Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 1703

September 16, 201612 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Sep 16, 2016, 7:05 PM CDT for 12 counties in Texas. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Sep 16, 2016, 7:05 PM CDT (00:05 UTC)
Expired: Sep 16, 2016, 9:00 PM CDT
In force: 115 min
Issued by: the Storm Prediction Center

Counties Callahan County, TX, Coke County, TX, Coleman County, TX, Ector County, TX, Glasscock County, TX, Howard County, TX, Midland County, TX, Mitchell County, TX, Nolan County, TX, Runnels County, TX, Sterling County, TX, Taylor County, TX

The radar

The San Angelo radar (KSJT), 76 km from the middle of the area, began a volume at 00:08 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

Midland Regional, TX (KMAF), launched 00:00Z, 0.1 hours before the alert went out and 168 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: 1046 J/kg
Mixed-layer CIN: -147 J/kg
Mixed-layer LCL: 1108 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 7.2

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.

Issued	Product	Office	Counties	Lasted
Sep 17, 1:18 PM CDT	Mesoscale Discussion	SPC	Collingsworth, Wheeler	87 min
Sep 17, 2:38 PM CDT	Mesoscale Discussion	SPC	Dallam, Hartley, Oldham	2 hr
Sep 17, 3:02 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Crane, Culberson, Ector, Gaines, Jeff Davis and 8 more	7 hr
Sep 17, 3:19 PM CDT	Severe Thunderstorm Watch	SPC	Armstrong, Carson, Collingsworth, Dallam, Deaf Smith, Donley and 12 more	10 hr
Sep 17, 5:33 PM CDT	Mesoscale Discussion	SPC	Armstrong, Carson, Dallam, Deaf Smith, Hansford, Hartley and 9 more	117 min
Sep 17, 5:56 PM CDT	Mesoscale Discussion	SPC	Andrews, Borden, Cochran, Crane, Culberson, Dawson and 20 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2016 Every 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.