Alert archive / Tennessee / Lawrence County

Weather alerts in Lawrence County, Tennessee, 2009

154 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Lawrence County and its neighbors

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts: 154
Warnings: 52
Watches: 42
Advisories: 26
Busiest month: April28 alerts
Busiest day: May 1, 200915 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 10 tornado warnings covering Lawrence County in 2009 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 32 minutes after it went out.

Lawrence County, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	10	3	70%	1	100%	32 min
Severe thunderstorm warnings	20	3	85%	11	27%	23 min
Flash flood warnings	12	6	50%	5	100%	78 min

Each office's whole area, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Nashville, TN: tornado warnings	106	18	83%	34	85%	15 min
NWS Nashville, TN: severe thunderstorm warnings	329	84	74%	227	59%	20 min
NWS Nashville, TN: flash flood warnings	78	23	71%	44	70%	85 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 5, 4:05 AM CST	Flood Watch	OHX	31 hr
Jan 6, 11:18 AM CST	Areal Flood Advisory	OHX	10 hr
Feb 10, 3:58 PM CST	Wind Advisory	OHX	28 hr
Feb 11, 10:02 AM CST	Mesoscale Discussion	SPC	88 min
Feb 11, 10:46 AM CST	Severe Thunderstorm Warning	OHX	29 min
Feb 18, 11:09 AM CST	Tornado Watch	SPC	6 hr
Feb 28, 4:43 AM CST	Winter Weather Advisory	OHX	25 hr
Mar 1, 1:18 AM CST	Winter Storm Warning	OHX	8 hr
Mar 17, 1:03 AM CDT	Dense Fog Advisory	OHX	8 hr
Mar 27, 2:42 PM CDT	Flood Watch	OHX	30 hr
Mar 28, 12:58 PM CDT	Mesoscale Discussion	SPC	92 min
Mar 28, 2:23 PM CDT	Tornado Watch	SPC	7 hr
Mar 28, 5:18 PM CDT	Mesoscale Discussion	SPC	57 min
Apr 2, 1:09 PM CDT	Mesoscale Discussion	SPC	66 min
Apr 2, 1:33 PM CDT	Tornado Watch	SPC	5 hr
Apr 2, 2:35 PM CDT	Severe Thunderstorm Warning	OHX	25 min
Apr 2, 2:37 PM CDT	Severe Thunderstorm Warning	OHX	23 min
Apr 2, 3:42 PM CDT	Mesoscale Discussion	SPC	63 min
Apr 2, 4:43 PM CDT	Areal Flood Warning	OHX	3 hr
Apr 2, 6:02 PM CDT	Tornado Watch	SPC	7 hr
Apr 2, 7:20 PM CDT	Flash Flood Warning	OHX	3 hr
Apr 5, 5:37 PM CDT	Tornado Watch	SPC	5 hr
Apr 5, 6:19 PM CDT	Mesoscale Discussion	SPC	86 min
Apr 5, 6:49 PM CDT	Severe Thunderstorm Warning	OHX	26 min
Apr 5, 10:31 PM CDT	Freeze Watch	OHX	5 hr
Apr 5, 10:31 PM CDT	Freeze Watch	OHX	5 hr
Apr 6, 3:56 AM CDT	Freeze Warning	OHX	29 hr
Apr 6, 3:56 AM CDT	Freeze Warning	OHX	51 hr
Apr 10, 1:22 AM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 10, 8:22 AM CDT	Mesoscale Discussion	SPC	83 min
Apr 10, 8:53 AM CDT	Tornado Watch	SPC	7 hr
Apr 10, 11:14 AM CDT	Mesoscale Discussion	SPC	76 min
Apr 10, 11:23 AM CDT	Tornado Watch PDS	SPC	8 hr
Apr 10, 12:19 PM CDT	Tornado Warning	OHX	26 min
Apr 10, 12:25 PM CDT	Tornado Warning	OHX	50 min
Apr 10, 12:49 PM CDT	Tornado Warning	OHX	26 min
Apr 10, 12:58 PM CDT	Tornado Warning	OHX	32 min
Apr 10, 12:58 PM CDT	Mesoscale Discussion	SPC	92 min
Apr 13, 12:09 PM CDT	Mesoscale Discussion	SPC	66 min
Apr 13, 12:58 PM CDT	Tornado Watch	SPC	7 hr
Apr 19, 4:30 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 1, 1:18 PM CDT	Mesoscale Discussion	SPC	87 min
May 1, 2:10 PM CDT	Severe Thunderstorm Warning	OHX	35 min
May 1, 2:20 PM CDT	Tornado Warning	OHX	25 min
May 1, 2:23 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 1, 2:36 PM CDT	Severe Thunderstorm Warning	OHX	24 min
May 1, 2:41 PM CDT	Tornado Warning	OHX	34 min
May 1, 3:02 PM CDT	Severe Thunderstorm Warning	OHX	28 min
May 1, 3:27 PM CDT	Severe Thunderstorm Warning	OHX	33 min
May 1, 3:48 PM CDT	Mesoscale Discussion	SPC	87 min
May 1, 3:54 PM CDT	Severe Thunderstorm Warning	OHX	36 min
May 1, 4:09 PM CDT	Areal Flood Advisory	OHX	3 hr
May 1, 4:27 PM CDT	Flash Flood Watch	OHX	8 hr
May 1, 5:27 PM CDT	Flash Flood Warning	OHX	5 hr
May 1, 5:44 PM CDT	Severe Thunderstorm Warning	OHX	31 min
May 1, 6:41 PM CDT	Mesoscale Discussion	SPC	64 min
May 2, 3:17 AM CDT	Flood Watch	OHX	48 hr
May 2, 5:16 AM CDT	Flash Flood Warning	OHX	4 hr
May 2, 12:01 PM CDT	River Flood Advisory	OHX	36 hr
May 2, 6:34 PM CDT	River Flood Warning	OHX	16 hr
May 5, 3:10 PM CDT	Flood Watch	OHX	23 hr
May 6, 5:45 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 8, 8:37 AM CDT	Mesoscale Discussion	SPC	53 min
May 8, 9:21 AM CDT	Tornado Watch	SPC	7 hr
May 8, 11:30 AM CDT	Flash Flood Watch	OHX	37 hr
May 15, 2:06 PM CDT	Severe Thunderstorm Warning	OHX	54 min
May 16, 11:27 AM CDT	Flash Flood Watch	OHX	10 hr
May 16, 1:04 PM CDT	Mesoscale Discussion	SPC	56 min
Jun 2, 2:18 PM CDT	Severe Thunderstorm Warning	OHX	27 min
Jun 2, 2:48 PM CDT	Severe Thunderstorm Warning	OHX	27 min
Jun 2, 2:55 PM CDT	Flash Flood Warning	OHX	3 hr
Jun 3, 8:01 PM CDT	Severe Thunderstorm Warning	OHX	44 min
Jun 11, 7:54 AM CDT	Mesoscale Discussion	SPC	66 min
Jun 11, 8:40 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 12, 5:24 PM CDT	Mesoscale Discussion	SPC	96 min
Jun 12, 5:54 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 12, 7:28 PM CDT	Severe Thunderstorm Warning	OHX	32 min
Jun 12, 7:57 PM CDT	Severe Thunderstorm Warning	OHX	24 min
Jun 12, 8:00 PM CDT	Mesoscale Discussion	SPC	90 min
Jun 14, 9:51 AM CDT	Severe Thunderstorm Warning	OHX	38 min
Jun 15, 10:34 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 15, 1:56 PM CDT	Mesoscale Discussion	SPC	64 min
Jun 15, 2:48 PM CDT	Tornado Watch	SPC	3 hr
Jun 15, 3:52 PM CDT	Mesoscale Discussion	SPC	53 min
Jun 15, 4:57 PM CDT	Mesoscale Discussion	SPC	63 min
Jun 15, 5:22 PM CDT	Tornado Warning	OHX	23 min
Jun 15, 5:35 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 15, 5:36 PM CDT	Flash Flood Warning	OHX	114 min
Jun 15, 5:40 PM CDT	Tornado Warning	OHX	35 min
Jun 15, 6:11 PM CDT	Tornado Warning	OHX	34 min
Jun 16, 1:42 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 16, 3:29 PM CDT	Mesoscale Discussion	SPC	61 min
Jun 17, 10:29 AM CDT	Mesoscale Discussion	SPC	61 min
Jun 27, 4:04 AM CDT	Heat Advisory	OHX	16 hr
Jul 4, 8:02 PM CDT	Mesoscale Discussion	SPC	28 min
Jul 5, 1:01 AM CDT	Mesoscale Discussion	SPC	3 hr
Jul 5, 1:15 AM CDT	Severe Thunderstorm Warning	OHX	30 min
Jul 5, 3:19 AM CDT	Areal Flood Advisory	OHX	3 hr
Jul 5, 4:18 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 5, 4:20 AM CDT	Flash Flood Warning	OHX	85 min
Jul 5, 4:53 AM CDT	Areal Flood Advisory	OHX	3 hr
Jul 12, 10:16 PM CDT	Severe Thunderstorm Warning	OHX	44 min
Jul 12, 10:53 PM CDT	Tornado Warning	OHX	28 min
Jul 12, 11:18 PM CDT	Areal Flood Advisory	OHX	3 hr
Jul 15, 1:36 PM CDT	Mesoscale Discussion	SPC	84 min
Jul 15, 9:31 PM CDT	Flash Flood Warning	OHX	104 min
Jul 16, 5:01 AM CDT	Flash Flood Warning	OHX	3 hr
Jul 16, 6:13 AM CDT	Flash Flood Warning	OHX	3 hr
Jul 30, 2:48 PM CDT	Flood Watch	OHX	13 hr
Jul 30, 4:10 PM CDT	Tornado Watch	SPC	6 hr
Jul 30, 5:01 PM CDT	Mesoscale Discussion	SPC	59 min
Jul 30, 6:29 PM CDT	Mesoscale Discussion	SPC	61 min
Jul 30, 7:42 PM CDT	Mesoscale Discussion	SPC	63 min
Aug 1, 2:35 PM CDT	Flash Flood Watch	OHX	13 hr
Aug 4, 6:21 PM CDT	Mesoscale Discussion	SPC	114 min
Aug 4, 6:34 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Aug 4, 8:35 PM CDT	Mesoscale Discussion	SPC	85 min
Aug 11, 4:30 PM CDT	Flash Flood Warning	OHX	2 hr
Aug 11, 4:43 PM CDT	Severe Thunderstorm Warning	OHX	62 min
Aug 12, 3:47 AM CDT	Dense Fog Advisory	OHX	3 hr
Sep 7, 10:49 PM CDT	Areal Flood Advisory	OHX	3 hr
Sep 16, 10:22 AM CDT	Areal Flood Advisory	OHX	6 hr
Sep 16, 3:36 PM CDT	Flood Watch	OHX	51 hr
Sep 17, 10:08 AM CDT	Areal Flood Warning	OHX	6 hr
Sep 19, 2:39 AM CDT	Flood Watch	OHX	45 hr
Sep 20, 3:39 PM CDT	Flash Flood Warning	OHX	3 hr
Sep 20, 5:00 PM CDT	Areal Flood Advisory	OHX	3 hr
Sep 23, 1:27 AM CDT	Flash Flood Warning	OHX	3 hr
Sep 23, 3:20 AM CDT	Flash Flood Watch	OHX	16 hr
Sep 23, 11:17 AM CDT	River Flood Advisory	OHX	20 hr
Sep 25, 4:06 AM CDT	Flash Flood Watch	OHX	36 hr
Sep 26, 9:27 AM CDT	Areal Flood Advisory	OHX	3 hr
Oct 6, 11:12 PM CDT	Areal Flood Advisory	OHX	3 hr
Oct 9, 12:08 PM CDT	Mesoscale Discussion	SPC	67 min
Oct 9, 12:24 PM CDT	Tornado Watch	SPC	7 hr
Oct 9, 2:39 PM CDT	Mesoscale Discussion	SPC	96 min
Oct 17, 3:59 AM CDT	Frost Advisory	OHX	28 hr
Oct 17, 3:59 AM CDT	Freeze Watch	OHX	24 hr
Oct 18, 3:33 AM CDT	Freeze Warning	OHX	29 hr
Oct 24, 11:01 AM CDT	Frost Advisory	OHX	21 hr
Nov 1, 3:04 AM CST	Frost Advisory	OHX	28 hr
Nov 2, 3:40 AM CST	Freeze Watch	OHX	31 hr
Nov 3, 10:43 AM CST	Frost Advisory	OHX	19 hr
Nov 4, 3:32 PM CST	Freeze Watch	OHX	24 hr
Nov 5, 3:16 PM CST	Freeze Warning	OHX	16 hr
Nov 7, 12:30 PM CST	Red Flag Warning	OHX	6 hr
Nov 19, 2:56 PM CST	Frost Advisory	OHX	16 hr
Nov 25, 3:39 PM CST	Freeze Watch	OHX	23 hr
Nov 26, 3:06 PM CST	Freeze Warning	OHX	17 hr
Dec 8, 11:47 AM CST	Wind Advisory	OHX	26 hr
Dec 8, 5:48 PM CST	Tornado Watch	SPC	6 hr
Dec 9, 8:06 AM CST	River Flood Advisory	OHX	5 hr
Dec 21, 10:39 PM CST	Freezing Fog Advisory	OHX	10 hr
Dec 23, 4:28 AM CST	Wind Advisory	OHX	47 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	20
Tornado Warning	10
Severe Thunderstorm Watch	10
Tornado Watch	13
Mesoscale Discussion	34
Flooding
Areal Flood Warning	2
Flash Flood Warning	12
River Flood Warning	1
Flash Flood Watch	6
Flood Watch	7
Areal Flood Advisory	10
River Flood Advisory	3
Winter
Winter Storm Warning	1
Winter Weather Advisory	1
Heat
Heat Advisory	1
Cold
Freeze Warning	5
Freeze Watch	6
Frost Advisory	5
Wind and dust
Wind Advisory	3
Fire
Red Flag Warning	1
Fog and smoke
Dense Fog Advisory	2
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 2008 2010

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.