Weather alerts in Mason County, Texas, 2015

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

Mason County and its neighbors

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

Alerts: 136
Warnings: 28
Watches: 24
Advisories: 32
Busiest month: May67 alerts
Busiest day: May 27, 201510 alerts

Over time

By month

Warning verification

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

1 of 3 tornado warnings covering Mason County in 2015 had a tornado report inside them.

Mason County, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	1	67%	0
Severe thunderstorm warnings	21	12	43%	8	100%	31 min
Flash flood warnings	3	1	67%	0

Each office's whole area, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS San Angelo, TX: tornado warnings	42	16	62%	23	78%	18 min
NWS San Angelo, TX: severe thunderstorm warnings	329	194	41%	336	88%	22 min
NWS San Angelo, TX: flash flood warnings	50	23	54%	40	93%	71 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 7, 5:00 AM CST	Wind Advisory	SJT	13 hr
Jan 9, 2:38 PM CST	Winter Weather Advisory	SJT	21 hr
Feb 22, 3:35 AM CST	Winter Weather Advisory	SJT	36 hr
Feb 26, 3:48 PM CST	Winter Weather Advisory	SJT	68 hr
Feb 28, 6:34 PM CST	Winter Weather Advisory	SJT	14 hr
Mar 3, 1:51 AM CST	Dense Fog Advisory	SJT	5 hr
Mar 3, 9:58 PM CST	Winter Weather Advisory	SJT	32 hr
Mar 20, 6:01 AM CDT	Flash Flood Watch	SJT	37 hr
Mar 20, 12:03 PM CDT	Areal Flood Advisory	SJT	117 min
Mar 20, 12:51 PM CDT	Areal Flood Advisory	SJT	114 min
Mar 20, 2:46 PM CDT	Areal Flood Advisory	SJT	119 min
Mar 25, 3:57 PM CDT	Wind Advisory	SJT	13 hr
Apr 1, 4:14 PM CDT	Severe Thunderstorm Warning	SJT	31 min
Apr 1, 4:43 PM CDT	Severe Thunderstorm Warning	SJT	30 min
Apr 2, 3:41 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 16, 11:36 AM CDT	Special Weather Statement	SJT	39 min
Apr 16, 2:42 PM CDT	Mesoscale Discussion	SPC	63 min
Apr 16, 4:40 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 16, 7:16 PM CDT	Mesoscale Discussion	SPC	89 min
Apr 17, 10:26 AM CDT	Mesoscale Discussion	SPC	2 hr
Apr 17, 11:53 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 17, 2:16 PM CDT	Areal Flood Advisory	SJT	119 min
Apr 18, 2:13 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Apr 18, 2:57 PM CDT	Severe Thunderstorm Warning	SJT	48 min
Apr 18, 3:38 PM CDT	Tornado Warning	SJT	27 min
Apr 18, 4:31 PM CDT	Severe Thunderstorm Warning	SJT	44 min
Apr 18, 6:13 PM CDT	Severe Thunderstorm Warning	SJT	47 min
Apr 18, 6:29 PM CDT	Severe Thunderstorm Warning	SJT	46 min
Apr 18, 6:40 PM CDT	Mesoscale Discussion	SPC	95 min
Apr 18, 7:07 PM CDT	Severe Thunderstorm Warning	SJT	23 min
Apr 23, 3:35 PM CDT	Mesoscale Discussion	SPC	115 min
Apr 24, 7:17 PM CDT	Severe Thunderstorm Warning	SJT	43 min
Apr 24, 7:44 PM CDT	Special Weather Statement	SJT	31 min
Apr 26, 2:54 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 26, 6:44 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 26, 7:59 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 26, 10:28 PM CDT	Severe Thunderstorm Warning	SJT	62 min
Apr 26, 11:27 PM CDT	Special Weather Statement	SJT	33 min
May 6, 1:46 PM CDT	Mesoscale Discussion	SPC	119 min
May 6, 3:00 PM CDT	Tornado Watch	SPC	7 hr
May 9, 10:51 PM CDT	Severe Thunderstorm Watch	SPC	10 hr
May 10, 9:49 AM CDT	Mesoscale Discussion	SPC	2 hr
May 10, 10:19 AM CDT	Tornado Watch	SPC	13 hr
May 10, 10:37 AM CDT	Severe Thunderstorm Warning	SJT	38 min
May 10, 2:42 PM CDT	Mesoscale Discussion	SPC	2 hr
May 12, 2:57 AM CDT	Flash Flood Watch	SJT	40 hr
May 13, 9:01 AM CDT	Areal Flood Advisory	SJT	119 min
May 16, 9:36 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 16, 11:48 PM CDT	Mesoscale Discussion	SPC	117 min
May 17, 1:51 AM CDT	Special Weather Statement	SJT	39 min
May 17, 2:03 AM CDT	Special Weather Statement	SJT	42 min
May 17, 2:25 AM CDT	Mesoscale Discussion	SPC	95 min
May 17, 2:30 AM CDT	Special Weather Statement	SJT	60 min
May 17, 2:45 AM CDT	Special Weather Statement	SJT	45 min
May 18, 8:00 PM CDT	Mesoscale Discussion	SPC	2 hr
May 18, 8:13 PM CDT	Special Weather Statement	SJT	32 min
May 18, 8:37 PM CDT	Severe Thunderstorm Warning	SJT	38 min
May 20, 5:29 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 20, 7:39 PM CDT	Mesoscale Discussion	SPC	96 min
May 20, 9:00 PM CDT	Special Weather Statement	SJT	30 min
May 20, 10:02 PM CDT	Areal Flood Advisory	SJT	88 min
May 20, 10:13 PM CDT	Special Weather Statement	SJT	32 min
May 20, 10:52 PM CDT	Mesoscale Discussion	SPC	83 min
May 20, 11:31 PM CDT	Areal Flood Advisory	SJT	89 min
May 22, 2:07 PM CDT	Flash Flood Watch	SJT	44 hr
May 23, 3:04 PM CDT	Tornado Watch	SPC	6 hr
May 23, 4:24 PM CDT	Special Weather Statement	SJT	21 min
May 23, 5:01 PM CDT	Areal Flood Advisory	SJT	89 min
May 23, 5:25 PM CDT	Flash Flood Warning	SJT	3 hr
May 23, 6:05 PM CDT	Areal Flood Advisory	SJT	85 min
May 23, 6:06 PM CDT	Mesoscale Discussion	SPC	114 min
May 24, 12:24 AM CDT	Areal Flood Advisory	SJT	111 min
May 24, 1:02 AM CDT	Flash Flood Warning	SJT	3 hr
May 25, 3:59 AM CDT	Flash Flood Watch	SJT	12 hr
May 25, 6:45 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 25, 10:07 AM CDT	Severe Thunderstorm Warning	SJT	38 min
May 25, 10:13 AM CDT	Severe Thunderstorm Warning	SJT	47 min
May 25, 10:53 AM CDT	Severe Thunderstorm Warning	SJT	52 min
May 25, 10:54 AM CDT	Tornado Watch	SPC	7 hr
May 25, 11:42 AM CDT	Severe Thunderstorm Warning	SJT	17 min
May 25, 1:54 PM CDT	Mesoscale Discussion	SPC	2 hr
May 26, 3:58 AM CDT	Dense Fog Advisory	SJT	6 hr
May 27, 11:39 AM CDT	Mesoscale Discussion	SPC	66 min
May 27, 2:41 PM CDT	Severe Thunderstorm Warning	SJT	34 min
May 27, 3:09 PM CDT	Mesoscale Discussion	SPC	2 hr
May 27, 3:36 PM CDT	Areal Flood Advisory	SJT	114 min
May 27, 3:57 PM CDT	Special Weather Statement	SJT	33 min
May 27, 4:08 PM CDT	Severe Thunderstorm Warning	SJT	37 min
May 27, 4:41 PM CDT	Severe Thunderstorm Warning	SJT	49 min
May 27, 5:07 PM CDT	Areal Flood Advisory	SJT	83 min
May 27, 5:24 PM CDT	Severe Thunderstorm Warning	SJT	51 min
May 27, 6:01 PM CDT	Special Weather Statement	SJT	29 min
May 28, 4:20 AM CDT	Flash Flood Watch	SJT	21 hr
May 28, 6:57 PM CDT	Mesoscale Discussion	SPC	2 hr
May 28, 7:58 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 28, 9:31 PM CDT	Severe Thunderstorm Warning	SJT	59 min
May 28, 9:36 PM CDT	Tornado Warning	SJT	24 min
May 28, 9:38 PM CDT	Areal Flood Advisory	SJT	3 hr
May 28, 9:58 PM CDT	Mesoscale Discussion	SPC	2 hr
May 28, 9:59 PM CDT	Tornado Warning	SJT	31 min
May 28, 10:10 PM CDT	Flash Flood Warning	SJT	3 hr
May 28, 10:23 PM CDT	Severe Thunderstorm Warning	SJT	52 min
May 29, 4:17 AM CDT	Flash Flood Watch	SJT	26 hr
May 30, 1:35 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 30, 3:53 AM CDT	Special Weather Statement	SJT	52 min
Jun 15, 5:57 PM CDT	Areal Flood Advisory	SJT	3 hr
Jun 18, 7:11 PM CDT	Areal Flood Advisory	SJT	109 min
Jun 27, 6:01 AM CDT	Areal Flood Advisory	SJT	119 min
Aug 6, 7:09 PM CDT	Heat Advisory	SJT	5 days
Aug 12, 4:07 PM CDT	Mesoscale Discussion	SPC	53 min
Aug 13, 3:13 PM CDT	Mesoscale Discussion	SPC	47 min
Aug 19, 3:25 PM CDT	Mesoscale Discussion	SPC	2 hr
Oct 21, 2:17 PM CDT	Flash Flood Watch	SJT	63 hr
Oct 21, 5:18 PM CDT	Areal Flood Advisory	SJT	57 min
Oct 23, 2:32 PM CDT	Mesoscale Discussion	SPC	118 min
Oct 23, 11:09 PM CDT	Areal Flood Advisory	SJT	3 hr
Oct 29, 11:55 PM CDT	Mesoscale Discussion	SPC	3 hr
Oct 30, 4:45 PM CDT	Mesoscale Discussion	SPC	3 hr
Oct 30, 8:22 PM CDT	Mesoscale Discussion	SPC	113 min
Oct 30, 11:15 PM CDT	Mesoscale Discussion	SPC	2 hr
Oct 31, 12:37 AM CDT	Special Weather Statement	SJT	38 min
Nov 5, 7:20 AM CST	Mesoscale Discussion	SPC	2 hr
Nov 17, 3:17 PM CST	Frost Advisory	SJT	17 hr
Nov 20, 4:29 AM CST	Freeze Watch	SJT	10 hr
Nov 20, 4:29 AM CST	Wind Advisory	SJT	32 hr
Nov 20, 2:07 PM CST	Freeze Warning	SJT	43 hr
Dec 12, 5:13 PM CST	Severe Thunderstorm Watch	SPC	7 hr
Dec 12, 9:14 PM CST	Mesoscale Discussion	SPC	2 hr
Dec 12, 10:17 PM CST	Special Weather Statement	SJT	58 min
Dec 12, 11:13 PM CST	Special Weather Statement	SJT	62 min
Dec 12, 11:40 PM CST	Mesoscale Discussion	SPC	35 min
Dec 26, 7:20 PM CST	Winter Weather Advisory	SJT	35 hr
Dec 26, 8:58 PM CST	Severe Thunderstorm Watch	SPC	7 hr
Dec 26, 11:48 PM CST	Mesoscale Discussion	SPC	87 min
Dec 27, 10:41 PM CST	Mesoscale Discussion	SPC	4 hr
Dec 30, 7:19 PM CST	Dense Fog Advisory	SJT	17 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	21
Tornado Warning	3
Severe Thunderstorm Watch	12
Tornado Watch	4
Mesoscale Discussion	35
Special Weather Statement	17
Flooding
Flash Flood Warning	3
Flash Flood Watch	7
Areal Flood Advisory	18
Winter
Winter Weather Advisory	6
Heat
Heat Advisory	1
Cold
Freeze Warning	1
Freeze Watch	1
Frost Advisory	1
Wind and dust
Wind Advisory	3
Fog and smoke
Dense 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 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.