Alert archive / Texas / Mesoscale Discussions in 2014

Mesoscale Discussion 537

May 9, 201451 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 9, 2014, 2:00 PM CDT for 51 counties in Texas. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
May 9, 2014, 2:00 PM CDT (19:00 UTC)
Expired
May 9, 2014, 3:30 PM CDT
In force
90 min
Issued by
the Storm Prediction Center
All 51 counties

Anderson County, TX, Atascosa County, TX, Austin County, TX, Bandera County, TX, Bastrop County, TX, Bell County, TX, Bexar County, TX, Blanco County, TX, Brazos County, TX, Burleson County, TX, Burnet County, TX, Caldwell County, TX, Comal County, TX, DeWitt County, TX, Dimmit County, TX, Edwards County, TX, Falls County, TX, Fayette County, TX, Freestone County, TX, Frio County, TX, Gillespie County, TX, Gonzales County, TX, Grimes County, TX, Guadalupe County, TX, Hays County, TX, Houston County, TX, Karnes County, TX, Kendall County, TX, Kerr County, TX, Kinney County, TX, La Salle County, TX, Lavaca County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, Llano County, TX, Madison County, TX, Maverick County, TX, Medina County, TX, Milam County, TX, Real County, TX, Robertson County, TX, Travis County, TX, Trinity County, TX, Uvalde County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Williamson County, TX, Wilson County, TX, Zavala County, TX

The radar

The Austin/San Antonio radar (KEWX), 35 km from the middle of the area, began a volume at 19:04 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

Corpus Christi, TX (KCRP), launched 12:00Z, 7.0 hours before the alert went out and 265 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 2014-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1727 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 2014-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 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
1727 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
456 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
69 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.3

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 8, 8:20 PM CDTMesoscale DiscussionSPCBell, Blanco, Burnet, Comal, Falls, Gillespie and 8 more55 min
May 8, 9:41 PM CDTMesoscale DiscussionSPCBell, Blanco, Burnet, Falls, Gillespie, Hays and 5 more64 min
May 9, 9:46 AM CDTMesoscale DiscussionSPCBandera, Kerr, Kinney, Maverick, Medina, Real and 2 more2 hr
May 9, 10:39 AM CDTSevere Thunderstorm WatchSPCAtascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 26 more6 hr
May 9, 3:18 PM CDTMesoscale DiscussionSPCAngelina, Bowie, Camp, Cass, Cherokee, Franklin and 14 more117 min
May 9, 4:34 PM CDTMesoscale DiscussionSPCBee, Brooks, Duval, Jim Hogg, Jim Wells, Kleberg and 6 more116 min
May 9, 4:55 PM CDTSevere Thunderstorm WatchSPCBrooks, Cameron, Duval, Hidalgo, Jim Hogg, Jim Wells and 7 more6 hr
May 9, 6:14 PM CDTMesoscale DiscussionSPCAnderson, Bowie, Camp, Cass, Cherokee, Ellis and 18 more61 min

Nearby

Mesoscale Discussions in Texas, 2014Every mesoscale discussion in 2014

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.