Alert archive / Texas / Severe Thunderstorm Watches in 2013

Severe Thunderstorm Watch 8

January 29, 201336 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Jan 29, 2013, 11:28 AM CST for 36 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jan 29, 2013, 11:28 AM CST (17:28 UTC)
Expired
Jan 29, 2013, 5:00 PM CST
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 36 counties

Bosque County, TX, Brown County, TX, Callahan County, TX, Coleman County, TX, Comanche County, TX, Concho County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Kimble County, TX, Lampasas County, TX, Mason County, TX, McCulloch County, TX, McLennan County, TX, Menard County, TX, Mills County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, San Saba County, TX, Schleicher County, TX, Somervell County, TX, Stephens County, TX, Sutton County, TX, Tarrant County, TX, Wise County, TX, Young County, TX

The radar

The Dyess AFB radar (KDYX), 95 km from the middle of the area, began a volume at 17:30 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
10%
One or more EF2 to EF5 tornadoes
5%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
30%
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

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

IssuedProductOfficeCountiesLasted
Jan 29, 11:35 AM CSTSevere Thunderstorm WarningFWDJack40 min
Jan 29, 12:24 PM CSTSevere Thunderstorm WarningSJTBrown51 min
Jan 29, 12:37 PM CSTSevere Thunderstorm WarningFWDComanche, Eastland38 min
Jan 29, 12:57 PM CSTSevere Thunderstorm WarningSJTBrown33 min
Jan 29, 1:15 PM CSTSevere Thunderstorm WarningFWDErath, Palo Pinto, Parker30 min
Jan 29, 1:37 PM CSTSevere Thunderstorm WarningFWDParker, Wise23 min
Jan 29, 1:44 PM CSTSevere Thunderstorm WarningFWDPalo Pinto, Parker31 min
Jan 29, 1:56 PM CSTSevere Thunderstorm WarningFWDDenton, Parker, Wise49 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, 5.5 hours before the alert went out and 198 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 2013-01-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 965 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 2013-01-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 401 square meters per square second.1939587897117Sfc1 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
965 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
544 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
401 m²/s²
0-3 km storm-relative helicity
413 m²/s²
Significant tornado parameter
2.4
Supercell composite
10.6

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 29, 3:28 AM CSTMesoscale DiscussionSPCBaylor, Foard, Hardeman, Knox, Wichita, Wilbarger92 min
Jan 29, 4:57 AM CSTTornado WatchSPCHardeman, Wilbarger7 hr
Jan 29, 9:46 AM CSTMesoscale DiscussionSPCBowie, Camp, Cass, Collin, Cooke, Delta and 10 more119 min
Jan 29, 10:37 AM CSTMesoscale DiscussionSPCBosque, Brown, Coleman, Collin, Comanche, Concho and 30 more53 min
Jan 29, 10:59 AM CSTTornado WatchSPCBowie, Camp, Cass, Collin, Delta, Fannin and 18 more8 hr
Jan 29, 2:15 PM CSTMesoscale DiscussionSPCBowie, Camp, Cass, Collin, Dallas, Delta and 18 more2 hr
Jan 29, 3:46 PM CSTMesoscale DiscussionSPCCoryell, Dallas, Ellis, Hill, McLennan119 min
Jan 29, 4:58 PM CSTMesoscale DiscussionSPCBowie, Camp, Cass, Delta, Franklin, Gregg and 12 more92 min
Jan 29, 5:37 PM CSTTornado WatchSPCAngelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more8 hr
Jan 29, 5:51 PM CSTMesoscale DiscussionSPCAnderson, Angelina, Brazos, Burleson, Camp, Cass and 25 more114 min

Nearby

Severe Thunderstorm Watches in Texas, 2013Every severe thunderstorm watch in 2013

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.