Alert archive / Texas / Mesoscale Discussions in 2020

Mesoscale Discussion 684

May 23, 202016 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 23, 2020, 2:12 PM CDT for 16 counties in Texas. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: May 23, 2020, 2:12 PM CDT (19:12 UTC)
Expired: May 23, 2020, 3:45 PM CDT
In force: 93 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch needed soon
Chance of a watch: 95%

Counties Brewster County, TX, Coke County, TX, Crane County, TX, Crockett County, TX, Ector County, TX, Glasscock County, TX, Howard County, TX, Irion County, TX, Martin County, TX, Midland County, TX, Pecos County, TX, Reagan County, TX, Sterling County, TX, Terrell County, TX, Upton County, TX, Val Verde County, TX

The radar

The Midland/Odessa radar (KMAF), 186 km from the middle of the area, began a volume at 19:12 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 209May 23, 2:30 PM CDT

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 7.2 hours before the alert went out and 187 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: 805 J/kg
Mixed-layer CIN: -308 J/kg
Mixed-layer LCL: 2081 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 146 m²/s²
0-3 km storm-relative helicity: 101 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 22, 7:00 PM CDT	Severe Thunderstorm Watch	SPC	Archer, Baylor, Clay, Collin, Cooke, Denton and 17 more	8 hr
May 22, 7:16 PM CDT	Mesoscale Discussion	SPC	Coke, Crockett, Fisher, Irion, Jones, Mitchell and 6 more	2 hr
May 22, 7:34 PM CDT	Severe Thunderstorm Watch	SPC	Bowie, Camp, Cass, Franklin, Morris, Red River and 1 more	8 hr
May 22, 9:26 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Collin, Cooke, Denton and 17 more	2 hr
May 22, 11:56 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Collin, Cooke, Denton and 13 more	2 hr
May 23, 2:18 PM CDT	Mesoscale Discussion	SPC	Armstrong, Borden, Briscoe, Carson, Castro, Childress and 30 more	117 min
May 23, 2:29 PM CDT	Severe Thunderstorm Watch	SPC	Borden, Brewster, Coke, Crane, Crockett, Dawson and 19 more	8 hr
May 23, 3:06 PM CDT	Severe Thunderstorm Watch	SPC	Armstrong, Briscoe, Carson, Childress, Collingsworth, Cottle and 27 more	7 hr
May 23, 5:25 PM CDT	Mesoscale Discussion	SPC	Armstrong, Borden, Brewster, Briscoe, Carson, Childress and 52 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2020 Every mesoscale discussion in 2020

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.