Alert archive / Texas / Mesoscale Discussions in 2019

Mesoscale Discussion 663

May 17, 201940 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 17, 2019, 11:47 PM CDT for 40 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 17, 2019, 11:47 PM CDT (04:47 UTC)
Expired
May 18, 2019, 2:15 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
60%
All 40 counties

Borden County, TX, Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crane County, TX, Crockett County, TX, Eastland County, TX, Fisher County, TX, Glasscock County, TX, Haskell County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kent County, TX, Martin County, TX, McCulloch County, TX, Menard County, TX, Midland County, TX, Mitchell County, TX, Nolan County, TX, Palo Pinto 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, Young County, TX

The radar

The San Angelo radar (KSJT), 59 km from the middle of the area, began a volume at 04:49 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.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 4.8 hours before the alert went out and 122 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 2019-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 706 joules per kilogram.LCLEL10008507005003002001001 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 2019-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 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
706 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
2606 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
15 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 17, 9:20 PM CDTMesoscale DiscussionSPCCrockett, Irion, Reagan, Schleicher, Sutton, Terrell and 1 more85 min
May 18, 1:35 AM CDTMesoscale DiscussionSPCArcher, Baylor, Borden, Brown, Callahan, Clay and 33 more2 hr
May 18, 2:20 AM CDTTornado WatchSPCArcher, Baylor, Borden, Brown, Callahan, Childress and 54 more8 hr
May 18, 5:11 AM CDTMesoscale DiscussionSPCArcher, Baylor, Brown, Callahan, Clay, Coke and 34 more2 hr
May 18, 6:51 AM CDTMesoscale DiscussionSPCArcher, Baylor, Brown, Callahan, Clay, Coke and 26 more114 min
May 18, 9:10 AM CDTTornado WatchSPCBosque, Brown, Coleman, Collin, Comanche, Concho and 36 more8 hr
May 18, 12:11 PM CDTMesoscale DiscussionSPCAnderson, Bell, Blanco, Bosque, Bowie, Burnet and 42 more64 min
May 18, 12:48 PM CDTTornado WatchSPCBowie, Camp, Cass, Cherokee, Franklin, Gregg and 9 more7 hr
May 18, 1:16 PM CDTTornado WatchSPCAnderson, Bastrop, Bell, Blanco, Brazos, Burleson and 19 more9 hr
May 18, 3:48 PM CDTSevere Thunderstorm WatchSPCLipscomb6 hr
May 18, 5:16 PM CDTMesoscale DiscussionSPCAngelina, Grimes, Houston, Jasper, Nacogdoches, Newton and 9 more119 min
May 18, 6:37 PM CDTMesoscale DiscussionSPCCooke, Dallas, Denton, Parker, Tarrant, Wise53 min

Nearby

Mesoscale Discussions in Texas, 2019Every mesoscale discussion in 2019

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.