Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 663

May 16, 201524 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 16, 2015, 2:43 PM CDT for 24 counties in Texas. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
May 16, 2015, 2:43 PM CDT (19:43 UTC)
Expired
May 16, 2015, 4:15 PM CDT
In force
92 min
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 24 counties

Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crockett County, TX, Glasscock County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kimble County, TX, McCulloch County, TX, Menard County, TX, Mitchell County, TX, Nolan County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Sterling County, TX, Sutton County, TX, Taylor County, TX, Terrell County, TX, Tom Green County, TX, Upton County, TX, Val Verde County, TX

The watches that followed

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

The nearest sounding before it

Del Rio, TX (KDLF), launched 12:00Z, 7.7 hours before the alert went out and 221 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, Del Rio, TX at 12:00Z on 2015-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1300 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, Del Rio, TX at 12:00Z on 2015-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 138 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
1300 J/kg
Mixed-layer CIN
-137 J/kg
Mixed-layer LCL
482 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
138 m²/s²
0-3 km storm-relative helicity
272 m²/s²
Significant tornado parameter
0.4
Supercell composite
1.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 15, 8:05 PM CDTMesoscale DiscussionSPCArmstrong, Bailey, Briscoe, Carson, Castro, Childress and 31 more2 hr
May 15, 10:53 PM CDTSevere Thunderstorm WatchSPCArmstrong, Bailey, Briscoe, Carson, Castro, Childress and 28 more5 hr
May 16, 1:32 AM CDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Childress, Collingsworth, Cottle and 17 more88 min
May 16, 11:57 AM CDTMesoscale DiscussionSPCArmstrong, Baylor, Borden, Briscoe, Callahan, Childress and 36 more2 hr
May 16, 12:01 PM CDTMesoscale DiscussionSPCCarson, Dallam, Deaf Smith, Hansford, Hartley, Hutchinson and 6 more89 min
May 16, 12:58 PM CDTTornado WatchSPCArcher, Armstrong, Baylor, Briscoe, Carson, Castro and 33 more6 hr
May 16, 3:41 PM CDTMesoscale DiscussionSPCArcher, Armstrong, Baylor, Briscoe, Carson, Childress and 24 more94 min
May 16, 4:00 PM CDTTornado WatchSPCArcher, Baylor, Clay, Foard, Knox, Wichita and 1 more8 hr
May 16, 5:47 PM CDTTornado WatchSPCBrown, Callahan, Coke, Coleman, Comanche, Cooke and 21 more5 hr
May 16, 5:55 PM CDTMesoscale DiscussionSPCArcher, Baylor, Childress, Clay, Collingsworth, Cooke and 13 more95 min

Nearby

Mesoscale Discussions in Texas, 2015Every mesoscale discussion 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.