Alert archive / Tennessee / Perry County

Weather alerts in Perry County, Tennessee, 2010

172 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Perry County and its neighbors

Each county as a circle sized by its count in 2010. Tap one for its archive.

Alerts: 172
Warnings: 53
Watches: 36
Advisories: 38
Busiest month: May51 alerts
Busiest day: May 1, 201012 alerts

Over time

By month

Warning verification

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

4 of 8 tornado warnings covering Perry County in 2010 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 24 minutes after it went out.

Perry County, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	8	4	50%	2	100%	24 min
Severe thunderstorm warnings	24	2	92%	4	25%	3 min
Flash flood warnings	6	2	67%	0

Each office's whole area, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Nashville, TN: tornado warnings	65	11	83%	16	63%	13 min
NWS Nashville, TN: severe thunderstorm warnings	375	124	67%	240	65%	16 min
NWS Nashville, TN: flash flood warnings	44	13	70%	31	58%	115 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, 9:43 AM CST	Winter Storm Watch	OHX	17 hr
Jan 6, 3:06 AM CST	Winter Weather Advisory	OHX	39 hr
Jan 7, 3:52 AM CST	Wind Chill Advisory	OHX	29 hr
Jan 17, 10:09 PM CST	Dense Fog Advisory	OHX	12 hr
Jan 21, 9:55 AM CST	Mesoscale Discussion	SPC	65 min
Jan 21, 12:01 PM CST	Tornado Watch	SPC	3 hr
Jan 21, 3:16 PM CST	Severe Thunderstorm Watch	SPC	6 hr
Jan 22, 11:16 AM CST	River Flood Advisory	OHX	18 hr
Jan 23, 4:24 AM CST	Dense Fog Advisory	OHX	5 hr
Jan 23, 4:24 AM CST	Wind Advisory	OHX	26 hr
Jan 25, 9:31 AM CST	River Flood Advisory	OHX	22 days
Jan 27, 1:26 PM CST	Winter Storm Watch	OHX	26 hr
Jan 28, 3:36 PM CST	Winter Storm Warning	OHX	44 hr
Jan 28, 3:36 PM CST	Winter Weather Advisory	OHX	13 hr
Jan 28, 10:54 PM CST	Mesoscale Discussion	SPC	5 hr
Jan 29, 10:45 AM CST	Mesoscale Discussion	SPC	4 hr
Feb 1, 3:18 AM CST	Freezing Fog Advisory	OHX	5 hr
Feb 5, 8:00 PM CST	River Flood Advisory	OHX	46 hr
Feb 8, 3:16 AM CST	Winter Weather Advisory	OHX	19 hr
Feb 8, 9:06 AM CST	River Flood Warning	MEG	5 days
Feb 8, 6:23 PM CST	Winter Weather Advisory	OHX	4 hr
Feb 10, 10:08 AM CST	River Flood Advisory	OHX	22 hr
Feb 13, 4:53 AM CST	Winter Weather Advisory	OHX	59 hr
Mar 11, 3:24 AM CST	Severe Thunderstorm Warning	OHX	66 min
Mar 25, 1:14 PM CDT	Mesoscale Discussion	SPC	61 min
Mar 25, 1:49 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Mar 25, 4:50 PM CDT	Mesoscale Discussion	SPC	85 min
Mar 30, 12:09 PM CDT	Fire Weather Watch	OHX	30 hr
Mar 31, 7:32 AM CDT	Fire Weather Watch	OHX	35 hr
Mar 31, 7:32 AM CDT	Red Flag Warning	OHX	11 hr
Mar 31, 10:15 PM CDT	Fire Weather Watch	OHX	21 hr
Apr 1, 5:28 AM CDT	Fire Weather Watch	OHX	14 hr
Apr 3, 2:59 AM CDT	Mesoscale Discussion	SPC	91 min
Apr 3, 5:04 AM CDT	Mesoscale Discussion	SPC	56 min
Apr 7, 7:31 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 7, 10:16 PM CDT	Mesoscale Discussion	SPC	119 min
Apr 7, 10:32 PM CDT	Severe Thunderstorm Warning	OHX	28 min
Apr 9, 3:25 PM CDT	Frost Advisory	OHX	16 hr
Apr 23, 6:31 PM CDT	Mesoscale Discussion	SPC	29 min
Apr 23, 6:51 PM CDT	Tornado Watch	SPC	8 hr
Apr 23, 11:40 PM CDT	Mesoscale Discussion	SPC	65 min
Apr 24, 8:01 AM CDT	Tornado Watch PDS	SPC	5 hr
Apr 24, 9:31 AM CDT	Mesoscale Discussion	SPC	59 min
Apr 24, 10:30 AM CDT	Severe Thunderstorm Warning	OHX	60 min
Apr 24, 1:17 PM CDT	Tornado Watch PDS	SPC	8 hr
Apr 24, 2:01 PM CDT	Mesoscale Discussion	SPC	89 min
Apr 24, 4:28 PM CDT	Tornado Warning	OHX	32 min
Apr 24, 4:54 PM CDT	Tornado Warning	OHX	36 min
Apr 24, 5:48 PM CDT	Tornado Warning	OHX	27 min
Apr 24, 5:48 PM CDT	Mesoscale Discussion	SPC	57 min
Apr 24, 6:15 PM CDT	Tornado Watch	SPC	8 hr
Apr 25, 1:29 PM CDT	River Flood Advisory	OHX	15 hr
Apr 30, 3:26 PM CDT	Flash Flood Watch	OHX	29 hr
May 1, 2:25 AM CDT	Mesoscale Discussion	SPC	95 min
May 1, 3:11 AM CDT	Tornado Watch	SPC	8 hr
May 1, 4:02 AM CDT	Severe Thunderstorm Warning	OHX	58 min
May 1, 6:17 AM CDT	Mesoscale Discussion	SPC	88 min
May 1, 8:21 AM CDT	Flash Flood Warning	OHX	8 hr
May 1, 9:52 AM CDT	Tornado Watch	SPC	8 hr
May 1, 11:02 AM CDT	River Flood Watch	OHX	4 hr
May 1, 11:19 AM CDT	Mesoscale Discussion	SPC	56 min
May 1, 2:54 PM CDT	Mesoscale Discussion	SPC	66 min
May 1, 3:10 PM CDT	River Flood Warning	OHX	4 days
May 1, 3:17 PM CDT	Areal Flood Warning	OHX	24 hr
May 1, 5:35 PM CDT	Areal Flood Warning	OHX	24 hr
May 1, 9:48 PM CDT	Tornado Warning	OHX	27 min
May 1, 10:22 PM CDT	Tornado Watch	SPC	5 hr
May 2, 2:33 AM CDT	Mesoscale Discussion	SPC	87 min
May 2, 3:36 AM CDT	Tornado Watch PDS	SPC	8 hr
May 2, 4:28 AM CDT	Tornado Warning	OHX	32 min
May 2, 4:46 AM CDT	Tornado Warning	OHX	29 min
May 2, 6:37 AM CDT	Mesoscale Discussion	SPC	113 min
May 2, 8:25 AM CDT	River Flood Warning	MEG	11 days
May 2, 9:21 AM CDT	Severe Thunderstorm Warning	OHX	24 min
May 2, 9:35 AM CDT	Severe Thunderstorm Warning	OHX	10 min
May 2, 11:15 AM CDT	Mesoscale Discussion	SPC	60 min
May 2, 5:27 PM CDT	Areal Flood Warning	OHX	24 hr
May 2, 11:57 PM CDT	Dense Fog Advisory	OHX	8 hr
May 3, 7:37 AM CDT	River Flood Warning	OHX	4 days
May 3, 6:00 PM CDT	Areal Flood Warning	OHX	23 hr
May 7, 3:16 AM CDT	Wind Advisory	OHX	15 hr
May 7, 7:32 AM CDT	River Flood Advisory	OHX	7 days
May 7, 10:59 AM CDT	River Flood Advisory	MEG	11 hr
May 13, 8:59 AM CDT	River Flood Advisory	MEG	4 days
May 14, 11:15 AM CDT	Mesoscale Discussion	SPC	60 min
May 14, 11:34 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 14, 12:40 PM CDT	Severe Thunderstorm Warning	OHX	35 min
May 14, 1:09 PM CDT	Flash Flood Watch	OHX	6 hr
May 14, 1:13 PM CDT	Flash Flood Warning	OHX	3 hr
May 14, 1:20 PM CDT	Severe Thunderstorm Warning	OHX	40 min
May 14, 2:18 PM CDT	Mesoscale Discussion	SPC	87 min
May 14, 2:58 PM CDT	Severe Thunderstorm Warning	OHX	32 min
May 14, 4:04 PM CDT	Severe Thunderstorm Warning	OHX	26 min
May 14, 4:25 PM CDT	Severe Thunderstorm Warning	OHX	50 min
May 14, 4:49 PM CDT	Severe Thunderstorm Warning	OHX	26 min
May 15, 1:09 PM CDT	Mesoscale Discussion	SPC	2 hr
May 15, 2:47 PM CDT	Flash Flood Watch	OHX	28 hr
May 17, 5:05 PM CDT	Mesoscale Discussion	SPC	85 min
May 17, 5:12 PM CDT	Severe Thunderstorm Warning	OHX	33 min
May 17, 6:51 PM CDT	Severe Thunderstorm Warning	OHX	39 min
May 20, 12:34 PM CDT	Flash Flood Watch	OHX	18 hr
May 20, 12:44 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
May 20, 3:27 PM CDT	Flash Flood Warning	OHX	2 hr
May 30, 3:30 PM CDT	Flash Flood Warning	OHX	3 hr
Jun 2, 4:54 PM CDT	Mesoscale Discussion	SPC	66 min
Jun 3, 2:12 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 3, 5:20 PM CDT	Mesoscale Discussion	SPC	55 min
Jun 9, 5:25 PM CDT	Severe Thunderstorm Warning	OHX	35 min
Jun 13, 3:52 AM CDT	Heat Advisory	OHX	15 hr
Jun 15, 12:11 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 17, 9:37 AM CDT	Mesoscale Discussion	SPC	113 min
Jun 17, 11:25 AM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 17, 2:53 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 17, 3:01 PM CDT	Severe Thunderstorm Warning	OHX	44 min
Jun 17, 4:39 PM CDT	Mesoscale Discussion	SPC	66 min
Jun 25, 3:54 PM CDT	Severe Thunderstorm Warning	OHX	36 min
Jun 26, 6:32 PM CDT	Severe Thunderstorm Warning	OHX	28 min
Jul 11, 6:04 PM CDT	Mesoscale Discussion	SPC	56 min
Jul 12, 2:00 PM CDT	Flash Flood Watch	OHX	20 hr
Jul 12, 5:53 PM CDT	Mesoscale Discussion	SPC	67 min
Jul 15, 4:49 AM CDT	Heat Advisory	OHX	14 hr
Jul 22, 3:47 PM CDT	Heat Advisory	OHX	51 hr
Jul 31, 1:33 PM CDT	Mesoscale Discussion	SPC	27 min
Jul 31, 1:49 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 31, 3:46 PM CDT	Mesoscale Discussion	SPC	59 min
Jul 31, 6:17 PM CDT	Mesoscale Discussion	SPC	58 min
Jul 31, 8:11 PM CDT	Mesoscale Discussion	SPC	34 min
Aug 2, 2:57 AM CDT	Heat Advisory	OHX	16 hr
Aug 2, 1:30 PM CDT	Heat Advisory	OHX	3 days
Aug 4, 2:50 AM CDT	Excessive Heat Warning	OHX	38 hr
Aug 5, 12:47 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Aug 5, 4:37 PM CDT	Severe Thunderstorm Warning	OHX	40 min
Aug 5, 4:52 PM CDT	Mesoscale Discussion	SPC	53 min
Aug 5, 5:06 PM CDT	Severe Thunderstorm Warning	OHX	30 min
Aug 5, 5:13 PM CDT	Severe Thunderstorm Warning	OHX	16 min
Aug 9, 3:57 AM CDT	Heat Advisory	OHX	12 hr
Aug 9, 3:57 AM CDT	Heat Advisory	OHX	7 days
Aug 12, 4:50 PM CDT	Severe Thunderstorm Warning	OHX	40 min
Aug 14, 3:23 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 14, 6:04 PM CDT	Mesoscale Discussion	SPC	86 min
Aug 15, 1:14 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 15, 5:06 PM CDT	Severe Thunderstorm Warning	OHX	24 min
Aug 18, 7:39 AM CDT	Flash Flood Watch	OHX	14 hr
Aug 18, 1:01 PM CDT	Flash Flood Warning	OHX	8 hr
Aug 21, 12:54 PM CDT	Mesoscale Discussion	SPC	96 min
Oct 3, 4:50 PM CDT	Frost Advisory	OHX	14 hr
Oct 4, 3:30 AM CDT	Frost Advisory	OHX	29 hr
Oct 4, 3:31 PM CDT	Freeze Warning	OHX	16 hr
Oct 5, 3:47 AM CDT	Frost Advisory	OHX	27 hr
Oct 12, 5:18 PM CDT	Severe Thunderstorm Warning	OHX	20 min
Oct 12, 6:26 PM CDT	Flash Flood Warning	OHX	3 hr
Oct 25, 4:02 PM CDT	Wind Advisory	OHX	24 hr
Oct 26, 3:38 AM CDT	Mesoscale Discussion	SPC	2 hr
Oct 26, 4:05 AM CDT	Tornado Watch	SPC	8 hr
Oct 26, 6:00 AM CDT	Mesoscale Discussion	SPC	2 hr
Oct 26, 8:54 AM CDT	Mesoscale Discussion	SPC	66 min
Oct 26, 9:27 AM CDT	Tornado Watch PDS	SPC	11 hr
Oct 26, 10:18 AM CDT	Tornado Warning	OHX	27 min
Oct 26, 10:40 AM CDT	Tornado Warning	OHX	35 min
Oct 28, 3:07 AM CDT	Freeze Watch	OHX	35 hr
Oct 29, 1:49 PM CDT	Freeze Warning	OHX	18 hr
Nov 4, 3:45 AM CDT	Freeze Watch	OHX	24 hr
Nov 5, 3:20 AM CDT	Freeze Warning	OHX	30 hr
Nov 6, 4:02 AM CDT	Freeze Warning	OHX	29 hr
Nov 20, 3:27 AM CST	Dense Fog Advisory	OHX	5 hr
Nov 25, 2:47 AM CST	Wind Advisory	OHX	15 hr
Nov 25, 3:36 PM CST	Mesoscale Discussion	SPC	84 min
Dec 11, 4:07 AM CST	Winter Weather Advisory	OHX	54 hr
Dec 12, 3:49 AM CST	Wind Chill Advisory	OHX	32 hr
Dec 14, 4:41 AM CST	Winter Weather Advisory	OHX	49 hr
Dec 24, 4:10 AM CST	Winter Weather Advisory	OHX	67 hr
Dec 31, 5:35 PM CST	Mesoscale Discussion	SPC	115 min

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	24
Tornado Warning	8
Severe Thunderstorm Watch	10
Tornado Watch	11
Mesoscale Discussion	45
Flooding
Areal Flood Warning	4
Flash Flood Warning	6
River Flood Warning	4
Flash Flood Watch	6
River Flood Watch	1
River Flood Advisory	8
Winter
Winter Storm Warning	1
Winter Storm Watch	2
Winter Weather Advisory	8
Heat
Excessive Heat Warning	1
Heat Advisory	7
Cold
Freeze Warning	4
Freeze Watch	2
Frost Advisory	4
Wind Chill Advisory	2
Wind and dust
Wind Advisory	4
Fire
Red Flag Warning	1
Fire Weather Watch	4
Fog and smoke
Dense Fog Advisory	4
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 2009 2011

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.