Alert archive / Texas / Tornado Watches in 2006

Tornado Watch 820

October 10, 200626 counties in Texas

The Storm Prediction Center issued this tornado watch at Oct 10, 2006, 3:18 AM CDT for 26 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Oct 10, 2006, 3:18 AM CDT (08:18 UTC)
Expired
Oct 10, 2006, 10:00 AM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
60 kt
All 26 counties

Bandera County, TX, Bell County, TX, Blanco County, TX, Burnet County, TX, Coryell County, TX, Crockett County, TX, Edwards County, TX, Falls County, TX, Gillespie County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, McLennan County, TX, Menard County, TX, Real County, TX, San Saba County, TX, Schleicher County, TX, Sutton County, TX, Terrell County, TX, Travis County, TX, Val Verde County, TX, Williamson County, TX

The radar

The San Angelo radar (KSJT), 91 km from the middle of the area, began a volume at 08:18 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
30%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
20%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
50%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Oct 10, 4:21 AM CDTSevere Thunderstorm WarningSJTMcCulloch, San Saba24 min
Oct 10, 5:29 AM CDTSevere Thunderstorm WarningSJTSan Saba31 min
Oct 10, 6:02 AM CDTSevere Thunderstorm WarningSJTSutton43 min
Oct 10, 7:17 AM CDTSevere Thunderstorm WarningSJTKimble28 min
Oct 10, 7:20 AM CDTSevere Thunderstorm WarningEWXTravis25 min
Oct 10, 8:22 AM CDTFlash Flood WarningEWXBlanco, Gillespie, Kerr113 min
Oct 10, 8:34 AM CDTFlash Flood WarningEWXTravis, Williamson3 hr

Discussions around it

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

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 8.3 hours before the alert went out and 185 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, Del Rio, TX at 00:00Z on 2006-10-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 628 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, Del Rio, TX at 00:00Z on 2006-10-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 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
628 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
1323 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 9, 7:44 PM CDTMesoscale DiscussionSPCAndrews, Borden, Crane, Culberson, Dawson, Ector and 15 more91 min
Oct 9, 10:44 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coke, Coleman, Comanche, Concho and 20 more2 hr
Oct 9, 11:17 PM CDTSevere Thunderstorm WatchSPCCoke, Concho, Crockett, Edwards, Irion, Kimble and 7 more6 hr
Oct 10, 1:43 AM CDTMesoscale DiscussionSPCBandera, Brewster, Crockett, Edwards, Gillespie, Kendall and 13 more92 min
Oct 10, 5:00 AM CDTMesoscale DiscussionSPCAustin, Bandera, Bastrop, Bell, Bexar, Blanco and 49 more90 min
Oct 10, 6:43 AM CDTTornado WatchSPCAnderson, Austin, Bastrop, Brazos, Burleson, Caldwell and 20 more7 hr
Oct 10, 8:52 AM CDTMesoscale DiscussionSPCBandera, Bell, Bexar, Blanco, Burnet, Comal and 27 more83 min
Oct 10, 9:31 AM CDTMesoscale DiscussionSPCAnderson, Angelina, Austin, Bastrop, Brazos, Burleson and 32 more119 min
Oct 10, 11:28 AM CDTMesoscale DiscussionSPCAngelina, Austin, Brazoria, Brazos, Colorado, Fayette and 15 more92 min
Oct 10, 11:48 AM CDTTornado WatchSPCBrazoria, Calhoun, Chambers, Fort Bend, Galveston, Hardin and 8 more5 hr
Oct 10, 12:34 PM CDTMesoscale DiscussionSPCAransas, Brazoria, Calhoun, Chambers, Fort Bend, Galveston and 14 more56 min
Oct 10, 1:39 PM CDTMesoscale DiscussionSPCAransas, Brazoria, Calhoun, Chambers, Fort Bend, Galveston and 12 more96 min
Oct 10, 3:08 PM CDTMesoscale DiscussionSPCAransas, Brazoria, Calhoun, Chambers, Galveston, Jefferson and 4 more97 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.