Alert archive / Mississippi / Clarke County

Weather alerts in Clarke County, Mississippi, 2020

119 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Clarke County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts: 119
Warnings: 40
Watches: 17
Advisories: 14
Busiest month: April30 alerts
Busiest day: April 23, 20209 alerts

Over time

By month

Warning verification

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

3 of 5 tornado warnings covering Clarke County in 2020 had a tornado report inside them; 12 of 14 tornado reports fell inside a warning, on average 30 minutes after it went out.

Clarke County, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	5	3	40%	14	86%	30 min
Severe thunderstorm warnings	17	11	35%	42	79%	31 min
Flash flood warnings	5	3	40%	2	50%	112 min

Each office's whole area, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Jackson, MS: tornado warnings	60	37	38%	149	85%	26 min
NWS Jackson, MS: severe thunderstorm warnings	423	268	37%	898	83%	26 min
NWS Jackson, MS: flash flood warnings	108	73	32%	276	85%	87 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 1, 8:00 PM CST	River Flood Warning	JAN	5 days
Jan 9, 2:27 PM CST	Wind Advisory	JAN	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	JAN	54 min
Jan 13, 2:36 PM CST	Dense Fog Advisory	JAN	18 hr
Jan 14, 4:37 PM CST	River Flood Warning	JAN	4 days
Jan 14, 10:40 PM CST	Areal Flood Warning	JAN	9 hr
Jan 15, 1:56 PM CST	River Flood Warning	JAN	4 days
Jan 28, 12:33 AM CST	Dense Fog Advisory	JAN	10 hr
Jan 30, 4:11 AM CST	Dense Fog Advisory	JAN	5 hr
Feb 5, 11:49 AM CST	Tornado Watch	SPC	6 hr
Feb 5, 5:06 PM CST	Mesoscale Discussion	SPC	84 min
Feb 5, 5:50 PM CST	Tornado Watch	SPC	6 hr
Feb 5, 9:43 PM CST	Mesoscale Discussion	SPC	2 hr
Feb 5, 10:56 PM CST	Tornado Warning	JAN	55 min
Feb 5, 11:15 PM CST	Mesoscale Discussion	SPC	2 hr
Feb 5, 11:48 PM CST	Tornado Watch	SPC	8 hr
Feb 6, 12:47 AM CST	Severe Thunderstorm Warning	JAN	58 min
Feb 6, 2:11 AM CST	Flash Flood Warning	JAN	78 min
Feb 6, 4:43 AM CST	Special Weather Statement	JAN	32 min
Feb 6, 10:10 AM CST	River Flood Warning	JAN	8 days
Feb 19, 2:59 PM CST	Flash Flood Watch	JAN	18 hr
Feb 20, 8:29 AM CST	River Flood Warning	JAN	3 days
Mar 3, 10:07 AM CST	River Flood Warning	JAN	5 days
Mar 3, 2:38 PM CST	Flash Flood Watch	JAN	39 hr
Mar 4, 1:19 AM CST	Mesoscale Discussion	SPC	2 hr
Mar 4, 1:53 AM CST	Tornado Watch	SPC	8 hr
Mar 5, 1:58 PM CST	River Flood Warning	JAN	43 hr
Mar 31, 7:03 AM CDT	Severe Thunderstorm Warning	JAN	42 min
Mar 31, 7:53 AM CDT	Mesoscale Discussion	SPC	2 hr
Apr 8, 12:13 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 8, 2:40 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 8, 3:50 PM CDT	Severe Thunderstorm Warning	JAN	40 min
Apr 11, 3:44 PM CDT	Wind Advisory	JAN	30 hr
Apr 12, 10:24 AM CDT	Mesoscale Discussion	SPC	96 min
Apr 12, 10:41 AM CDT	Tornado Watch PDS	SPC	10 hr
Apr 12, 4:54 PM CDT	Mesoscale Discussion	SPC	66 min
Apr 12, 5:06 PM CDT	Tornado Warning EmergencyTornado observedCatastrophic damage threat	JAN	31 min
Apr 12, 5:44 PM CDT	Tornado Warning	JAN	35 min
Apr 12, 7:36 PM CDT	Mesoscale Discussion	SPC	84 min
Apr 18, 4:31 AM CDT	Flash Flood Watch	JAN	41 hr
Apr 18, 10:55 AM CDT	River Flood Warning	JAN	6 days
Apr 19, 11:06 AM CDT	Mesoscale Discussion	SPC	54 min
Apr 19, 11:45 AM CDT	Tornado Watch	SPC	9 hr
Apr 19, 3:04 PM CDT	Special Weather Statement	JAN	26 min
Apr 19, 3:07 PM CDT	Mesoscale Discussion	SPC	113 min
Apr 19, 3:28 PM CDT	Special Weather Statement	JAN	32 min
Apr 19, 3:36 PM CDT	Severe Thunderstorm Warning	JAN	39 min
Apr 19, 4:00 PM CDT	Tornado Warning	JAN	30 min
Apr 19, 4:39 PM CDT	Severe Thunderstorm Warning	JAN	66 min
Apr 21, 2:16 PM CDT	Flash Flood Watch	JAN	44 hr
Apr 22, 9:47 PM CDT	Tornado Watch	SPC	9 hr
Apr 23, 1:25 AM CDT	Severe Thunderstorm Warning	JAN	36 min
Apr 23, 2:28 AM CDT	Mesoscale Discussion	SPC	92 min
Apr 23, 3:09 AM CDT	Severe Thunderstorm Warning	JAN	40 min
Apr 23, 3:28 AM CDT	Flash Flood Warning	JAN	3 hr
Apr 23, 4:21 AM CDT	Tornado Warning	JAN	39 min
Apr 23, 1:37 PM CDT	Mesoscale Discussion	SPC	113 min
Apr 23, 3:32 PM CDT	Severe Thunderstorm Warning	JAN	28 min
Apr 23, 4:06 PM CDT	Special Weather Statement	JAN	24 min
May 6, 4:50 AM CDT	Wind Advisory	JAN	14 hr
May 6, 10:26 AM CDT	Red Flag Warning	JAN	9 hr
May 17, 12:54 PM CDT	Mesoscale Discussion	SPC	2 hr
May 17, 2:24 PM CDT	Special Weather Statement	JAN	36 min
May 17, 4:41 PM CDT	Special Weather Statement	JAN	34 min
May 24, 6:19 PM CDT	Special Weather Statement	JAN	41 min
May 25, 3:56 PM CDT	Special Weather Statement	JAN	34 min
May 25, 4:30 PM CDT	Special Weather Statement	JAN	30 min
May 25, 4:43 PM CDT	Severe Thunderstorm Warning	JAN	33 min
May 26, 6:12 PM CDT	Severe Thunderstorm Warning	JAN	48 min
May 27, 12:16 PM CDT	Mesoscale Discussion	SPC	89 min
May 27, 2:36 PM CDT	Mesoscale Discussion	SPC	84 min
May 27, 6:35 PM CDT	Special Weather Statement	JAN	25 min
Jun 5, 2:49 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 5, 6:43 PM CDT	Severe Thunderstorm Warning	JAN	77 min
Jun 6, 4:24 PM CDT	Flash Flood Watch	JAN	57 hr
Jun 7, 11:26 AM CDT	Wind Advisory	JAN	22 hr
Jun 8, 11:01 AM CDT	River Flood Warning	JAN	23 hr
Jun 9, 2:45 PM CDT	Special Weather Statement	JAN	30 min
Jun 9, 6:21 PM CDT	Special Weather Statement	JAN	24 min
Jun 23, 8:08 PM CDT	Special Weather Statement	JAN	52 min
Jun 24, 1:34 PM CDT	Special Weather Statement	JAN	41 min
Jun 25, 6:09 PM CDT	Severe Thunderstorm Warning	JAN	81 min
Jun 25, 6:45 PM CDT	Mesoscale Discussion	SPC	90 min
Jul 1, 1:06 PM CDT	Special Weather Statement	JAN	39 min
Jul 12, 5:09 PM CDT	Special Weather Statement	JAN	51 min
Jul 12, 5:14 PM CDT	Severe Thunderstorm Warning	JAN	46 min
Jul 12, 6:32 PM CDT	Special Weather Statement	JAN	58 min
Jul 14, 2:22 PM CDT	Heat Advisory	JAN	29 hr
Jul 14, 6:29 PM CDT	Special Weather Statement	JAN	31 min
Jul 15, 12:24 PM CDT	Mesoscale Discussion	SPC	96 min
Jul 15, 3:36 PM CDT	Severe Thunderstorm Warning	JAN	24 min
Jul 15, 3:56 PM CDT	Flash Flood Warning	JAN	2 hr
Jul 15, 3:59 PM CDT	Severe Thunderstorm Warning	JAN	46 min
Aug 11, 7:54 PM CDT	Special Weather Statement	JAN	36 min
Aug 11, 8:11 PM CDT	Severe Thunderstorm Warning	JAN	49 min
Aug 16, 5:05 PM CDT	Mesoscale Discussion	SPC	85 min
Aug 16, 5:29 PM CDT	Special Weather Statement	JAN	31 min
Aug 20, 4:54 PM CDT	Special Weather Statement	JAN	36 min
Aug 25, 8:38 AM CDT	Flash Flood Warning	JAN	3 hr
Aug 28, 11:14 AM CDT	Special Weather Statement	JAN	31 min
Aug 28, 11:42 AM CDT	Flash Flood Warning	JAN	6 hr
Sep 13, 2:32 AM CDT	Flash Flood Watch	JAN	66 hr
Sep 27, 4:02 AM CDT	Dense Fog Advisory	JAN	6 hr
Oct 9, 4:20 AM CDT	Wind Advisory	JAN	33 hr
Oct 10, 2:23 AM CDT	Mesoscale Discussion	SPC	2 hr
Oct 27, 4:25 AM CDT	Tropical Storm Warning	JAN	43 hr
Oct 27, 2:23 PM CDT	Flash Flood Watch	JAN	33 hr
Nov 11, 7:15 AM CST	Dense Fog Advisory	JAN	106 min
Nov 25, 8:59 AM CST	Special Weather Statement	JAN	46 min
Nov 25, 9:50 AM CST	Special Weather Statement	JAN	40 min
Nov 30, 2:07 PM CST	Freeze Warning	JAN	19 hr
Dec 10, 2:27 PM CST	Dense Fog Advisory	JAN	19 hr
Dec 12, 8:58 PM CST	Dense Fog Advisory	JAN	12 hr
Dec 13, 9:06 PM CST	Mesoscale Discussion	SPC	114 min
Dec 13, 10:52 PM CST	Special Weather Statement	JAN	53 min
Dec 20, 7:57 PM CST	Dense Fog Advisory	JAN	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	17
Tornado Warning	5
Severe Thunderstorm Watch	2
Tornado Watch	8
Mesoscale Discussion	23
Special Weather Statement	25
Flooding
Areal Flood Warning	1
Flash Flood Warning	5
River Flood Warning	9
Flash Flood Watch	7
Heat
Heat Advisory	1
Cold
Freeze Warning	1
Wind and dust
Wind Advisory	5
Fire
Red Flag Warning	1
Fog and smoke
Dense Fog Advisory	8
Tropical
Tropical Storm Warning	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 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.