Alert archive / Mississippi / Alcorn County

Weather alerts in Alcorn County, Mississippi, 2010

193 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Alcorn County and its neighbors

Each county as a circle sized by its count in 2010. Tap one for its archive.

Alerts: 193
Warnings: 57
Watches: 46
Advisories: 53
Busiest month: May42 alerts
Busiest day: April 24, 201019 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 Alcorn County in 2010 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 29 minutes after it went out.

Alcorn County, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	12	4	67%	1	100%	29 min
Severe thunderstorm warnings	16	9	44%	3	100%	10 min
Flash flood warnings	18	10	44%	8	100%	170 min

Each office's whole area, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Memphis, TN: tornado warnings	109	28	74%	51	86%	18 min
NWS Memphis, TN: severe thunderstorm warnings	436	188	57%	371	73%	22 min
NWS Memphis, TN: flash flood warnings	283	118	58%	247	93%	150 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 6, 4:12 AM CST	Winter Weather Advisory	MEG	32 hr
Jan 7, 12:44 AM CST	Mesoscale Discussion	SPC	6 hr
Jan 7, 7:33 AM CST	Wind Chill Advisory	MEG	44 hr
Jan 17, 10:37 PM CST	Dense Fog Advisory	MEG	11 hr
Jan 20, 4:15 AM CST	Flash Flood Watch	MEG	24 hr
Jan 21, 9:55 AM CST	Mesoscale Discussion	SPC	65 min
Jan 21, 12:01 PM CST	Tornado Watch	SPC	3 hr
Jan 22, 3:38 PM CST	Wind Advisory	MEG	35 hr
Jan 25, 3:58 AM CST	Wind Advisory	MEG	12 hr
Jan 26, 3:33 PM CST	Winter Storm Watch	MEG	53 hr
Jan 28, 3:41 AM CST	Winter Storm Warning	MEG	50 hr
Jan 29, 10:45 AM CST	Mesoscale Discussion	SPC	4 hr
Jan 30, 8:07 PM CST	Freezing Fog Advisory	MEG	12 hr
Feb 7, 9:17 PM CST	Winter Storm Warning	MEG	35 hr
Feb 8, 4:25 AM CST	Winter Weather Advisory	MEG	28 hr
Feb 13, 3:30 PM CST	Winter Storm Watch	MEG	6 hr
Feb 13, 9:46 PM CST	Winter Weather Advisory	MEG	28 hr
Feb 15, 9:13 AM CST	Winter Weather Advisory	MEG	9 hr
Mar 11, 1:21 AM CST	Mesoscale Discussion	SPC	54 min
Mar 11, 1:42 AM CST	Tornado Watch	SPC	4 hr
Mar 11, 2:16 AM CST	Severe Thunderstorm Warning	MEG	48 min
Mar 22, 11:20 PM CDT	Dense Fog Advisory	MEG	11 hr
Mar 25, 1:14 PM CDT	Mesoscale Discussion	SPC	61 min
Mar 25, 1:49 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Mar 25, 3:44 PM CDT	Severe Thunderstorm Warning	MEG	46 min
Mar 25, 4:50 PM CDT	Mesoscale Discussion	SPC	85 min
Apr 3, 2:59 AM CDT	Mesoscale Discussion	SPC	91 min
Apr 3, 4:13 AM CDT	Severe Thunderstorm Warning	MEG	62 min
Apr 7, 7:31 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 7, 10:16 PM CDT	Mesoscale Discussion	SPC	119 min
Apr 8, 3:02 PM CDT	Frost Advisory	MEG	17 hr
Apr 9, 8:23 PM CDT	Frost Advisory	MEG	12 hr
Apr 22, 3:31 PM CDT	Flash Flood Watch	MEG	48 hr
Apr 23, 4:13 AM CDT	Wind Advisory	MEG	41 hr
Apr 23, 6:31 PM CDT	Mesoscale Discussion	SPC	29 min
Apr 23, 6:51 PM CDT	Tornado Watch	SPC	8 hr
Apr 23, 11:40 PM CDT	Mesoscale Discussion	SPC	65 min
Apr 24, 6:00 AM CDT	Tornado Watch PDS	SPC	6 hr
Apr 24, 7:49 AM CDT	Severe Thunderstorm Warning	MEG	41 min
Apr 24, 8:18 AM CDT	Severe Thunderstorm Warning	MEG	42 min
Apr 24, 8:58 AM CDT	Severe Thunderstorm Warning	MEG	47 min
Apr 24, 9:20 AM CDT	Flash Flood Warning	MEG	2 hr
Apr 24, 9:31 AM CDT	Mesoscale Discussion	SPC	59 min
Apr 24, 9:44 AM CDT	Severe Thunderstorm Warning	MEG	61 min
Apr 24, 10:19 AM CDT	Tornado Warning	MEG	41 min
Apr 24, 10:44 AM CDT	Severe Thunderstorm Warning	MEG	61 min
Apr 24, 10:46 AM CDT	Flash Flood Warning	MEG	108 min
Apr 24, 10:51 AM CDT	Tornado Warning	MEG	39 min
Apr 24, 11:11 AM CDT	Tornado Warning	MEG	49 min
Apr 24, 11:31 AM CDT	Tornado Watch PDS	SPC	8 hr
Apr 24, 11:32 AM CDT	Tornado Warning	MEG	58 min
Apr 24, 12:45 PM CDT	Tornado Warning	MEG	40 min
Apr 24, 12:56 PM CDT	Tornado Warning	MEG	28 min
Apr 24, 2:01 PM CDT	Mesoscale Discussion	SPC	89 min
Apr 24, 2:43 PM CDT	Severe Thunderstorm Warning	MEG	62 min
Apr 29, 4:15 AM CDT	Flash Flood Watch	MEG	4 days
Apr 30, 8:51 PM CDT	Severe Thunderstorm Warning	MEG	29 min
Apr 30, 11:41 PM CDT	Mesoscale Discussion	SPC	64 min
May 1, 12:01 AM CDT	Tornado Watch	SPC	3 hr
May 1, 2:25 AM CDT	Mesoscale Discussion	SPC	95 min
May 1, 3:11 AM CDT	Tornado Watch	SPC	8 hr
May 1, 6:17 AM CDT	Mesoscale Discussion	SPC	88 min
May 1, 7:48 AM CDT	Mesoscale Discussion	SPC	57 min
May 1, 9:52 AM CDT	Tornado Watch	SPC	8 hr
May 1, 12:50 PM CDT	Flash Flood Warning	MEG	5 hr
May 1, 1:46 PM CDT	Tornado Warning	MEG	44 min
May 1, 2:09 PM CDT	Tornado Warning	MEG	36 min
May 1, 2:27 PM CDT	Tornado Warning	MEG	48 min
May 1, 2:54 PM CDT	Mesoscale Discussion	SPC	66 min
May 1, 5:04 PM CDT	Mesoscale Discussion	SPC	56 min
May 1, 7:30 PM CDT	Mesoscale Discussion	SPC	30 min
May 1, 8:06 PM CDT	Tornado Watch PDS	SPC	8 hr
May 1, 11:38 PM CDT	Mesoscale Discussion	SPC	67 min
May 2, 2:33 AM CDT	Mesoscale Discussion	SPC	87 min
May 2, 3:01 AM CDT	Tornado Warning	MEG	51 min
May 2, 3:36 AM CDT	Tornado Watch PDS	SPC	8 hr
May 2, 5:26 AM CDT	Flash Flood Warning	MEG	12 hr
May 2, 6:37 AM CDT	Mesoscale Discussion	SPC	113 min
May 2, 11:15 AM CDT	Mesoscale Discussion	SPC	60 min
May 2, 2:04 PM CDT	Areal Flood Warning	MEG	12 hr
May 3, 1:32 AM CDT	Dense Fog Advisory	MEG	6 hr
May 7, 4:00 AM CDT	Wind Advisory	MEG	12 hr
May 15, 6:15 PM CDT	Flash Flood Watch	MEG	29 hr
May 16, 5:05 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
May 16, 8:58 PM CDT	Flash Flood Warning	MEG	3 hr
May 17, 2:48 AM CDT	Dense Fog Advisory	MEG	6 hr
May 17, 5:05 PM CDT	Mesoscale Discussion	SPC	85 min
May 18, 3:52 PM CDT	Flash Flood Watch	MEG	51 hr
May 20, 12:16 PM CDT	Mesoscale Discussion	SPC	59 min
May 20, 12:44 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
May 20, 2:11 PM CDT	Flash Flood Warning	MEG	3 hr
May 22, 5:22 AM CDT	Dense Fog Advisory	MEG	4 hr
May 24, 4:32 PM CDT	Severe Thunderstorm Warning	MEG	28 min
May 24, 4:35 PM CDT	Flash Flood Warning	MEG	3 hr
May 25, 7:44 AM CDT	Flash Flood Watch	MEG	7 hr
May 27, 6:10 PM CDT	Flash Flood Warning	MEG	3 hr
May 28, 8:42 PM CDT	Severe Thunderstorm Warning	MEG	48 min
May 30, 1:03 PM CDT	Flash Flood Warning	MEG	2 hr
Jun 9, 6:44 AM CDT	Flash Flood Warning	MEG	2 hr
Jun 9, 3:17 PM CDT	Severe Thunderstorm Warning	MEG	30 min
Jun 10, 5:58 PM CDT	Flash Flood Warning	MEG	78 min
Jun 10, 6:19 PM CDT	Severe Thunderstorm Warning	MEG	41 min
Jun 11, 2:56 PM CDT	Heat Advisory	MEG	3 days
Jun 15, 12:11 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 18, 3:30 AM CDT	Heat Advisory	MEG	7 days
Jun 26, 3:55 PM CDT	Flash Flood Warning	MEG	2 hr
Jun 26, 4:24 PM CDT	Flash Flood Warning	MEG	92 min
Jun 26, 4:40 PM CDT	Flash Flood Warning	MEG	74 min
Jun 28, 2:48 AM CDT	Heat Advisory	MEG	16 hr
Jun 28, 7:19 PM CDT	Flash Flood Warning	MEG	3 hr
Jul 8, 8:26 AM CDT	Heat Advisory	MEG	9 hr
Jul 12, 4:21 AM CDT	Flash Flood Watch	MEG	30 hr
Jul 12, 2:48 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 13, 3:50 AM CDT	Heat Advisory	MEG	65 hr
Jul 16, 4:09 AM CDT	Heat Advisory	MEG	11 hr
Jul 16, 12:06 PM CDT	Flash Flood Warning	MEG	3 hr
Jul 16, 1:35 PM CDT	Flash Flood Warning	MEG	3 hr
Jul 19, 4:00 AM CDT	Heat Advisory	MEG	11 hr
Jul 20, 3:03 PM CDT	Heat Advisory	MEG	29 hr
Jul 21, 3:38 PM CDT	Heat Advisory	MEG	3 days
Jul 25, 11:48 AM CDT	Heat Advisory	MEG	8 hr
Jul 26, 12:12 PM CDT	Heat Advisory	MEG	8 hr
Jul 29, 5:19 PM CDT	Severe Thunderstorm Warning	MEG	23 min
Jul 30, 3:51 AM CDT	Heat Advisory	MEG	16 hr
Jul 31, 3:36 AM CDT	Heat Advisory	MEG	72 hr
Aug 1, 4:39 AM CDT	Excessive Heat Warning	MEG	5 days
Aug 1, 3:46 PM CDT	Excessive Heat Watch	MEG	24 hr
Aug 3, 3:24 AM CDT	Excessive Heat Watch	MEG	12 hr
Aug 5, 9:10 PM CDT	Heat Advisory	MEG	18 hr
Aug 6, 3:02 PM CDT	Heat Advisory	MEG	4 days
Aug 7, 3:30 PM CDT	Excessive Heat Watch	MEG	36 hr
Aug 8, 3:30 PM CDT	Excessive Heat Warning	MEG	7 days
Aug 9, 2:07 PM CDT	Excessive Heat Watch	MEG	14 hr
Aug 10, 2:26 PM CDT	Excessive Heat Watch	MEG	13 hr
Aug 11, 3:57 PM CDT	Excessive Heat Watch	MEG	12 hr
Aug 15, 4:14 AM CDT	Heat Advisory	MEG	39 hr
Aug 15, 1:14 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 15, 4:42 PM CDT	Severe Thunderstorm Warning	MEG	48 min
Aug 18, 3:54 AM CDT	Flash Flood Watch	MEG	15 hr
Aug 18, 11:27 AM CDT	Flash Flood Warning	MEG	7 hr
Aug 19, 7:37 AM CDT	Dense Fog Advisory	MEG	2 hr
Aug 19, 4:07 PM CDT	Excessive Heat Watch	MEG	24 hr
Aug 19, 4:07 PM CDT	Heat Advisory	MEG	42 hr
Aug 20, 4:04 AM CDT	Excessive Heat Warning	MEG	40 hr
Aug 20, 3:59 PM CDT	Excessive Heat Watch	MEG	24 hr
Aug 21, 12:54 PM CDT	Mesoscale Discussion	SPC	96 min
Aug 21, 3:47 PM CDT	Heat Advisory	MEG	29 hr
Sep 7, 5:04 PM CDT	Areal Flood Advisory	MEG	86 min
Sep 29, 9:45 PM CDT	Fire Weather Watch	MEG	6 hr
Sep 29, 9:45 PM CDT	Fire Weather Watch	MEG	30 hr
Oct 1, 3:45 AM CDT	Red Flag Warning	MEG	15 hr
Oct 3, 3:15 AM CDT	Frost Advisory	MEG	29 hr
Oct 4, 4:10 AM CDT	Frost Advisory	MEG	28 hr
Oct 5, 2:14 AM CDT	Frost Advisory	MEG	30 hr
Oct 12, 12:48 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Oct 12, 3:28 PM CDT	Mesoscale Discussion	SPC	62 min
Oct 12, 5:24 PM CDT	Mesoscale Discussion	SPC	66 min
Oct 14, 4:33 AM CDT	Red Flag Warning	MEG	10 hr
Oct 22, 3:33 AM CDT	Fire Weather Watch	MEG	25 hr
Oct 24, 8:23 PM CDT	Mesoscale Discussion	SPC	67 min
Oct 24, 8:46 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Oct 24, 10:31 PM CDT	Areal Flood Advisory	MEG	89 min
Oct 25, 4:16 PM CDT	Wind Advisory	MEG	22 hr
Oct 26, 3:38 AM CDT	Mesoscale Discussion	SPC	2 hr
Oct 26, 4:05 AM CDT	Tornado Watch	SPC	8 hr
Oct 26, 6:00 AM CDT	Mesoscale Discussion	SPC	2 hr
Oct 26, 9:50 AM CDT	Tornado Warning	MEG	40 min
Oct 26, 10:16 AM CDT	Tornado Warning	MEG	44 min
Oct 26, 11:26 AM CDT	Mesoscale Discussion	SPC	64 min
Oct 26, 11:42 AM CDT	Tornado Watch	SPC	7 hr
Oct 28, 3:27 AM CDT	Frost Advisory	MEG	29 hr
Oct 28, 3:27 AM CDT	Freeze Watch	MEG	25 hr
Oct 29, 4:42 AM CDT	Freeze Warning	MEG	28 hr
Nov 4, 3:33 AM CDT	Freeze Watch	MEG	24 hr
Nov 5, 3:14 AM CDT	Freeze Warning	MEG	30 hr
Nov 5, 3:14 PM CDT	Freeze Watch	MEG	13 hr
Nov 6, 3:50 AM CDT	Freeze Warning	MEG	29 hr
Nov 18, 3:30 PM CST	Dense Fog Advisory	MEG	12 hr
Nov 20, 2:23 AM CST	Dense Fog Advisory	MEG	7 hr
Nov 20, 9:32 PM CST	Dense Fog Advisory	MEG	11 hr
Nov 24, 2:08 PM CST	Wind Advisory	MEG	32 hr
Nov 25, 1:40 PM CST	Severe Thunderstorm Watch	SPC	5 hr
Nov 25, 3:36 PM CST	Mesoscale Discussion	SPC	84 min
Nov 28, 2:56 PM CST	Wind Advisory	MEG	13 hr
Nov 28, 3:05 PM CST	Flash Flood Watch	MEG	37 hr
Nov 29, 10:15 PM CST	Special Weather Statement	MEG	45 min
Dec 11, 3:14 PM CST	Wind Advisory	MEG	33 hr
Dec 12, 3:59 AM CST	Wind Chill Advisory	MEG	30 hr
Dec 14, 2:44 AM CST	Winter Weather Advisory	MEG	45 hr
Dec 26, 9:06 AM CST	Winter Weather Advisory	MEG	7 hr
Dec 30, 1:10 PM CST	Wind Advisory	MEG	14 hr
Dec 31, 3:58 PM CST	Tornado Watch	SPC	7 hr
Dec 31, 5:35 PM CST	Mesoscale Discussion	SPC	115 min

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	16
Tornado Warning	12
Severe Thunderstorm Watch	8
Tornado Watch	13
Mesoscale Discussion	36
Special Weather Statement	1
Flooding
Areal Flood Warning	1
Flash Flood Warning	18
Flash Flood Watch	9
Areal Flood Advisory	2
Winter
Winter Storm Warning	2
Winter Storm Watch	2
Winter Weather Advisory	6
Heat
Excessive Heat Warning	3
Excessive Heat Watch	8
Heat Advisory	18
Cold
Freeze Warning	3
Freeze Watch	3
Frost Advisory	6
Wind Chill Advisory	2
Wind and dust
Wind Advisory	9
Fire
Red Flag Warning	2
Fire Weather Watch	3
Fog and smoke
Dense Fog Advisory	9
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 2009 2011

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.