Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 1667

August 12, 201532 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Aug 12, 2015, 4:07 PM CDT for 32 counties in Texas. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued
Aug 12, 2015, 4:07 PM CDT (21:07 UTC)
Expired
Aug 12, 2015, 5:00 PM CDT
In force
53 min
Issued by
the Storm Prediction Center
Chance of a watch
5%
All 32 counties

Atascosa County, TX, Bandera County, TX, Bexar County, TX, Blanco County, TX, Comal County, TX, Crockett County, TX, Dimmit County, TX, Edwards County, TX, Frio County, TX, Gillespie County, TX, Guadalupe County, TX, Irion County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, La Salle County, TX, Mason County, TX, Maverick County, TX, Medina County, TX, Menard County, TX, Pecos County, TX, Reagan County, TX, Real County, TX, Schleicher County, TX, Sutton County, TX, Terrell County, TX, Upton County, TX, Uvalde County, TX, Val Verde County, TX, Wilson County, TX, Zavala County, TX

The radar

The Laughlin AFB radar (KDFX), 73 km from the middle of the area, began a volume at 21:07 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

Del Rio, TX (KDLF), launched 12:00Z, 9.1 hours before the alert went out and 62 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 2015-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 289 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 2015-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -78 square meters per square second.1939Sfc1 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
289 J/kg
Mixed-layer CIN
-213 J/kg
Mixed-layer LCL
1698 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-78 m²/s²
0-3 km storm-relative helicity
-41 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

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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.