Alert archive / Texas / Tornado Watches in 2010

Tornado Watch 704

October 23, 20106 counties in Oklahoma; 50 counties in Texas

The Storm Prediction Center issued this tornado watch at Oct 23, 2010, 12:05 PM CDT for 6 counties in Oklahoma; 50 counties in Texas. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Oct 23, 2010, 12:05 PM CDT (17:05 UTC)
Expired
Oct 23, 2010, 8:00 PM CDT
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 56 counties

Atoka County, OK, Bryan County, OK, Choctaw County, OK, Johnston County, OK, Marshall County, OK, Pushmataha County, OK, Anderson County, TX, Bell County, TX, Bosque County, TX, Brown County, TX, Burnet County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Fannin County, TX, Freestone County, TX, Grayson County, TX, Hamilton County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Kimble County, TX, Lamar County, TX, Lampasas County, TX, Leon County, TX, Limestone County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, McLennan County, TX, Menard County, TX, Milam County, TX, Mills County, TX, Navarro County, TX, Palo Pinto County, TX, Parker County, TX, Rains County, TX, Robertson County, TX, Rockwall County, TX, San Saba County, TX, Somervell County, TX, Tarrant County, TX, Van Zandt County, TX, Wise County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 61 km from the middle of the area, began a volume at 17:06 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
30%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Oct 23, 12:06 PM CDTSevere Thunderstorm WarningFWDParker, Tarrant54 min
Oct 23, 12:46 PM CDTSevere Thunderstorm WarningFWDTarrant44 min
Oct 23, 12:53 PM CDTTornado WarningFWDTarrant25 min
Oct 23, 1:04 PM CDTFlash Flood WarningFWDHood, Parker, Tarrant116 min
Oct 23, 1:06 PM CDTTornado WarningFWDCollin, Dallas, Denton39 min
Oct 23, 1:07 PM CDTFlash Flood WarningFWDCooke, Denton, Grayson113 min
Oct 23, 1:18 PM CDTSevere Thunderstorm WarningOUNAtoka, Bryan44 min
Oct 23, 1:48 PM CDTSevere Thunderstorm WarningTSALatimer, Pittsburg, Pushmataha43 min
Oct 23, 2:27 PM CDTSevere Thunderstorm WarningSJTKimble, Sutton39 min
Oct 23, 2:57 PM CDTFlash Flood WarningFWDDallas, Rockwall3 hr
Oct 23, 3:14 PM CDTFlash Flood WarningFWDEllis, Johnson, Tarrant2 hr
Oct 23, 3:15 PM CDTSevere Thunderstorm WarningFWDHill, Limestone, McLennan, Navarro60 min
Oct 23, 3:34 PM CDTTornado WarningFWDEllis, Henderson, Kaufman, Navarro41 min
Oct 23, 3:57 PM CDTTornado WarningFWDHill, Navarro48 min
Oct 23, 4:03 PM CDTSevere Thunderstorm WarningFWDFalls, Freestone, Leon, Limestone, Robertson42 min
Oct 23, 4:08 PM CDTTornado WarningFWDKaufman, Van Zandt52 min
Oct 23, 4:17 PM CDTTornado WarningFWDFalls, Freestone, Leon, Limestone, Robertson58 min
Oct 23, 4:26 PM CDTSevere Thunderstorm WarningEWXBlanco, Burnet, Gillespie, Llano49 min
Oct 23, 4:34 PM CDTTornado WarningFWDHenderson, Navarro41 min
Oct 23, 4:47 PM CDTTornado WarningFWDRains, Van Zandt43 min
Oct 23, 5:12 PM CDTSevere Thunderstorm WarningFWDHenderson, Van Zandt48 min
Oct 23, 5:14 PM CDTSevere Thunderstorm WarningFWDAnderson, Freestone, Limestone46 min
Oct 23, 5:55 PM CDTSevere Thunderstorm WarningFWDLeon50 min
Oct 23, 5:58 PM CDTSevere Thunderstorm WarningFWDAnderson, Freestone47 min
Oct 23, 6:41 PM CDTSevere Thunderstorm WarningFWDAnderson, Leon17 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 12:00Z, 5.1 hours before the alert went out and 39 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 12:00Z on 2010-10-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1496 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 12:00Z on 2010-10-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 207 square meters per square second.1939587897Sfc1 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
1496 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
606 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
207 m²/s²
0-3 km storm-relative helicity
173 m²/s²
Significant tornado parameter
1.7
Supercell composite
8.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 22, 7:32 PM CDTMesoscale DiscussionSPCAtoka, Carter, Cleveland, Coal, Comanche, Cotton and 35 more118 min
Oct 23, 7:29 AM CDTMesoscale DiscussionSPCJefferson, Love91 min
Oct 23, 9:28 AM CDTMesoscale DiscussionSPCAdair, Atoka, Bryan, Cherokee, Choctaw, Coal and 21 more92 min
Oct 23, 11:42 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Johnston and 2 more63 min
Oct 23, 2:54 AM CDTMesoscale DiscussionSPCArcher, Baylor, Brown, Callahan, Coke, Coleman and 32 more3 hr
Oct 23, 5:21 AM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Brown, Callahan, Clay, Coke and 40 more8 hr
Oct 23, 3:09 PM CDTMesoscale DiscussionSPCEllis, Falls, Freestone, Kaufman, Limestone, McLennan and 3 more2 hr
Oct 23, 5:12 PM CDTTornado WatchSPCBowie, Camp, Cass, Cherokee, Franklin, Gregg and 9 more4 hr

Nearby

Tornado Watches in Texas, 2010Tornado Watches in Oklahoma, 2010Every tornado watch in 2010

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.