Alert archive / Texas / Mesoscale Discussions in 2017

Mesoscale Discussion 791

May 19, 201717 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 19, 2017, 7:15 PM CDT for 17 counties in Texas. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued: May 19, 2017, 7:15 PM CDT (00:15 UTC)
Expired: May 19, 2017, 8:15 PM CDT
In force: 60 min
Issued by: the Storm Prediction Center

Counties Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Fisher County, TX, Irion County, TX, Jones County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Nolan County, TX, Runnels County, TX, Schleicher County, TX, Shackelford County, TX, Taylor County, TX, Tom Green County, TX

The radar

The San Angelo radar (KSJT), 59 km from the middle of the area, began a volume at 00:14 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.

Tornado Watch 251May 19, 7:45 PM CDT

The nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 0.3 hours before the alert went out and 214 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: 3843 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 85 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
May 19, 7:44 PM CDT	Tornado Watch	SPC	Brown, Callahan, Coke, Coleman, Concho, Fisher and 15 more	7 hr
May 19, 11:05 PM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coke, Coleman, Comanche, Concho and 14 more	115 min
May 20, 7:41 AM CDT	Mesoscale Discussion	SPC	Aransas, Atascosa, Bandera, Bee, Bexar, Caldwell and 21 more	94 min
May 20, 10:15 AM CDT	Severe Thunderstorm Watch	SPC	Atascosa, Bee, Bexar, DeWitt, Dimmit, Duval and 18 more	11 hr
May 20, 12:56 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bee, Bexar, DeWitt, Dimmit, Frio and 13 more	94 min
May 20, 3:46 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bee, Bexar, DeWitt, Dimmit, Duval and 19 more	59 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.