Alert archive / Texas / Mesoscale Discussions in 2017

Mesoscale Discussion 685

May 10, 20174 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 10, 2017, 2:25 PM CDT for 4 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: May 10, 2017, 2:25 PM CDT (19:25 UTC)
Expired: May 10, 2017, 5:00 PM CDT
In force: 3 hr
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Menard County, TX, Schleicher County, TX, Sutton County, TX, Val Verde County, TX

The radar

The San Angelo radar (KSJT), 116 km from the middle of the area, began a volume at 19:28 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

Del Rio, TX (KDLF), launched 12:00Z, 7.4 hours before the alert went out and 109 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: 557 J/kg
Mixed-layer CIN: -169 J/kg
Mixed-layer LCL: 871 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 190 m²/s²
0-3 km storm-relative helicity: 193 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 6.6

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
May 9, 8:41 PM CDT	Mesoscale Discussion	SPC	Andrews, Bailey, Castro, Cochran, Deaf Smith, Ector and 10 more	2 hr
May 9, 10:17 PM CDT	Mesoscale Discussion	SPC	Andrews, Armstrong, Bailey, Briscoe, Carson, Castro and 19 more	28 min
May 9, 10:59 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Armstrong, Bailey, Borden, Briscoe, Carson and 52 more	8 hr
May 10, 2:04 AM CDT	Mesoscale Discussion	SPC	Andrews, Armstrong, Bailey, Briscoe, Castro, Cochran and 21 more	86 min
May 10, 6:04 AM CDT	Mesoscale Discussion	SPC	Collingsworth, Hemphill, Lipscomb, Wheeler	116 min
May 10, 2:14 PM CDT	Mesoscale Discussion	SPC	Baylor, Briscoe, Childress, Collingsworth, Cottle, Donley and 10 more	61 min
May 10, 2:43 PM CDT	Tornado Watch	SPC	Archer, Baylor, Briscoe, Childress, Cottle, Dickens and 13 more	7 hr
May 10, 3:11 PM CDT	Mesoscale Discussion	SPC	Armstrong, Carson, Collingsworth, Donley, Gray, Hansford and 10 more	94 min
May 10, 5:27 PM CDT	Severe Thunderstorm Watch	SPC	Armstrong, Carson, Collingsworth, Donley, Gray, Hansford and 7 more	3 hr
May 10, 5:58 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Collingsworth, Donley, Foard, Hardeman and 3 more	2 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.