Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 623

May 10, 20139 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 10, 2013, 1:33 PM CDT for 9 counties in Texas. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: May 10, 2013, 1:33 PM CDT (18:33 UTC)
Expired: May 10, 2013, 2:30 PM CDT
In force: 57 min
Issued by: the Storm Prediction Center
Chance of a watch: 95%

Counties Brewster County, TX, Edwards County, TX, Kinney County, TX, Maverick County, TX, Real County, TX, Terrell County, TX, Uvalde County, TX, Val Verde County, TX, Zavala County, TX

The radar

The Laughlin AFB radar (KDFX), 166 km from the middle of the area, began a volume at 18:35 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 156May 10, 2:35 PM CDT

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 6.6 hours before the alert went out and 111 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: 1511 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 833 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 227 m²/s²
0-3 km storm-relative helicity: 323 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 17.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 9, 7:48 PM CDT	Severe Thunderstorm Watch	SPC	Atascosa, Bandera, Bastrop, Bexar, Blanco, Caldwell and 22 more	6 hr
May 9, 9:41 PM CDT	Severe Thunderstorm Watch	SPC	Jasper, Newton, Sabine	8 hr
May 9, 10:29 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bexar, Comal, Dimmit, Frio and 8 more	2 hr
May 10, 1:29 AM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bexar, Dimmit, Edwards, Frio and 10 more	31 min
May 10, 8:43 AM CDT	Mesoscale Discussion	SPC	Brazoria, Colorado, DeWitt, Fort Bend, Gonzales, Jackson and 6 more	32 min
May 10, 9:02 AM CDT	Severe Thunderstorm Watch	SPC	Austin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 12 more	5 hr
May 10, 2:37 PM CDT	Severe Thunderstorm Watch	SPC	Atascosa, Bandera, Bastrop, Bexar, Blanco, Brown and 41 more	7 hr
May 10, 5:04 PM CDT	Mesoscale Discussion	SPC	Bandera, Bastrop, Bell, Bexar, Blanco, Brazos and 43 more	116 min
May 10, 6:53 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bastrop, Bee, Bexar, Blanco and 31 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2013 Every mesoscale discussion in 2013

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.