Alert archive / Texas / Mesoscale Discussions in 2022

Mesoscale Discussion 618

May 1, 2022Dimmit County, Maverick County, Zavala County, Texas

The Storm Prediction Center issued this mesoscale discussion at May 1, 2022, 11:07 PM CDT for Dimmit County, Maverick County, Zavala County, Texas. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: May 1, 2022, 11:07 PM CDT (04:07 UTC)
Expired: May 2, 2022, 1:00 AM CDT
In force: 113 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch possible
Chance of a watch: 40%

Counties Dimmit County, TX, Maverick County, TX, Zavala County, TX

The radar

The Laughlin AFB radar (KDFX), 75 km from the middle of the area, began a volume at 04:08 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

Del Rio, TX (KDRT), launched 00:00Z, 4.1 hours before the alert went out and 108 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: 1808 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 1463 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.4

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 1, 7:57 PM CDT	Mesoscale Discussion	SPC	Callahan, Coke, Coleman, Eastland, Fisher, Haskell and 10 more	93 min
May 1, 8:22 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Callahan, Coleman, Comanche, Concho, Coryell and 23 more	6 hr
May 1, 10:30 PM CDT	Mesoscale Discussion	SPC	Armstrong, Carson, Collingsworth, Dallam, Donley, Gray and 10 more	2 hr
May 1, 11:44 PM CDT	Mesoscale Discussion	SPC	Bell, Bosque, Brown, Burnet, Callahan, Comanche and 22 more	2 hr
May 2, 1:20 PM CDT	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Collin, Delta, Fannin and 11 more	2 hr
May 2, 5:08 PM CDT	Mesoscale Discussion	SPC	Delta, Fannin, Lamar, Red River	67 min

Nearby

Mesoscale Discussions in Texas, 2022 Every mesoscale discussion in 2022

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.