Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 824

May 28, 201536 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 28, 2015, 2:04 PM CDT for 36 counties in Texas. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: May 28, 2015, 2:04 PM CDT (19:04 UTC)
Expired: May 28, 2015, 3:00 PM CDT
In force: 56 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 36 counties

Atascosa County, TX, Austin County, TX, Bastrop County, TX, Bee County, TX, Bell County, TX, Bexar County, TX, Bosque County, TX, Brazos County, TX, Burleson County, TX, Burnet County, TX, Caldwell County, TX, Colorado County, TX, Comal County, TX, Coryell County, TX, DeWitt County, TX, Falls County, TX, Fayette County, TX, Goliad County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Hill County, TX, Karnes County, TX, Lavaca County, TX, Lee County, TX, Limestone County, TX, Live Oak County, TX, McLennan County, TX, McMullen County, TX, Milam County, TX, Robertson County, TX, Travis County, TX, Waller County, TX, Washington County, TX, Williamson County, TX, Wilson County, TX

The radar

The Ft Hood radar (KGRK), 44 km from the middle of the area, began a volume at 19:05 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 236May 28, 3:25 PM CDT

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 7.1 hours before the alert went out and 289 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: 3279 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 622 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 24 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 28, 2:50 AM CDT	Mesoscale Discussion	SPC	Archer, Clay, Cooke, Foard, Grayson, Montague and 2 more	2 hr
May 28, 11:45 AM CDT	Mesoscale Discussion	SPC	Andrews, Borden, Cochran, Cottle, Crosby, Dawson and 28 more	90 min
May 28, 12:44 PM CDT	Tornado Watch	SPC	Andrews, Bailey, Baylor, Borden, Brewster, Callahan and 58 more	7 hr
May 28, 2:18 PM CDT	Severe Thunderstorm Watch	SPC	Dallam, Hansford, Hartley, Lipscomb, Ochiltree, Sherman	7 hr
May 28, 2:56 PM CDT	Mesoscale Discussion	SPC	Archer, Bosque, Brown, Callahan, Clay, Coleman and 25 more	94 min
May 28, 3:26 PM CDT	Severe Thunderstorm Watch	SPC	Archer, Bell, Bosque, Brown, Clay, Coleman and 44 more	8 hr
May 28, 3:42 PM CDT	Mesoscale Discussion	SPC	Andrews, Bailey, Baylor, Borden, Brewster, Cochran and 55 more	63 min
May 28, 5:33 PM CDT	Mesoscale Discussion	SPC	Dallam, Hansford, Lipscomb, Ochiltree, Sherman	87 min
May 28, 6:57 PM CDT	Mesoscale Discussion	SPC	Bandera, Bexar, Blanco, Coke, Comal, Concho and 28 more	2 hr

Nearby

Mesoscale Discussions in Texas, 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.