Alert archive / Tennessee / Shelby County

Weather alerts in Shelby County, Tennessee, 2018

205 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Shelby County and its neighbors

Each county as a circle sized by its count in 2018. Tap one for its archive.

Alerts: 205
Warnings: 48
Watches: 17
Advisories: 74
Busiest month: June39 alerts
Busiest day: June 21, 20189 alerts

Over time

By month

Warning verification

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

Shelby County, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	27	15	44%	29	72%	15 min
Flash flood warnings	6	1	83%	1	100%	10 min

Each office's whole area, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Memphis, TN: tornado warnings	52	7	87%	15	60%	18 min
NWS Memphis, TN: severe thunderstorm warnings	344	142	59%	379	67%	24 min
NWS Memphis, TN: flash flood warnings	64	12	81%	24	75%	110 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 8, 7:21 PM CST	Dense Fog Advisory	MEG	14 hr
Jan 9, 4:53 PM CST	Dense Fog Advisory	MEG	16 hr
Jan 10, 9:21 AM CST	Dense Fog Advisory	MEG	9 hr
Jan 10, 2:39 PM CST	Winter Storm Watch	MEG	24 hr
Jan 11, 2:17 PM CST	Winter Storm Warning	MEG	28 hr
Jan 12, 2:00 AM CST	Mesoscale Discussion	SPC	5 hr
Jan 15, 4:38 AM CST	Wind Chill Advisory	MEG	55 hr
Jan 15, 4:38 AM CST	Winter Storm Warning	MEG	30 hr
Jan 15, 4:38 AM CST	Winter Weather Advisory	MEG	34 hr
Jan 17, 3:30 PM CST	Wind Chill Advisory	MEG	18 hr
Jan 27, 7:12 PM CST	Dense Fog Advisory	MEG	10 hr
Feb 6, 5:47 PM CST	Special Weather Statement	MEG	43 min
Feb 16, 4:39 AM CST	Wind Advisory	MEG	6 hr
Feb 17, 10:30 PM CST	Dense Fog Advisory	MEG	10 hr
Feb 19, 11:44 AM CST	River Flood Advisory	MEG	3 days
Feb 19, 3:25 PM CST	Flood Watch	MEG	5 days
Feb 21, 9:38 AM CST	River Flood Warning	MEG	58 hr
Feb 22, 9:49 AM CST	River Flood Warning	MEG	3 days
Feb 22, 9:49 AM CST	River Flood Warning	MEG	24 hr
Feb 22, 11:56 AM CST	River Flood Warning	MEG	25 days
Feb 23, 11:02 AM CST	River Flood Warning	MEG	69 hr
Feb 24, 3:16 PM CST	Tornado Watch	SPC	8 hr
Feb 24, 6:13 PM CST	Flash Flood Warning	MEG	6 hr
Feb 24, 6:15 PM CST	Severe Thunderstorm Warning	MEG	45 min
Feb 24, 6:55 PM CST	Severe Thunderstorm Warning	MEG	50 min
Feb 24, 7:26 PM CST	Severe Thunderstorm Warning	MEG	34 min
Feb 26, 3:04 PM CST	Flood Watch	MEG	69 hr
Feb 28, 1:18 PM CST	River Flood Warning	MEG	55 hr
Feb 28, 1:18 PM CST	River Flood Warning	MEG	3 days
Feb 28, 1:18 PM CST	River Flood Warning	MEG	44 hr
Mar 1, 12:36 AM CST	Areal Flood Warning	MEG	9 hr
Mar 1, 1:47 AM CST	Flash Flood Warning	MEG	6 hr
Mar 1, 7:25 AM CST	Flash Flood Warning	MEG	3 hr
Mar 11, 9:16 AM CDT	Wind Advisory	MEG	16 hr
Mar 13, 2:33 PM CDT	Freeze Warning	MEG	19 hr
Mar 19, 12:10 PM CDT	River Flood Advisory	MEG	3 days
Mar 20, 11:37 AM CDT	Frost Advisory	MEG	20 hr
Mar 21, 3:37 AM CDT	Frost Advisory	MEG	29 hr
Mar 27, 2:40 AM CDT	Wind Advisory	MEG	14 hr
Mar 27, 3:23 PM CDT	Flood Watch	MEG	46 hr
Mar 29, 11:51 AM CDT	River Flood Advisory	MEG	20 days
Apr 2, 3:35 PM CDT	Wind Advisory	MEG	30 hr
Apr 3, 12:57 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 3, 1:33 PM CDT	Tornado Watch	SPC	7 hr
Apr 3, 3:34 PM CDT	Mesoscale Discussion	SPC	86 min
Apr 4, 5:23 PM CDT	Frost Advisory	MEG	15 hr
Apr 7, 3:44 AM CDT	Freeze Warning	MEG	29 hr
Apr 12, 3:46 AM CDT	Wind Advisory	MEG	16 hr
Apr 12, 2:34 PM CDT	Flash Flood Watch	MEG	48 hr
Apr 13, 7:54 AM CDT	Wind Advisory	MEG	14 hr
Apr 13, 10:12 PM CDT	Tornado Watch	SPC	10 hr
Apr 14, 2:26 AM CDT	Special Weather Statement	MEG	49 min
Apr 18, 8:52 PM CDT	River Flood Advisory	MEG	59 hr
Apr 23, 9:26 PM CDT	River Flood Advisory	MEG	4 days
Apr 25, 3:52 AM CDT	Dense Fog Advisory	MEG	5 hr
May 5, 4:13 PM CDT	Special Weather Statement	MEG	32 min
May 5, 10:05 PM CDT	Dense Fog Advisory	MEG	11 hr
May 6, 3:00 PM CDT	Mesoscale Discussion	SPC	3 hr
May 16, 2:34 PM CDT	Special Weather Statement	MEG	26 min
May 17, 3:42 PM CDT	Special Weather Statement	MEG	33 min
May 17, 4:03 PM CDT	Areal Flood Advisory	MEG	117 min
May 19, 12:39 PM CDT	Special Weather Statement	MEG	51 min
May 19, 1:07 PM CDT	Severe Thunderstorm Warning	MEG	38 min
May 19, 5:40 PM CDT	Severe Thunderstorm Warning	MEG	50 min
May 19, 6:10 PM CDT	Severe Thunderstorm Warning	MEG	50 min
May 19, 6:14 PM CDT	Mesoscale Discussion	SPC	61 min
May 20, 11:43 AM CDT	Mesoscale Discussion	SPC	3 hr
May 20, 12:32 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 20, 3:32 PM CDT	Mesoscale Discussion	SPC	118 min
May 20, 3:56 PM CDT	Severe Thunderstorm Warning	MEG	36 min
May 20, 6:26 PM CDT	Mesoscale Discussion	SPC	64 min
May 22, 3:38 PM CDT	Areal Flood Advisory	MEG	67 min
May 22, 4:02 PM CDT	Areal Flood Advisory	MEG	3 hr
May 22, 5:15 PM CDT	Areal Flood Advisory	MEG	2 hr
May 24, 1:44 PM CDT	Areal Flood Advisory	MEG	61 min
May 24, 2:04 PM CDT	Special Weather Statement	MEG	26 min
May 24, 2:12 PM CDT	Areal Flood Advisory	MEG	63 min
May 25, 3:37 PM CDT	Special Weather Statement	MEG	23 min
May 29, 5:43 PM CDT	Areal Flood Advisory	MEG	62 min
May 29, 6:23 PM CDT	Areal Flood Advisory	MEG	52 min
May 31, 7:56 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 1, 1:53 AM CDT	Special Weather Statement	MEG	52 min
Jun 1, 2:18 PM CDT	Areal Flood Advisory	MEG	117 min
Jun 2, 1:27 AM CDT	Dense Fog Advisory	MEG	8 hr
Jun 12, 8:29 PM CDT	Special Weather Statement	MEG	31 min
Jun 12, 8:47 PM CDT	Severe Thunderstorm Warning	MEG	43 min
Jun 16, 3:30 AM CDT	Heat Advisory	MEG	40 hr
Jun 21, 12:31 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 21, 1:39 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 21, 3:56 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 21, 4:24 PM CDT	Severe Thunderstorm Warning	MEG	36 min
Jun 21, 4:47 PM CDT	Special Weather Statement	MEG	43 min
Jun 21, 4:51 PM CDT	Severe Thunderstorm Warning	MEG	24 min
Jun 21, 5:12 PM CDT	Severe Thunderstorm Warning	MEG	17 min
Jun 21, 5:30 PM CDT	Special Weather Statement	MEG	30 min
Jun 21, 5:44 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 21, 8:30 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 23, 7:24 AM CDT	Severe Thunderstorm Warning	MEG	51 min
Jun 23, 7:54 AM CDT	Severe Thunderstorm Warning	MEG	51 min
Jun 23, 4:50 PM CDT	Mesoscale Discussion	SPC	115 min
Jun 24, 2:33 AM CDT	Mesoscale Discussion	SPC	87 min
Jun 24, 4:21 AM CDT	Special Weather Statement	MEG	39 min
Jun 24, 4:37 AM CDT	Severe Thunderstorm Warning	MEG	38 min
Jun 24, 5:47 AM CDT	Areal Flood Advisory	MEG	118 min
Jun 24, 6:24 AM CDT	Special Weather Statement	MEG	51 min
Jun 24, 6:57 AM CDT	Severe Thunderstorm Warning	MEG	48 min
Jun 24, 7:18 AM CDT	Flash Flood Warning	MEG	72 min
Jun 26, 12:23 PM CDT	Heat Advisory	MEG	8 hr
Jun 26, 3:35 PM CDT	Heat Advisory	MEG	5 days
Jun 26, 5:26 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 26, 7:41 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 26, 10:06 PM CDT	Mesoscale Discussion	SPC	84 min
Jun 27, 1:42 PM CDT	Mesoscale Discussion	SPC	93 min
Jun 28, 8:39 PM CDT	Mesoscale Discussion	SPC	96 min
Jun 28, 10:50 PM CDT	Special Weather Statement	MEG	55 min
Jun 28, 11:00 PM CDT	Mesoscale Discussion	SPC	90 min
Jun 28, 11:36 PM CDT	Special Weather Statement	MEG	54 min
Jun 29, 12:24 AM CDT	Special Weather Statement	MEG	51 min
Jun 30, 3:20 PM CDT	Special Weather Statement	MEG	25 min
Jul 2, 2:06 PM CDT	Special Weather Statement	MEG	39 min
Jul 2, 2:43 PM CDT	Areal Flood Advisory	MEG	62 min
Jul 4, 3:32 AM CDT	Heat Advisory	MEG	40 hr
Jul 4, 6:01 PM CDT	Severe Thunderstorm Warning	MEG	15 min
Jul 5, 8:43 PM CDT	Special Weather Statement	MEG	47 min
Jul 5, 9:09 PM CDT	Special Weather Statement	MEG	51 min
Jul 5, 9:15 PM CDT	Severe Thunderstorm Warning	MEG	30 min
Jul 5, 9:32 PM CDT	Severe Thunderstorm Warning	MEG	43 min
Jul 6, 2:23 PM CDT	Severe Thunderstorm Warning	MEG	37 min
Jul 11, 2:20 AM CDT	Heat Advisory	MEG	18 hr
Jul 12, 2:58 AM CDT	Heat Advisory	MEG	16 hr
Jul 12, 2:17 PM CDT	Areal Flood Advisory	MEG	118 min
Jul 13, 2:59 AM CDT	Heat Advisory	MEG	17 hr
Jul 14, 3:06 AM CDT	Heat Advisory	MEG	18 hr
Jul 15, 3:57 AM CDT	Heat Advisory	MEG	16 hr
Jul 15, 6:34 PM CDT	Special Weather Statement	MEG	41 min
Jul 15, 7:04 PM CDT	Areal Flood Advisory	MEG	116 min
Jul 15, 7:14 PM CDT	Special Weather Statement	MEG	46 min
Jul 15, 7:32 PM CDT	Severe Thunderstorm Warning	MEG	28 min
Jul 16, 1:43 PM CDT	Heat Advisory	MEG	6 hr
Jul 17, 3:23 AM CDT	Heat Advisory	MEG	17 hr
Jul 18, 1:32 PM CDT	Areal Flood Advisory	MEG	3 hr
Jul 19, 3:15 AM CDT	Heat Advisory	MEG	17 hr
Jul 19, 3:42 PM CDT	Heat Advisory	MEG	28 hr
Jul 19, 7:54 PM CDT	Areal Flood Advisory	MEG	82 min
Jul 19, 7:55 PM CDT	Severe Thunderstorm Warning	MEG	50 min
Jul 19, 8:35 PM CDT	Severe Thunderstorm Warning	MEG	29 min
Jul 19, 8:54 PM CDT	Severe Thunderstorm Watch	SPC	114 min
Jul 20, 3:34 AM CDT	Excessive Heat Warning	MEG	16 hr
Jul 20, 5:54 PM CDT	Mesoscale Discussion	SPC	3 hr
Jul 20, 6:22 PM CDT	Tornado Watch	SPC	8 hr
Jul 20, 10:20 PM CDT	Mesoscale Discussion	SPC	115 min
Jul 21, 1:38 AM CDT	Mesoscale Discussion	SPC	67 min
Aug 6, 3:16 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 16, 8:37 AM CDT	Special Weather Statement	MEG	38 min
Aug 16, 2:21 PM CDT	Heat Advisory	MEG	7 hr
Aug 19, 4:18 AM CDT	Dense Fog Advisory	MEG	5 hr
Aug 20, 11:05 AM CDT	Special Weather Statement	MEG	40 min
Aug 20, 11:46 AM CDT	Mesoscale Discussion	SPC	119 min
Aug 20, 4:00 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 20, 4:45 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 20, 4:57 PM CDT	Severe Thunderstorm Warning	MEG	48 min
Aug 20, 5:39 PM CDT	Severe Thunderstorm Warning	MEG	51 min
Aug 20, 5:41 PM CDT	Severe Thunderstorm Warning	MEG	49 min
Aug 20, 5:57 PM CDT	Mesoscale Discussion	SPC	63 min
Aug 20, 6:30 PM CDT	Severe Thunderstorm Warning	MEG	28 min
Aug 29, 4:37 PM CDT	Special Weather Statement	MEG	53 min
Aug 29, 5:28 PM CDT	Special Weather Statement	MEG	47 min
Aug 29, 5:50 PM CDT	Areal Flood Advisory	MEG	115 min
Aug 29, 6:41 PM CDT	Flash Flood Warning	MEG	2 hr
Aug 30, 3:16 PM CDT	Special Weather Statement	MEG	29 min
Aug 30, 3:41 PM CDT	Special Weather Statement	MEG	34 min
Aug 30, 3:52 PM CDT	Areal Flood Advisory	MEG	53 min
Aug 30, 4:10 PM CDT	Severe Thunderstorm Warning	MEG	25 min
Aug 30, 4:46 PM CDT	Special Weather Statement	MEG	44 min
Aug 30, 4:49 PM CDT	Areal Flood Advisory	MEG	64 min
Aug 30, 4:52 PM CDT	Areal Flood Advisory	MEG	53 min
Aug 30, 5:32 PM CDT	Areal Flood Advisory	MEG	118 min
Sep 8, 6:50 PM CDT	Special Weather Statement	MEG	40 min
Sep 8, 7:04 PM CDT	Areal Flood Advisory	MEG	3 hr
Sep 8, 7:25 PM CDT	Special Weather Statement	MEG	50 min
Sep 8, 7:56 PM CDT	Areal Flood Advisory	MEG	3 hr
Sep 8, 9:10 PM CDT	Special Weather Statement	MEG	65 min
Sep 8, 9:26 PM CDT	Flash Flood Warning	MEG	118 min
Sep 24, 7:12 AM CDT	Areal Flood Advisory	MEG	3 hr
Sep 29, 2:08 AM CDT	Dense Fog Advisory	MEG	8 hr
Oct 21, 3:22 AM CDT	Frost Advisory	MEG	30 hr
Oct 31, 7:04 PM CDT	Mesoscale Discussion	SPC	116 min
Nov 1, 1:41 AM CDT	Mesoscale Discussion	SPC	3 hr
Nov 1, 2:59 AM CDT	Special Weather Statement	MEG	31 min
Nov 2, 11:41 PM CDT	Dense Fog Advisory	MEG	9 hr
Nov 5, 3:38 PM CST	Mesoscale Discussion	SPC	2 hr
Nov 5, 7:04 PM CST	Tornado Watch	SPC	8 hr
Nov 6, 1:22 AM CST	Dense Fog Advisory	MEG	7 hr
Nov 8, 3:00 AM CST	Freeze Watch	MEG	12 hr
Nov 8, 3:02 PM CST	Freeze Warning	MEG	42 hr
Nov 13, 1:50 PM CST	Winter Weather Advisory	MEG	43 hr
Nov 21, 4:08 AM CST	Freezing Fog Advisory	MEG	5 hr
Dec 1, 3:25 AM CST	Mesoscale Discussion	SPC	2 hr
Dec 1, 6:17 AM CST	Special Weather Statement	MEG	28 min
Dec 7, 6:22 PM CST	Winter Weather Advisory	MEG	39 hr
Dec 11, 1:43 AM CST	Freezing Fog Advisory	MEG	10 hr
Dec 16, 2:21 PM CST	Dense Fog Advisory	MEG	22 hr
Dec 26, 10:40 AM CST	Wind Advisory	MEG	28 hr
Dec 31, 10:08 AM CST	Special Weather Statement	MEG	37 min
Dec 31, 11:12 AM CST	River Flood Advisory	MEG	31 days

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	27
Severe Thunderstorm Watch	6
Tornado Watch	5
Mesoscale Discussion	30
Special Weather Statement	36
Flooding
Areal Flood Warning	1
Flash Flood Warning	6
River Flood Warning	8
Flash Flood Watch	1
Flood Watch	3
Areal Flood Advisory	23
River Flood Advisory	6
Winter
Winter Storm Warning	2
Winter Storm Watch	1
Winter Weather Advisory	3
Heat
Excessive Heat Warning	1
Heat Advisory	14
Cold
Freeze Warning	3
Freeze Watch	1
Frost Advisory	4
Wind Chill Advisory	2
Wind and dust
Wind Advisory	7
Fog and smoke
Dense Fog Advisory	13
Freezing Fog Advisory	2

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2017 2019

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.