Alert archive / Texas / Severe Thunderstorm Watches in 2015

Severe Thunderstorm Watch 62

April 16, 20157 counties in Oklahoma; 51 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Apr 16, 2015, 4:40 PM CDT for 7 counties in Oklahoma; 51 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Apr 16, 2015, 4:40 PM CDT (21:40 UTC)
Expired
Apr 17, 2015, 12:00 AM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
60 kt
All 58 counties

Comanche County, OK, Cotton County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Briscoe County, TX, Brown County, TX, Callahan County, TX, Castro County, TX, Childress County, TX, Clay County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Fisher County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Hale County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Hockley County, TX, Jones County, TX, Kent County, TX, Kimble County, TX, King County, TX, Knox County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Mitchell County, TX, Motley County, TX, Nolan County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Scurry County, TX, Shackelford County, TX, Stonewall County, TX, Sutton County, TX, Swisher County, TX, Taylor County, TX, Terry County, TX, Throckmorton County, TX, Tom Green County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Dyess AFB radar (KDYX), 112 km from the middle of the area, began a volume at 21:43 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
5%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
70%
One or more hailstones of 2 inches or more
40%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 16, 4:43 PM CDTSevere Thunderstorm WarningLUBDickens32 min
Apr 16, 4:54 PM CDTSevere Thunderstorm WarningSJTFisher, Nolan51 min
Apr 16, 4:55 PM CDTSevere Thunderstorm WarningSJTFisher50 min
Apr 16, 5:09 PM CDTSevere Thunderstorm WarningLUBFloyd, Motley36 min
Apr 16, 5:11 PM CDTSevere Thunderstorm WarningSJTColeman, Concho, Runnels, Tom Green49 min
Apr 16, 5:34 PM CDTSevere Thunderstorm WarningSJTHaskell, Jones41 min
Apr 16, 5:37 PM CDTSevere Thunderstorm WarningSJTColeman, Runnels38 min
Apr 16, 5:42 PM CDTSevere Thunderstorm WarningSJTFisher, Nolan48 min
Apr 16, 5:44 PM CDTSevere Thunderstorm WarningLUBHall, Motley31 min
Apr 16, 5:58 PM CDTSevere Thunderstorm WarningSJTColeman, Concho, Runnels, Tom Green47 min
Apr 16, 6:12 PM CDTSevere Thunderstorm WarningSJTCallahan, Coleman, Runnels, Taylor48 min
Apr 16, 6:12 PM CDTSevere Thunderstorm WarningSJTHaskell48 min
Apr 16, 6:19 PM CDTSevere Thunderstorm WarningSJTHaskell, Throckmorton41 min
Apr 16, 6:25 PM CDTSevere Thunderstorm WarningOUNBeckham, Greer, Roger Mills50 min
Apr 16, 6:31 PM CDTSevere Thunderstorm WarningOUNGreer, Harmon44 min
Apr 16, 6:41 PM CDTSevere Thunderstorm WarningLUBCastro, Lamb49 min
Apr 16, 6:56 PM CDTSevere Thunderstorm WarningSJTFisher49 min
Apr 16, 6:58 PM CDTSevere Thunderstorm WarningSJTHaskell, Shackelford, Throckmorton47 min
Apr 16, 7:10 PM CDTSevere Thunderstorm WarningSJTShackelford, Throckmorton39 min
Apr 16, 7:11 PM CDTSevere Thunderstorm WarningSJTJones, Taylor49 min
Apr 16, 7:26 PM CDTSevere Thunderstorm WarningSJTFisher, Jones49 min
Apr 16, 7:32 PM CDTSevere Thunderstorm WarningOUNBeckham, Greer43 min
Apr 16, 7:47 PM CDTSevere Thunderstorm WarningLUBLynn28 min
Apr 16, 8:14 PM CDTSevere Thunderstorm WarningLUBLynn31 min
Apr 16, 8:19 PM CDTSevere Thunderstorm WarningLUBLynn, Terry26 min
Apr 16, 8:44 PM CDTSevere Thunderstorm WarningLUBCrosby, Garza, Lubbock, Lynn16 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 210 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 2015-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 97 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 2015-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 165 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
97 J/kg
Mixed-layer CIN
-316 J/kg
Mixed-layer LCL
2063 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
165 m²/s²
0-3 km storm-relative helicity
200 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
Apr 16, 12:17 PM CDTMesoscale DiscussionSPCBeaver, Harper118 min
Apr 16, 1:48 PM CDTTornado WatchSPCBeaver, Texas8 hr
Apr 16, 2:42 PM CDTMesoscale DiscussionSPCLove63 min
Apr 16, 4:06 PM CDTMesoscale DiscussionSPCJackson2 hr
Apr 16, 4:44 PM CDTMesoscale DiscussionSPCBeckham, Blaine, Custer, Dewey, Ellis, Greer and 7 more3 hr
Apr 16, 4:59 PM CDTSevere Thunderstorm WatchSPCAlfalfa, Beckham, Blaine, Caddo, Custer, Dewey and 9 more7 hr
Apr 16, 5:06 PM CDTMesoscale DiscussionSPCBeaver, Texas84 min
Apr 16, 5:29 PM CDTMesoscale DiscussionSPCCimarron91 min
Apr 16, 5:41 PM CDTMesoscale DiscussionSPCBeckham, Roger Mills94 min
Apr 16, 6:09 PM CDTTornado WatchSPCBeckham, Ellis, Greer, Harmon, Roger Mills6 hr
Apr 16, 12:49 PM CDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Castro, Crosby, Donley and 15 more116 min
Apr 16, 1:34 PM CDTMesoscale DiscussionSPCAustin, Bastrop, Bell, Bexar, Blanco, Bosque and 48 more116 min
Apr 16, 2:22 PM CDTSevere Thunderstorm WatchSPCAnderson, Aransas, Austin, Bastrop, Bee, Bell and 81 more8 hr
Apr 16, 4:59 PM CDTMesoscale DiscussionSPCAngelina, Cherokee, Gregg, Hardin, Houston, Jasper and 12 more91 min
Apr 16, 6:19 PM CDTMesoscale DiscussionSPCAnderson, Aransas, Austin, Bastrop, Bell, Bexar and 84 more86 min

Nearby

Severe Thunderstorm Watches in Texas, 2015Severe Thunderstorm Watches in Oklahoma, 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.