Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 742

May 7, 200712 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 7, 2007, 1:14 PM CDT for 12 counties in Texas. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: May 7, 2007, 1:14 PM CDT (18:14 UTC)
Expired: May 7, 2007, 2:15 PM CDT
In force: 61 min
Issued by: the Storm Prediction Center

Counties Crockett County, TX, Edwards County, TX, Irion County, TX, Kimble County, TX, Kinney County, TX, Menard County, TX, Real County, TX, Schleicher County, TX, Sutton County, TX, Terrell County, TX, Tom Green County, TX, Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 111 km from the middle of the area, began a volume at 18:17 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 12:00Z, 6.2 hours before the alert went out and 91 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: 3147 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 532 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 125 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 7.5

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 6, 7:04 PM CDT	Mesoscale Discussion	SPC	Crockett, Irion, Reagan, Terrell, Upton	56 min
May 6, 7:55 PM CDT	Tornado Watch	SPC	Coke, Coleman, Concho, Crockett, Glasscock, Howard and 13 more	6 hr
May 6, 10:20 PM CDT	Mesoscale Discussion	SPC	Concho, Irion, Reagan, Tom Green	55 min
May 6, 11:04 PM CDT	Mesoscale Discussion	SPC	Archer, Clay, Cooke, Fannin, Grayson, Lamar and 3 more	56 min
May 6, 11:54 PM CDT	Tornado Watch	SPC	Archer, Baylor, Clay, Wichita, Wilbarger	5 hr
May 7, 4:30 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Wichita, Wilbarger	30 min
May 7, 10:29 AM CDT	Mesoscale Discussion	SPC	Collin, Cooke, Denton, Fannin, Grayson, Jack and 4 more	2 hr
May 7, 10:51 AM CDT	Tornado Watch	SPC	Collin, Cooke, Denton, Fannin, Grayson, Lamar and 2 more	5 hr
May 7, 1:59 PM CDT	Mesoscale Discussion	SPC	Crockett, Edwards, Irion, Kimble, Kinney, Menard and 6 more	61 min
May 7, 5:38 PM CDT	Mesoscale Discussion	SPC	Dimmit, Kinney, Maverick, Uvalde, Zavala	67 min
May 7, 5:59 PM CDT	Tornado Watch	SPC	Bandera, Dimmit, Edwards, Frio, Kerr, Kinney and 8 more	8 hr
May 7, 6:19 PM CDT	Mesoscale Discussion	SPC	Brewster, Crane, Ector, Jeff Davis, Midland, Pecos and 7 more	86 min
May 7, 6:42 PM CDT	Tornado Watch	SPC	Brewster, Jeff Davis, Pecos, Presidio, Reeves, Terrell	5 hr

Nearby

Mesoscale Discussions in Texas, 2007 Every mesoscale discussion in 2007

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.