Alert archive / Texas / Mesoscale Discussions in 2019

Mesoscale Discussion 1124

June 18, 201927 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2019, 4:48 PM CDT for 27 counties in Texas. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: Jun 18, 2019, 4:48 PM CDT (21:48 UTC)
Expired: Jun 18, 2019, 5:45 PM CDT
In force: 57 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 27 counties

Armstrong County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Deaf Smith County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Garza County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hockley County, TX, Kent County, TX, King County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Motley County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Swisher County, TX

The radar

The Lubbock radar (KLBB), 92 km from the middle of the area, began a volume at 21:50 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 397Jun 18, 5:35 PM CDT

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 9.8 hours before the alert went out and 283 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: 888 J/kg
Mixed-layer CIN: -202 J/kg
Mixed-layer LCL: 1006 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 187 m²/s²
0-3 km storm-relative helicity: 315 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.9

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
Jun 17, 9:15 PM CDT	Mesoscale Discussion	SPC	Andrews, Bailey, Borden, Castro, Cochran, Dawson and 22 more	90 min
Jun 17, 10:01 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Bailey, Borden, Cochran, Crosby, Dawson and 13 more	5 hr
Jun 17, 11:57 PM CDT	Mesoscale Discussion	SPC	Andrews, Bailey, Borden, Cochran, Crosby, Dawson and 16 more	93 min
Jun 18, 2:08 AM CDT	Mesoscale Discussion	SPC	Borden, Dawson, Fisher, Gaines, Scurry, Stonewall and 1 more	67 min
Jun 18, 1:25 PM CDT	Mesoscale Discussion	SPC	Andrews, Bailey, Brewster, Castro, Cochran, Crane and 22 more	3 hr
Jun 18, 2:20 PM CDT	Mesoscale Discussion	SPC	Baylor, Borden, Coke, Cottle, Crosby, Dickens and 20 more	115 min
Jun 18, 2:22 PM CDT	Mesoscale Discussion	SPC	Dallam, Hansford, Sherman	83 min
Jun 18, 3:37 PM CDT	Severe Thunderstorm Watch	SPC	Dallam, Hansford, Hartley, Hutchinson, Moore, Sherman	7 hr
Jun 18, 5:36 PM CDT	Severe Thunderstorm Watch	SPC	Armstrong, Bailey, Briscoe, Carson, Castro, Childress and 32 more	7 hr

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.