Alert archive / Tennessee / Montgomery County

Weather alerts in Montgomery County, Tennessee, 2011

209 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Montgomery County and its neighbors

Each county as a circle sized by its count in 2011. Tap one for its archive.

Alerts: 209
Warnings: 78
Watches: 37
Advisories: 37
Busiest month: April62 alerts
Busiest day: April 27, 201116 alerts

Over time

By month

Warning verification

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

2 of 12 tornado warnings covering Montgomery County in 2011 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.

Montgomery County, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	12	2	83%	1	0%
Severe thunderstorm warnings	34	20	41%	10	100%	19 min
Flash flood warnings	9	4	56%	0

Each office's whole area, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Nashville, TN: tornado warnings	104	17	84%	41	73%	12 min
NWS Nashville, TN: severe thunderstorm warnings	400	192	52%	508	69%	21 min
NWS Nashville, TN: flash flood warnings	46	10	78%	23	65%	151 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, 3:46 AM CST	Winter Storm Watch	OHX	30 hr
Jan 8, 9:08 PM CST	Winter Storm Warning	OHX	43 hr
Jan 10, 4:31 AM CST	Winter Weather Advisory	OHX	35 hr
Jan 19, 12:06 PM CST	Winter Weather Advisory	OHX	34 hr
Jan 25, 4:13 AM CST	Winter Storm Watch	OHX	9 hr
Jan 25, 1:14 PM CST	Winter Storm Warning	OHX	22 hr
Jan 26, 3:00 AM CST	Winter Weather Advisory	OHX	6 hr
Jan 31, 4:21 AM CST	Wind Advisory	OHX	50 hr
Feb 4, 3:16 AM CST	Winter Weather Advisory	OHX	30 hr
Feb 6, 3:59 PM CST	Winter Weather Advisory	OHX	30 hr
Feb 7, 11:21 AM CST	Winter Storm Warning	OHX	7 hr
Feb 8, 3:16 PM CST	Winter Weather Advisory	OHX	32 hr
Feb 9, 12:22 PM CST	Winter Storm Warning	OHX	8 hr
Feb 23, 3:52 AM CST	Flash Flood Watch	OHX	45 hr
Feb 23, 9:54 AM CST	River Flood Watch	OHX	62 hr
Feb 24, 9:57 AM CST	River Flood Warning	OHX	32 hr
Feb 24, 10:18 AM CST	River Flood Advisory	OHX	50 hr
Feb 24, 2:12 PM CST	Mesoscale Discussion	SPC	93 min
Feb 24, 2:34 PM CST	Tornado Watch	SPC	7 hr
Feb 24, 5:26 PM CST	Mesoscale Discussion	SPC	94 min
Feb 24, 7:22 PM CST	Mesoscale Discussion	SPC	83 min
Feb 24, 7:41 PM CST	Tornado Watch	SPC	5 hr
Feb 24, 8:58 PM CST	Severe Thunderstorm Warning	OHX	63 min
Feb 24, 9:00 PM CST	Tornado Warning	OHX	30 min
Feb 24, 9:20 PM CST	Tornado Warning	OHX	25 min
Feb 24, 9:30 PM CST	Severe Thunderstorm Warning	OHX	60 min
Feb 27, 4:08 PM CST	Severe Thunderstorm Warning	OHX	37 min
Feb 27, 4:30 PM CST	Tornado Warning	OHX	45 min
Feb 27, 4:31 PM CST	Tornado Watch	SPC	3 hr
Feb 28, 1:05 AM CST	Mesoscale Discussion	SPC	25 min
Feb 28, 1:33 AM CST	Tornado Watch	SPC	7 hr
Feb 28, 5:55 AM CST	Flash Flood Warning	OHX	3 hr
Feb 28, 5:59 AM CST	Tornado Watch	SPC	7 hr
Feb 28, 6:35 AM CST	Severe Thunderstorm Warning	OHX	25 min
Feb 28, 6:52 AM CST	Flash Flood Warning	OHX	5 hr
Feb 28, 7:00 AM CST	Severe Thunderstorm Warning	OHX	30 min
Feb 28, 8:43 AM CST	Flash Flood Warning	OHX	3 hr
Feb 28, 11:50 AM CST	Areal Flood Advisory	OHX	3 hr
Feb 28, 10:00 PM CST	River Flood Advisory	OHX	29 hr
Feb 28, 10:10 PM CST	River Flood Warning	OHX	16 hr
Feb 28, 11:18 PM CST	River Flood Advisory	OHX	32 hr
Mar 4, 4:00 AM CST	Flood Watch	OHX	36 hr
Mar 5, 6:59 AM CST	River Flood Advisory	OHX	27 hr
Mar 23, 1:40 PM CDT	Mesoscale Discussion	SPC	65 min
Mar 23, 4:06 PM CDT	Tornado Watch	SPC	6 hr
Apr 2, 3:25 PM CDT	Wind Advisory	OHX	48 hr
Apr 4, 7:22 AM CDT	Tornado Watch	SPC	7 hr
Apr 4, 11:24 AM CDT	Severe Thunderstorm Warning	OHX	36 min
Apr 4, 11:34 AM CDT	Tornado Watch	SPC	5 hr
Apr 4, 11:50 AM CDT	Tornado Warning	OHX	25 min
Apr 4, 11:54 AM CDT	Severe Thunderstorm Warning	OHX	51 min
Apr 4, 12:41 PM CDT	Tornado Warning	OHX	34 min
Apr 4, 1:07 PM CDT	Severe Thunderstorm Warning	OHX	38 min
Apr 4, 1:28 PM CDT	Severe Thunderstorm Warning	OHX	62 min
Apr 4, 1:40 PM CDT	Tornado Warning	OHX	35 min
Apr 9, 6:41 AM CDT	Mesoscale Discussion	SPC	2 hr
Apr 9, 7:25 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 11, 4:07 AM CDT	Wind Advisory	OHX	11 hr
Apr 11, 8:58 AM CDT	Mesoscale Discussion	SPC	62 min
Apr 11, 10:31 AM CDT	Tornado Watch	SPC	6 hr
Apr 11, 12:37 PM CDT	Mesoscale Discussion	SPC	53 min
Apr 14, 4:03 PM CDT	Wind Advisory	OHX	35 hr
Apr 15, 2:09 PM CDT	Tornado Watch	SPC	7 hr
Apr 15, 5:57 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 15, 8:15 PM CDT	Mesoscale Discussion	SPC	60 min
Apr 19, 3:59 AM CDT	Wind Advisory	OHX	15 hr
Apr 19, 10:14 PM CDT	Tornado Watch	SPC	7 hr
Apr 19, 11:56 PM CDT	Mesoscale Discussion	SPC	94 min
Apr 20, 12:03 AM CDT	Severe Thunderstorm Warning	OHX	42 min
Apr 20, 12:44 AM CDT	Tornado Warning	OHX	31 min
Apr 20, 12:46 AM CDT	Severe Thunderstorm Warning	OHX	44 min
Apr 20, 1:07 AM CDT	Tornado Warning	OHX	23 min
Apr 23, 1:04 PM CDT	Mesoscale Discussion	SPC	86 min
Apr 24, 3:01 PM CDT	Mesoscale Discussion	SPC	89 min
Apr 25, 4:43 AM CDT	Flash Flood Watch	OHX	64 hr
Apr 25, 7:18 AM CDT	Areal Flood Advisory	OHX	3 hr
Apr 25, 1:48 PM CDT	Mesoscale Discussion	SPC	87 min
Apr 25, 2:29 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 25, 3:37 PM CDT	Tornado Warning	OHX	23 min
Apr 25, 3:48 PM CDT	River Flood Watch	OHX	70 hr
Apr 25, 3:48 PM CDT	River Flood Watch	OHX	70 hr
Apr 25, 11:05 PM CDT	Mesoscale Discussion	SPC	115 min
Apr 25, 11:42 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 25, 11:46 PM CDT	Flash Flood Watch	OHX	45 hr
Apr 26, 12:43 AM CDT	Severe Thunderstorm Warning	OHX	32 min
Apr 26, 1:10 AM CDT	Severe Thunderstorm Warning	OHX	35 min
Apr 26, 3:02 PM CDT	Tornado Watch PDS	SPC	7 hr
Apr 26, 6:17 PM CDT	Mesoscale Discussion	SPC	118 min
Apr 26, 6:24 PM CDT	Wind Advisory	OHX	22 hr
Apr 26, 9:13 PM CDT	Mesoscale Discussion	SPC	62 min
Apr 26, 9:58 PM CDT	Tornado Watch	SPC	7 hr
Apr 26, 11:18 PM CDT	Severe Thunderstorm Warning	OHX	42 min
Apr 26, 11:22 PM CDT	Tornado Warning	OHX	23 min
Apr 26, 11:31 PM CDT	Tornado Warning	OHX	29 min
Apr 26, 11:53 PM CDT	Severe Thunderstorm Warning	OHX	55 min
Apr 27, 12:58 AM CDT	Areal Flood Warning	OHX	20 hr
Apr 27, 2:18 AM CDT	Flash Flood Warning	OHX	4 hr
Apr 27, 2:27 AM CDT	River Flood Warning	OHX	57 hr
Apr 27, 4:52 AM CDT	Flash Flood Warning	OHX	3 hr
Apr 27, 12:03 PM CDT	Flash Flood Warning	OHX	9 hr
Apr 27, 12:03 PM CDT	River Flood Warning	OHX	50 hr
Apr 27, 12:08 PM CDT	Mesoscale Discussion	SPC	67 min
Apr 27, 12:42 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 27, 3:06 PM CDT	Mesoscale Discussion	SPC	54 min
Apr 27, 3:36 PM CDT	Tornado Watch PDS	SPC	8 hr
Apr 29, 12:07 PM CDT	Areal Flood Warning	OHX	48 hr
Apr 29, 2:22 PM CDT	River Flood Advisory	OHX	4 days
May 1, 3:17 AM CDT	Severe Thunderstorm Warning	OHX	28 min
May 1, 3:40 AM CDT	Flash Flood Watch	OHX	55 hr
May 1, 3:50 AM CDT	Mesoscale Discussion	SPC	2 hr
May 1, 4:37 AM CDT	Areal Flood Warning	OHX	54 hr
May 1, 4:38 AM CDT	Flash Flood Warning	OHX	3 hr
May 1, 4:18 PM CDT	River Flood Warning	OHX	24 hr
May 2, 10:17 PM CDT	Flash Flood Warning	OHX	12 hr
May 3, 8:40 AM CDT	River Flood Advisory	OHX	3 hr
May 3, 10:50 AM CDT	Areal Flood Warning	OHX	48 hr
May 3, 11:16 AM CDT	River Flood Warning	OHX	23 hr
May 3, 11:16 AM CDT	River Flood Warning	OHX	33 hr
May 4, 4:03 AM CDT	Frost Advisory	OHX	27 hr
May 4, 10:29 AM CDT	River Flood Advisory	OHX	8 days
May 5, 10:49 AM CDT	Areal Flood Warning	OHX	48 hr
May 5, 10:52 AM CDT	Areal Flood Warning	OHX	6 days
May 11, 10:40 AM CDT	Areal Flood Advisory	OHX	24 hr
May 12, 2:47 PM CDT	Severe Thunderstorm Warning	OHX	28 min
May 12, 2:51 PM CDT	Mesoscale Discussion	SPC	114 min
May 12, 3:19 PM CDT	Severe Thunderstorm Warning	OHX	26 min
May 13, 5:03 PM CDT	Mesoscale Discussion	SPC	57 min
May 13, 5:32 PM CDT	Severe Thunderstorm Warning	OHX	28 min
May 13, 5:54 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 23, 4:24 PM CDT	Mesoscale Discussion	SPC	96 min
May 23, 4:57 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
May 23, 6:37 PM CDT	Severe Thunderstorm Warning	OHX	23 min
May 23, 6:50 PM CDT	Tornado Warning	OHX	25 min
May 23, 7:47 PM CDT	Mesoscale Discussion	SPC	58 min
May 25, 10:18 AM CDT	Mesoscale Discussion	SPC	57 min
May 25, 11:02 AM CDT	Mesoscale Discussion	SPC	28 min
May 25, 3:45 PM CDT	Mesoscale Discussion	SPC	90 min
May 25, 7:22 PM CDT	Mesoscale Discussion	SPC	53 min
May 25, 8:33 PM CDT	Tornado Watch	SPC	7 hr
May 25, 9:55 PM CDT	Severe Thunderstorm Warning	OHX	35 min
May 25, 10:27 PM CDT	Severe Thunderstorm Warning	OHX	33 min
Jun 5, 10:47 AM CDT	Mesoscale Discussion	SPC	88 min
Jun 5, 12:02 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 5, 2:55 PM CDT	Mesoscale Discussion	SPC	65 min
Jun 6, 3:48 AM CDT	Dense Fog Advisory	OHX	4 hr
Jun 11, 10:07 PM CDT	Severe Thunderstorm Warning	OHX	38 min
Jun 15, 10:54 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 15, 2:13 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 15, 2:27 PM CDT	Severe Thunderstorm Warning	OHX	33 min
Jun 15, 2:57 PM CDT	Severe Thunderstorm Warning	OHX	63 min
Jun 16, 8:22 PM CDT	Mesoscale Discussion	SPC	53 min
Jun 19, 2:14 AM CDT	Mesoscale Discussion	SPC	61 min
Jun 19, 4:39 AM CDT	Mesoscale Discussion	SPC	66 min
Jun 19, 4:30 PM CDT	Mesoscale Discussion	SPC	30 min
Jun 19, 5:01 PM CDT	Tornado Watch	SPC	5 hr
Jun 19, 6:18 PM CDT	Mesoscale Discussion	SPC	57 min
Jun 22, 3:43 PM CDT	Mesoscale Discussion	SPC	92 min
Jun 23, 12:37 PM CDT	Tornado Watch	SPC	7 hr
Jun 25, 2:59 PM CDT	Mesoscale Discussion	SPC	91 min
Jun 26, 1:21 AM CDT	Mesoscale Discussion	SPC	84 min
Jun 26, 4:14 AM CDT	Mesoscale Discussion	SPC	91 min
Jun 27, 11:30 AM CDT	Mesoscale Discussion	SPC	90 min
Jun 27, 12:01 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 27, 2:20 PM CDT	Mesoscale Discussion	SPC	55 min
Jun 28, 2:43 AM CDT	Special Weather Statement	OHX	62 min
Jun 28, 3:01 AM CDT	Severe Thunderstorm Warning	OHX	44 min
Jun 28, 3:17 AM CDT	Severe Thunderstorm Warning	OHX	58 min
Jul 10, 3:02 PM CDT	Excessive Heat Warning	OHX	52 hr
Jul 12, 7:04 PM CDT	Mesoscale Discussion	SPC	86 min
Jul 19, 3:11 PM CDT	Heat Advisory	OHX	70 hr
Jul 24, 4:55 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 2, 3:17 PM CDT	Heat Advisory	OHX	44 hr
Aug 3, 12:26 PM CDT	Mesoscale Discussion	SPC	64 min
Aug 3, 12:35 PM CDT	Excessive Heat Warning	OHX	6 hr
Aug 3, 6:43 PM CDT	Mesoscale Discussion	SPC	62 min
Aug 5, 9:32 AM CDT	Special Weather Statement	OHX	28 min
Aug 5, 10:03 AM CDT	Special Weather Statement	OHX	27 min
Aug 7, 9:18 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Aug 7, 10:54 PM CDT	Mesoscale Discussion	SPC	96 min
Aug 18, 3:16 PM CDT	Severe Thunderstorm Warning	OHX	29 min
Aug 18, 4:38 PM CDT	Special Weather Statement	OHX	52 min
Aug 21, 2:25 AM CDT	Severe Thunderstorm Warning	OHX	50 min
Sep 3, 11:32 PM CDT	Special Weather Statement	OHX	28 min
Sep 3, 11:34 PM CDT	Severe Thunderstorm Warning	OHX	26 min
Sep 4, 5:52 PM CDT	Flash Flood Warning	OHX	3 hr
Sep 10, 6:31 PM CDT	Special Weather Statement	OHX	14 min
Sep 11, 3:48 PM CDT	Special Weather Statement	OHX	57 min
Sep 11, 3:51 PM CDT	Severe Thunderstorm Warning	OHX	33 min
Sep 14, 7:04 PM CDT	Severe Thunderstorm Warning	OHX	41 min
Sep 14, 7:43 PM CDT	Severe Thunderstorm Warning	OHX	47 min
Sep 25, 3:46 PM CDT	Severe Thunderstorm Warning	OHX	29 min
Sep 25, 7:49 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 26, 12:45 AM CDT	Mesoscale Discussion	SPC	3 hr
Oct 1, 2:13 PM CDT	Frost Advisory	OHX	18 hr
Oct 2, 5:18 PM CDT	Frost Advisory	OHX	15 hr
Oct 12, 5:04 AM CDT	Dense Fog Advisory	OHX	4 hr
Oct 20, 3:46 AM CDT	Freeze Warning	OHX	24 hr
Oct 21, 3:39 AM CDT	Frost Advisory	OHX	4 hr
Oct 21, 3:39 AM CDT	Freeze Warning	OHX	28 hr
Oct 28, 3:16 PM CDT	Freeze Warning	OHX	18 hr
Oct 28, 3:16 PM CDT	Freeze Warning	OHX	42 hr
Oct 29, 1:13 AM CDT	Dense Fog Advisory	OHX	8 hr
Nov 5, 2:44 AM CDT	Dense Fog Advisory	OHX	7 hr
Nov 12, 3:28 PM CST	Wind Advisory	OHX	26 hr
Dec 2, 3:06 AM CST	Freezing Fog Advisory	OHX	6 hr
Dec 4, 3:05 AM CST	Flood Watch	OHX	39 hr
Dec 5, 2:42 PM CST	Areal Flood Advisory	OHX	6 hr
Dec 6, 4:30 AM CST	River Flood Advisory	OHX	24 hr
Dec 13, 11:39 PM CST	Dense Fog Advisory	OHX	9 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	34
Tornado Warning	12
Severe Thunderstorm Watch	9
Tornado Watch	17
Mesoscale Discussion	50
Special Weather Statement	7
Flooding
Areal Flood Warning	6
Flash Flood Warning	9
River Flood Warning	7
Flash Flood Watch	4
Flood Watch	2
River Flood Watch	3
Areal Flood Advisory	4
River Flood Advisory	8
Winter
Winter Storm Warning	4
Winter Storm Watch	2
Winter Weather Advisory	6
Heat
Excessive Heat Warning	2
Heat Advisory	2
Cold
Freeze Warning	4
Frost Advisory	4
Wind and dust
Wind Advisory	7
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 2010 2012

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.