Alert archive / Texas / Severe Thunderstorm Watches in 2018

Severe Thunderstorm Watch 64

May 2, 201842 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at May 2, 2018, 4:41 PM CDT for 42 counties in Texas. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued
May 2, 2018, 4:41 PM CDT (21:41 UTC)
Expired
May 3, 2018, 2:00 AM CDT
In force
9 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
60 kt
All 42 counties

Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crockett County, TX, Eastland County, TX, Edwards County, TX, Fisher County, TX, Glasscock County, TX, Haskell County, TX, Howard County, TX, Irion County, TX, Jack County, TX, Jones County, TX, Kent County, TX, Kimble County, TX, McCulloch County, TX, Menard County, TX, Mitchell County, TX, Montague County, TX, Nolan County, TX, Palo Pinto County, TX, Parker County, TX, Pecos County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Scurry County, TX, Shackelford County, TX, Stephens County, TX, Sterling County, TX, Stonewall County, TX, Sutton County, TX, Taylor County, TX, Terrell County, TX, Throckmorton County, TX, Tom Green County, TX, Upton County, TX, Val Verde County, TX, Wise County, TX, Young County, TX

The radar

The San Angelo radar (KSJT), 68 km from the middle of the area, began a volume at 21:44 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
50%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
60%
One or more hailstones of 2 inches or more
60%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 2, 4:42 PM CDTSevere Thunderstorm WarningMAFTerrell33 min
May 2, 5:14 PM CDTSevere Thunderstorm WarningEWXVal Verde46 min
May 2, 5:18 PM CDTSevere Thunderstorm WarningMAFTerrell27 min
May 2, 5:28 PM CDTSevere Thunderstorm WarningSJTHaskell, Jones47 min
May 2, 5:34 PM CDTSevere Thunderstorm WarningSJTCrockett41 min
May 2, 5:40 PM CDTSevere Thunderstorm WarningSJTCrockett50 min
May 2, 5:57 PM CDTSevere Thunderstorm WarningEWXVal Verde18 min
May 2, 5:57 PM CDTSevere Thunderstorm WarningSJTHaskell, Jones, Shackelford, Throckmorton48 min
May 2, 6:13 PM CDTSevere Thunderstorm WarningMAFReagan32 min
May 2, 6:26 PM CDTSevere Thunderstorm WarningSJTCrockett49 min
May 2, 6:58 PM CDTSevere Thunderstorm WarningSJTHaskell, Jones, Shackelford, Throckmorton47 min
May 2, 7:12 PM CDTSevere Thunderstorm WarningSJTCrockett, Sutton48 min
May 2, 7:34 PM CDTSevere Thunderstorm WarningSJTShackelford56 min
May 2, 7:43 PM CDTSevere Thunderstorm WarningFWDYoung77 min
May 2, 7:46 PM CDTSevere Thunderstorm WarningSJTShackelford, Throckmorton44 min
May 2, 7:55 PM CDTSevere Thunderstorm WarningSJTCrockett, Sutton50 min
May 2, 8:29 PM CDTSevere Thunderstorm WarningSJTShackelford, Throckmorton46 min
May 2, 8:41 PM CDTSevere Thunderstorm WarningSJTSchleicher, Sutton49 min
May 2, 9:20 PM CDTSevere Thunderstorm WarningSJTShackelford, Throckmorton40 min
May 2, 10:05 PM CDTSevere Thunderstorm WarningMAFTerrell25 min
May 2, 10:06 PM CDTSevere Thunderstorm WarningEWXVal Verde54 min
May 2, 10:26 PM CDTSevere Thunderstorm WarningMAFGlasscock, Howard, Mitchell45 min
May 2, 10:29 PM CDTSevere Thunderstorm WarningMAFPecos31 min
May 2, 10:34 PM CDTSevere Thunderstorm WarningSJTCrockett41 min
May 2, 10:35 PM CDTSevere Thunderstorm WarningMAFBorden, Dawson, Howard, Martin, Scurry55 min
May 2, 10:38 PM CDTSevere Thunderstorm WarningSJTHaskell, Jones, Throckmorton67 min
May 2, 10:45 PM CDTSevere Thunderstorm WarningMAFGlasscock, Reagan, Upton45 min
May 2, 10:54 PM CDTTornado WarningSJTCrockett36 min
May 2, 11:27 PM CDTSevere Thunderstorm WarningMAFReagan48 min
May 2, 11:28 PM CDTSevere Thunderstorm WarningSJTCrockett, Schleicher, Sutton47 min
May 2, 11:43 PM CDTSevere Thunderstorm WarningSJTThrockmorton45 min
May 3, 12:11 AM CDTSevere Thunderstorm WarningSJTCrockett, Schleicher, Sutton64 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

Midland Regional, TX (KMAF), launched 12:00Z, 9.7 hours before the alert went out and 150 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 12:00Z on 2018-05-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1275 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 12:00Z on 2018-05-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 300 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
1275 J/kg
Mixed-layer CIN
-197 J/kg
Mixed-layer LCL
1155 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
300 m²/s²
0-3 km storm-relative helicity
303 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 2, 11:36 AM CDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Childress, Collingsworth, Donley and 8 more2 hr
May 2, 12:59 PM CDTTornado WatchSPCArcher, Baylor, Childress, Clay, Collingsworth, Cottle and 14 more9 hr
May 2, 3:13 PM CDTMesoscale DiscussionSPCCoke, Concho, Crockett, Edwards, Glasscock, Irion and 12 more2 hr
May 2, 3:24 PM CDTMesoscale DiscussionSPCArcher, Baylor, Childress, Clay, Collingsworth, Cottle and 9 more3 hr
May 2, 6:10 PM CDTMesoscale DiscussionSPCArcher, Baylor, Foard, Knox, Wichita, Wilbarger95 min

Nearby

Severe Thunderstorm Watches in Texas, 2018Every severe thunderstorm watch in 2018

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.