Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 359

March 31, 201324 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2013, 5:24 PM CDT for 24 counties in Texas. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued
Mar 31, 2013, 5:24 PM CDT (22:24 UTC)
Expired
Mar 31, 2013, 7:00 PM CDT
In force
96 min
Issued by
the Storm Prediction Center
All 24 counties

Atascosa County, TX, Brazoria County, TX, Chambers County, TX, DeWitt County, TX, Dimmit County, TX, Fort Bend County, TX, Frio County, TX, Galveston County, TX, Goliad County, TX, Jackson County, TX, Jefferson County, TX, Karnes County, TX, Kinney County, TX, La Salle County, TX, Lavaca County, TX, Live Oak County, TX, Maverick County, TX, McMullen County, TX, Medina County, TX, Uvalde County, TX, Victoria County, TX, Wharton County, TX, Wilson County, TX, Zavala County, TX

The radar

The Austin/San Antonio radar (KEWX), 76 km from the middle of the area, began a volume at 22:24 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 12:00Z, 10.4 hours before the alert went out and 156 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 12:00Z on 2013-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 182 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 12:00Z on 2013-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
182 J/kg
Mixed-layer CIN
-413 J/kg
Mixed-layer LCL
865 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
6 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Mar 30, 8:14 PM CDTMesoscale DiscussionSPCClay, Montague, Wichita, Wilbarger91 min
Mar 31, 1:13 AM CDTMesoscale DiscussionSPCWheeler62 min
Mar 31, 4:54 AM CDTMesoscale DiscussionSPCClay, Collin, Cooke, Delta, Denton, Fannin and 8 more96 min
Mar 31, 5:10 AM CDTSevere Thunderstorm WatchSPCAnderson, Bosque, Bowie, Camp, Cass, Cherokee and 44 more7 hr
Mar 31, 7:36 AM CDTMesoscale DiscussionSPCAnderson, Bowie, Camp, Cass, Cherokee, Collin and 34 more114 min
Mar 31, 9:20 AM CDTSevere Thunderstorm WatchSPCAngelina, Sabine, San Augustine5 hr
Mar 31, 10:33 AM CDTMesoscale DiscussionSPCAnderson, Cherokee, Gregg, Harrison, Nacogdoches, Panola and 2 more57 min
Mar 31, 11:54 AM CDTMesoscale DiscussionSPCAngelina, Jasper, Newton, Sabine, San Augustine, Shelby and 1 more36 min
Mar 31, 12:17 PM CDTSevere Thunderstorm WatchSPCAngelina, Hardin, Houston, Jasper, Newton, Polk and 5 more6 hr
Mar 31, 1:00 PM CDTMesoscale DiscussionSPCAustin, Bandera, Bastrop, Bexar, Blanco, Brazos and 32 more60 min
Mar 31, 1:17 PM CDTSevere Thunderstorm WatchSPCAtascosa, Austin, Bandera, Bastrop, Bell, Bexar and 47 more9 hr
Mar 31, 2:32 PM CDTMesoscale DiscussionSPCAngelina, Hardin, Jasper, Liberty, Nacogdoches, Newton and 8 more58 min
Mar 31, 2:48 PM CDTSevere Thunderstorm WatchSPCBrazoria, Chambers, Colorado, Fort Bend, Galveston, Harris and 4 more5 hr
Mar 31, 6:20 PM CDTSevere Thunderstorm WatchSPCBee, Duval, Jim Wells, Kleberg, La Salle, Live Oak and 4 more4 hr

Nearby

Mesoscale Discussions in Texas, 2013Every mesoscale discussion in 2013

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.