Alert archive / Texas / Severe Thunderstorm Watches in 2007

Severe Thunderstorm Watch 266

May 10, 200731 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at May 10, 2007, 5:54 PM CDT for 31 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: May 10, 2007, 5:54 PM CDT (22:54 UTC)
Expired: May 10, 2007, 11:00 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 31 counties

Aransas County, TX, Atascosa County, TX, Austin County, TX, Bee County, TX, Brazoria County, TX, Calhoun County, TX, Colorado County, TX, DeWitt County, TX, Fayette County, TX, Fort Bend County, TX, Frio County, TX, Galveston County, TX, Goliad County, TX, Gonzales County, TX, Harris County, TX, Jackson County, TX, Karnes County, TX, Kleberg County, TX, La Salle County, TX, Lavaca County, TX, Live Oak County, TX, Matagorda County, TX, McMullen County, TX, Montgomery County, TX, Nueces County, TX, Refugio County, TX, San Patricio County, TX, Victoria County, TX, Waller County, TX, Wharton County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 139 km from the middle of the area, began a volume at 22:56 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 20%
One or more EF2 to EF5 tornadoes: 5%
Ten or more severe wind reports: 20%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 30%
One or more hailstones of 2 inches or more: 20%
Six or more combined severe hail and wind reports: 70%

Warnings issued inside it

16 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
May 10, 5:59 PM CDT	Severe Thunderstorm Warning	EWX	Gonzales	46 min
May 10, 6:46 PM CDT	Severe Thunderstorm Warning	EWX	Lavaca	44 min
May 10, 7:07 PM CDT	Severe Thunderstorm Warning	HGX	Harris	38 min
May 10, 7:19 PM CDT	Severe Thunderstorm Warning	HGX	Harris, Waller	41 min
May 10, 7:28 PM CDT	Flash Flood Warning	CRP	Victoria	2 hr
May 10, 7:45 PM CDT	Severe Thunderstorm Warning	HGX	Harris, Montgomery	45 min
May 10, 7:51 PM CDT	Severe Thunderstorm Warning	HGX	Jackson	39 min
May 10, 7:56 PM CDT	Severe Thunderstorm Warning	CRP	Victoria	23 min
May 10, 8:28 PM CDT	Severe Thunderstorm Warning	HGX	Harris, Montgomery	47 min
May 10, 8:43 PM CDT	Severe Thunderstorm Warning	CRP	McMullen	62 min
May 10, 8:59 PM CDT	Severe Thunderstorm Warning	HGX	Jackson	30 min
May 10, 9:04 PM CDT	Severe Thunderstorm Warning	CRP	Live Oak	56 min
May 10, 9:07 PM CDT	Flash Flood Warning	HGX	Harris	113 min
May 10, 9:08 PM CDT	Severe Thunderstorm Warning	HGX	Harris	38 min
May 10, 9:10 PM CDT	Severe Thunderstorm Warning	HGX	Montgomery, San Jacinto	26 min
May 10, 9:21 PM CDT	Flash Flood Warning	CRP	Victoria	114 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 9, 7:03 PM CDT	Severe Thunderstorm Watch	SPC	Bell, Bexar, Blanco, Burnet, Comal, Coryell and 12 more	4 hr
May 9, 9:33 PM CDT	Mesoscale Discussion	SPC	Webb, Zapata	57 min
May 10, 2:56 PM CDT	Mesoscale Discussion	SPC	Atascosa, Austin, Bastrop, Bee, Bexar, Brazoria and 42 more	2 hr

Nearby

Severe Thunderstorm Watches in Texas, 2007 Every severe thunderstorm watch in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.