Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 612

April 29, 20078 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 29, 2007, 5:11 AM CDT for 8 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 29, 2007, 5:11 AM CDT (10:11 UTC)
Expired: Apr 29, 2007, 7:15 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Brewster County, TX, Crockett County, TX, Jeff Davis County, TX, Pecos County, TX, Presidio County, TX, Terrell County, TX, Upton County, TX, Val Verde County, TX

The radar

The Midland/Odessa radar (KMAF), 222 km from the middle of the area, began a volume at 10:14 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

Midland Regional, TX (KMAF), launched 00:00Z, 10.2 hours before the alert went out and 223 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2574 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -23 m²/s²
0-3 km storm-relative helicity: 37 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
Apr 29, 12:59 AM CDT	Mesoscale Discussion	SPC	Dimmit, Kinney, Maverick, Zavala	2 hr
Apr 29, 7:43 AM CDT	Mesoscale Discussion	SPC	Andrews, Brewster, Crane, Crockett, Ector, Glasscock and 16 more	3 hr
Apr 29, 12:03 PM CDT	Mesoscale Discussion	SPC	Brewster, Crane, Crockett, Culberson, Hudspeth, Jeff Davis and 6 more	57 min
Apr 29, 12:34 PM CDT	Tornado Watch	SPC	Brewster, Crane, Crockett, Culberson, Jeff Davis, Loving and 11 more	7 hr
Apr 29, 3:12 PM CDT	Mesoscale Discussion	SPC	Brewster, Crane, Crockett, Culberson, Jeff Davis, Loving and 11 more	63 min
Apr 29, 3:50 PM CDT	Mesoscale Discussion	SPC	Andrews, Borden, Coke, Crosby, Dawson, Dickens and 21 more	55 min
Apr 29, 4:56 PM CDT	Severe Thunderstorm Watch	SPC	Baylor, Callahan, Coke, Coleman, Concho, Ector and 24 more	6 hr
Apr 29, 6:34 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bexar, Blanco, Comal, Dimmit and 20 more	86 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.