Weather alerts in Dyer County, Tennessee, 2009

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

Dyer County and its neighbors

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

Alerts: 222
Warnings: 83
Watches: 37
Advisories: 47
Busiest month: May52 alerts
Busiest day: June 15, 200913 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 Dyer County in 2009 had a tornado report inside them; 4 of 4 tornado reports fell inside a warning, on average 32 minutes after it went out.

Dyer County, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	8	4	50%	4	100%	32 min
Severe thunderstorm warnings	35	16	54%	4	50%	35 min
Flash flood warnings	17	12	29%	2	100%	98 min

Each office's whole area, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Memphis, TN: tornado warnings	69	19	72%	51	65%	19 min
NWS Memphis, TN: severe thunderstorm warnings	439	207	53%	423	82%	24 min
NWS Memphis, TN: flash flood warnings	235	126	46%	204	92%	94 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, 8:50 AM CST	Winter Weather Advisory	MEG	7 hr
Jan 5, 3:30 PM CST	Winter Weather Advisory	MEG	20 hr
Jan 5, 6:51 PM CST	Ice Storm Warning	MEG	9 hr
Jan 14, 4:30 AM CST	Wind Chill Advisory	MEG	30 hr
Jan 15, 4:48 AM CST	Wind Chill Advisory	MEG	28 hr
Jan 26, 4:19 AM CST	Ice Storm Warning	MEG	48 hr
Jan 26, 6:59 PM CST	Mesoscale Discussion	SPC	5 hr
Jan 26, 11:44 PM CST	Mesoscale Discussion	SPC	5 hr
Jan 27, 6:06 AM CST	Mesoscale Discussion	SPC	5 hr
Jan 27, 6:25 PM CST	Mesoscale Discussion	SPC	6 hr
Jan 27, 11:31 PM CST	Mesoscale Discussion	SPC	5 hr
Jan 28, 4:32 AM CST	Winter Weather Advisory	MEG	5 hr
Jan 28, 6:50 AM CST	River Flood Warning	MEG	6 hr
Jan 30, 1:47 PM CST	River Flood Warning	MEG	42 hr
Jan 31, 6:11 AM CST	Freezing Fog Advisory	MEG	5 hr
Feb 3, 3:37 PM CST	Wind Chill Advisory	MEG	18 hr
Feb 8, 3:10 PM CST	Wind Advisory	MEG	27 hr
Feb 10, 3:31 AM CST	Wind Advisory	MEG	39 hr
Feb 10, 3:25 PM CST	High Wind Warning	MEG	24 hr
Feb 10, 3:25 PM CST	Wind Advisory	MEG	28 hr
Feb 10, 11:45 PM CST	Tornado Watch	SPC	6 hr
Feb 11, 2:30 AM CST	Mesoscale Discussion	SPC	90 min
Feb 11, 5:26 AM CST	Mesoscale Discussion	SPC	64 min
Feb 17, 9:45 PM CST	Mesoscale Discussion	SPC	2 hr
Feb 26, 9:09 PM CST	Mesoscale Discussion	SPC	96 min
Feb 26, 9:40 PM CST	Severe Thunderstorm Watch	SPC	5 hr
Feb 27, 9:33 PM CST	Winter Storm Watch	MEG	6 hr
Feb 28, 3:59 AM CST	Winter Storm Warning	MEG	28 hr
Feb 28, 11:47 AM CST	Mesoscale Discussion	SPC	4 hr
Feb 28, 3:57 PM CST	Mesoscale Discussion	SPC	4 hr
Mar 5, 11:51 AM CST	Wind Advisory	MEG	7 hr
Mar 6, 10:33 AM CST	Wind Advisory	MEG	7 hr
Mar 7, 9:11 AM CST	Wind Advisory	MEG	10 hr
Mar 8, 3:41 AM CDT	Wind Advisory	MEG	15 hr
Mar 10, 3:23 AM CDT	Wind Advisory	MEG	15 hr
Mar 10, 7:31 PM CDT	Mesoscale Discussion	SPC	119 min
Mar 11, 3:53 AM CDT	Winter Weather Advisory	MEG	42 hr
Mar 16, 9:39 PM CDT	Dense Fog Advisory	MEG	12 hr
Mar 17, 11:27 PM CDT	Dense Fog Advisory	MEG	10 hr
Mar 23, 3:37 PM CDT	Wind Advisory	MEG	28 hr
Mar 24, 5:36 PM CDT	Mesoscale Discussion	SPC	54 min
Mar 28, 4:08 AM CDT	Wind Advisory	MEG	16 hr
Mar 29, 4:41 AM CDT	Frost Advisory	MEG	28 hr
Apr 2, 3:05 PM CDT	Wind Advisory	MEG	10 hr
Apr 2, 5:36 PM CDT	Mesoscale Discussion	SPC	84 min
Apr 2, 6:21 PM CDT	Tornado Watch	SPC	3 hr
Apr 2, 6:32 PM CDT	Severe Thunderstorm Warning	MEG	43 min
Apr 5, 4:05 AM CDT	Freeze Watch	MEG	24 hr
Apr 5, 4:05 AM CDT	Wind Advisory	MEG	24 hr
Apr 5, 10:50 AM CDT	Mesoscale Discussion	SPC	115 min
Apr 5, 2:02 PM CDT	Mesoscale Discussion	SPC	88 min
Apr 6, 3:52 AM CDT	Freeze Warning	MEG	27 hr
Apr 7, 3:58 AM CDT	Freeze Warning	MEG	27 hr
Apr 9, 10:48 PM CDT	Tornado Watch	SPC	4 hr
Apr 9, 11:58 PM CDT	Severe Thunderstorm Warning	MEG	47 min
Apr 10, 12:43 AM CDT	Severe Thunderstorm Warning	MEG	49 min
Apr 10, 1:10 AM CDT	Severe Thunderstorm Warning	MEG	28 min
Apr 10, 8:53 AM CDT	Tornado Watch	SPC	7 hr
Apr 10, 1:13 PM CDT	Wind Advisory	MEG	6 hr
Apr 19, 12:14 PM CDT	Mesoscale Discussion	SPC	61 min
Apr 19, 1:17 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 19, 2:22 PM CDT	Mesoscale Discussion	SPC	53 min
Apr 19, 3:49 PM CDT	Mesoscale Discussion	SPC	56 min
Apr 28, 7:34 AM CDT	Areal Flood Advisory	MEG	3 hr
Apr 30, 3:34 PM CDT	Mesoscale Discussion	SPC	86 min
Apr 30, 5:02 PM CDT	Severe Thunderstorm Warning	MEG	43 min
Apr 30, 5:10 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 1, 10:27 AM CDT	Flash Flood Warning	MEG	2 hr
May 1, 12:26 PM CDT	Flash Flood Warning	MEG	2 hr
May 1, 2:24 PM CDT	Flash Flood Warning	MEG	3 hr
May 1, 3:21 PM CDT	Mesoscale Discussion	SPC	54 min
May 1, 3:36 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 1, 3:40 PM CDT	Flash Flood Watch	MEG	55 hr
May 1, 5:23 PM CDT	Flash Flood Warning	MEG	3 hr
May 1, 6:11 PM CDT	Mesoscale Discussion	SPC	64 min
May 1, 8:30 PM CDT	River Flood Warning	MEG	12 days
May 2, 11:38 AM CDT	River Flood Warning	MEG	25 days
May 4, 8:50 PM CDT	River Flood Warning	MEG	20 days
May 5, 4:13 AM CDT	Flash Flood Watch	MEG	35 hr
May 6, 10:15 AM CDT	River Flood Warning	MEG	8 days
May 6, 10:15 AM CDT	River Flood Warning	MEG	11 hr
May 7, 5:18 AM CDT	Dense Fog Advisory	MEG	4 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, 2:16 PM CDT	Mesoscale Discussion	SPC	89 min
May 8, 3:24 PM CDT	Mesoscale Discussion	SPC	66 min
May 8, 3:42 PM CDT	Tornado Watch	SPC	7 hr
May 8, 5:03 PM CDT	Severe Thunderstorm Warning	MEG	27 min
May 8, 5:29 PM CDT	Severe Thunderstorm Warning	MEG	46 min
May 8, 7:30 PM CDT	Mesoscale Discussion	SPC	90 min
May 8, 8:29 PM CDT	Flash Flood Watch	MEG	47 hr
May 8, 10:04 PM CDT	Mesoscale Discussion	SPC	86 min
May 8, 10:31 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 9, 12:13 AM CDT	Severe Thunderstorm Warning	MEG	47 min
May 9, 12:45 AM CDT	Severe Thunderstorm Warning	MEG	45 min
May 9, 1:11 AM CDT	Flash Flood Warning	MEG	6 hr
May 9, 1:16 AM CDT	Severe Thunderstorm Warning	MEG	44 min
May 9, 2:05 AM CDT	Severe Thunderstorm Warning	MEG	25 min
May 9, 2:22 AM CDT	Mesoscale Discussion	SPC	53 min
May 9, 2:26 AM CDT	Flash Flood Warning	MEG	6 hr
May 9, 6:11 AM CDT	River Flood Warning	MEG	27 hr
May 10, 9:20 AM CDT	River Flood Warning	MEG	4 days
May 13, 11:27 PM CDT	Mesoscale Discussion	SPC	93 min
May 14, 1:01 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 14, 3:16 AM CDT	Severe Thunderstorm Warning	MEG	44 min
May 14, 3:56 AM CDT	Mesoscale Discussion	SPC	64 min
May 15, 4:03 PM CDT	Flash Flood Watch	MEG	27 hr
May 24, 4:43 PM CDT	Tornado Warning	MEG	47 min
May 24, 5:26 PM CDT	Tornado Warning	MEG	49 min
May 24, 5:49 PM CDT	Tornado Warning	MEG	41 min
May 24, 6:32 PM CDT	Tornado Warning	MEG	43 min
May 24, 6:34 PM CDT	Tornado Warning	MEG	26 min
May 24, 6:43 PM CDT	Flash Flood Warning	MEG	3 hr
May 24, 8:12 PM CDT	Tornado Warning	MEG	48 min
May 24, 9:26 PM CDT	Flash Flood Warning	MEG	3 hr
May 24, 9:49 PM CDT	River Flood Warning	MEG	23 hr
May 24, 10:52 PM CDT	Flash Flood Warning	MEG	3 hr
May 27, 1:49 PM CDT	Mesoscale Discussion	SPC	116 min
May 27, 8:56 PM CDT	Severe Thunderstorm Warning	MEG	33 min
Jun 3, 5:27 PM CDT	Severe Thunderstorm Warning	MEG	63 min
Jun 3, 6:35 PM CDT	Areal Flood Advisory	MEG	3 hr
Jun 10, 1:12 AM CDT	Mesoscale Discussion	SPC	33 min
Jun 10, 5:20 AM CDT	Mesoscale Discussion	SPC	55 min
Jun 10, 9:04 AM CDT	Mesoscale Discussion	SPC	86 min
Jun 11, 2:38 AM CDT	Mesoscale Discussion	SPC	67 min
Jun 11, 6:02 PM CDT	Mesoscale Discussion	SPC	58 min
Jun 11, 11:34 PM CDT	Flash Flood Warning	MEG	68 min
Jun 15, 9:59 AM CDT	Mesoscale Discussion	SPC	31 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, 2:42 PM CDT	Tornado Warning	MEG	48 min
Jun 15, 2:48 PM CDT	Tornado Watch	SPC	3 hr
Jun 15, 2:53 PM CDT	Tornado Warning	MEG	52 min
Jun 15, 3:52 PM CDT	Mesoscale Discussion	SPC	53 min
Jun 15, 3:56 PM CDT	Severe Thunderstorm Warning	MEG	49 min
Jun 15, 4:08 PM CDT	Flash Flood Warning	MEG	3 hr
Jun 15, 4:27 PM CDT	Severe Thunderstorm Warning	MEG	48 min
Jun 15, 4:42 PM CDT	Severe Thunderstorm Warning	MEG	48 min
Jun 15, 4:57 PM CDT	Mesoscale Discussion	SPC	63 min
Jun 15, 5:13 PM CDT	Severe Thunderstorm Warning	MEG	47 min
Jun 16, 9:38 AM CDT	Mesoscale Discussion	SPC	67 min
Jun 16, 10:40 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 16, 11:39 AM CDT	Severe Thunderstorm Warning	MEG	41 min
Jun 17, 3:12 PM CDT	Heat Advisory	MEG	5 days
Jun 23, 3:26 AM CDT	Heat Advisory	MEG	16 hr
Jun 26, 3:17 AM CDT	Heat Advisory	MEG	61 hr
Jun 26, 1:27 PM CDT	Severe Thunderstorm Warning	MEG	31 min
Jun 26, 2:34 PM CDT	Mesoscale Discussion	SPC	86 min
Jun 26, 3:54 PM CDT	Areal Flood Advisory	MEG	2 hr
Jun 26, 4:11 PM CDT	Severe Thunderstorm Warning	MEG	34 min
Jun 27, 3:36 AM CDT	Excessive Heat Warning	MEG	15 hr
Jul 4, 11:52 AM CDT	Mesoscale Discussion	SPC	53 min
Jul 4, 5:27 PM CDT	Mesoscale Discussion	SPC	63 min
Jul 4, 6:16 PM CDT	Severe Thunderstorm Warning	MEG	44 min
Jul 4, 7:32 PM CDT	Severe Thunderstorm Warning	MEG	43 min
Jul 11, 6:20 PM CDT	Mesoscale Discussion	SPC	115 min
Jul 13, 1:38 AM CDT	Severe Thunderstorm Warning	MEG	52 min
Jul 15, 3:40 AM CDT	Heat Advisory	MEG	15 hr
Jul 15, 5:36 PM CDT	Mesoscale Discussion	SPC	54 min
Jul 15, 6:03 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 15, 6:23 PM CDT	Severe Thunderstorm Warning	MEG	52 min
Jul 15, 6:30 PM CDT	Severe Thunderstorm Warning	MEG	45 min
Jul 15, 7:00 PM CDT	Severe Thunderstorm Warning	MEG	45 min
Jul 15, 7:02 PM CDT	Severe Thunderstorm Warning	MEG	58 min
Jul 15, 7:10 PM CDT	Severe Thunderstorm Warning	MEG	23 min
Jul 16, 4:59 PM CDT	Mesoscale Discussion	SPC	61 min
Jul 21, 10:06 AM CDT	Flash Flood Watch	MEG	17 hr
Jul 23, 3:17 AM CDT	Dense Fog Advisory	MEG	6 hr
Jul 26, 1:45 AM CDT	Severe Thunderstorm Warning	MEG	60 min
Jul 26, 2:03 AM CDT	Flash Flood Warning	MEG	3 hr
Jul 26, 2:25 AM CDT	Mesoscale Discussion	SPC	95 min
Jul 26, 2:37 AM CDT	Severe Thunderstorm Warning	MEG	53 min
Jul 26, 3:29 AM CDT	Severe Thunderstorm Warning	MEG	46 min
Jul 26, 4:07 AM CDT	Flash Flood Warning	MEG	78 min
Jul 29, 3:13 PM CDT	Flash Flood Watch	MEG	37 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, 5:31 PM CDT	Flash Flood Warning	MEG	3 hr
Jul 30, 9:30 PM CDT	River Flood Warning	MEG	10 hr
Aug 1, 7:33 AM CDT	Flash Flood Watch	MEG	14 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 4, 10:16 PM CDT	Severe Thunderstorm Warning	MEG	44 min
Aug 4, 11:00 PM CDT	Severe Thunderstorm Warning	MEG	45 min
Aug 4, 11:11 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Aug 5, 12:02 AM CDT	Severe Thunderstorm Warning	MEG	30 min
Aug 5, 11:40 PM CDT	Dense Fog Advisory	MEG	9 hr
Aug 12, 3:32 AM CDT	Dense Fog Advisory	MEG	4 hr
Aug 18, 5:26 PM CDT	Areal Flood Advisory	MEG	89 min
Aug 18, 6:32 PM CDT	Areal Flood Advisory	MEG	42 min
Sep 3, 6:02 AM CDT	Dense Fog Advisory	MEG	3 hr
Sep 15, 4:15 AM CDT	Flash Flood Watch	MEG	4 days
Sep 16, 12:09 PM CDT	Flash Flood Warning	MEG	3 hr
Sep 20, 11:14 AM CDT	Flash Flood Watch	MEG	8 hr
Sep 21, 9:58 PM CDT	Flash Flood Watch	MEG	26 hr
Sep 26, 3:30 PM CDT	Dense Fog Advisory	MEG	16 hr
Oct 7, 3:50 PM CDT	Flash Flood Watch	MEG	48 hr
Oct 8, 7:35 PM CDT	Mesoscale Discussion	SPC	55 min
Oct 8, 8:00 PM CDT	Tornado Watch	SPC	7 hr
Oct 8, 11:06 PM CDT	Mesoscale Discussion	SPC	84 min
Oct 9, 2:38 AM CDT	Mesoscale Discussion	SPC	52 min
Oct 9, 9:49 AM CDT	Flash Flood Warning	MEG	6 hr
Oct 15, 3:30 AM CDT	Dense Fog Advisory	MEG	3 hr
Oct 16, 8:58 PM CDT	Freeze Watch	MEG	19 hr
Oct 17, 3:40 PM CDT	Frost Advisory	MEG	17 hr
Oct 18, 3:56 AM CDT	Frost Advisory	MEG	29 hr
Oct 18, 3:33 PM CDT	Freeze Warning	MEG	17 hr
Oct 28, 3:48 AM CDT	Flash Flood Watch	MEG	63 hr
Oct 29, 10:16 PM CDT	River Flood Warning	MEG	36 hr
Oct 30, 2:03 AM CDT	Mesoscale Discussion	SPC	57 min
Oct 30, 2:36 AM CDT	Flash Flood Warning	MEG	12 hr
Oct 30, 11:01 AM CDT	River Flood Warning	MEG	5 days
Nov 5, 3:26 PM CST	Frost Advisory	MEG	15 hr
Nov 5, 3:26 PM CST	Freeze Warning	MEG	16 hr
Dec 8, 3:31 PM CST	Flash Flood Watch	MEG	8 hr
Dec 8, 8:01 PM CST	River Flood Warning	MEG	6 days
Dec 9, 5:53 AM CST	Wind Advisory	MEG	6 hr
Dec 21, 9:05 PM CST	Freezing Fog Advisory	MEG	11 hr
Dec 22, 8:19 AM CST	Freezing Fog Advisory	MEG	41 min
Dec 23, 3:32 PM CST	High Wind Watch	MEG	24 hr
Dec 23, 3:32 PM CST	Wind Advisory	MEG	44 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	35
Tornado Warning	8
Severe Thunderstorm Watch	11
Tornado Watch	9
Mesoscale Discussion	55
Flooding
Flash Flood Warning	17
River Flood Warning	14
Flash Flood Watch	13
Areal Flood Advisory	5
Winter
Ice Storm Warning	2
Winter Storm Warning	1
Winter Storm Watch	1
Winter Weather Advisory	4
Heat
Excessive Heat Warning	1
Heat Advisory	4
Cold
Freeze Warning	4
Freeze Watch	2
Frost Advisory	4
Wind Chill Advisory	3
Wind and dust
High Wind Warning	1
High Wind Watch	1
Wind Advisory	15
Fog and smoke
Dense Fog Advisory	9
Freezing Fog Advisory	3

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.