Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 600

May 10, 2015Sebastian County, Arkansas; 6 counties in Oklahoma; 11 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 10, 2015, 8:06 PM CDT for Sebastian County, Arkansas; 6 counties in Oklahoma; 11 counties in Texas. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: May 10, 2015, 8:06 PM CDT (01:06 UTC)
Expired: May 10, 2015, 9:00 PM CDT
In force: 54 min
Issued by: the Storm Prediction Center

Counties Sebastian County, AR, Atoka County, OK, Bryan County, OK, Choctaw County, OK, Latimer County, OK, LeFlore County, OK, Pushmataha County, OK, Anderson County, TX, Fannin County, TX, Freestone County, TX, Henderson County, TX, Hunt County, TX, Kaufman County, TX, Limestone County, TX, McLennan County, TX, Navarro County, TX, Rockwall County, TX, Van Zandt County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 163 km from the middle of the area, began a volume at 01:10 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, 1.1 hours before the alert went out and 149 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: 1254 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 1336 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 229 m²/s²
0-3 km storm-relative helicity: 265 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 6.2

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 10, 7:08 PM CDT	Mesoscale Discussion	SPC	Clark, Columbia, Dallas, Faulkner, Garland, Grant and 18 more	97 min
May 10, 7:34 PM CDT	Tornado Watch	SPC	Clark, Dallas, Garland, Grant, Hempstead, Hot Spring and 13 more	4 hr
May 10, 9:57 PM CDT	Mesoscale Discussion	SPC	Clark, Columbia, Garland, Hempstead, Hot Spring, Howard and 12 more	93 min
May 10, 11:31 PM CDT	Tornado Watch	SPC	Arkansas, Bradley, Calhoun, Clark, Cleburne, Cleveland and 33 more	5 hr
May 11, 2:31 AM CDT	Mesoscale Discussion	SPC	Edwards, Kerr, Kimble, Real, Sutton, Val Verde	89 min
May 11, 2:55 AM CDT	Mesoscale Discussion	SPC	Angelina, Brazos, Burleson, Houston, Leon, Madison and 7 more	95 min
May 11, 4:19 AM CDT	Severe Thunderstorm Watch	SPC	Bandera, Bastrop, Bexar, Blanco, Burnet, Caldwell and 18 more	7 hr
May 11, 7:04 AM CDT	Mesoscale Discussion	SPC	Austin, Bandera, Bastrop, Bexar, Blanco, Burleson and 34 more	56 min
May 11, 2:16 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bee, Bexar, Colorado, DeWitt, Dimmit and 18 more	119 min

Nearby

Mesoscale Discussions in Texas, 2015 Mesoscale Discussions in Oklahoma, 2015 Mesoscale Discussions in Arkansas, 2015 Every mesoscale discussion in 2015

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.