Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 730

May 23, 201524 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 23, 2015, 8:39 PM CDT for 24 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 23, 2015, 8:39 PM CDT (01:39 UTC)
Expired
May 23, 2015, 10:45 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 24 counties

Atascosa County, TX, Bastrop County, TX, Bee County, TX, Bexar County, TX, Blanco County, TX, Caldwell County, TX, Comal County, TX, DeWitt County, TX, Fayette County, TX, Frio County, TX, Goliad County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Karnes County, TX, Kendall County, TX, La Salle County, TX, Lavaca County, TX, Lee County, TX, Live Oak County, TX, McMullen County, TX, Medina County, TX, Travis County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 65 km from the middle of the area, began a volume at 01:40 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

Corpus Christi, TX (KCRP), launched 00:00Z, 1.7 hours before the alert went out and 176 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, Corpus Christi, TX at 00:00Z on 2015-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1269 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, Corpus Christi, TX at 00:00Z on 2015-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 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
1269 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
1093 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
74 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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 23, 8:57 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Cooke, Denton, Fannin and 7 more93 min
May 23, 9:46 PM CDTMesoscale DiscussionSPCAnderson, Austin, Bell, Bosque, Brazos, Burleson and 28 more89 min
May 23, 10:00 PM CDTTornado WatchSPCAnderson, Austin, Bell, Bosque, Brazos, Burleson and 34 more6 hr
May 23, 10:31 PM CDTSevere Thunderstorm WatchSPCAransas, Brooks, Cameron, Hidalgo, Jim Hogg, Jim Wells and 8 more5 hr
May 23, 11:32 PM CDTMesoscale DiscussionSPCAnderson, Atascosa, Austin, Bell, Brazos, Burleson and 36 more88 min
May 23, 11:52 PM CDTMesoscale DiscussionSPCBrooks, Cameron, Duval, Hidalgo, Jim Wells, Kenedy and 3 more83 min
May 23, 11:59 PM CDTMesoscale DiscussionSPCBandera, Gillespie, Kendall, Kerr, Kinney, Real and 2 more91 min
May 24, 2:12 AM CDTMesoscale DiscussionSPCAransas, Brazoria, Calhoun, Cameron, Fort Bend, Jackson and 4 more93 min
May 24, 3:16 AM CDTMesoscale DiscussionSPCCollin, Fannin, Grayson59 min
May 24, 12:05 PM CDTMesoscale DiscussionSPCBowie, Cass, Marion115 min
May 24, 12:34 PM CDTTornado WatchSPCBowie, Cass, Morris6 hr
May 24, 3:15 PM CDTMesoscale DiscussionSPCArmstrong, Briscoe, Callahan, Childress, Coleman, Collingsworth and 26 more90 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; radar from the NEXRAD Level II archive.