Alert archive / Mississippi / Walthall County

Weather alerts in Walthall County, Mississippi, 2020

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

Alerts: 158
Warnings: 30
Watches: 20
Advisories: 29
Busiest month: April26 alerts
Busiest day: April 23, 20208 alerts

Over time

By month

Warning verification

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

4 of 12 tornado warnings covering Walthall County in 2020 had a tornado report inside them; 10 of 11 tornado reports fell inside a warning, on average 14 minutes after it went out.

Walthall County, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	12	4	67%	11	91%	14 min
Severe thunderstorm warnings	5	0	100%	1	0%
Flash flood warnings	0			0

Each office's whole area, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS New Orleans, LA: tornado warnings	99	10	90%	37	49%	10 min
NWS New Orleans, LA: severe thunderstorm warnings	133	30	77%	123	49%	17 min
NWS New Orleans, LA: flash flood warnings	30	11	63%	27	70%	77 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, 9:17 PM CST	Special Weather Statement	LIX	58 min
Jan 9, 3:08 PM CST	Wind Advisory	LIX	45 hr
Jan 10, 9:17 AM CST	Special Weather Statement	LIX	28 min
Jan 11, 5:18 AM CST	Tornado Watch	SPC	7 hr
Jan 11, 7:39 AM CST	Mesoscale Discussion	SPC	96 min
Jan 11, 8:01 AM CST	Special Weather Statement	LIX	59 min
Jan 11, 8:55 AM CST	Special Weather Statement	LIX	65 min
Jan 13, 8:20 AM CST	Dense Fog Advisory	LIX	52 hr
Jan 14, 3:10 PM CST	River Flood Warning	LIX	31 hr
Jan 18, 12:43 PM CST	Mesoscale Discussion	SPC	2 hr
Jan 20, 3:10 PM CST	Freeze Warning	LIX	18 hr
Jan 27, 11:53 PM CST	Dense Fog Advisory	LIX	8 hr
Feb 5, 1:19 PM CST	Mesoscale Discussion	SPC	86 min
Feb 5, 3:35 PM CST	Special Weather Statement	LIX	55 min
Feb 5, 3:56 PM CST	Tornado Warning	LIX	34 min
Feb 5, 5:06 PM CST	Mesoscale Discussion	SPC	84 min
Feb 5, 9:20 PM CST	Severe Thunderstorm Warning	LIX	25 min
Feb 5, 9:43 PM CST	Mesoscale Discussion	SPC	2 hr
Feb 5, 11:07 PM CST	Severe Thunderstorm Warning	LIX	27 min
Feb 5, 11:15 PM CST	Mesoscale Discussion	SPC	2 hr
Feb 6, 12:17 AM CST	Special Weather Statement	LIX	28 min
Feb 6, 8:29 AM CST	River Flood Warning	LIX	38 hr
Feb 10, 2:24 PM CST	Special Weather Statement	LIX	21 min
Feb 10, 4:33 PM CST	Mesoscale Discussion	SPC	87 min
Feb 12, 3:05 PM CST	Tornado Warning	LIX	10 min
Feb 17, 7:38 PM CST	Dense Fog Advisory	LIX	34 hr
Feb 18, 6:09 PM CST	Dense Fog Advisory	LIX	12 hr
Feb 21, 3:47 AM CST	Freeze Warning	LIX	27 hr
Mar 3, 11:38 AM CST	River Flood Warning	LIX	32 hr
Mar 3, 2:34 PM CST	Flash Flood Watch	LIX	29 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, 10:50 AM CST	Mesoscale Discussion	SPC	115 min
Mar 4, 5:05 PM CST	Mesoscale Discussion	SPC	2 hr
Mar 10, 9:51 PM CDT	Dense Fog Advisory	LIX	11 hr
Mar 11, 3:55 PM CDT	Dense Fog Advisory	LIX	19 hr
Mar 18, 4:12 AM CDT	Dense Fog Advisory	LIX	5 hr
Mar 31, 7:53 AM CDT	Mesoscale Discussion	SPC	2 hr
Apr 11, 12:47 PM CDT	Wind Advisory	LIX	33 hr
Apr 12, 1:02 PM CDT	Mesoscale Discussion	SPC	118 min
Apr 12, 1:24 PM CDT	Tornado Watch	SPC	9 hr
Apr 12, 3:28 PM CDT	Tornado Warning	LIX	32 min
Apr 12, 3:38 PM CDT	Mesoscale Discussion	SPC	97 min
Apr 12, 3:48 PM CDT	Tornado Warning	LIX	27 min
Apr 12, 4:14 PM CDT	Tornado Warning	LIX	26 min
Apr 12, 5:27 PM CDT	Mesoscale Discussion	SPC	63 min
Apr 12, 9:56 PM CDT	Special Weather Statement	LIX	49 min
Apr 18, 8:56 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 19, 4:13 AM CDT	Wind Advisory	LIX	19 hr
Apr 19, 11:06 AM CDT	Mesoscale Discussion	SPC	54 min
Apr 19, 11:45 AM CDT	Tornado Watch	SPC	9 hr
Apr 19, 2:39 PM CDT	Tornado Watch	SPC	9 hr
Apr 19, 6:37 PM CDT	Mesoscale Discussion	SPC	53 min
Apr 19, 6:39 PM CDT	Tornado Warning	LIX	38 min
Apr 22, 6:47 PM CDT	Mesoscale Discussion	SPC	88 min
Apr 22, 9:31 PM CDT	Mesoscale Discussion	SPC	89 min
Apr 22, 9:47 PM CDT	Tornado Watch	SPC	9 hr
Apr 23, 2:28 AM CDT	Mesoscale Discussion	SPC	92 min
Apr 23, 3:13 AM CDT	Tornado Warning Tornado observed	LIX	47 min
Apr 23, 1:37 PM CDT	Mesoscale Discussion	SPC	113 min
Apr 23, 1:52 PM CDT	Special Weather Statement	LIX	23 min
Apr 23, 2:13 PM CDT	Special Weather Statement	LIX	47 min
Apr 23, 2:15 PM CDT	Special Weather Statement	LIX	60 min
Apr 29, 5:07 AM CDT	Special Weather Statement	LIX	38 min
May 6, 10:26 AM CDT	Red Flag Warning	LIX	9 hr
May 8, 9:30 AM CDT	Mesoscale Discussion	SPC	2 hr
May 8, 9:57 AM CDT	Special Weather Statement	LIX	48 min
May 8, 11:42 AM CDT	Special Weather Statement	LIX	48 min
May 17, 12:54 PM CDT	Mesoscale Discussion	SPC	2 hr
May 23, 3:34 PM CDT	Special Weather Statement	LIX	41 min
May 23, 4:16 PM CDT	Special Weather Statement	LIX	29 min
May 27, 12:16 PM CDT	Mesoscale Discussion	SPC	89 min
May 27, 2:36 PM CDT	Mesoscale Discussion	SPC	84 min
Jun 3, 9:57 AM CDT	Flood Watch	LIX	5 days
Jun 3, 3:31 PM CDT	Special Weather Statement	LIX	59 min
Jun 3, 4:40 PM CDT	Special Weather Statement	LIX	35 min
Jun 3, 4:49 PM CDT	Areal Flood Advisory	LIX	3 hr
Jun 5, 4:11 PM CDT	Tropical Storm Warning	LIX	60 hr
Jun 5, 7:51 PM CDT	Special Weather Statement	LIX	84 min
Jun 5, 8:51 PM CDT	Special Weather Statement	LIX	54 min
Jun 6, 10:42 AM CDT	River Flood Warning	LIX	4 days
Jun 14, 4:24 PM CDT	Special Weather Statement	JAN	36 min
Jun 23, 5:14 PM CDT	Special Weather Statement	LIX	46 min
Jun 23, 6:03 PM CDT	Special Weather Statement	LIX	27 min
Jun 24, 5:29 AM CDT	Tornado Warning	LIX	31 min
Jun 24, 5:57 AM CDT	Tornado Warning	LIX	33 min
Jun 24, 6:08 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 24, 6:25 AM CDT	Tornado Warning	LIX	35 min
Jun 24, 6:44 AM CDT	Tornado Warning	LIX	31 min
Jun 24, 7:09 AM CDT	Tornado Warning	LIX	36 min
Jun 24, 1:03 PM CDT	Flash Flood Watch	LIX	29 hr
Jun 25, 3:43 PM CDT	Mesoscale Discussion	SPC	62 min
Jun 25, 4:02 PM CDT	Special Weather Statement	LIX	58 min
Jun 30, 9:34 AM CDT	Heat Advisory	LIX	33 hr
Jul 2, 2:14 PM CDT	Special Weather Statement	LIX	31 min
Jul 4, 4:40 PM CDT	Special Weather Statement	LIX	65 min
Jul 6, 8:14 AM CDT	Flash Flood Watch	LIX	33 hr
Jul 8, 2:51 PM CDT	Special Weather Statement	LIX	54 min
Jul 8, 3:35 PM CDT	Special Weather Statement	LIX	70 min
Jul 9, 8:46 PM CDT	Heat Advisory	LIX	23 hr
Jul 10, 3:23 PM CDT	Heat Advisory	LIX	29 hr
Jul 11, 3:03 PM CDT	Heat Advisory	LIX	29 hr
Jul 11, 9:28 PM CDT	Excessive Heat Warning	LIX	23 hr
Jul 12, 3:32 PM CDT	Heat Advisory	LIX	28 hr
Jul 13, 3:40 PM CDT	Heat Advisory	LIX	28 hr
Jul 15, 12:24 PM CDT	Mesoscale Discussion	SPC	96 min
Jul 15, 7:34 PM CDT	Special Weather Statement	LIX	26 min
Jul 19, 3:37 PM CDT	Special Weather Statement	LIX	53 min
Jul 26, 9:51 AM CDT	Special Weather Statement	LIX	24 min
Jul 26, 4:05 PM CDT	Special Weather Statement	JAN	25 min
Jul 27, 11:08 AM CDT	Areal Flood Advisory	LIX	112 min
Jul 28, 4:54 PM CDT	Special Weather Statement	LIX	36 min
Aug 14, 2:00 PM CDT	Special Weather Statement	LIX	45 min
Aug 15, 12:53 PM CDT	Severe Thunderstorm Warning	LIX	37 min
Aug 16, 7:34 PM CDT	Special Weather Statement	LIX	56 min
Aug 16, 7:44 PM CDT	Severe Thunderstorm Warning	LIX	46 min
Aug 16, 8:22 PM CDT	Severe Thunderstorm Warning	LIX	53 min
Aug 20, 1:44 PM CDT	Special Weather Statement	LIX	46 min
Aug 22, 4:35 PM CDT	Tropical Storm Watch	LIX	36 hr
Aug 26, 4:28 AM CDT	Flash Flood Watch	LIX	36 hr
Aug 27, 6:36 AM CDT	Mesoscale Discussion	SPC	114 min
Aug 27, 7:47 AM CDT	Tornado Watch	SPC	8 hr
Aug 27, 11:10 AM CDT	Mesoscale Discussion	SPC	2 hr
Sep 5, 5:06 PM CDT	Special Weather Statement	LIX	84 min
Sep 12, 4:13 PM CDT	Tropical Storm Watch	LIX	12 hr
Sep 12, 4:36 PM CDT	Flash Flood Watch	LIX	4 days
Sep 13, 4:25 AM CDT	Tropical Storm Warning	LIX	3 days
Sep 27, 4:29 AM CDT	Dense Fog Advisory	LIX	6 hr
Sep 28, 7:21 AM CDT	Dense Fog Advisory	LIX	99 min
Oct 7, 10:15 AM CDT	Tropical Storm Watch	LIX	42 hr
Oct 8, 7:17 PM CDT	Special Weather Statement	LIX	58 min
Oct 9, 4:24 AM CDT	Wind Advisory	LIX	29 hr
Oct 9, 3:50 PM CDT	Mesoscale Discussion	SPC	85 min
Oct 18, 11:52 PM CDT	Dense Fog Advisory	LIX	10 hr
Oct 19, 7:00 PM CDT	Dense Fog Advisory	LIX	12 hr
Oct 26, 4:12 PM CDT	Tropical Storm Watch	LIX	15 hr
Oct 27, 7:00 AM CDT	Tropical Storm Warning	LIX	39 hr
Oct 27, 1:50 PM CDT	Flood Watch	LIX	32 hr
Nov 25, 7:47 AM CST	Mesoscale Discussion	SPC	118 min
Nov 25, 10:16 AM CST	Special Weather Statement	LIX	44 min
Nov 25, 10:59 AM CST	Special Weather Statement	LIX	16 min
Nov 27, 3:38 AM CST	Dense Fog Advisory	LIX	5 hr
Nov 27, 1:00 PM CST	Mesoscale Discussion	SPC	3 hr
Nov 27, 3:33 PM CST	Special Weather Statement	LIX	27 min
Nov 29, 2:56 AM CST	Freeze Watch	LIX	24 hr
Nov 30, 3:09 AM CST	Freeze Warning	LIX	29 hr
Nov 30, 3:09 AM CST	Wind Advisory	LIX	14 hr
Dec 9, 11:01 PM CST	Dense Fog Advisory	LIX	11 hr
Dec 10, 3:15 PM CST	Dense Fog Advisory	LIX	16 hr
Dec 12, 5:06 AM CST	Special Weather Statement	LIX	54 min
Dec 12, 9:17 PM CST	Dense Fog Advisory	LIX	11 hr
Dec 13, 6:26 PM CST	Mesoscale Discussion	SPC	94 min
Dec 13, 9:06 PM CST	Mesoscale Discussion	SPC	114 min
Dec 20, 9:07 PM CST	Dense Fog Advisory	LIX	12 hr
Dec 23, 8:40 PM CST	Tornado Watch	SPC	5 hr
Dec 23, 10:51 PM CST	Mesoscale Discussion	SPC	114 min
Dec 25, 7:31 PM CST	Hard Freeze Warning	LIX	12 hr
Dec 31, 3:30 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	5
Tornado Warning	12
Tornado Watch	8
Mesoscale Discussion	37
Special Weather Statement	42
Flooding
River Flood Warning	4
Flash Flood Watch	5
Flood Watch	2
Areal Flood Advisory	2
Heat
Excessive Heat Warning	1
Heat Advisory	6
Cold
Freeze Warning	3
Hard Freeze Warning	1
Freeze Watch	1
Wind and dust
Wind Advisory	5
Fire
Red Flag Warning	1
Fog and smoke
Dense Fog Advisory	16
Tropical
Tropical Storm Warning	3
Tropical Storm Watch	4

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.