Alert archive / Texas / Mesoscale Discussions in 2020

Mesoscale Discussion 668

May 22, 202015 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 22, 2020, 12:55 PM CDT for 15 counties in Texas. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: May 22, 2020, 12:55 PM CDT (17:55 UTC)
Expired: May 22, 2020, 2:30 PM CDT
In force: 95 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch likely
Chance of a watch: 80%

Counties Archer County, TX, Baylor County, TX, Foard County, TX, Haskell County, TX, Jack County, TX, Jones County, TX, Knox County, TX, Palo Pinto County, TX, Parker County, TX, Shackelford County, TX, Stephens County, TX, Stonewall County, TX, Throckmorton County, TX, Wise County, TX, Young County, TX

The radar

The Dyess AFB radar (KDYX), 86 km from the middle of the area, began a volume at 18:00 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 203May 22, 1:25 PM CDT

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 5.9 hours before the alert went out and 193 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: 580 J/kg
Mixed-layer CIN: -430 J/kg
Mixed-layer LCL: 1997 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 59 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 21, 8:00 PM CDT	Mesoscale Discussion	SPC	Coke, Concho, Fisher, Haskell, Irion, Jones and 9 more	90 min
May 21, 9:10 PM CDT	Mesoscale Discussion	SPC	Lipscomb	65 min
May 21, 9:49 PM CDT	Severe Thunderstorm Watch	SPC	Lipscomb, Ochiltree	8 hr
May 21, 10:25 PM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coleman, Concho, McCulloch, Runnels and 2 more	95 min
May 22, 1:27 PM CDT	Severe Thunderstorm Watch	SPC	Archer, Baylor, Clay, Foard, Hardeman, Haskell and 11 more	6 hr
May 22, 4:55 PM CDT	Mesoscale Discussion	SPC	Archer, Clay, Cooke, Fannin, Grayson, Lamar and 4 more	2 hr
May 22, 6:20 PM CDT	Mesoscale Discussion	SPC	Clay, Cooke, Montague, Wichita	115 min

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.