Alert archive / Texas / Severe Thunderstorm Watches in 2013

Severe Thunderstorm Watch 150

May 9, 201350 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at May 9, 2013, 11:52 AM CDT for 50 counties in Texas. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued
May 9, 2013, 11:52 AM CDT (16:52 UTC)
Expired
May 9, 2013, 9:00 PM CDT
In force
9 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
60 kt
All 50 counties

Anderson County, TX, Bell County, TX, Bosque County, TX, Brown County, TX, Burnet County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Comanche County, TX, Concho County, TX, Coryell County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Fisher County, TX, Freestone County, TX, Hamilton County, TX, Haskell County, TX, Henderson County, TX, Hill County, TX, Irion County, TX, Johnson County, TX, Jones County, TX, Kaufman County, TX, Kimble 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, Nolan County, TX, Robertson County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Shackelford County, TX, Somervell County, TX, Sterling County, TX, Sutton County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Van Zandt County, TX, Williamson County, TX

The radar

The Dyess AFB radar (KDYX), 85 km from the middle of the area, began a volume at 16:54 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
20%
One or more EF2 to EF5 tornadoes
10%
Ten or more severe wind reports
60%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
95%
One or more hailstones of 2 inches or more
50%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 9, 12:14 PM CDTSevere Thunderstorm WarningFWDBosque, Hamilton61 min
May 9, 12:49 PM CDTSevere Thunderstorm WarningFWDCoryell, Hamilton56 min
May 9, 1:38 PM CDTSevere Thunderstorm WarningSJTFisher, Nolan52 min
May 9, 1:42 PM CDTSevere Thunderstorm WarningFWDBell, Coryell, McLennan63 min
May 9, 1:53 PM CDTSevere Thunderstorm WarningSJTFisher, Jones52 min
May 9, 2:18 PM CDTSevere Thunderstorm WarningSJTFisher, Nolan42 min
May 9, 2:29 PM CDTSevere Thunderstorm WarningFWDBell, Falls, Milam61 min
May 9, 2:54 PM CDTSevere Thunderstorm WarningSJTFisher, Nolan, Taylor51 min
May 9, 3:10 PM CDTSevere Thunderstorm WarningSJTNolan, Taylor50 min
May 9, 3:16 PM CDTSevere Thunderstorm WarningFWDFalls, Milam, Robertson59 min
May 9, 3:28 PM CDTTornado WarningSJTNolan, Taylor32 min
May 9, 3:31 PM CDTSevere Thunderstorm WarningSJTCoke, Runnels29 min
May 9, 3:54 PM CDTTornado WarningSJTRunnels, Taylor36 min
May 9, 3:56 PM CDTSevere Thunderstorm WarningSJTCoke, Runnels49 min
May 9, 4:08 PM CDTSevere Thunderstorm WarningFWDLeon52 min
May 9, 4:30 PM CDTSevere Thunderstorm WarningSJTRunnels45 min
May 9, 4:59 PM CDTSevere Thunderstorm WarningSJTColeman, Concho, Runnels46 min
May 9, 5:33 PM CDTSevere Thunderstorm WarningSJTConcho, Menard, Tom Green57 min
May 9, 5:39 PM CDTSevere Thunderstorm WarningSJTColeman51 min
May 9, 6:11 PM CDTFlash Flood WarningFWDAnderson, Henderson3 hr
May 9, 6:24 PM CDTSevere Thunderstorm WarningSJTMcCulloch, Menard66 min
May 9, 6:32 PM CDTSevere Thunderstorm WarningFWDAnderson58 min
May 9, 6:49 PM CDTSevere Thunderstorm WarningSJTSutton56 min
May 9, 6:54 PM CDTSevere Thunderstorm WarningSJTConcho, Menard, Schleicher66 min
May 9, 7:14 PM CDTSevere Thunderstorm WarningSJTMcCulloch, Mason, Menard61 min
May 9, 7:41 PM CDTSevere Thunderstorm WarningSJTKimble, Sutton64 min
May 9, 7:54 PM CDTSevere Thunderstorm WarningSJTKimble, Mason, Menard66 min
May 9, 8:01 PM CDTSevere Thunderstorm WarningSJTMason44 min
May 9, 8:07 PM CDTSevere Thunderstorm WarningEWXGillespie, Llano68 min
May 9, 8:40 PM CDTSevere Thunderstorm WarningSJTKimble, Mason65 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, 4.9 hours before the alert went out and 168 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 2013-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 474 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 2013-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 229 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
474 J/kg
Mixed-layer CIN
-390 J/kg
Mixed-layer LCL
797 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
229 m²/s²
0-3 km storm-relative helicity
228 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 9, 6:39 AM CDTMesoscale DiscussionSPCBosque, Brown, Callahan, Coleman, Comanche, Concho and 13 more3 hr
May 9, 9:37 AM CDTMesoscale DiscussionSPCBell, Bosque, Brown, Burnet, Coleman, Comanche and 15 more113 min
May 9, 2:52 PM CDTMesoscale DiscussionSPCAngelina, Brazos, Grimes, Hardin, Houston, Jasper and 12 more53 min
May 9, 3:19 PM CDTMesoscale DiscussionSPCAnderson, Bell, Bosque, Brown, Burnet, Callahan and 42 more56 min
May 9, 3:34 PM CDTSevere Thunderstorm WatchSPCAngelina, Brazos, Burleson, Chambers, Cherokee, Gregg and 25 more6 hr
May 9, 5:38 PM CDTMesoscale DiscussionSPCBriscoe, Childress, Collingsworth, Cottle, Crosby, Donley and 4 more67 min
May 9, 6:12 PM CDTMesoscale DiscussionSPCAnderson, Atascosa, Bandera, Bexar, Blanco, Brown and 47 more63 min
May 9, 6:40 PM CDTMesoscale DiscussionSPCAngelina, Cherokee, Hardin, Jasper, Liberty, Montgomery and 10 more2 hr

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.