Alert archive / Texas / Mesoscale Discussions in 2020

Mesoscale Discussion 942

June 19, 20204 counties in Oklahoma; 21 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 19, 2020, 9:06 PM CDT for 4 counties in Oklahoma; 21 counties in Texas. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Jun 19, 2020, 9:06 PM CDT (02:06 UTC)
Expired: Jun 19, 2020, 11:00 PM CDT
In force: 114 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 285

All 25 counties

Greer County, OK, Harmon County, OK, Jackson County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Callahan County, TX, Childress County, TX, Clay County, TX, Fisher County, TX, Foard County, TX, Hardeman County, TX, Haskell County, TX, Jones County, TX, King County, TX, Knox County, TX, Mitchell County, TX, Nolan County, TX, Shackelford County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Young County, TX

The radar

The Altus AFB radar (KFDR), 93 km from the middle of the area, began a volume at 02:10 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 2.1 hours before the alert went out and 226 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: 365 J/kg
Mixed-layer CIN: -262 J/kg
Mixed-layer LCL: 1768 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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 20, 3:48 PM CDT	Mesoscale Discussion	SPC	Beaver, Ellis, Harper, Woods, Woodward	117 min
Jun 20, 5:40 PM CDT	Mesoscale Discussion	SPC	Andrews, Borden, Crane, Dawson, Ector, Glasscock and 6 more	65 min
Jun 20, 6:02 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Coke, Crane, Ector, Glasscock, Howard and 10 more	4 hr

Nearby

Mesoscale Discussions in Texas, 2020 Mesoscale Discussions in Oklahoma, 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.