Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 616

May 9, 201314 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 9, 2013, 10:29 PM CDT for 14 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 9, 2013, 10:29 PM CDT (03:29 UTC)
Expired: May 10, 2013, 12:30 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Atascosa County, TX, Bandera County, TX, Bexar County, TX, Comal County, TX, Dimmit County, TX, Frio County, TX, Gonzales County, TX, Guadalupe County, TX, Karnes County, TX, Medina County, TX, Uvalde County, TX, Webb County, TX, Wilson County, TX, Zavala County, TX

The radar

The Laughlin AFB radar (KDFX), 131 km from the middle of the area, began a volume at 03:31 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, 3.5 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: 1373 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 2244 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 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, 1:33 PM CDT	Mesoscale Discussion	SPC	Brewster, Edwards, Kinney, Maverick, Real, Terrell and 3 more	57 min
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.