Alert archive / Texas / Mesoscale Discussions in 2012

Mesoscale Discussion 1153

June 13, 201225 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 13, 2012, 5:17 PM CDT for 25 counties in Texas. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: Jun 13, 2012, 5:17 PM CDT (22:17 UTC)
Expired: Jun 13, 2012, 6:15 PM CDT
In force: 58 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 25 counties

Anderson County, TX, Bosque County, TX, Cherokee County, TX, Dallas County, TX, Denton County, TX, Ellis County, TX, Erath County, TX, Freestone County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, Navarro County, TX, Palo Pinto County, TX, Parker County, TX, Rains County, TX, Rockwall County, TX, Smith County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Van Zandt County, TX, Wise County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 49 km from the middle of the area, began a volume at 22:19 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

Fort Worth, TX (KFWD), launched 12:00Z, 10.3 hours before the alert went out and 60 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: 539 J/kg
Mixed-layer CIN: -140 J/kg
Mixed-layer LCL: 888 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 14 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 12, 7:21 PM CDT	Mesoscale Discussion	SPC	Austin, Colorado, Fayette, Jackson, Lavaca, Wharton	54 min
Jun 12, 7:38 PM CDT	Mesoscale Discussion	SPC	Culberson, Jeff Davis, Loving, Reeves, Ward, Winkler	67 min
Jun 12, 9:11 PM CDT	Mesoscale Discussion	SPC	Andrews, Armstrong, Bailey, Borden, Briscoe, Carson and 28 more	34 min
Jun 12, 9:26 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Armstrong, Bailey, Borden, Briscoe, Carson and 43 more	7 hr
Jun 12, 11:11 PM CDT	Mesoscale Discussion	SPC	Andrews, Armstrong, Bailey, Borden, Briscoe, Carson and 38 more	64 min
Jun 13, 1:51 PM CDT	Mesoscale Discussion	SPC	Dallam, Deaf Smith, Hartley, Oldham, Parmer	54 min
Jun 13, 2:04 PM CDT	Mesoscale Discussion	SPC	Brewster, Culberson, Jeff Davis, Loving, Pecos, Presidio and 3 more	56 min
Jun 13, 3:40 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Brewster, Crane, Culberson, Dawson, Ector and 12 more	7 hr

Nearby

Mesoscale Discussions in Texas, 2012 Every mesoscale discussion in 2012

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.