Alert archive / Texas / Mesoscale Discussions in 2023

Mesoscale Discussion 697

May 6, 20237 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 6, 2023, 11:13 PM CDT for 7 counties in Texas. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: May 6, 2023, 11:13 PM CDT (04:13 UTC)
Expired: May 7, 2023, 12:45 AM CDT
In force: 92 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 193

Counties Dallas County, TX, Ellis County, TX, Hill County, TX, Johnson County, TX, Kaufman County, TX, Rockwall County, TX, Tarrant County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 36 km from the middle of the area, began a volume at 04:15 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

Fort Worth, TX (KFWD), launched 00:00Z, 4.2 hours before the alert went out and 61 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: 3190 J/kg
Mixed-layer CIN: -131 J/kg
Mixed-layer LCL: 968 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 6, 8:31 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Clay, Coleman and 19 more	119 min
May 6, 9:39 PM CDT	Severe Thunderstorm Watch	SPC	Bosque, Collin, Comanche, Dallas, Delta, Denton and 23 more	5 hr
May 7, 1:33 PM CDT	Mesoscale Discussion	SPC	Harrison, Panola, Sabine, San Augustine, Shelby	87 min
May 7, 1:55 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Borden, Callahan, Clay, Coke and 28 more	95 min
May 7, 2:55 PM CDT	Severe Thunderstorm Watch	SPC	Archer, Baylor, Borden, Brown, Callahan, Coke and 34 more	6 hr
May 7, 4:52 PM CDT	Mesoscale Discussion	SPC	Dimmit, Edwards, Kinney, Maverick, Uvalde, Val Verde and 3 more	2 hr
May 7, 5:23 PM CDT	Mesoscale Discussion	SPC	Baylor, Fisher, Foard, Haskell, Jones, King and 6 more	97 min

Nearby

Mesoscale Discussions in Texas, 2023 Every mesoscale discussion in 2023

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.