Alert archive / Texas / Mesoscale Discussions in 2012

Mesoscale Discussion 1146

June 12, 20126 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2012, 7:21 PM CDT for 6 counties in Texas. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: Jun 12, 2012, 7:21 PM CDT (00:21 UTC)
Expired: Jun 12, 2012, 8:15 PM CDT
In force: 54 min
Issued by: the Storm Prediction Center

Counties Austin County, TX, Colorado County, TX, Fayette County, TX, Jackson County, TX, Lavaca County, TX, Wharton County, TX

The radar

The Houston radar (KHGX), 133 km from the middle of the area, began a volume at 00:24 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 00:00Z, 0.4 hours before the alert went out and 379 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: 126 J/kg
Mixed-layer CIN: -423 J/kg
Mixed-layer LCL: 1649 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 29 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, 7:38 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
Jun 13, 5:17 PM CDT	Mesoscale Discussion	SPC	Anderson, Bosque, Cherokee, Dallas, Denton, Ellis and 19 more	58 min

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.