Alert archive / Texas / Mesoscale Discussions in 2020

Mesoscale Discussion 649

May 20, 202024 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 20, 2020, 7:12 PM CDT for 24 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 20, 2020, 7:12 PM CDT (00:12 UTC)
Expired: May 20, 2020, 9:15 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 196

All 24 counties

Borden County, TX, Coke County, TX, Crockett County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Fisher County, TX, Garza County, TX, Glasscock County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kent County, TX, Lubbock County, TX, Lynn County, TX, Mitchell County, TX, Nolan County, TX, Reagan County, TX, Runnels County, TX, Scurry County, TX, Sterling County, TX, Stonewall County, TX, Taylor County, TX, Tom Green County, TX

The radar

The Midland/Odessa radar (KMAF), 82 km from the middle of the area, began a volume at 00:12 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 nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 0.2 hours before the alert went out and 83 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: 152 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 3871 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 22 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 20, 9:17 PM CDT	Mesoscale Discussion	SPC	Armstrong, Borden, Briscoe, Castro, Coke, Concho and 32 more	118 min
May 21, 5:13 PM CDT	Mesoscale Discussion	SPC	Borden, Callahan, Coke, Concho, Cottle, Crosby and 23 more	92 min
May 21, 5:47 PM CDT	Severe Thunderstorm Watch	SPC	Callahan, Childress, Coke, Coleman, Concho, Cottle and 21 more	8 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.