Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 1297

June 27, 200710 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 27, 2007, 4:35 AM CDT for 10 counties in Texas. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: Jun 27, 2007, 4:35 AM CDT (09:35 UTC)
Expired: Jun 27, 2007, 6:00 AM CDT
In force: 85 min
Issued by: the Storm Prediction Center

Counties Bandera County, TX, Edwards County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, Medina County, TX, Menard County, TX, Real County, TX, Uvalde County, TX, Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 93 km from the middle of the area, began a volume at 09:36 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 00:00Z, 9.6 hours before the alert went out and 104 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: 3269 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 1111 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 192 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.2

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
Jun 26, 7:53 PM CDT	Mesoscale Discussion	SPC	Bell, Coryell, Falls, Freestone, Henderson, Kaufman and 10 more	3 hr
Jun 26, 8:32 PM CDT	Mesoscale Discussion	SPC	Andrews, Bailey, Borden, Briscoe, Cochran, Crane and 32 more	118 min
Jun 26, 8:57 PM CDT	Mesoscale Discussion	SPC	Armstrong, Dallam, Deaf Smith, Hartley, Oldham, Sherman	2 hr
Jun 26, 11:08 PM CDT	Mesoscale Discussion	SPC	Andrews, Borden, Brewster, Crane, Crockett, Culberson and 21 more	97 min
Jun 26, 11:33 PM CDT	Severe Thunderstorm Watch	SPC	Brewster, Coke, Crockett, Edwards, Fisher, Irion and 11 more	5 hr
Jun 27, 2:03 AM CDT	Mesoscale Discussion	SPC	Callahan, Coleman, Concho, Gillespie, Jones, Kimble and 8 more	87 min
Jun 27, 2:21 AM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bexar, Brewster, Crockett, Dimmit and 18 more	84 min
Jun 27, 2:49 PM CDT	Mesoscale Discussion	SPC	Anderson, Bell, Bosque, Collin, Cooke, Coryell and 33 more	116 min

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.