Alert archive / Texas / Mesoscale Discussions in 2017

Mesoscale Discussion 393

April 1, 201723 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 1, 2017, 5:54 PM CDT for 23 counties in Texas. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Apr 1, 2017, 5:54 PM CDT (22:54 UTC)
Expired: Apr 1, 2017, 7:30 PM CDT
In force: 96 min
Issued by: the Storm Prediction Center

All 23 counties

Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crockett County, TX, Eastland County, TX, Irion County, TX, Jones County, TX, Kimble County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Nolan County, TX, Runnels County, TX, Schleicher County, TX, Shackelford County, TX, Stephens County, TX, Sutton County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Young County, TX

The radar

The San Angelo radar (KSJT), 49 km from the middle of the area, began a volume at 22:56 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 12:00Z, 10.9 hours before the alert went out and 205 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2624 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: -129 m²/s²
0-3 km storm-relative helicity: -2 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.

Issued	Product	Office	Counties	Lasted
Mar 31, 11:07 PM CDT	Mesoscale Discussion	SPC	Armstrong, Carson, Donley, Gray, Hansford, Hemphill and 8 more	83 min
Apr 1, 2:31 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Clay, Coke and 21 more	2 hr
Apr 1, 3:23 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Callahan, Coke, Coleman, Concho, Eastland and 12 more	9 hr

Nearby

Mesoscale Discussions in Texas, 2017 Every mesoscale discussion in 2017

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.