Alert archive / Tennessee / Marshall County

Weather alerts in Marshall County, Tennessee, 2009

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

Marshall County and its neighbors

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

Alerts: 146
Warnings: 42
Watches: 42
Advisories: 22
Busiest month: April30 alerts
Busiest day: April 10, 200914 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 10 tornado warnings covering Marshall County in 2009 had a tornado report inside them.

Marshall County, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	10	0	100%	0
Severe thunderstorm warnings	16	6	63%	6	83%	21 min
Flash flood warnings	3	1	67%	0

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, 10:38 AM CST	Tornado Watch	SPC	6 hr
Feb 11, 11:10 AM CST	Severe Thunderstorm Warning	OHX	50 min
Feb 11, 12:01 PM CST	Tornado Warning	OHX	14 min
Feb 18, 11:09 AM CST	Tornado Watch	SPC	6 hr
Feb 27, 3:58 AM CST	Severe Thunderstorm Watch	SPC	119 min
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 11, 4:11 PM CDT	Winter Weather Advisory	OHX	34 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
Mar 28, 5:40 PM CDT	Severe Thunderstorm Warning	OHX	35 min
Mar 28, 5:59 PM CDT	Severe Thunderstorm Warning	OHX	31 min
Mar 28, 6:09 PM CDT	Severe Thunderstorm Warning	OHX	36 min
Mar 28, 6:26 PM CDT	Severe Thunderstorm Warning	OHX	34 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, 3:42 PM CDT	Mesoscale Discussion	SPC	63 min
Apr 2, 6:02 PM CDT	Tornado Watch	SPC	7 hr
Apr 2, 9:15 PM CDT	Mesoscale Discussion	SPC	90 min
Apr 5, 5:37 PM CDT	Tornado Watch	SPC	5 hr
Apr 5, 6:19 PM CDT	Mesoscale Discussion	SPC	86 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, 3:33 AM CDT	Mesoscale Discussion	SPC	57 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, 12:14 PM CDT	Tornado Warning	OHX	31 min
Apr 10, 12:23 PM CDT	Severe Thunderstorm Warning	OHX	37 min
Apr 10, 12:31 PM CDT	Tornado Warning	OHX	29 min
Apr 10, 12:46 PM CDT	Tornado Warning	OHX	29 min
Apr 10, 12:56 PM CDT	Tornado Warning	OHX	34 min
Apr 10, 12:58 PM CDT	Mesoscale Discussion	SPC	92 min
Apr 10, 1:00 PM CDT	Tornado Warning	OHX	30 min
Apr 10, 1:12 PM CDT	Tornado Warning	OHX	33 min
Apr 10, 1:24 PM CDT	Areal Flood Advisory	OHX	3 hr
Apr 13, 12:09 PM CDT	Mesoscale Discussion	SPC	66 min
Apr 13, 12:58 PM CDT	Tornado Watch	SPC	7 hr
Apr 13, 2:51 PM CDT	Severe Thunderstorm Warning	OHX	24 min
Apr 13, 3:22 PM CDT	Mesoscale Discussion	SPC	53 min
Apr 19, 4:30 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 1, 3:33 AM CDT	Severe Thunderstorm Warning	OHX	27 min
May 1, 1:18 PM CDT	Mesoscale Discussion	SPC	87 min
May 1, 2:23 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 1, 3:11 PM CDT	Tornado Warning	OHX	34 min
May 1, 4:14 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, 6:41 PM CDT	Mesoscale Discussion	SPC	64 min
May 2, 3:17 AM CDT	Flood Watch	OHX	48 hr
May 2, 3:18 AM CDT	Flash Flood Warning	OHX	4 hr
May 2, 6:29 PM CDT	River Flood Warning	OHX	16 hr
May 3, 10:41 AM CDT	River Flood Warning	OHX	41 hr
May 3, 11:43 AM CDT	River Flood Advisory	OHX	36 hr
May 3, 7:24 PM CDT	River Flood Warning	OHX	38 hr
May 5, 3:10 PM CDT	Flood Watch	OHX	23 hr
May 8, 4:29 AM CDT	Severe Thunderstorm Watch	SPC	3 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 8, 3:24 PM CDT	Mesoscale Discussion	SPC	66 min
May 8, 3:42 PM CDT	Tornado Watch	SPC	7 hr
May 8, 7:30 PM CDT	Mesoscale Discussion	SPC	90 min
May 15, 12:57 PM CDT	Mesoscale Discussion	SPC	63 min
May 16, 11:27 AM CDT	Flash Flood Watch	OHX	10 hr
May 16, 1:04 PM CDT	Mesoscale Discussion	SPC	56 min
May 28, 12:28 PM CDT	Mesoscale Discussion	SPC	62 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 11, 8:18 PM CDT	Tornado Watch	SPC	4 hr
Jun 11, 10:29 PM CDT	Mesoscale Discussion	SPC	61 min
Jun 12, 5:54 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 12, 8:00 PM CDT	Mesoscale Discussion	SPC	90 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 16, 1:10 PM CDT	Mesoscale Discussion	SPC	35 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 17, 5:17 PM CDT	Severe Thunderstorm Warning	OHX	28 min
Jun 17, 5:49 PM CDT	Severe Thunderstorm Warning	OHX	26 min
Jun 17, 6:14 PM CDT	Severe Thunderstorm Warning	OHX	17 min
Jun 27, 1:06 PM CDT	Mesoscale Discussion	SPC	54 min
Jun 30, 11:35 PM CDT	Mesoscale Discussion	SPC	85 min
Jul 4, 8:02 PM CDT	Mesoscale Discussion	SPC	28 min
Jul 5, 1:01 AM CDT	Mesoscale Discussion	SPC	3 hr
Jul 5, 4:18 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 5, 4:53 AM CDT	Areal Flood Advisory	OHX	3 hr
Jul 5, 1:21 PM CDT	Mesoscale Discussion	SPC	54 min
Jul 12, 3:11 PM CDT	Severe Thunderstorm Warning	OHX	22 min
Jul 12, 8:07 PM CDT	Severe Thunderstorm Warning	OHX	38 min
Jul 12, 8:28 PM CDT	Severe Thunderstorm Warning	OHX	26 min
Jul 12, 8:43 PM CDT	Severe Thunderstorm Warning	OHX	32 min
Jul 15, 1:36 PM CDT	Mesoscale Discussion	SPC	84 min
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
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 12, 3:47 AM CDT	Dense Fog 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, 7:55 AM CDT	Flash Flood Warning	OHX	3 hr
Sep 17, 9:45 AM CDT	Areal Flood Warning	OHX	6 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, 5:00 PM CDT	Areal Flood Advisory	OHX	3 hr
Sep 20, 6:46 PM CDT	Areal Flood Advisory	OHX	3 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 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 9, 3:17 PM CDT	Severe Thunderstorm Warning	OHX	28 min
Oct 9, 3:21 PM CDT	Tornado Warning	OHX	24 min
Oct 9, 3:38 PM CDT	Tornado Warning	OHX	37 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
Oct 29, 4:05 AM CDT	Dense Fog Advisory	OHX	4 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	Freeze Warning	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 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	16
Tornado Warning	10
Severe Thunderstorm Watch	10
Tornado Watch	14
Mesoscale Discussion	40
Flooding
Areal Flood Warning	2
Flash Flood Warning	3
River Flood Warning	3
Flash Flood Watch	5
Flood Watch	7
Areal Flood Advisory	8
River Flood Advisory	1
Winter
Winter Storm Warning	1
Winter Weather Advisory	2
Cold
Freeze Warning	6
Freeze Watch	6
Frost Advisory	4
Wind and dust
Wind Advisory	3
Fire
Red Flag Warning	1
Fog and smoke
Dense Fog Advisory	3
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.