Alert archive / Texas / Tornado Watches in 2010

Tornado Watch 149

May 10, 201029 counties in Texas

The Storm Prediction Center issued this tornado watch at May 10, 2010, 4:27 PM CDT for 29 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
May 10, 2010, 4:27 PM CDT (21:27 UTC)
Expired
May 10, 2010, 11:33 PM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
70 kt
All 29 counties

Archer County, TX, Baylor County, TX, Brown County, TX, Callahan County, TX, Clay County, TX, Coke County, TX, Coleman County, TX, Comanche County, TX, Cooke County, TX, Denton County, TX, Eastland County, TX, Erath County, TX, Fannin County, TX, Grayson County, TX, Haskell County, TX, Jack County, TX, Jones County, TX, Lamar County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Runnels County, TX, Shackelford County, TX, Stephens County, TX, Taylor County, TX, Throckmorton County, TX, Wichita County, TX, Wise County, TX, Young County, TX

The radar

The Dyess AFB radar (KDYX), 84 km from the middle of the area, began a volume at 21:29 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
50%
One or more gusts of 65 knots or more
40%
Ten or more severe hail reports
60%
One or more hailstones of 2 inches or more
40%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 10, 4:51 PM CDTSevere Thunderstorm WarningOUNClay, Wichita54 min
May 10, 7:04 PM CDTTornado WarningFWDGrayson42 min
May 10, 8:05 PM CDTSevere Thunderstorm WarningSJTShackelford15 min
May 10, 8:18 PM CDTSevere Thunderstorm WarningSJTCallahan42 min
May 10, 8:35 PM CDTSevere Thunderstorm WarningFWDCooke, Montague55 min
May 10, 8:35 PM CDTTornado WarningOUNClay40 min
May 10, 8:50 PM CDTSevere Thunderstorm WarningSJTCallahan38 min
May 10, 9:19 PM CDTSevere Thunderstorm WarningFWDGrayson56 min
May 10, 9:51 PM CDTSevere Thunderstorm WarningFWDFannin, Lamar54 min
May 10, 9:52 PM CDTTornado WarningFWDGrayson38 min
May 10, 10:18 PM CDTTornado WarningFWDFannin, Grayson57 min
May 10, 10:29 PM CDTTornado WarningFWDLamar31 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, 9.5 hours before the alert went out and 152 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 2010-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 222 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 2010-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 428 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
222 J/kg
Mixed-layer CIN
-387 J/kg
Mixed-layer LCL
524 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
428 m²/s²
0-3 km storm-relative helicity
608 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 10, 10:37 AM CDTMesoscale DiscussionSPCBeaver, Harper113 min
May 10, 12:46 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Garfield, Grant, Kay, Kingfisher and 7 more119 min
May 10, 1:25 PM CDTTornado Watch PDSSPCAlfalfa, Blaine, Caddo, Canadian, Carter, Cleveland and 38 more9 hr
May 10, 2:53 PM CDTMesoscale DiscussionSPCAlfalfa, Garfield, Grant, Kay, Noble, Osage and 3 more97 min
May 10, 3:40 PM CDTMesoscale DiscussionSPCBlaine, Caddo, Canadian, Comanche, Cotton, Garfield and 7 more2 hr
May 10, 4:42 PM CDTMesoscale DiscussionSPCCanadian, Cleveland, Comanche, Craig, Creek, Garvin and 27 more63 min
May 10, 5:00 PM CDTTornado Watch PDSSPCAdair, Atoka, Bryan, Cherokee, Choctaw, Coal and 19 more6 hr
May 10, 6:45 PM CDTMesoscale DiscussionSPCAtoka, Carter, Cherokee, Coal, Craig, Creek and 26 more60 min
May 10, 3:28 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Cooke, Denton, Haskell and 11 more62 min

Nearby

Tornado Watches in Texas, 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.