Weather alerts in Lavaca County, Texas, 2021

116 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Lavaca County and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts: 116
Warnings: 35
Watches: 15
Advisories: 37
Busiest month: May40 alerts
Busiest day: May 18, 202110 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 6 tornado warnings covering Lavaca County in 2021 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 6 minutes after it went out.

Lavaca County, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	6	1	83%	1	100%	6 min
Severe thunderstorm warnings	8	1	88%	3	67%	46 min
Flash flood warnings	7	4	43%	1	100%	363 min

Each office's whole area, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Austin/San Antonio, TX: tornado warnings	25	3	88%	4	75%	7 min
NWS Austin/San Antonio, TX: severe thunderstorm warnings	197	76	61%	239	92%	30 min
NWS Austin/San Antonio, TX: flash flood warnings	65	38	42%	91	93%	118 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, 1:18 AM CST	Dense Fog Advisory	EWX	9 hr
Jan 6, 12:59 PM CST	Severe Thunderstorm Watch	SPC	7 hr
Jan 15, 4:35 AM CST	Wind Advisory	EWX	13 hr
Jan 23, 8:52 PM CST	Dense Fog Advisory	EWX	15 hr
Feb 12, 3:20 PM CST	Winter Storm Watch	EWX	23 hr
Feb 12, 3:20 PM CST	Winter Storm Warning	EWX	69 hr
Feb 14, 3:47 AM CST	Wind Chill Advisory	EWX	9 hr
Feb 14, 1:01 PM CST	Wind Chill Warning	EWX	23 hr
Feb 15, 2:40 PM CST	Wind Chill Warning	EWX	21 hr
Feb 15, 2:40 PM CST	Winter Storm Warning	EWX	3 days
Feb 15, 2:44 PM CST	Hard Freeze Warning	EWX	21 hr
Feb 17, 1:55 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 17, 3:11 PM CST	Winter Weather Advisory	EWX	27 hr
Feb 18, 2:45 PM CST	Hard Freeze Warning	EWX	19 hr
Feb 19, 2:08 PM CST	Hard Freeze Warning	EWX	19 hr
Mar 9, 7:40 AM CST	Dense Fog Advisory	EWX	2 hr
Mar 15, 6:28 AM CDT	Dense Fog Advisory	EWX	3 hr
Mar 22, 11:10 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Mar 23, 1:29 AM CDT	Mesoscale Discussion	SPC	91 min
Mar 23, 2:16 AM CDT	Severe Thunderstorm Warning	EWX	59 min
Mar 23, 3:03 AM CDT	Severe Thunderstorm Warning	EWX	33 min
Mar 23, 3:19 AM CDT	Mesoscale Discussion	SPC	56 min
Mar 23, 3:43 AM CDT	Special Weather Statement	EWX	47 min
Mar 23, 4:07 AM CDT	Severe Thunderstorm Warning	EWX	38 min
Apr 8, 5:40 AM CDT	Dense Fog Advisory	EWX	3 hr
Apr 14, 12:43 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 14, 5:27 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 23, 7:05 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
Apr 28, 9:13 PM CDT	Mesoscale Discussion	SPC	92 min
Apr 28, 10:22 PM CDT	Tornado Watch	SPC	7 hr
Apr 30, 3:34 AM CDT	Flash Flood Watch	EWX	39 hr
Apr 30, 11:59 PM CDT	Areal Flood Advisory	EWX	3 hr
May 1, 3:09 AM CDT	Areal Flood Advisory	EWX	51 min
May 1, 3:57 AM CDT	Flash Flood Warning Considerable damage threat	EWX	3 hr
May 1, 2:15 PM CDT	River Flood Warning	HGX	21 days
May 1, 4:25 PM CDT	Areal Flood Advisory	EWX	3 hr
May 11, 3:41 PM CDT	Severe Thunderstorm Watch	SPC	10 hr
May 11, 5:23 PM CDT	Mesoscale Discussion	SPC	2 hr
May 11, 7:34 PM CDT	Special Weather Statement	EWX	41 min
May 17, 12:47 PM CDT	Mesoscale Discussion	SPC	88 min
May 17, 2:34 PM CDT	Flash Flood Watch	EWX	55 hr
May 17, 3:59 PM CDT	Special Weather Statement	EWX	61 min
May 17, 4:15 PM CDT	Areal Flood Advisory	EWX	2 hr
May 17, 5:05 PM CDT	Special Weather Statement	EWX	40 min
May 18, 1:18 PM CDT	Mesoscale Discussion	SPC	117 min
May 18, 2:29 PM CDT	Tornado Watch	SPC	7 hr
May 18, 3:52 PM CDT	Mesoscale Discussion	SPC	83 min
May 18, 4:39 PM CDT	Severe Thunderstorm Warning	EWX	66 min
May 18, 4:48 PM CDT	Tornado Warning	EWX	27 min
May 18, 5:03 PM CDT	Areal Flood Advisory	EWX	3 hr
May 18, 6:13 PM CDT	Mesoscale Discussion	SPC	92 min
May 18, 6:39 PM CDT	Tornado Warning	EWX	51 min
May 18, 6:44 PM CDT	Flash Flood Warning Considerable damage threat	EWX	8 hr
May 18, 6:53 PM CDT	Areal Flood Advisory	EWX	3 hr
May 18, 7:25 PM CDT	Tornado Warning	EWX	20 min
May 18, 7:42 PM CDT	Special Weather Statement	EWX	48 min
May 18, 7:53 PM CDT	Flash Flood Warning Considerable damage threat	EWX	4 hr
May 18, 8:23 PM CDT	Flash Flood Warning Considerable damage threat	EWX	4 hr
May 19, 2:10 AM CDT	River Flood Warning	HGX	43 hr
May 19, 2:10 AM CDT	River Flood Warning	HGX	4 days
May 19, 2:39 AM CDT	Flash Flood Warning Considerable damage threat	EWX	3 hr
May 19, 2:48 AM CDT	Special Weather Statement	EWX	42 min
May 19, 9:58 AM CDT	River Flood Warning	HGX	4 days
May 22, 2:45 PM CDT	Flash Flood Watch	EWX	3 days
May 23, 5:41 PM CDT	Areal Flood Advisory	EWX	3 hr
May 24, 9:28 AM CDT	River Flood Warning	HGX	31 hr
May 28, 5:54 PM CDT	Mesoscale Discussion	SPC	96 min
May 28, 6:20 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 28, 8:38 PM CDT	Severe Thunderstorm Warning	EWX	52 min
May 28, 10:23 PM CDT	Severe Thunderstorm Warning	EWX	21 min
May 28, 10:47 PM CDT	Special Weather Statement	EWX	58 min
Jun 2, 3:45 PM CDT	Special Weather Statement	EWX	45 min
Jun 3, 3:44 PM CDT	Areal Flood Advisory	EWX	5 hr
Jun 3, 5:22 PM CDT	Areal Flood Advisory	EWX	3 hr
Jun 5, 4:53 PM CDT	Areal Flood Advisory	EWX	3 hr
Jun 14, 4:06 PM CDT	Special Weather Statement	EWX	54 min
Jun 14, 5:11 PM CDT	Special Weather Statement	EWX	64 min
Jun 21, 2:24 AM CDT	Heat Advisory	EWX	18 hr
Jul 3, 5:51 PM CDT	Areal Flood Advisory	EWX	3 hr
Jul 7, 4:26 AM CDT	Flash Flood Watch	EWX	63 hr
Jul 8, 6:45 PM CDT	Areal Flood Advisory	EWX	3 hr
Jul 9, 9:45 AM CDT	River Flood Warning	HGX	64 hr
Jul 9, 11:19 AM CDT	Areal Flood Advisory	EWX	5 hr
Jul 9, 6:35 PM CDT	River Flood Warning	HGX	39 hr
Jul 12, 5:12 PM CDT	Areal Flood Advisory	EWX	3 hr
Sep 6, 5:06 PM CDT	Special Weather Statement	EWX	54 min
Sep 12, 4:02 PM CDT	Tropical Storm Watch	EWX	30 hr
Sep 18, 3:39 PM CDT	Special Weather Statement	EWX	66 min
Sep 29, 2:05 AM CDT	Areal Flood Advisory	EWX	4 hr
Oct 12, 3:34 AM CDT	Flash Flood Watch	EWX	54 hr
Oct 14, 2:48 AM CDT	Tornado Warning	EWX	27 min
Oct 14, 3:19 AM CDT	Tornado Warning	EWX	26 min
Oct 14, 3:22 AM CDT	Mesoscale Discussion	SPC	2 hr
Oct 14, 3:39 AM CDT	Tornado Warning	EWX	36 min
Oct 14, 3:42 AM CDT	Flash Flood Warning Considerable damage threat	EWX	7 hr
Oct 14, 4:24 AM CDT	Severe Thunderstorm Warning	EWX	66 min
Oct 14, 5:10 AM CDT	Severe Thunderstorm Warning	EWX	21 min
Oct 14, 6:27 AM CDT	Flash Flood Warning Considerable damage threat	EWX	6 hr
Oct 21, 3:38 AM CDT	Dense Fog Advisory	EWX	6 hr
Oct 22, 5:26 AM CDT	Dense Fog Advisory	EWX	5 hr
Oct 27, 1:32 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Oct 27, 5:13 AM CDT	Mesoscale Discussion	SPC	2 hr
Oct 27, 6:43 AM CDT	Special Weather Statement	EWX	62 min
Oct 27, 7:45 AM CDT	Special Weather Statement	EWX	30 min
Oct 27, 7:05 PM CDT	Wind Advisory	EWX	24 hr
Dec 1, 4:40 AM CST	Dense Fog Advisory	EWX	4 hr
Dec 2, 2:51 AM CST	Dense Fog Advisory	EWX	8 hr
Dec 2, 9:05 PM CST	Dense Fog Advisory	EWX	11 hr
Dec 5, 6:41 AM CST	Dense Fog Advisory	EWX	3 hr
Dec 9, 7:32 AM CST	Dense Fog Advisory	EWX	2 hr
Dec 14, 12:52 AM CST	Dense Fog Advisory	EWX	11 hr
Dec 18, 9:02 AM CST	Mesoscale Discussion	SPC	118 min
Dec 23, 3:58 AM CST	Dense Fog Advisory	EWX	5 hr
Dec 26, 1:42 AM CST	Dense Fog Advisory	EWX	8 hr
Dec 30, 2:28 AM CST	Dense Fog Advisory	EWX	7 hr
Dec 31, 3:04 AM CST	Dense Fog Advisory	EWX	6 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	8
Tornado Warning	6
Severe Thunderstorm Watch	6
Tornado Watch	2
Mesoscale Discussion	15
Special Weather Statement	14
Flooding
Flash Flood Warning	7
River Flood Warning	7
Flash Flood Watch	5
Areal Flood Advisory	15
Winter
Winter Storm Warning	2
Winter Storm Watch	1
Winter Weather Advisory	1
Heat
Heat Advisory	1
Cold
Hard Freeze Warning	3
Wind Chill Warning	2
Wind Chill Advisory	1
Wind and dust
Wind Advisory	2
Fog and smoke
Dense Fog Advisory	17
Tropical
Tropical Storm Watch	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 2020 2022

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.