Alert archive / Texas / Mesoscale Discussions in 2017

Mesoscale Discussion 358

March 28, 201713 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 28, 2017, 6:04 PM CDT for 13 counties in Texas. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Mar 28, 2017, 6:04 PM CDT (23:04 UTC)
Expired: Mar 28, 2017, 8:00 PM CDT
In force: 116 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Bandera County, TX, Burnet County, TX, Edwards County, TX, Gillespie County, TX, Kerr County, TX, Kimble County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, Menard County, TX, Real County, TX, San Saba County, TX, Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 117 km from the middle of the area, began a volume at 23:06 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 96Mar 28, 9:25 PM CDT

The nearest sounding before it

Del Rio, TX (KDLF), launched 12:00Z, 11.1 hours before the alert went out and 129 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: 1689 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 632 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 223 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 6.1

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 28, 9:30 AM CDT	Mesoscale Discussion	SPC	Armstrong, Briscoe, Carson, Castro, Deaf Smith, Donley and 16 more	3 hr
Mar 28, 12:23 PM CDT	Mesoscale Discussion	SPC	Bailey, Borden, Briscoe, Castro, Cochran, Cottle and 23 more	67 min
Mar 28, 12:51 PM CDT	Severe Thunderstorm Watch	SPC	Armstrong, Briscoe, Carson, Castro, Childress, Collingsworth and 34 more	8 hr
Mar 28, 1:25 PM CDT	Mesoscale Discussion	SPC	Coke, Crane, Crockett, Ector, Glasscock, Howard and 8 more	95 min
Mar 28, 1:51 PM CDT	Severe Thunderstorm Watch	SPC	Borden, Callahan, Coke, Coleman, Concho, Crockett and 24 more	8 hr
Mar 28, 2:44 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Callahan, Clay, Eastland, Fisher and 19 more	3 hr
Mar 28, 2:44 PM CDT	Mesoscale Discussion	SPC	Armstrong, Baylor, Briscoe, Carson, Childress, Collingsworth and 21 more	2 hr
Mar 28, 3:40 PM CDT	Tornado Watch	SPC	Archer, Baylor, Brown, Callahan, Childress, Clay and 33 more	7 hr
Mar 28, 5:31 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Jack, Montague, Palo Pinto and 7 more	89 min
Mar 28, 6:30 PM CDT	Mesoscale Discussion	SPC	Coke, Crockett, Glasscock, Howard, Irion, Mitchell and 4 more	90 min

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.