Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 652

May 16, 201327 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 16, 2013, 1:26 AM CDT for 27 counties in Texas. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: May 16, 2013, 1:26 AM CDT (06:26 UTC)
Expired: May 16, 2013, 3:00 AM CDT
In force: 94 min
Issued by: the Storm Prediction Center

All 27 counties

Anderson County, TX, Angelina County, TX, Bell County, TX, Brazos County, TX, Burleson County, TX, Burnet County, TX, Cherokee County, TX, Freestone County, TX, Grimes County, TX, Henderson County, TX, Houston County, TX, Lee County, TX, Leon County, TX, Llano County, TX, Madison County, TX, Milam County, TX, Montgomery County, TX, Nacogdoches County, TX, Polk County, TX, Robertson County, TX, Rusk County, TX, San Jacinto County, TX, Travis County, TX, Trinity County, TX, Walker County, TX, Washington County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 103 km from the middle of the area, began a volume at 06:27 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, 6.4 hours before the alert went out and 198 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: 1604 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 843 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 244 m²/s²
0-3 km storm-relative helicity: 436 m²/s²
Significant tornado parameter: 3.0
Supercell composite: 20.6

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 15, 7:18 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Callahan, Childress, Cottle, Dickens and 19 more	57 min
May 15, 7:40 PM CDT	Mesoscale Discussion	SPC	Bosque, Brown, Collin, Comanche, Cooke, Coryell and 13 more	65 min
May 15, 9:02 PM CDT	Mesoscale Discussion	SPC	Anderson, Bell, Bosque, Brazos, Brown, Burleson and 45 more	88 min
May 15, 11:28 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Bastrop, Blanco, Brazos, Burleson, Burnet and 23 more	5 hr
May 15, 11:39 PM CDT	Mesoscale Discussion	SPC	Bell, Bosque, Coryell, Dallas, Ellis, Hamilton and 11 more	96 min
May 16, 3:21 AM CDT	Mesoscale Discussion	SPC	Brazos, Burleson, Grimes, Lee, Madison, Milam and 1 more	24 min
May 16, 12:07 PM CDT	Mesoscale Discussion	SPC	Harrison, Marion	83 min
May 16, 3:48 PM CDT	Mesoscale Discussion	SPC	Armstrong, Bailey, Borden, Briscoe, Carson, Castro and 27 more	87 min

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.