Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 548

May 8, 201514 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 8, 2015, 3:26 PM CDT for 14 counties in Texas. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: May 8, 2015, 3:26 PM CDT (20:26 UTC)
Expired: May 8, 2015, 5:00 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

Counties Coke County, TX, Crockett County, TX, Edwards County, TX, Glasscock County, TX, Irion County, TX, Kinney County, TX, Reagan County, TX, Schleicher County, TX, Sterling County, TX, Sutton County, TX, Terrell County, TX, Tom Green County, TX, Upton County, TX, Val Verde County, TX

The radar

The San Angelo radar (KSJT), 125 km from the middle of the area, began a volume at 20:27 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 watches that followed

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

Tornado Watch 145May 8, 3:50 PM CDT

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 8.4 hours before the alert went out and 192 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: 2610 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 678 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 282 m²/s²
0-3 km storm-relative helicity: 327 m²/s²
Significant tornado parameter: 5.2
Supercell composite: 17.7

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 7, 8:49 PM CDT	Mesoscale Discussion	SPC	Bosque, Collin, Comanche, Dallas, Delta, Denton and 19 more	86 min
May 7, 11:05 PM CDT	Mesoscale Discussion	SPC	Bosque, Collin, Comanche, Dallas, Delta, Ellis and 17 more	85 min
May 8, 8:57 AM CDT	Mesoscale Discussion	SPC	Bailey, Briscoe, Castro, Childress, Cottle, Crosby and 18 more	93 min
May 8, 9:31 AM CDT	Tornado Watch	SPC	Andrews, Armstrong, Bailey, Borden, Briscoe, Callahan and 40 more	7 hr
May 8, 12:22 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Childress, Clay, Foard, Hardeman and 5 more	83 min
May 8, 12:51 PM CDT	Tornado Watch	SPC	Archer, Baylor, Childress, Clay, Collingsworth, Cooke and 14 more	8 hr
May 8, 2:12 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Childress, Clay, Cooke, Foard and 8 more	93 min
May 8, 2:48 PM CDT	Mesoscale Discussion	SPC	Bailey, Borden, Cottle, Crosby, Dawson, Dickens and 18 more	87 min
May 8, 3:45 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Foard, Hardeman, Knox and 3 more	90 min
May 8, 3:50 PM CDT	Tornado Watch	SPC	Andrews, Borden, Callahan, Coke, Crane, Crockett and 27 more	8 hr
May 8, 5:15 PM CDT	Mesoscale Discussion	SPC	Bell, Brazos, Burleson, Falls, Freestone, Grimes and 8 more	90 min
May 8, 6:13 PM CDT	Mesoscale Discussion	SPC	Baylor, Borden, Callahan, Coke, Concho, Crane and 31 more	2 hr
May 8, 6:50 PM CDT	Mesoscale Discussion	SPC	Archer, Clay, Collin, Cooke, Dallas, Delta and 15 more	85 min

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.