Weather alerts in Shelby County, Alabama, 2015

191 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Shelby County and its neighbors

Each county as a circle sized by its count in 2015. Tap one for its archive.

Alerts: 191
Warnings: 47
Watches: 21
Advisories: 55
Busiest month: July39 alerts
Busiest day: July 15, 20158 alerts

Over time

By month

Warning verification

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

Shelby County, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	18	11	39%	32	75%	22 min
Flash flood warnings	5	4	20%	3	100%	81 min

Each office's whole area, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Birmingham, AL: tornado warnings	20	10	50%	36	72%	6 min
NWS Birmingham, AL: severe thunderstorm warnings	162	97	40%	369	60%	19 min
NWS Birmingham, AL: flash flood warnings	36	25	31%	101	76%	141 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 3, 3:42 AM CST	Flash Flood Watch	BMX	24 hr
Jan 3, 3:18 PM CST	Tornado Watch	SPC	5 hr
Jan 3, 5:49 PM CST	Areal Flood Advisory	BMX	3 hr
Jan 3, 6:53 PM CST	Areal Flood Advisory	BMX	3 hr
Jan 3, 7:10 PM CST	Special Weather Statement	BMX	50 min
Jan 3, 7:54 PM CST	Mesoscale Discussion	SPC	66 min
Jan 3, 11:00 PM CST	Areal Flood Warning	BMX	3 hr
Jan 4, 2:00 AM CST	Areal Flood Advisory	BMX	3 hr
Jan 4, 8:05 AM CST	River Flood Warning	BMX	25 hr
Jan 4, 1:27 PM CST	River Flood Warning	BMX	21 hr
Jan 6, 4:06 AM CST	Hard Freeze Warning	BMX	53 hr
Jan 6, 2:35 PM CST	Fire Weather Watch	BMX	24 hr
Jan 6, 8:58 PM CST	Wind Advisory	BMX	24 hr
Jan 7, 4:15 AM CST	Wind Chill Advisory	BMX	29 hr
Jan 7, 2:07 PM CST	Red Flag Warning	BMX	28 hr
Jan 10, 3:24 PM CST	Red Flag Warning	BMX	96 min
Jan 12, 7:31 AM CST	Dense Fog Advisory	BMX	2 hr
Jan 23, 5:26 PM CST	Dense Fog Advisory	BMX	10 hr
Jan 25, 5:58 PM CST	Severe Thunderstorm Warning	BMX	62 min
Feb 1, 8:23 PM CST	Special Weather Statement	BMX	37 min
Feb 5, 2:43 PM CST	Fire Weather Watch	BMX	12 hr
Feb 6, 2:45 AM CST	Red Flag Warning	BMX	14 hr
Feb 6, 2:12 PM CST	Fire Weather Watch	BMX	20 hr
Feb 7, 4:12 AM CST	Red Flag Warning	BMX	14 hr
Feb 12, 4:02 AM CST	Fire Weather Watch	BMX	11 hr
Feb 12, 3:08 PM CST	Red Flag Warning	BMX	26 hr
Feb 14, 4:21 AM CST	Winter Storm Watch	BMX	35 hr
Feb 14, 4:26 AM CST	Fire Weather Watch	BMX	11 hr
Feb 14, 3:37 PM CST	Red Flag Warning	BMX	26 hr
Feb 16, 3:25 AM CST	Wind Advisory	BMX	7 hr
Feb 16, 1:46 PM CST	Mesoscale Discussion	SPC	2 hr
Feb 17, 3:50 PM CST	Hard Freeze Watch	BMX	10 hr
Feb 18, 1:25 AM CST	Hard Freeze Warning	BMX	33 hr
Feb 18, 3:05 AM CST	Wind Advisory	BMX	15 hr
Feb 18, 3:17 AM CST	Wind Chill Advisory	BMX	31 hr
Feb 18, 3:49 AM CST	Fire Weather Watch	BMX	17 hr
Feb 18, 3:49 AM CST	Red Flag Warning	BMX	9 hr
Feb 18, 9:14 PM CST	Red Flag Warning	BMX	21 hr
Feb 20, 3:34 AM CST	Winter Weather Advisory	BMX	23 hr
Feb 21, 12:39 PM CST	Wind Advisory	BMX	6 hr
Feb 23, 11:12 AM CST	Winter Weather Advisory	BMX	22 hr
Feb 23, 2:57 PM CST	Winter Storm Watch	BMX	23 hr
Feb 24, 1:42 PM CST	Winter Storm Warning	BMX	34 hr
Feb 24, 1:42 PM CST	Winter Weather Advisory	BMX	34 hr
Mar 2, 3:50 AM CST	Dense Fog Advisory	BMX	5 hr
Mar 2, 8:38 PM CST	Dense Fog Advisory	BMX	12 hr
Mar 4, 12:50 PM CST	Freezing Rain Advisory	BMX	24 hr
Mar 5, 1:22 PM CST	Winter Weather Advisory	BMX	4 hr
Mar 6, 3:46 PM CST	Red Flag Warning	BMX	26 hr
Mar 8, 3:26 AM CDT	Red Flag Warning	BMX	16 hr
Mar 11, 10:27 PM CDT	Dense Fog Advisory	BMX	11 hr
Mar 15, 3:33 PM CDT	Fire Weather Watch	BMX	21 hr
Mar 27, 2:35 PM CDT	Frost Advisory	BMX	18 hr
Mar 28, 4:05 AM CDT	Freeze Warning	BMX	29 hr
Mar 31, 12:47 PM CDT	Mesoscale Discussion	SPC	118 min
Mar 31, 1:22 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Mar 31, 3:41 PM CDT	Mesoscale Discussion	SPC	64 min
Mar 31, 6:00 PM CDT	Mesoscale Discussion	SPC	60 min
Mar 31, 6:32 PM CDT	Severe Thunderstorm Warning	BMX	58 min
Mar 31, 6:42 PM CDT	Severe Thunderstorm Warning	BMX	48 min
Mar 31, 8:08 PM CDT	Mesoscale Discussion	SPC	67 min
Apr 1, 8:01 AM CDT	Dense Fog Advisory	BMX	119 min
Apr 2, 12:58 PM CDT	Special Weather Statement	BMX	47 min
Apr 2, 1:57 PM CDT	Mesoscale Discussion	SPC	63 min
Apr 2, 2:54 PM CDT	Special Weather Statement	BMX	51 min
Apr 16, 1:14 PM CDT	Areal Flood Advisory	BMX	3 hr
Apr 19, 1:14 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 25, 2:10 PM CDT	Mesoscale Discussion	SPC	95 min
May 24, 4:58 PM CDT	Special Weather Statement	BMX	62 min
May 24, 5:40 PM CDT	Areal Flood Advisory	BMX	65 min
May 27, 5:28 PM CDT	Severe Thunderstorm Warning	BMX	32 min
May 31, 9:01 PM CDT	Special Weather Statement	BMX	29 min
May 31, 9:22 PM CDT	Areal Flood Advisory	BMX	53 min
Jun 2, 3:28 AM CDT	Dense Fog Advisory	BMX	6 hr
Jun 9, 8:01 PM CDT	Special Weather Statement	BMX	59 min
Jun 9, 8:29 PM CDT	Severe Thunderstorm Warning	BMX	46 min
Jun 9, 8:46 PM CDT	Areal Flood Advisory	BMX	119 min
Jun 9, 9:14 PM CDT	Special Weather Statement	BMX	46 min
Jun 13, 6:17 PM CDT	Special Weather Statement	BMX	43 min
Jun 13, 6:22 PM CDT	Severe Thunderstorm Warning	BMX	19 min
Jun 20, 3:23 PM CDT	Special Weather Statement	BMX	52 min
Jun 20, 4:39 PM CDT	Special Weather Statement	BMX	66 min
Jun 22, 4:43 PM CDT	Special Weather Statement	BMX	32 min
Jun 22, 4:46 PM CDT	Special Weather Statement	BMX	29 min
Jun 22, 5:18 PM CDT	Special Weather Statement	BMX	27 min
Jun 23, 5:03 AM CDT	Heat Advisory	BMX	33 hr
Jun 24, 8:53 PM CDT	Special Weather Statement	BMX	52 min
Jun 24, 9:03 PM CDT	Severe Thunderstorm Warning	BMX	42 min
Jun 24, 9:45 PM CDT	Severe Thunderstorm Warning	BMX	45 min
Jun 24, 10:25 PM CDT	Severe Thunderstorm Warning	BMX	35 min
Jun 25, 4:54 PM CDT	Special Weather Statement	BMX	36 min
Jun 30, 7:11 AM CDT	Special Weather Statement	BMX	49 min
Jun 30, 7:16 AM CDT	Severe Thunderstorm Warning	BMX	44 min
Jun 30, 7:47 AM CDT	Severe Thunderstorm Warning	BMX	33 min
Jul 1, 6:52 PM CDT	Special Weather Statement	BMX	23 min
Jul 1, 8:13 PM CDT	Areal Flood Advisory	BMX	2 hr
Jul 1, 10:14 PM CDT	Areal Flood Advisory	BMX	2 hr
Jul 3, 5:36 PM CDT	Mesoscale Discussion	SPC	84 min
Jul 3, 10:40 PM CDT	Special Weather Statement	BMX	65 min
Jul 4, 2:47 AM CDT	Flash Flood Watch	BMX	20 hr
Jul 4, 7:30 AM CDT	Flash Flood Warning	BMX	3 hr
Jul 10, 3:12 PM CDT	Special Weather Statement	BMX	48 min
Jul 12, 3:03 AM CDT	Heat Advisory	BMX	64 hr
Jul 14, 6:36 PM CDT	Mesoscale Discussion	SPC	114 min
Jul 14, 7:27 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
Jul 14, 8:16 PM CDT	Severe Thunderstorm Warning	BMX	59 min
Jul 14, 8:44 PM CDT	Mesoscale Discussion	SPC	61 min
Jul 15, 4:23 AM CDT	Heat Advisory	BMX	8 days
Jul 15, 12:57 PM CDT	Mesoscale Discussion	SPC	63 min
Jul 15, 4:03 PM CDT	Special Weather Statement	BMX	27 min
Jul 15, 4:19 PM CDT	Severe Thunderstorm Warning	BMX	41 min
Jul 15, 5:51 PM CDT	Special Weather Statement	BMX	24 min
Jul 17, 2:12 PM CDT	Heat Advisory	BMX	4 days
Jul 18, 3:34 PM CDT	Special Weather Statement	BMX	26 min
Jul 18, 3:40 PM CDT	Areal Flood Advisory	BMX	2 hr
Jul 18, 3:58 PM CDT	Special Weather Statement	BMX	47 min
Jul 18, 4:00 PM CDT	Special Weather Statement	BMX	30 min
Jul 19, 12:47 PM CDT	Special Weather Statement	BMX	43 min
Jul 19, 12:56 PM CDT	Severe Thunderstorm Warning	BMX	34 min
Jul 20, 7:01 PM CDT	Special Weather Statement	BMX	44 min
Jul 22, 1:15 PM CDT	Special Weather Statement	BMX	45 min
Jul 22, 1:33 PM CDT	Severe Thunderstorm Warning	BMX	42 min
Jul 22, 3:55 PM CDT	Special Weather Statement	BMX	50 min
Jul 22, 3:56 PM CDT	Severe Thunderstorm Warning	BMX	34 min
Jul 23, 12:04 PM CDT	Special Weather Statement	BMX	26 min
Jul 23, 12:58 PM CDT	Areal Flood Advisory	BMX	2 hr
Jul 24, 6:22 AM CDT	Dense Fog Advisory	BMX	87 min
Jul 24, 6:20 PM CDT	Special Weather Statement	BMX	40 min
Jul 28, 3:20 PM CDT	Heat Advisory	BMX	23 hr
Jul 28, 4:27 PM CDT	Special Weather Statement	BMX	48 min
Jul 29, 2:12 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 29, 2:35 PM CDT	Special Weather Statement	BMX	25 min
Jul 29, 2:37 PM CDT	Severe Thunderstorm Warning	BMX	38 min
Aug 5, 5:46 PM CDT	Special Weather Statement	BMX	29 min
Aug 5, 6:53 PM CDT	Areal Flood Advisory	BMX	2 hr
Aug 7, 3:27 PM CDT	Heat Advisory	BMX	3 days
Aug 8, 3:54 PM CDT	Special Weather Statement	BMX	36 min
Aug 10, 8:35 PM CDT	Severe Thunderstorm Warning	BMX	55 min
Aug 10, 9:11 PM CDT	Areal Flood Advisory	BMX	3 hr
Aug 10, 9:34 PM CDT	Special Weather Statement	BMX	26 min
Aug 18, 3:38 PM CDT	Mesoscale Discussion	SPC	3 hr
Aug 19, 3:43 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 21, 3:36 PM CDT	Special Weather Statement	BMX	39 min
Aug 22, 1:06 PM CDT	Special Weather Statement	BMX	39 min
Aug 22, 1:44 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 23, 4:15 AM CDT	Special Weather Statement	BMX	60 min
Aug 28, 7:11 PM CDT	Special Weather Statement	BMX	49 min
Aug 28, 8:22 PM CDT	Special Weather Statement	BMX	53 min
Sep 5, 2:31 PM CDT	Special Weather Statement	BMX	29 min
Sep 5, 2:36 PM CDT	Special Weather Statement	BMX	24 min
Sep 5, 3:08 PM CDT	Special Weather Statement	BMX	37 min
Sep 5, 3:21 PM CDT	Areal Flood Advisory	BMX	3 hr
Sep 9, 1:44 PM CDT	Areal Flood Advisory	BMX	3 hr
Sep 11, 4:41 AM CDT	Dense Fog Advisory	BMX	4 hr
Oct 12, 3:44 AM CDT	Dense Fog Advisory	BMX	4 hr
Oct 16, 12:26 PM CDT	Fire Weather Watch	BMX	6 hr
Oct 16, 12:26 PM CDT	Fire Weather Watch	BMX	14 hr
Oct 17, 2:17 AM CDT	Red Flag Warning	BMX	16 hr
Oct 31, 7:19 PM CDT	Special Weather Statement	BMX	41 min
Nov 10, 10:01 PM CST	Dense Fog Advisory	BMX	12 hr
Nov 13, 3:41 AM CST	Frost Advisory	BMX	27 hr
Nov 14, 10:30 AM CST	Red Flag Warning	BMX	7 hr
Nov 14, 12:30 PM CST	Frost Advisory	BMX	19 hr
Nov 17, 4:36 AM CST	Wind Advisory	BMX	34 hr
Nov 18, 7:22 AM CST	Mesoscale Discussion	SPC	83 min
Nov 18, 9:20 AM CST	Wind Advisory	BMX	3 hr
Nov 18, 9:45 AM CST	Special Weather Statement	BMX	45 min
Nov 18, 8:24 PM CST	Dense Fog Advisory	BMX	13 hr
Nov 21, 2:53 AM CST	Freeze Warning	BMX	54 hr
Dec 12, 3:56 AM CST	Dense Fog Advisory	BMX	5 hr
Dec 13, 4:05 AM CST	Wind Advisory	BMX	24 hr
Dec 17, 4:10 AM CST	Dense Fog Advisory	BMX	4 hr
Dec 23, 7:41 PM CST	Mesoscale Discussion	SPC	2 hr
Dec 23, 8:20 PM CST	Tornado Watch	SPC	8 hr
Dec 24, 3:27 AM CST	Mesoscale Discussion	SPC	93 min
Dec 25, 4:24 AM CST	Flash Flood Watch	BMX	17 hr
Dec 25, 7:21 AM CST	Flash Flood Warning	BMX	3 hr
Dec 25, 4:28 PM CST	Mesoscale Discussion	SPC	3 hr
Dec 25, 6:11 PM CST	Flash Flood Warning	BMX	10 hr
Dec 25, 6:30 PM CST	Flash Flood Warning	BMX	12 hr
Dec 25, 7:14 PM CST	Flash Flood Warning	BMX	12 hr
Dec 25, 8:21 PM CST	River Flood Warning	BMX	10 days
Dec 26, 5:25 AM CST	River Flood Warning	BMX	39 hr
Dec 26, 9:33 PM CST	River Flood Warning	BMX	4 days
Dec 27, 11:00 AM CST	River Flood Warning	BMX	7 days
Dec 27, 3:08 PM CST	Flash Flood Watch	BMX	27 hr
Dec 28, 6:41 AM CST	Tornado Watch	SPC	5 hr
Dec 28, 10:11 AM CST	Wind Advisory	BMX	8 hr
Dec 28, 10:21 AM CST	Mesoscale Discussion	SPC	84 min
Dec 28, 1:11 PM CST	Areal Flood Advisory	BMX	2 hr
Dec 28, 2:02 PM CST	Wind Advisory	BMX	4 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	18
Severe Thunderstorm Watch	2
Tornado Watch	3
Mesoscale Discussion	22
Special Weather Statement	46
Flooding
Areal Flood Warning	1
Flash Flood Warning	5
River Flood Warning	6
Flash Flood Watch	4
Areal Flood Advisory	16
Winter
Winter Storm Warning	1
Winter Storm Watch	2
Freezing Rain Advisory	1
Winter Weather Advisory	4
Heat
Heat Advisory	6
Cold
Freeze Warning	2
Hard Freeze Warning	2
Hard Freeze Watch	1
Frost Advisory	3
Wind Chill Advisory	2
Wind and dust
Wind Advisory	9
Fire
Red Flag Warning	12
Fire Weather Watch	9
Fog and smoke
Dense Fog Advisory	14

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2014 2016

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.