Alert archive / Texas / Mesoscale Discussions in 2018

Mesoscale Discussion 323

May 2, 201833 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 2, 2018, 7:17 PM CDT for 33 counties in Texas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: May 2, 2018, 7:17 PM CDT (00:17 UTC)
Expired: May 2, 2018, 8:45 PM CDT
In force: 88 min
Issued by: the Storm Prediction Center

All 33 counties

Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crockett County, TX, Eastland County, TX, Edwards County, TX, Fisher County, TX, Glasscock County, TX, Haskell County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kent County, TX, Kimble County, TX, Menard County, TX, Mitchell County, TX, Nolan County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Scurry County, TX, Shackelford County, TX, Stephens County, TX, Sterling County, TX, Stonewall County, TX, Sutton County, TX, Taylor County, TX, Terrell County, TX, Throckmorton County, TX, Tom Green County, TX, Val Verde County, TX, Young County, TX

The radar

The San Angelo radar (KSJT), 29 km from the middle of the area, began a volume at 00:18 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, 0.3 hours before the alert went out and 186 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3649 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 227 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 2, 10:27 PM CDT	Mesoscale Discussion	SPC	Borden, Callahan, Coke, Coleman, Concho, Crockett and 28 more	93 min
May 3, 4:06 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Cooke, Denton, Foard and 13 more	114 min
May 3, 5:18 AM CDT	Severe Thunderstorm Watch	SPC	Archer, Baylor, Clay, Cooke, Grayson, Montague and 2 more	6 hr
May 3, 5:55 AM CDT	Mesoscale Discussion	SPC	Bosque, Brown, Callahan, Coleman, Comanche, Concho and 28 more	2 hr
May 3, 7:03 AM CDT	Severe Thunderstorm Watch	SPC	Bell, Bosque, Brown, Burnet, Coleman, Collin and 38 more	7 hr
May 3, 9:55 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Bell, Bosque, Brown, Burnet and 39 more	65 min
May 3, 12:35 PM CDT	Mesoscale Discussion	SPC	Bell, Bosque, Bowie, Camp, Cass, Coryell and 22 more	85 min
May 3, 5:42 PM CDT	Mesoscale Discussion	SPC	Bandera, Bexar, Dimmit, Edwards, Frio, Gillespie and 8 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2018 Every mesoscale discussion in 2018

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.