Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 443

April 25, 201615 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2016, 3:47 PM CDT for 15 counties in Texas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Apr 25, 2016, 3:47 PM CDT (20:47 UTC)
Expired
Apr 25, 2016, 5:15 PM CDT
In force
88 min
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties Atascosa County, TX, Bandera County, TX, Bexar County, TX, Blanco County, TX, Frio County, TX, Gillespie County, TX, Kendall County, TX, Kerr County, TX, La Salle County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, McMullen County, TX, Medina County, TX, San Saba County, TX

The radar

The Austin/San Antonio radar (KEWX), 99 km from the middle of the area, began a volume at 20:53 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, 8.8 hours before the alert went out and 186 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 2016-04-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 851 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 2016-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 212 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
851 J/kg
Mixed-layer CIN
-363 J/kg
Mixed-layer LCL
693 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
212 m²/s²
0-3 km storm-relative helicity
273 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 25, 6:48 PM CDTMesoscale DiscussionSPCAtascosa, Bee, Bexar, Blanco, Caldwell, Comal and 13 more57 min

Nearby

Mesoscale Discussions in Texas, 2016Every mesoscale discussion in 2016

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.