Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 928

June 1, 201315 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2013, 5:18 PM CDT for 15 counties in Texas. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: Jun 1, 2013, 5:18 PM CDT (22:18 UTC)
Expired: Jun 1, 2013, 6:15 PM CDT
In force: 57 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

Counties Blanco County, TX, Burnet County, TX, Crockett County, TX, Edwards County, TX, Gillespie County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Llano County, TX, Mason County, TX, Menard County, TX, Real County, TX, Schleicher County, TX, Sutton County, TX, Val Verde County, TX

The radar

The San Angelo radar (KSJT), 151 km from the middle of the area, began a volume at 22:20 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.

Severe Thunderstorm Watch 270Jun 1, 5:35 PM CDT

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 10.3 hours before the alert went out and 181 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2495 J/kg
Mixed-layer CIN: -302 J/kg
Mixed-layer LCL: 725 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 143 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, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 1, 5:35 PM CDT	Severe Thunderstorm Watch	SPC	Bandera, Bexar, Blanco, Brewster, Burnet, Caldwell and 28 more	7 hr
Jun 1, 5:53 PM CDT	Mesoscale Discussion	SPC	Anderson, Bell, Cherokee, Falls, Freestone, Gregg and 19 more	67 min

Nearby

Mesoscale Discussions in Texas, 2013 Every 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.