 27, 10:46 AM CDT	Tropical Storm Watch	LIX	5 hr
Aug 27, 4:01 PM CDT	Hurricane Warning	LIX	60 hr
Aug 27, 4:01 PM CDT	Tropical Storm Warning	LIX	24 days
Aug 28, 2:36 AM CDT	Flood Watch	LIX	11 min
Aug 28, 3:13 AM CDT	Flash Flood Watch	LIX	61 hr
Aug 29, 6:07 AM CDT	Tornado Watch	SPC	13 hr
Aug 29, 10:04 AM CDT	Mesoscale Discussion	SPC	4 hr
Aug 29, 6:49 PM CDT	Tornado Watch	SPC	11 hr
Aug 29, 9:05 PM CDT	River Flood Warning	LIX	38 hr
Aug 30, 2:44 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 30, 2:55 AM CDT	Flash Flood Warning Considerable damage threat	LIX	5 hr
Aug 30, 3:55 AM CDT	Flash Flood Warning	LIX	5 hr
Aug 30, 11:04 AM CDT	Areal Flood Warning	LIX	35 hr
Aug 31, 4:06 AM CDT	Heat Advisory	LIX	38 hr
Aug 31, 9:46 PM CDT	Areal Flood Warning	LIX	35 hr
Sep 1, 1:00 AM CDT	Heat Advisory	LIX	40 hr
Sep 1, 7:21 PM CDT	Mesoscale Discussion	SPC	84 min
Sep 4, 3:28 PM CDT	Heat Advisory	LIX	27 hr
Sep 6, 4:00 AM CDT	Flash Flood Watch	LIX	17 hr
Sep 6, 9:39 AM CDT	Special Weather Statement	LIX	36 min
Sep 13, 2:45 PM CDT	Flash Flood Watch	LIX	5 days
Sep 15, 9:02 AM CDT	River Flood Warning	LIX	46 hr
Sep 28, 6:48 AM CDT	Dense Fog Advisory	LIX	2 hr
Oct 4, 3:09 AM CDT	Dense Fog Advisory	LIX	6 hr
Oct 6, 5:52 AM CDT	Dense Fog Advisory	LIX	3 hr
Oct 14, 3:25 PM CDT	Dense Fog Advisory	LIX	18 hr
Oct 21, 3:38 AM CDT	Dense Fog Advisory	LIX	5 hr
Oct 27, 12:50 PM CDT	Mesoscale Discussion	SPC	85 min
Oct 27, 1:53 PM CDT	Tornado Watch	SPC	8 hr
Oct 27, 3:25 PM CDT	Mesoscale Discussion	SPC	95 min
Oct 27, 4:53 PM CDT	Special Weather Statement	LIX	37 min
Oct 27, 5:13 PM CDT	Mesoscale Discussion	SPC	2 hr
Oct 27, 6:19 PM CDT	Flash Flood Warning	LIX	2 hr
Nov 11, 9:19 PM CST	Dense Fog Advisory	LIX	12 hr
Nov 26, 1:47 PM CST	Freeze Warning	LIX	18 hr
Nov 28, 9:24 PM CST	Dense Fog Advisory	LIX	11 hr
Dec 1, 4:08 PM CST	Dense Fog Advisory	LIX	18 hr
Dec 2, 3:26 PM CST	Dense Fog Advisory	LIX	19 hr
Dec 3, 10:02 AM CST	Dense Fog Advisory	LIX	70 min
Dec 3, 3:32 PM CST	Dense Fog Advisory	LIX	18 hr
Dec 4, 3:17 PM CST	Dense Fog Advisory	LIX	18 hr
Dec 6, 10:06 AM CST	Mesoscale Discussion	SPC	114 min
Dec 7, 4:57 PM CST	Dense Fog Advisory	LIX	16 hr
Dec 16, 3:22 PM CST	Dense Fog Advisory	LIX	18 hr
Dec 17, 7:00 PM CST	Dense Fog Advisory	LIX	15 hr
Dec 28, 1:18 PM CST	Mesoscale Discussion	SPC	2 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	15
Tornado Warning	1
Severe Thunderstorm Watch	2
Tornado Watch	7
Mesoscale Discussion	22
Special Weather Statement	16
Flooding
Areal Flood Warning	2
Flash Flood Warning	5
River Flood Warning	9
Flash Flood Watch	13
Flood Watch	1
Areal Flood Advisory	3
Winter
Winter Storm Warning	1
Winter Storm Watch	1
Winter Weather Advisory	1
Heat
Excessive Heat Warning	3
Excessive Heat Watch	1
Heat Advisory	16
Cold
Freeze Warning	1
Hard Freeze Warning	5
Hard Freeze Watch	1
Wind Chill Watch	1
Frost Advisory	1
Wind Chill Advisory	1
Wind and dust
High Wind Warning	1
Wind Advisory	2
Fog and smoke
Dense Fog Advisory	18
Tropical
Hurricane Warning	1
Tropical Storm Warning	1
Hurricane Watch	1
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 2020 2022

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.