Alert archive / Texas / Mesoscale Discussions in 2020

Mesoscale Discussion 612

May 16, 202017 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 16, 2020, 1:31 AM CDT for 17 counties in Texas. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: May 16, 2020, 1:31 AM CDT (06:31 UTC)
Expired: May 16, 2020, 3:00 AM CDT
In force: 89 min
Issued by: the Storm Prediction Center

Counties Aransas County, TX, Brooks County, TX, Calhoun County, TX, Duval County, TX, Goliad County, TX, Hidalgo County, TX, Jim Hogg County, TX, Jim Wells County, TX, Kenedy County, TX, Kleberg County, TX, Nueces County, TX, Refugio County, TX, San Patricio County, TX, Starr County, TX, Victoria County, TX, Willacy County, TX, Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 69 km from the middle of the area, began a volume at 06:35 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

Corpus Christi, TX (KCRP), launched 00:00Z, 6.5 hours before the alert went out and 83 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: 3374 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 744 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.5

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 15, 8:18 PM CDT	Mesoscale Discussion	SPC	Carson, Dallam, Gray, Hansford, Hartley, Hemphill and 6 more	2 hr
May 15, 8:56 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bastrop, Bee, Bell, Bexar and 71 more	2 hr
May 15, 9:14 PM CDT	Severe Thunderstorm Watch	SPC	Aransas, Atascosa, Bandera, Bastrop, Bee, Bell and 66 more	7 hr
May 15, 11:44 PM CDT	Mesoscale Discussion	SPC	Aransas, Atascosa, Austin, Bastrop, Bee, Bell and 48 more	2 hr
May 16, 12:54 AM CDT	Severe Thunderstorm Watch	SPC	Austin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 6 more	4 hr
May 16, 1:16 PM CDT	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Franklin, Harrison, Marion and 4 more	2 hr
May 16, 3:27 PM CDT	Tornado Watch	SPC	Bowie, Camp, Cass, Franklin, Harrison, Marion and 5 more	6 hr
May 16, 5:31 PM CDT	Mesoscale Discussion	SPC	Bowie	59 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.