Alert archive / Texas / Mesoscale Discussions in 2014

Mesoscale Discussion 378

April 21, 201421 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 21, 2014, 7:13 PM CDT for 21 counties in Texas. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Apr 21, 2014, 7:13 PM CDT (00:13 UTC)
Expired
Apr 21, 2014, 8:45 PM CDT
In force
92 min
Issued by
the Storm Prediction Center
All 21 counties

Bandera County, TX, Bell County, TX, Bexar County, TX, Blanco County, TX, Burnet County, TX, Comal County, TX, Coryell County, TX, Ellis County, TX, Gillespie County, TX, Hill County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McLennan County, TX, Medina County, TX, Menard County, TX, Navarro County, TX, Sutton County, TX

The radar

The Ft Hood radar (KGRK), 118 km from the middle of the area, began a volume at 00:17 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 00:00Z, 0.2 hours before the alert went out and 262 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 00:00Z on 2014-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1322 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 00:00Z on 2014-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 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
1322 J/kg
Mixed-layer CIN
-165 J/kg
Mixed-layer LCL
1604 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
54 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

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
Apr 21, 9:10 PM CDTMesoscale DiscussionSPCBandera, Bastrop, Bell, Bexar, Blanco, Burnet and 19 more65 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.