Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 649

May 2, 20077 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 2, 2007, 3:08 PM CDT for 7 counties in Texas. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: May 2, 2007, 3:08 PM CDT (20:08 UTC)
Expired: May 2, 2007, 4:45 PM CDT
In force: 97 min
Issued by: the Storm Prediction Center

Counties Dimmit County, TX, Frio County, TX, Kinney County, TX, Maverick County, TX, Uvalde County, TX, Val Verde County, TX, Zavala County, TX

The radar

The Laughlin AFB radar (KDFX), 48 km from the middle of the area, began a volume at 20:10 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 watches that followed

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

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 8.1 hours before the alert went out and 26 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: 1853 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 603 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.1

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 1, 7:08 PM CDT	Mesoscale Discussion	SPC	Austin, Bandera, Bastrop, Bexar, Blanco, Brazos and 29 more	97 min
May 2, 7:19 AM CDT	Mesoscale Discussion	SPC	Andrews, Dawson, Ector, Gaines, Loving, Martin and 4 more	2 hr
May 2, 7:40 AM CDT	Mesoscale Discussion	SPC	Crane, Crockett, Ector, Loving, Midland, Pecos and 7 more	2 hr
May 2, 8:02 AM CDT	Severe Thunderstorm Watch	SPC	Andrews, Borden, Coke, Crane, Crockett, Dawson and 20 more	6 hr
May 2, 10:11 AM CDT	Mesoscale Discussion	SPC	Brewster, Crane, Crockett, Glasscock, Howard, Irion and 7 more	94 min
May 2, 12:07 PM CDT	Mesoscale Discussion	SPC	Culberson, Hudspeth, Jeff Davis, Loving, Reeves	113 min
May 2, 12:39 PM CDT	Mesoscale Discussion	SPC	Bandera, Brown, Callahan, Coke, Coleman, Comanche and 29 more	66 min
May 2, 12:50 PM CDT	Tornado Watch	SPC	Bandera, Brown, Burnet, Callahan, Coke, Coleman and 31 more	6 hr
May 2, 1:53 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Crane, Culberson, Dawson, Ector, Gaines and 14 more	7 hr
May 2, 2:38 PM CDT	Mesoscale Discussion	SPC	Bosque, Coryell, Dallas, Denton, Ellis, Erath and 16 more	2 hr
May 2, 3:43 PM CDT	Tornado Watch	SPC	Anderson, Bell, Bosque, Collin, Comanche, Cooke and 33 more	6 hr
May 2, 5:08 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bastrop, Bexar, Blanco, Burleson and 20 more	67 min
May 2, 5:53 PM CDT	Tornado Watch	SPC	Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 27 more	7 hr
May 2, 6:05 PM CDT	Mesoscale Discussion	SPC	Andrews, Brewster, Cochran, Coke, Crane, Culberson and 22 more	85 min
May 2, 6:52 PM CDT	Tornado Watch	SPC	Brewster, Crockett, Jeff Davis, Pecos, Presidio, Terrell	3 hr
May 2, 6:54 PM CDT	Mesoscale Discussion	SPC	Anderson, Bell, Bosque, Brazos, Burnet, Camp and 54 more	81 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.