Alert archive / Texas / Severe Thunderstorm Watches in 2015

Severe Thunderstorm Watch 243

May 30, 201543 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at May 30, 2015, 1:35 AM CDT for 43 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 30, 2015, 1:35 AM CDT (06:35 UTC)
Expired
May 30, 2015, 7:06 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 43 counties

Bell County, TX, Bosque County, TX, Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Comanche County, TX, Concho County, TX, Coryell County, TX, Crockett County, TX, Eastland County, TX, Erath County, TX, Hamilton County, TX, Haskell County, TX, Hill County, TX, Hood County, TX, Irion County, TX, Jack County, TX, Johnson County, TX, Jones County, TX, Kimble County, TX, Lampasas County, TX, Mason County, TX, McCulloch County, TX, McLennan County, TX, Menard County, TX, Mills County, TX, Nolan County, TX, Palo Pinto County, TX, Parker County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Sterling County, TX, Sutton County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Wise County, TX, Young County, TX

The radar

The Dyess AFB radar (KDYX), 67 km from the middle of the area, began a volume at 06:35 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
2%
Ten or more severe wind reports
30%
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
60%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 30, 1:42 AM CDTSevere Thunderstorm WarningSJTCallahan, Coleman, Nolan, Runnels, Taylor48 min
May 30, 1:47 AM CDTSevere Thunderstorm WarningSJTThrockmorton43 min
May 30, 2:04 AM CDTSevere Thunderstorm WarningFWDYoung37 min
May 30, 2:12 AM CDTFlash Flood WarningSJTHaskell, Throckmorton3 hr
May 30, 2:34 AM CDTFlash Flood WarningFWDJack, Young6 hr
May 30, 2:42 AM CDTFlash Flood WarningSJTJones, Shackelford, Throckmorton3 hr
May 30, 2:43 AM CDTSevere Thunderstorm WarningSJTCallahan47 min
May 30, 3:34 AM CDTFlash Flood WarningFWDEastland, Stephens3 hr
May 30, 3:50 AM CDTFlash Flood WarningFWDWise6 hr
May 30, 4:09 AM CDTFlash Flood WarningFWDPalo Pinto3 hr
May 30, 5:51 AM CDTFlash Flood WarningFWDDallas, Johnson, Tarrant3 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

Midland Regional, TX (KMAF), launched 00:00Z, 6.6 hours before the alert went out and 231 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, Midland Regional, TX at 00:00Z on 2015-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1700 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, Midland Regional, TX at 00:00Z on 2015-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -25 square meters per square second.193958Sfc1 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
1700 J/kg
Mixed-layer CIN
-107 J/kg
Mixed-layer LCL
1643 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-25 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.5

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 29, 7:03 PM CDTMesoscale DiscussionSPCAndrews, Bailey, Borden, Briscoe, Castro, Cochran and 35 more117 min
May 29, 7:21 PM CDTSevere Thunderstorm WatchSPCAndrews, Borden, Briscoe, Cochran, Coke, Crosby and 30 more7 hr
May 30, 12:58 AM CDTMesoscale DiscussionSPCBrown, Callahan, Coleman, Comanche, Eastland, Erath and 12 more92 min
May 30, 6:20 AM CDTMesoscale DiscussionSPCAnderson, Camp, Cherokee, Ellis, Freestone, Gregg and 14 more85 min
May 30, 10:14 AM CDTMesoscale DiscussionSPCPanola, Shelby91 min
May 30, 12:10 PM CDTMesoscale DiscussionSPCDimmit, Duval, Kinney, La Salle, Maverick, Webb and 2 more65 min
May 30, 12:32 PM CDTSevere Thunderstorm WatchSPCDimmit, Frio, Kinney, La Salle, Maverick, Medina and 3 more6 hr
May 30, 5:01 PM CDTMesoscale DiscussionSPCAtascosa, Bee, DeWitt, Duval, Goliad, Jim Hogg and 7 more59 min

Nearby

Severe Thunderstorm Watches in Texas, 2015Every severe thunderstorm watch in 2015

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.