Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 734

May 23, 201542 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 23, 2015, 11:32 PM CDT for 42 counties in Texas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
May 23, 2015, 11:32 PM CDT (04:32 UTC)
Expired
May 24, 2015, 1:00 AM CDT
In force
88 min
Issued by
the Storm Prediction Center
All 42 counties

Anderson County, TX, Atascosa County, TX, Austin County, TX, Bell County, TX, Brazos County, TX, Burleson County, TX, Collin County, TX, Colorado County, TX, Dallas County, TX, Delta County, TX, DeWitt County, TX, Ellis County, TX, Falls County, TX, Fayette County, TX, Freestone County, TX, Frio County, TX, Gonzales County, TX, Grimes County, TX, Guadalupe County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Houston County, TX, Hunt County, TX, Karnes County, TX, Kaufman County, TX, Lavaca County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, Madison County, TX, McLennan County, TX, Milam County, TX, Navarro County, TX, Rains County, TX, Robertson County, TX, Rockwall County, TX, Van Zandt County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wilson County, TX

The radar

The Ft Hood radar (KGRK), 44 km from the middle of the area, began a volume at 04:31 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 nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 4.5 hours before the alert went out and 213 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, Fort Worth, TX at 00:00Z on 2015-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 537 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, Fort Worth, TX at 00:00Z on 2015-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 197 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
537 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
858 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
197 m²/s²
0-3 km storm-relative helicity
288 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.7

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, 8:39 PM CDTMesoscale DiscussionSPCAtascosa, Bastrop, Bee, Bexar, Blanco, Caldwell and 18 more2 hr
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, 11:52 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.