Alert archive / Texas / Mesoscale Discussions in 2019

Mesoscale Discussion 660

May 17, 20197 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 17, 2019, 9:20 PM CDT for 7 counties in Texas. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: May 17, 2019, 9:20 PM CDT (02:20 UTC)
Expired: May 17, 2019, 10:45 PM CDT
In force: 85 min
Issued by: the Storm Prediction Center

Counties Crockett County, TX, Irion County, TX, Reagan County, TX, Schleicher County, TX, Sutton County, TX, Terrell County, TX, Val Verde County, TX

The radar

The San Angelo radar (KSJT), 121 km from the middle of the area, began a volume at 02:19 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 00:00Z, 2.3 hours before the alert went out and 141 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: 2168 J/kg
Mixed-layer CIN: -203 J/kg
Mixed-layer LCL: 1429 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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
May 17, 11:47 PM CDT	Mesoscale Discussion	SPC	Borden, Brown, Callahan, Coke, Coleman, Concho and 34 more	2 hr
May 18, 1:35 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Borden, Brown, Callahan, Clay and 33 more	2 hr
May 18, 2:20 AM CDT	Tornado Watch	SPC	Archer, Baylor, Borden, Brown, Callahan, Childress and 54 more	8 hr
May 18, 5:11 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Clay, Coke and 34 more	2 hr
May 18, 6:51 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Clay, Coke and 26 more	114 min
May 18, 9:10 AM CDT	Tornado Watch	SPC	Bosque, Brown, Coleman, Collin, Comanche, Concho and 36 more	8 hr
May 18, 12:11 PM CDT	Mesoscale Discussion	SPC	Anderson, Bell, Blanco, Bosque, Bowie, Burnet and 42 more	64 min
May 18, 12:48 PM CDT	Tornado Watch	SPC	Bowie, Camp, Cass, Cherokee, Franklin, Gregg and 9 more	7 hr
May 18, 1:16 PM CDT	Tornado Watch	SPC	Anderson, Bastrop, Bell, Blanco, Brazos, Burleson and 19 more	9 hr
May 18, 3:48 PM CDT	Severe Thunderstorm Watch	SPC	Lipscomb	6 hr
May 18, 5:16 PM CDT	Mesoscale Discussion	SPC	Angelina, Grimes, Houston, Jasper, Nacogdoches, Newton and 9 more	119 min
May 18, 6:37 PM CDT	Mesoscale Discussion	SPC	Cooke, Dallas, Denton, Parker, Tarrant, Wise	53 min

Nearby

Mesoscale Discussions in Texas, 2019 Every mesoscale discussion in 2019

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.