Alert archive / Mississippi / Coahoma County

Weather alerts in Coahoma County, Mississippi, 2021

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

Coahoma County and its neighbors

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

Alerts: 168
Warnings: 39
Watches: 23
Advisories: 60
Busiest month: March30 alerts
Busiest day: March 28, 202112 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 4 tornado warnings covering Coahoma County in 2021 had a tornado report inside them.

Coahoma County, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	4	0	100%	0
Severe thunderstorm warnings	9	2	78%	0
Flash flood warnings	14	11	21%	1	100%	130 min

Each office's whole area, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Memphis, TN: tornado warnings	83	35	58%	62	89%	22 min
NWS Memphis, TN: severe thunderstorm warnings	223	111	50%	326	72%	22 min
NWS Memphis, TN: flash flood warnings	92	56	39%	111	86%	108 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 10, 9:06 AM CST	Winter Weather Advisory	MEG	31 hr
Jan 15, 3:40 AM CST	Wind Advisory	MEG	14 hr
Jan 24, 6:14 PM CST	Dense Fog Advisory	MEG	12 hr
Jan 30, 2:46 PM CST	Wind Advisory	MEG	8 hr
Feb 9, 4:01 AM CST	Winter Storm Watch	MEG	33 hr
Feb 9, 2:54 PM CST	Ice Storm Warning	MEG	45 hr
Feb 11, 4:02 AM CST	Mesoscale Discussion	SPC	5 hr
Feb 12, 12:40 AM CST	Winter Weather Advisory	MEG	5 hr
Feb 12, 3:17 PM CST	Winter Storm Watch	MEG	24 hr
Feb 13, 2:53 PM CST	Winter Storm Warning	MEG	54 hr
Feb 15, 5:57 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 15, 3:02 PM CST	Wind Chill Advisory	MEG	21 hr
Feb 15, 8:48 PM CST	Winter Storm Watch	MEG	19 hr
Feb 16, 4:15 AM CST	Winter Storm Warning	MEG	53 hr
Feb 17, 9:15 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 17, 3:22 PM CST	Mesoscale Discussion	SPC	4 hr
Feb 18, 9:07 AM CST	Winter Weather Advisory	MEG	6 hr
Feb 27, 2:55 AM CST	Flood Watch	MEG	56 hr
Feb 27, 9:03 PM CST	Dense Fog Advisory	MEG	7 hr
Feb 28, 1:01 PM CST	Mesoscale Discussion	SPC	119 min
Feb 28, 2:22 PM CST	Tornado Watch	SPC	8 hr
Feb 28, 4:40 PM CST	Mesoscale Discussion	SPC	95 min
Feb 28, 6:27 PM CST	Mesoscale Discussion	SPC	93 min
Mar 1, 3:32 AM CST	Areal Flood Advisory	MEG	3 hr
Mar 3, 3:19 AM CST	Freezing Fog Advisory	MEG	6 hr
Mar 17, 5:34 AM CDT	Mesoscale Discussion	SPC	86 min
Mar 17, 5:53 AM CDT	Tornado Watch	SPC	7 hr
Mar 17, 6:35 AM CDT	Severe Thunderstorm Warning	MEG	40 min
Mar 17, 7:38 AM CDT	Mesoscale Discussion	SPC	67 min
Mar 17, 12:15 PM CDT	Mesoscale Discussion	SPC	90 min
Mar 17, 12:57 PM CDT	Tornado Watch PDS	SPC	6 hr
Mar 17, 6:09 PM CDT	Mesoscale Discussion	SPC	66 min
Mar 22, 8:52 PM CDT	Wind Advisory	MEG	19 hr
Mar 27, 2:05 AM CDT	Mesoscale Discussion	SPC	115 min
Mar 27, 1:51 PM CDT	Tornado Watch	SPC	7 hr
Mar 27, 8:42 PM CDT	Mesoscale Discussion	SPC	93 min
Mar 27, 9:01 PM CDT	Tornado Watch	SPC	7 hr
Mar 27, 9:12 PM CDT	Severe Thunderstorm Warning	MEG	48 min
Mar 27, 9:35 PM CDT	Tornado Warning	MEG	40 min
Mar 27, 9:37 PM CDT	Tornado Warning	MEG	53 min
Mar 27, 9:49 PM CDT	Tornado Warning	MEG	31 min
Mar 27, 10:05 PM CDT	Tornado Warning	MEG	40 min
Mar 27, 10:08 PM CDT	Severe Thunderstorm Warning	MEG	52 min
Mar 27, 10:45 PM CDT	Mesoscale Discussion	SPC	90 min
Mar 27, 11:23 PM CDT	Flash Flood Warning	MEG	4 hr
Mar 27, 11:41 PM CDT	Severe Thunderstorm Warning	MEG	49 min
Mar 28, 11:45 AM CDT	River Flood Advisory	MEG	24 hr
Mar 31, 3:12 AM CDT	Special Weather Statement	JAN	18 min
Mar 31, 3:16 AM CDT	Special Weather Statement	MEG	29 min
Mar 31, 5:31 AM CDT	Freeze Watch	MEG	9 hr
Mar 31, 2:34 PM CDT	Frost Advisory	MEG	18 hr
Mar 31, 2:34 PM CDT	Freeze Warning	MEG	42 hr
Apr 1, 11:37 AM CDT	River Flood Advisory	MEG	10 days
Apr 3, 1:24 AM CDT	Frost Advisory	MEG	8 hr
Apr 7, 11:20 AM CDT	Wind Advisory	MEG	8 hr
Apr 7, 5:12 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 7, 7:59 PM CDT	Special Weather Statement	MEG	31 min
Apr 7, 8:21 PM CDT	Areal Flood Advisory	MEG	91 min
Apr 9, 1:25 PM CDT	Mesoscale Discussion	SPC	95 min
Apr 9, 3:10 PM CDT	Mesoscale Discussion	SPC	95 min
Apr 9, 3:42 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 9, 4:12 PM CDT	Special Weather Statement	MEG	33 min
Apr 9, 5:26 PM CDT	Severe Thunderstorm Warning	MEG	49 min
Apr 9, 5:50 PM CDT	Severe Thunderstorm Warning	MEG	40 min
Apr 9, 6:31 PM CDT	Special Weather Statement	MEG	29 min
Apr 25, 3:00 AM CDT	Dense Fog Advisory	MEG	6 hr
May 2, 4:46 PM CDT	Tornado Watch	SPC	5 hr
May 2, 11:45 PM CDT	Mesoscale Discussion	SPC	2 hr
May 4, 11:58 AM CDT	Mesoscale Discussion	SPC	2 hr
May 4, 12:18 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 8, 3:13 PM CDT	Wind Advisory	MEG	26 hr
May 9, 12:14 PM CDT	Mesoscale Discussion	SPC	91 min
May 9, 2:27 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 9, 3:42 PM CDT	Mesoscale Discussion	SPC	93 min
May 9, 5:41 PM CDT	Mesoscale Discussion	SPC	2 hr
May 9, 5:48 PM CDT	Mesoscale Discussion	SPC	87 min
May 9, 7:21 PM CDT	Special Weather Statement	MEG	24 min
May 9, 7:45 PM CDT	Areal Flood Advisory	MEG	2 hr
Jun 7, 6:26 PM CDT	Severe Thunderstorm Warning	MEG	49 min
Jun 7, 7:09 PM CDT	Severe Thunderstorm Warning	MEG	21 min
Jun 7, 7:16 PM CDT	Mesoscale Discussion	SPC	59 min
Jun 8, 4:25 AM CDT	Flash Flood Watch	MEG	4 days
Jun 8, 5:24 AM CDT	Flash Flood Warning	MEG	5 hr
Jun 8, 7:47 AM CDT	Areal Flood Advisory	MEG	3 hr
Jun 8, 9:59 AM CDT	Flash Flood Warning Considerable damage threat	MEG	4 hr
Jun 8, 10:33 AM CDT	Areal Flood Advisory	MEG	3 hr
Jun 8, 12:19 PM CDT	Flash Flood Warning EmergencyCatastrophic damage threat	MEG	4 hr
Jun 8, 12:42 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 8, 1:45 PM CDT	Flash Flood Warning	MEG	4 hr
Jun 8, 1:53 PM CDT	Flash Flood Warning Considerable damage threat	MEG	4 hr
Jun 8, 5:56 PM CDT	Areal Flood Warning	MEG	5 hr
Jun 8, 10:58 PM CDT	Flash Flood Warning	MEG	11 hr
Jun 9, 5:11 AM CDT	Areal Flood Warning	MEG	99 min
Jun 9, 9:21 AM CDT	Flash Flood Warning	MEG	3 hr
Jun 9, 12:12 PM CDT	Flash Flood Warning Considerable damage threat	MEG	3 hr
Jun 9, 3:10 PM CDT	Areal Flood Advisory	MEG	3 hr
Jun 10, 1:15 AM CDT	Areal Flood Advisory	MEG	55 min
Jun 10, 2:10 AM CDT	Flash Flood Warning Emergency	MEG	7 hr
Jun 10, 2:57 AM CDT	Areal Flood Advisory	MEG	29 min
Jun 10, 3:26 AM CDT	Flash Flood Warning	MEG	5 hr
Jun 10, 4:39 AM CDT	Areal Flood Advisory	MEG	2 hr
Jun 10, 7:21 AM CDT	Areal Flood Advisory	MEG	54 min
Jun 10, 8:24 AM CDT	Flash Flood Warning	MEG	4 hr
Jun 10, 11:44 AM CDT	Flash Flood Warning Considerable damage threat	MEG	11 hr
Jun 21, 2:57 PM CDT	Areal Flood Advisory	MEG	3 hr
Jul 17, 7:23 AM CDT	Areal Flood Advisory	MEG	112 min
Jul 17, 9:20 AM CDT	Areal Flood Advisory	MEG	115 min
Jul 18, 12:16 PM CDT	Special Weather Statement	MEG	29 min
Jul 24, 4:13 AM CDT	Heat Advisory	MEG	15 hr
Jul 24, 2:24 PM CDT	Heat Advisory	MEG	29 hr
Jul 25, 1:58 PM CDT	Heat Advisory	MEG	29 hr
Jul 26, 2:36 PM CDT	Heat Advisory	MEG	28 hr
Jul 27, 2:49 PM CDT	Heat Advisory	MEG	28 hr
Jul 28, 2:38 PM CDT	Heat Advisory	MEG	29 hr
Jul 29, 10:17 AM CDT	Excessive Heat Warning	MEG	10 hr
Jul 29, 2:51 PM CDT	Excessive Heat Warning	MEG	29 hr
Jul 30, 2:41 AM CDT	Heat Advisory	MEG	41 hr
Jul 31, 9:48 AM CDT	Excessive Heat Warning	MEG	10 hr
Jul 31, 3:10 PM CDT	Heat Advisory	MEG	27 hr
Aug 8, 2:21 PM CDT	Heat Advisory	MEG	4 days
Aug 13, 5:08 PM CDT	Flash Flood Warning	MEG	3 hr
Aug 21, 3:30 AM CDT	Heat Advisory	MEG	16 hr
Aug 21, 3:01 PM CDT	Heat Advisory	MEG	29 hr
Aug 22, 3:08 PM CDT	Excessive Heat Warning	MEG	29 hr
Aug 23, 3:09 AM CDT	Excessive Heat Warning	MEG	41 hr
Aug 24, 3:07 PM CDT	Heat Advisory	MEG	29 hr
Aug 26, 4:15 AM CDT	Heat Advisory	MEG	16 hr
Aug 28, 2:42 PM CDT	Flash Flood Watch	MEG	66 hr
Aug 29, 2:32 PM CDT	Wind Advisory	MEG	36 hr
Sep 18, 6:24 AM CDT	Flash Flood Watch	MEG	56 hr
Sep 18, 11:46 AM CDT	Areal Flood Advisory	MEG	2 hr
Sep 19, 6:06 AM CDT	Areal Flood Advisory	MEG	4 hr
Sep 21, 11:51 AM CDT	Mesoscale Discussion	SPC	2 hr
Sep 21, 2:47 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 21, 3:38 PM CDT	Areal Flood Advisory	MEG	3 hr
Oct 2, 8:19 AM CDT	Areal Flood Advisory	MEG	3 hr
Oct 5, 12:45 PM CDT	Mesoscale Discussion	SPC	2 hr
Oct 5, 4:17 PM CDT	Special Weather Statement	MEG	58 min
Oct 5, 4:20 PM CDT	Severe Thunderstorm Warning	MEG	25 min
Oct 6, 10:39 PM CDT	Dense Fog Advisory	MEG	10 hr
Oct 15, 11:14 AM CDT	Mesoscale Discussion	SPC	3 hr
Oct 15, 6:05 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Nov 3, 3:26 AM CDT	Frost Advisory	MEG	30 hr
Nov 3, 3:26 AM CDT	Freeze Watch	MEG	24 hr
Nov 4, 3:14 AM CDT	Freeze Warning	MEG	30 hr
Nov 7, 2:23 AM CST	Dense Fog Advisory	MEG	5 hr
Nov 10, 6:12 AM CST	Dense Fog Advisory	MEG	2 hr
Nov 12, 3:57 AM CST	Frost Advisory	MEG	24 hr
Nov 21, 4:28 PM CST	Special Weather Statement	MEG	32 min
Dec 2, 3:02 AM CST	Dense Fog Advisory	MEG	6 hr
Dec 4, 10:00 PM CST	Dense Fog Advisory	MEG	11 hr
Dec 6, 5:06 AM CST	Mesoscale Discussion	SPC	114 min
Dec 10, 1:35 AM CST	Dense Fog Advisory	MEG	7 hr
Dec 10, 3:07 PM CST	Tornado Watch	SPC	11 hr
Dec 10, 4:45 PM CST	Mesoscale Discussion	SPC	90 min
Dec 10, 9:40 PM CST	Mesoscale Discussion	SPC	2 hr
Dec 10, 10:09 PM CST	Mesoscale Discussion	SPC	96 min
Dec 10, 10:44 PM CST	Tornado Watch	SPC	6 hr
Dec 11, 2:00 AM CST	Mesoscale Discussion	SPC	90 min
Dec 16, 2:08 PM CST	Mesoscale Discussion	SPC	3 hr
Dec 24, 8:25 AM CST	Wind Advisory	MEG	22 hr
Dec 25, 9:40 PM CST	Dense Fog Advisory	MEG	14 hr
Dec 29, 10:44 AM CST	Mesoscale Discussion	SPC	2 hr
Dec 29, 12:05 PM CST	Tornado Watch	SPC	7 hr
Dec 29, 1:18 PM CST	Mesoscale Discussion	SPC	87 min
Dec 29, 3:41 PM CST	Mesoscale Discussion	SPC	64 min
Dec 29, 9:47 PM CST	Dense Fog Advisory	MEG	14 hr
Dec 30, 7:57 PM CST	Dense Fog Advisory	MEG	13 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	9
Tornado Warning	4
Severe Thunderstorm Watch	5
Tornado Watch	9
Mesoscale Discussion	37
Special Weather Statement	9
Flooding
Areal Flood Warning	2
Flash Flood Warning	14
Flash Flood Watch	3
Flood Watch	1
Areal Flood Advisory	17
River Flood Advisory	2
Winter
Ice Storm Warning	1
Winter Storm Warning	2
Winter Storm Watch	3
Winter Weather Advisory	3
Heat
Excessive Heat Warning	5
Heat Advisory	13
Cold
Freeze Warning	2
Freeze Watch	2
Frost Advisory	4
Wind Chill Advisory	1
Wind and dust
Wind Advisory	7
Fog and smoke
Dense Fog Advisory	12
Freezing Fog Advisory	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.