Alert archive / Tennessee / Williamson County

Weather alerts in Williamson County, Tennessee, 2022

162 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Williamson County and its neighbors

Each county as a circle sized by its count in 2022. Tap one for its archive.

Alerts: 162
Warnings: 37
Watches: 13
Advisories: 59
Busiest month: July26 alerts
Busiest day: January 1, 20226 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 3 tornado warnings covering Williamson County in 2022 had a tornado report inside them.

Williamson County, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	0	100%	0
Severe thunderstorm warnings	25	18	28%	29	86%	21 min
Flash flood warnings	0			0

Each office's whole area, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Nashville, TN: tornado warnings	10	0	100%	1	0%
NWS Nashville, TN: severe thunderstorm warnings	159	83	48%	303	70%	18 min
NWS Nashville, TN: flash flood warnings	16	6	63%	26	77%	63 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, 10:27 AM CST	Wind Advisory	OHX	6 hr
Jan 1, 10:50 AM CST	Tornado Watch	SPC	7 hr
Jan 1, 12:38 PM CST	Mesoscale Discussion	SPC	97 min
Jan 1, 12:43 PM CST	Severe Thunderstorm Warning	OHX	47 min
Jan 1, 12:56 PM CST	Tornado Warning	OHX	16 min
Jan 1, 1:02 PM CST	Severe Thunderstorm Warning	OHX	43 min
Jan 2, 3:09 AM CST	Winter Weather Advisory	OHX	24 hr
Jan 5, 10:53 AM CST	Winter Weather Advisory	OHX	27 hr
Jan 5, 9:05 PM CST	Winter Storm Warning	OHX	23 hr
Jan 6, 4:47 AM CST	Mesoscale Discussion	SPC	4 hr
Jan 9, 11:33 AM CST	Areal Flood Advisory	OHX	3 hr
Jan 14, 2:47 AM CST	Winter Storm Watch	OHX	35 hr
Jan 15, 2:15 PM CST	Winter Storm Warning	OHX	34 hr
Jan 18, 4:29 AM CST	Freezing Fog Advisory	OHX	5 hr
Jan 20, 12:01 PM CST	River Flood Advisory	OHX	12 hr
Feb 2, 1:50 AM CST	Flood Watch	OHX	41 hr
Feb 2, 2:50 PM CST	Winter Weather Advisory	OHX	39 hr
Feb 3, 3:39 PM CST	Areal Flood Advisory	OHX	2 hr
Feb 4, 6:05 AM CST	Winter Weather Advisory	OHX	5 hr
Feb 11, 1:16 PM CST	Red Flag Warning	OHX	7 hr
Feb 16, 3:01 AM CST	Wind Advisory	OHX	42 hr
Feb 17, 1:11 PM CST	Mesoscale Discussion	SPC	2 hr
Feb 17, 3:54 PM CST	Special Weather Statement	OHX	51 min
Feb 17, 4:28 PM CST	Areal Flood Advisory	OHX	3 hr
Feb 17, 4:32 PM CST	Special Weather Statement	OHX	43 min
Feb 17, 5:19 PM CST	Areal Flood Advisory	OHX	3 hr
Feb 21, 3:08 AM CST	Flood Watch	OHX	51 hr
Feb 22, 7:30 AM CST	Mesoscale Discussion	SPC	90 min
Feb 22, 9:26 AM CST	Mesoscale Discussion	SPC	2 hr
Feb 22, 10:22 AM CST	Areal Flood Advisory	OHX	3 hr
Feb 22, 10:34 AM CST	Areal Flood Advisory	OHX	3 hr
Feb 22, 11:03 AM CST	Areal Flood Advisory	OHX	3 hr
Feb 22, 4:31 PM CST	Areal Flood Advisory	OHX	119 min
Feb 22, 10:52 PM CST	River Flood Advisory	OHX	19 hr
Feb 23, 1:41 PM CST	Flood Watch	OHX	37 hr
Feb 23, 6:02 PM CST	River Flood Advisory	OHX	20 hr
Feb 24, 8:05 AM CST	Areal Flood Advisory	OHX	5 hr
Feb 24, 10:36 AM CST	River Flood Advisory	OHX	25 hr
Feb 24, 10:37 AM CST	River Flood Advisory	OHX	29 hr
Feb 24, 1:34 PM CST	River Flood Advisory	OHX	35 hr
Mar 7, 1:53 AM CST	Wind Advisory	OHX	10 hr
Mar 7, 6:52 AM CST	Special Weather Statement	OHX	38 min
Mar 7, 7:35 AM CST	Special Weather Statement	OHX	40 min
Mar 10, 1:51 PM CST	Winter Weather Advisory	OHX	37 hr
Mar 11, 8:24 PM CST	Mesoscale Discussion	SPC	5 hr
Mar 16, 11:28 PM CDT	Dense Fog Advisory	OHX	153 days
Mar 18, 7:16 PM CDT	Special Weather Statement	OHX	29 min
Mar 22, 2:41 AM CDT	Wind Advisory	OHX	19 hr
Mar 22, 4:55 PM CDT	Mesoscale Discussion	SPC	95 min
Mar 22, 6:48 PM CDT	Special Weather Statement	OHX	42 min
Mar 23, 12:06 PM CDT	Wind Advisory	OHX	7 hr
Mar 29, 3:36 AM CDT	Wind Advisory	OHX	47 hr
Mar 30, 3:39 PM CDT	Mesoscale Discussion	SPC	2 hr
Mar 30, 5:29 PM CDT	Tornado Watch	SPC	8 hr
Mar 30, 7:56 PM CDT	Mesoscale Discussion	SPC	94 min
Mar 30, 8:26 PM CDT	Special Weather Statement	OHX	64 min
Mar 30, 9:03 PM CDT	Severe Thunderstorm Warning	OHX	27 min
Apr 1, 3:44 AM CDT	Frost Advisory	OHX	28 hr
Apr 6, 12:02 AM CDT	Dense Fog Advisory	OHX	5 hr
Apr 8, 2:44 PM CDT	Frost Advisory	OHX	11 hr
Apr 9, 2:09 PM CDT	Frost Advisory	OHX	18 hr
Apr 12, 7:08 AM CDT	Areal Flood Advisory	OHX	112 min
Apr 12, 9:04 AM CDT	Areal Flood Advisory	OHX	116 min
Apr 13, 2:25 AM CDT	Wind Advisory	OHX	19 hr
Apr 13, 4:48 PM CDT	Mesoscale Discussion	SPC	117 min
Apr 13, 5:01 PM CDT	Tornado Watch	SPC	4 hr
Apr 13, 7:16 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OHX	44 min
Apr 13, 7:52 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OHX	38 min
Apr 13, 7:54 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OHX	36 min
Apr 13, 7:54 PM CDT	Tornado Warning	OHX	36 min
Apr 18, 10:42 PM CDT	Frost Advisory	OHX	10 hr
May 5, 1:52 PM CDT	Mesoscale Discussion	SPC	113 min
May 5, 2:35 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 5, 4:56 PM CDT	Mesoscale Discussion	SPC	94 min
May 6, 1:06 PM CDT	Mesoscale Discussion	SPC	69 min
May 6, 1:12 PM CDT	Special Weather Statement	OHX	48 min
May 6, 1:55 PM CDT	Severe Thunderstorm Warning	OHX	35 min
May 18, 1:38 PM CDT	Mesoscale Discussion	SPC	2 hr
May 21, 6:27 PM CDT	Special Weather Statement	OHX	48 min
May 21, 7:08 PM CDT	Special Weather Statement	OHX	37 min
May 21, 7:24 PM CDT	Severe Thunderstorm Warning	OHX	13 min
May 21, 7:55 PM CDT	Special Weather Statement	OHX	50 min
May 24, 3:50 PM CDT	Special Weather Statement	OHX	25 min
May 25, 5:03 PM CDT	Mesoscale Discussion	SPC	117 min
May 25, 5:25 PM CDT	Severe Thunderstorm Warning	OHX	22 min
May 26, 10:36 AM CDT	Mesoscale Discussion	SPC	114 min
May 26, 1:44 PM CDT	Special Weather Statement	OHX	46 min
Jun 6, 12:34 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 6, 9:37 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 7, 3:17 PM CDT	Severe Thunderstorm Warning	OHX	28 min
Jun 7, 3:43 PM CDT	Special Weather Statement	OHX	32 min
Jun 7, 4:01 PM CDT	Special Weather Statement	OHX	44 min
Jun 7, 4:09 PM CDT	Severe Thunderstorm Warning	OHX	21 min
Jun 7, 4:26 PM CDT	Special Weather Statement	OHX	34 min
Jun 12, 2:42 AM CDT	Heat Advisory	OHX	40 hr
Jun 13, 2:10 AM CDT	Heat Advisory	OHX	36 hr
Jun 14, 2:42 AM CDT	Heat Advisory	OHX	64 hr
Jun 17, 8:48 AM CDT	Mesoscale Discussion	SPC	87 min
Jun 17, 9:01 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 17, 9:58 AM CDT	Severe Thunderstorm Warning	OHX	32 min
Jun 17, 10:27 AM CDT	Severe Thunderstorm Warning	OHX	33 min
Jun 17, 10:56 AM CDT	Severe Thunderstorm Warning	OHX	34 min
Jun 17, 11:06 AM CDT	Mesoscale Discussion	SPC	84 min
Jun 26, 10:08 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 4, 12:13 PM CDT	Heat Advisory	OHX	4 days
Jul 6, 2:31 AM CDT	Excessive Heat Warning	OHX	66 hr
Jul 6, 2:47 PM CDT	Special Weather Statement	OHX	28 min
Jul 7, 12:49 PM CDT	Mesoscale Discussion	SPC	116 min
Jul 7, 1:25 PM CDT	Severe Thunderstorm Warning	OHX	22 min
Jul 7, 2:48 PM CDT	Special Weather Statement	OHX	27 min
Jul 7, 2:54 PM CDT	Severe Thunderstorm Warning	OHX	24 min
Jul 7, 3:20 PM CDT	Special Weather Statement	OHX	25 min
Jul 9, 2:50 AM CDT	Special Weather Statement	OHX	40 min
Jul 9, 2:54 AM CDT	Severe Thunderstorm Warning	OHX	36 min
Jul 12, 2:29 PM CDT	Mesoscale Discussion	SPC	91 min
Jul 12, 6:18 PM CDT	Severe Thunderstorm Warning	OHX	27 min
Jul 12, 6:41 PM CDT	Severe Thunderstorm Warning	OHX	34 min
Jul 12, 7:51 PM CDT	Severe Thunderstorm Warning	OHX	54 min
Jul 12, 8:46 PM CDT	Special Weather Statement	OHX	29 min
Jul 12, 9:03 PM CDT	Severe Thunderstorm Warning	OHX	27 min
Jul 19, 3:04 AM CDT	Heat Advisory	OHX	40 hr
Jul 22, 2:04 PM CDT	Heat Advisory	OHX	29 hr
Jul 23, 1:31 PM CDT	Heat Advisory	OHX	29 hr
Jul 25, 4:14 PM CDT	Special Weather Statement	OHX	31 min
Jul 26, 1:18 PM CDT	Mesoscale Discussion	SPC	117 min
Jul 26, 2:49 PM CDT	Special Weather Statement	OHX	41 min
Jul 28, 3:11 PM CDT	Special Weather Statement	OHX	34 min
Jul 28, 3:32 PM CDT	Severe Thunderstorm Warning	OHX	43 min
Jul 29, 7:49 AM CDT	Areal Flood Advisory	OHX	4 hr
Jul 29, 7:54 AM CDT	Areal Flood Advisory	OHX	4 hr
Aug 7, 1:34 PM CDT	Areal Flood Advisory	OHX	3 hr
Aug 10, 1:08 PM CDT	Areal Flood Advisory	OHX	2 hr
Aug 20, 1:19 PM CDT	Special Weather Statement	OHX	41 min
Aug 20, 2:00 PM CDT	Special Weather Statement	OHX	45 min
Aug 29, 4:20 PM CDT	Areal Flood Advisory	OHX	2 hr
Aug 29, 4:25 PM CDT	Special Weather Statement	OHX	35 min
Sep 3, 1:06 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 4, 2:30 AM CDT	Flood Watch	OHX	41 hr
Sep 25, 12:03 AM CDT	Special Weather Statement	OHX	42 min
Oct 8, 2:32 AM CDT	Frost Advisory	OHX	30 hr
Oct 12, 3:36 PM CDT	Severe Thunderstorm Warning	OHX	39 min
Oct 12, 3:54 PM CDT	Tornado Warning	OHX	36 min
Oct 12, 3:56 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Oct 12, 4:20 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OHX	40 min
Oct 14, 6:30 AM CDT	Red Flag Warning	OHX	13 hr
Oct 16, 2:46 AM CDT	Freeze Watch	OHX	11 hr
Oct 16, 1:30 PM CDT	Freeze Warning	OHX	44 hr
Oct 18, 1:33 AM CDT	Freeze Warning	OHX	31 hr
Oct 19, 2:00 PM CDT	Freeze Warning	OHX	19 hr
Oct 24, 2:28 PM CDT	Wind Advisory	OHX	29 hr
Nov 4, 1:56 PM CDT	Wind Advisory	OHX	28 hr
Nov 7, 5:40 AM CST	Dense Fog Advisory	OHX	2 hr
Nov 25, 11:40 PM CST	Dense Fog Advisory	OHX	8 hr
Nov 26, 7:33 PM CST	Wind Advisory	OHX	19 hr
Nov 29, 5:45 PM CST	Severe Thunderstorm Warning	OHX	30 min
Dec 7, 10:43 AM CST	Areal Flood Advisory	OHX	5 hr
Dec 9, 7:56 PM CST	Dense Fog Advisory	OHX	13 hr
Dec 20, 9:49 AM CST	Wind Chill Watch	OHX	17 hr
Dec 21, 2:19 AM CST	Wind Chill Warning	OHX	3 days
Dec 21, 2:42 PM CST	Winter Weather Advisory	OHX	39 hr
Dec 23, 1:23 AM CST	Wind Chill Advisory	OHX	35 hr
Dec 26, 5:54 AM CST	Winter Weather Advisory	OHX	6 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	25
Tornado Warning	3
Severe Thunderstorm Watch	3
Tornado Watch	3
Mesoscale Discussion	25
Special Weather Statement	28
Flooding
Flood Watch	4
Areal Flood Advisory	17
River Flood Advisory	6
Winter
Winter Storm Warning	2
Winter Storm Watch	1
Winter Weather Advisory	7
Heat
Excessive Heat Warning	1
Heat Advisory	7
Cold
Freeze Warning	3
Wind Chill Warning	1
Freeze Watch	1
Wind Chill Watch	1
Frost Advisory	5
Wind Chill Advisory	1
Wind and dust
Wind Advisory	10
Fire
Red Flag Warning	2
Fog and smoke
Dense Fog Advisory	5
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 2021 2023

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.