Alert archive / Texas / Tornado Watches in 2006

Tornado Watch 299

May 6, 200623 counties in Texas

The Storm Prediction Center issued this tornado watch at May 6, 2006, 1:28 AM CDT for 23 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
May 6, 2006, 1:28 AM CDT (06:28 UTC)
Expired
May 6, 2006, 8:00 AM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
70 kt
All 23 counties

Austin County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Grimes County, TX, Harris County, TX, Houston County, TX, Jackson County, TX, Liberty County, TX, Madison County, TX, Matagorda County, TX, Montgomery County, TX, Polk County, TX, San Jacinto County, TX, Trinity County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX

The radar

The Houston radar (KHGX), 113 km from the middle of the area, began a volume at 06:32 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
40%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
70%
One or more gusts of 65 knots or more
50%
Ten or more severe hail reports
60%
One or more hailstones of 2 inches or more
50%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 6, 3:14 AM CDTSevere Thunderstorm WarningHGXBrazos, Burleson61 min
May 6, 4:12 AM CDTSevere Thunderstorm WarningHGXGrimes, Madison, Washington48 min
May 6, 5:48 AM CDTSevere Thunderstorm WarningHGXHarris, Montgomery57 min
May 6, 6:22 AM CDTSevere Thunderstorm WarningHGXHarris38 min
May 6, 6:28 AM CDTSevere Thunderstorm WarningHGXLiberty44 min
May 6, 7:26 AM CDTSevere Thunderstorm WarningHGXGalveston34 min

Discussions around it

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

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 6.5 hours before the alert went out and 317 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Fort Worth, TX at 00:00Z on 2006-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 510 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 00:00Z on 2006-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -50 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
510 J/kg
Mixed-layer CIN
-138 J/kg
Mixed-layer LCL
1221 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
-50 m²/s²
0-3 km storm-relative helicity
38 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 5, 7:07 PM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Bosque, Clay, Comanche, Coryell and 17 more6 hr
May 5, 7:26 PM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bexar, Blanco, Comal, Edwards and 15 more2 hr
May 5, 9:24 PM CDTTornado WatchSPCBell, Bosque, Brown, Callahan, Coke, Coleman and 39 more8 hr
May 5, 11:15 PM CDTMesoscale DiscussionSPCBell, Bosque, Brazos, Brown, Burnet, Callahan and 44 more90 min
May 5, 11:40 PM CDTSevere Thunderstorm WatchSPCBastrop, Blanco, Burnet, Fayette, Gillespie, Lee and 3 more5 hr
May 6, 2:31 AM CDTMesoscale DiscussionSPCBastrop, Blanco, Brazos, Burleson, Caldwell, Comal and 15 more89 min
May 6, 6:48 AM CDTMesoscale DiscussionSPCChambers, Hardin, Jasper, Jefferson, Newton, Orange and 1 more57 min
May 6, 12:11 PM CDTMesoscale DiscussionSPCBandera, Blanco, Burnet, Edwards, Gillespie, Kendall and 11 more2 hr
May 6, 2:31 PM CDTMesoscale DiscussionSPCBrooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 2 more119 min
May 6, 2:37 PM CDTSevere Thunderstorm WatchSPCBandera, Bexar, Blanco, Burnet, Comal, Edwards and 16 more6 hr
May 6, 5:35 PM CDTMesoscale DiscussionSPCBlanco, Burnet, Gillespie, Kendall, Kerr, Kimble and 3 more85 min

Nearby

Tornado Watches in Texas, 2006Every tornado watch in 2006

Sources

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