Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 1249

June 22, 200720 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2007, 1:35 PM CDT for 20 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jun 22, 2007, 1:35 PM CDT (18:35 UTC)
Expired: Jun 22, 2007, 4:30 PM CDT
In force: 3 hr
Issued by: the Storm Prediction Center

Counties Atascosa County, TX, Bee County, TX, Brooks County, TX, DeWitt County, TX, Duval County, TX, Goliad County, TX, Jim Hogg County, TX, Jim Wells County, TX, Karnes County, TX, Kleberg County, TX, La Salle County, TX, Live Oak County, TX, McMullen County, TX, Nueces County, TX, Refugio County, TX, San Patricio County, TX, Starr County, TX, Webb County, TX, Wilson County, TX, Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 107 km from the middle of the area, began a volume at 18:37 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

Corpus Christi, TX (KCRP), launched 12:00Z, 6.6 hours before the alert went out and 125 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: 1630 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 803 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 68 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
Jun 22, 4:11 PM CDT	Mesoscale Discussion	SPC	Armstrong, Briscoe, Carson, Donley, Floyd, Gray and 8 more	3 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.