Alert archive / Tennessee / Decatur County

Weather alerts in Decatur County, Tennessee, 2018

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

Decatur County and its neighbors

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

Alerts: 166
Warnings: 35
Watches: 22
Advisories: 70
Busiest month: June29 alerts
Busiest day: June 21, 20185 alerts

Over time

By month

Warning verification

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

Decatur County, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	11	6	45%	1	100%	20 min
Flash flood warnings	3	0	100%	0

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 3, 3:22 PM CST	Wind Chill Advisory	MEG	19 hr
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	Winter Storm Warning	MEG	30 hr
Jan 15, 4:38 AM CST	Winter Weather Advisory	MEG	34 hr
Jan 16, 11:36 AM CST	Wind Chill Advisory	MEG	24 hr
Jan 17, 3:30 PM CST	Wind Chill Advisory	MEG	18 hr
Feb 9, 8:36 AM CST	River Flood Advisory	MEG	24 hr
Feb 9, 3:37 PM CST	River Flood Warning	MEG	33 days
Feb 10, 12:50 PM CST	River Flood Advisory	MEG	4 days
Feb 11, 8:32 AM CST	River Flood Advisory	OHX	21 hr
Feb 11, 12:23 PM CST	River Flood Warning	MEG	33 hr
Feb 12, 9:00 PM CST	River Flood Advisory	MEG	12 days
Feb 12, 11:39 PM CST	River Flood Advisory	OHX	16 days
Feb 17, 10:30 PM CST	Dense Fog Advisory	MEG	10 hr
Feb 18, 1:08 AM CST	Freezing Fog Advisory	MEG	8 hr
Feb 19, 3:25 PM CST	Flood Watch	MEG	5 days
Feb 22, 10:16 PM CST	Dense Fog Advisory	MEG	3 hr
Feb 24, 1:58 PM CST	River Flood Warning	MEG	16 days
Feb 24, 3:16 PM CST	Tornado Watch	SPC	8 hr
Feb 24, 6:40 PM CST	Mesoscale Discussion	SPC	95 min
Feb 24, 7:27 PM CST	Severe Thunderstorm Warning	MEG	48 min
Feb 24, 8:03 PM CST	Flash Flood Warning	MEG	3 hr
Feb 24, 9:34 PM CST	Mesoscale Discussion	SPC	86 min
Feb 26, 5:33 AM CST	Dense Fog Advisory	MEG	2 hr
Feb 26, 3:04 PM CST	Flood Watch	MEG	69 hr
Feb 28, 8:48 AM CST	Areal Flood Warning	MEG	6 hr
Feb 28, 2:59 PM CST	River Flood Warning	OHX	9 days
Mar 1, 2:01 AM CST	Flash Flood Warning	MEG	9 hr
Mar 9, 9:19 AM CST	River Flood Advisory	OHX	6 days
Mar 11, 9:16 AM CDT	Wind Advisory	MEG	16 hr
Mar 12, 2:56 PM CDT	Freeze Watch	MEG	24 hr
Mar 13, 1:10 PM CDT	River Flood Advisory	MEG	4 days
Mar 13, 2:33 PM CDT	Freeze Warning	MEG	19 hr
Mar 14, 6:11 AM CDT	River Flood Advisory	MEG	4 days
Mar 20, 3:30 AM CDT	Freeze Warning	MEG	28 hr
Mar 21, 3:37 AM CDT	Freeze Warning	MEG	29 hr
Mar 24, 8:45 PM CDT	Severe Thunderstorm Warning	MEG	21 min
Mar 27, 3:23 PM CDT	Flood Watch	MEG	46 hr
Apr 2, 3:35 PM CDT	Wind Advisory	MEG	30 hr
Apr 3, 6:51 PM CDT	Mesoscale Discussion	SPC	114 min
Apr 3, 7:14 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 3, 8:37 PM CDT	Severe Thunderstorm Warning	MEG	23 min
Apr 4, 3:44 AM CDT	Freeze Warning	MEG	29 hr
Apr 7, 3:44 AM CDT	Freeze Warning	MEG	29 hr
Apr 10, 3:01 PM CDT	Frost Advisory	MEG	17 hr
Apr 12, 2:34 PM CDT	Flash Flood Watch	MEG	48 hr
Apr 14, 5:30 AM CDT	Severe Thunderstorm Warning	MEG	60 min
Apr 16, 4:39 AM CDT	Frost Advisory	MEG	27 hr
Apr 16, 3:06 PM CDT	River Flood Advisory	MEG	4 days
Apr 19, 3:05 AM CDT	Frost Advisory	MEG	30 hr
Apr 22, 7:32 PM CDT	Flash Flood Warning	MEG	3 hr
Apr 22, 9:40 PM CDT	River Flood Advisory	MEG	41 hr
Apr 22, 10:04 PM CDT	Areal Flood Warning	MEG	3 hr
Apr 23, 8:39 PM CDT	River Flood Advisory	MEG	8 days
Apr 23, 8:43 PM CDT	River Flood Advisory	OHX	8 days
Apr 24, 2:40 PM CDT	River Flood Warning	MEG	7 days
Apr 25, 3:52 AM CDT	Dense Fog Advisory	MEG	5 hr
Apr 27, 12:33 AM CDT	Dense Fog Advisory	MEG	8 hr
May 1, 6:25 AM CDT	River Flood Advisory	MEG	24 hr
May 5, 10:05 PM CDT	Dense Fog Advisory	MEG	11 hr
May 6, 3:00 PM CDT	Mesoscale Discussion	SPC	3 hr
May 15, 2:35 PM CDT	Special Weather Statement	MEG	40 min
May 16, 1:42 AM CDT	Areal Flood Advisory	MEG	2 hr
May 16, 10:05 AM CDT	Areal Flood Advisory	MEG	3 hr
May 19, 1:36 PM CDT	Severe Thunderstorm Watch	SPC	6 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, 6:26 PM CDT	Mesoscale Discussion	SPC	64 min
May 23, 5:25 AM CDT	Dense Fog Advisory	MEG	3 hr
May 25, 2:30 PM CDT	Special Weather Statement	MEG	30 min
May 28, 7:55 AM CDT	River Flood Advisory	MEG	10 days
May 29, 3:39 AM CDT	Flash Flood Watch	MEG	27 hr
May 29, 7:24 PM CDT	Areal Flood Advisory	MEG	4 hr
May 29, 11:51 PM CDT	Areal Flood Advisory	MEG	114 min
May 30, 1:45 PM CDT	River Flood Advisory	MEG	28 hr
May 31, 5:46 PM CDT	Mesoscale Discussion	SPC	2 hr
May 31, 7:56 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 1, 1:38 AM CDT	Severe Thunderstorm Warning	MEG	52 min
Jun 1, 2:41 AM CDT	Mesoscale Discussion	SPC	34 min
Jun 1, 2:54 AM CDT	Special Weather Statement	MEG	66 min
Jun 2, 1:27 AM CDT	Dense Fog Advisory	MEG	8 hr
Jun 3, 3:02 AM CDT	Special Weather Statement	MEG	43 min
Jun 3, 3:19 AM CDT	Severe Thunderstorm Warning	MEG	24 min
Jun 3, 3:54 AM CDT	Mesoscale Discussion	SPC	66 min
Jun 13, 9:44 AM CDT	Areal Flood Advisory	MEG	2 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, 5:44 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 21, 6:28 PM CDT	Severe Thunderstorm Warning	MEG	32 min
Jun 21, 8:30 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 23, 9:35 AM CDT	Severe Thunderstorm Warning	MEG	55 min
Jun 23, 4:50 PM CDT	Mesoscale Discussion	SPC	115 min
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, 3:12 AM CDT	Heat Advisory	MEG	4 days
Jun 28, 10:22 AM CDT	Mesoscale Discussion	SPC	113 min
Jun 28, 10:46 AM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 28, 12:14 PM CDT	Severe Thunderstorm Warning	MEG	30 min
Jun 28, 8:39 PM CDT	Mesoscale Discussion	SPC	96 min
Jun 28, 8:55 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 28, 9:55 PM CDT	Severe Thunderstorm Warning	MEG	65 min
Jun 28, 10:27 PM CDT	Severe Thunderstorm Warning	MEG	48 min
Jul 4, 3:32 AM CDT	Heat Advisory	MEG	40 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, 2:34 PM CDT	Areal Flood Advisory	MEG	116 min
Jul 19, 3:42 PM CDT	Heat Advisory	MEG	28 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 11, 6:54 PM CDT	Special Weather Statement	MEG	36 min
Aug 11, 7:43 PM CDT	Special Weather Statement	MEG	47 min
Aug 12, 12:26 AM CDT	Special Weather Statement	MEG	49 min
Aug 19, 4:18 AM CDT	Dense Fog Advisory	MEG	5 hr
Aug 20, 4:45 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 26, 9:39 PM CDT	River Flood Advisory	MEG	7 days
Sep 28, 2:05 AM CDT	Dense Fog Advisory	MEG	7 hr
Sep 28, 9:06 AM CDT	Dense Fog Advisory	MEG	54 min
Sep 29, 2:08 AM CDT	Dense Fog Advisory	MEG	8 hr
Oct 21, 3:22 AM CDT	Frost Advisory	MEG	30 hr
Oct 21, 2:46 PM CDT	Freeze Warning	MEG	18 hr
Oct 30, 3:02 PM CDT	Flood Watch	MEG	39 hr
Oct 31, 7:04 PM CDT	Mesoscale Discussion	SPC	116 min
Nov 1, 1:41 AM CDT	Mesoscale Discussion	SPC	3 hr
Nov 2, 11:41 PM CDT	Dense Fog Advisory	MEG	9 hr
Nov 5, 7:04 PM CST	Tornado Watch	SPC	8 hr
Nov 5, 9:28 PM CST	Mesoscale Discussion	SPC	2 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 12, 8:56 PM CST	River Flood Advisory	MEG	11 days
Nov 13, 1:50 PM CST	Winter Weather Advisory	MEG	43 hr
Nov 21, 4:08 AM CST	Freezing Fog Advisory	MEG	5 hr
Nov 25, 3:47 AM CST	Wind Advisory	MEG	25 hr
Dec 1, 10:09 AM CST	Special Weather Statement	MEG	66 min
Dec 1, 10:56 AM CST	Special Weather Statement	MEG	49 min
Dec 1, 2:24 PM CST	Special Weather Statement	MEG	51 min
Dec 1, 5:28 PM CST	Mesoscale Discussion	SPC	62 min
Dec 6, 12:00 PM CST	River Flood Advisory	MEG	7 days
Dec 11, 1:43 AM CST	Freezing Fog Advisory	MEG	10 hr
Dec 11, 1:50 PM CST	River Flood Warning	MEG	4 min
Dec 11, 1:57 PM CST	River Flood Warning	MEG	72 hr
Dec 12, 8:38 PM CST	River Flood Advisory	OHX	5 days
Dec 15, 1:47 PM CST	River Flood Warning	MEG	61 hr
Dec 16, 2:21 PM CST	Dense Fog Advisory	MEG	22 hr
Dec 18, 2:30 AM CST	River Flood Advisory	MEG	58 hr
Dec 20, 1:53 PM CST	River Flood Advisory	MEG	23 hr
Dec 24, 6:57 AM CST	Freezing Fog Advisory	MEG	2 hr
Dec 26, 10:40 AM CST	Wind Advisory	MEG	28 hr
Dec 26, 1:45 PM CST	River Flood Advisory	MEG	31 hr
Dec 27, 8:35 PM CST	River Flood Warning	MEG	14 days
Dec 28, 3:35 PM CST	River Flood Advisory	OHX	71 hr
Dec 30, 12:53 PM CST	River Flood Advisory	MEG	18 hr
Dec 31, 11:22 AM CST	Mesoscale Discussion	SPC	83 min
Dec 31, 11:47 AM CST	Tornado Watch	SPC	5 hr
Dec 31, 12:41 PM CST	Special Weather Statement	MEG	49 min
Dec 31, 2:14 PM CST	River Flood Warning	OHX	8 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	11
Severe Thunderstorm Watch	9
Tornado Watch	4
Mesoscale Discussion	28
Special Weather Statement	11
Flooding
Areal Flood Warning	2
Flash Flood Warning	3
River Flood Warning	10
Flash Flood Watch	2
Flood Watch	4
Areal Flood Advisory	6
River Flood Advisory	24
Winter
Winter Storm Warning	2
Winter Storm Watch	1
Winter Weather Advisory	2
Heat
Heat Advisory	5
Cold
Freeze Warning	7
Freeze Watch	2
Frost Advisory	4
Wind Chill Advisory	3
Wind and dust
Wind Advisory	4
Fog and smoke
Dense Fog Advisory	18
Freezing Fog Advisory	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 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.