Alert archive / Texas / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Texas, 2008

2,165 severe thunderstorm warnings in 2008. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.

Severe Thunderstorm Warnings by county

Each county as a circle sized by its count in 2008. Tap one for its archive.

Severe Thunderstorm Warnings: 2,165
Busiest month: May541 severe thunderstorm warnings
Busiest day: April 10, 200890 severe thunderstorm warnings

Over time

By month

Warning verification

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

797 of 2,168 severe thunderstorm warnings covering Texas in 2008 had a qualifying storm report inside them; 1,393 of 1,792 hail, wind and damage reports fell inside a warning, on average 26 minutes after it went out.

Texas, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	2,168	797	63%	1,792	78%	26 min

Each office's whole area, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Fort Worth, TX: severe thunderstorm warnings	411	171	58%	378	76%	24 min
NWS Lake Charles, LA: severe thunderstorm warnings	166	56	66%	139	67%	22 min
NWS Norman, OK: severe thunderstorm warnings	871	293	66%	719	82%	24 min
NWS Shreveport, LA: severe thunderstorm warnings	461	201	56%	484	74%	23 min
NWS Houston/Galveston, TX: severe thunderstorm warnings	159	41	74%	85	68%	20 min
NWS Brownsville, TX: severe thunderstorm warnings	34	6	82%	20	65%	23 min
NWS Corpus Christi, TX: severe thunderstorm warnings	43	5	88%	27	26%	25 min
NWS Amarillo, TX: severe thunderstorm warnings	226	142	37%	457	91%	31 min
NWS San Angelo, TX: severe thunderstorm warnings	247	59	76%	130	72%	26 min
NWS Austin/San Antonio, TX: severe thunderstorm warnings	152	52	66%	148	66%	26 min
NWS Midland/Odessa, TX: severe thunderstorm warnings	283	76	73%	154	77%	22 min
NWS El Paso, TX: severe thunderstorm warnings	55	10	82%	16	75%	22 min
NWS Lubbock, TX: severe thunderstorm warnings	254	104	59%	237	77%	26 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

2,165 alerts are too many to list on one page. Narrow it to a product above, to a month in the chart, or to a county.

By county

Every county with at least one alert. A county page lists each alert that covered it.

214 more counties

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record The radar archive 2007 2009

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.