Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 997

June 3, 200729 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2007, 11:34 PM CDT for 29 counties in Texas. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Jun 3, 2007, 11:34 PM CDT (04:34 UTC)
Expired: Jun 4, 2007, 1:30 AM CDT
In force: 116 min
Issued by: the Storm Prediction Center

All 29 counties

Atascosa County, TX, Austin County, TX, Bandera County, TX, Bexar County, TX, Brazoria County, TX, Chambers County, TX, Colorado County, TX, DeWitt County, TX, Dimmit County, TX, Fayette County, TX, Fort Bend County, TX, Frio County, TX, Galveston County, TX, Goliad County, TX, Guadalupe County, TX, Harris County, TX, Jackson County, TX, Karnes County, TX, Lavaca County, TX, Liberty County, TX, Matagorda County, TX, Medina County, TX, Montgomery County, TX, Uvalde County, TX, Victoria County, TX, Waller County, TX, Wharton County, TX, Wilson County, TX, Zavala County, TX

The radar

The Austin/San Antonio radar (KEWX), 74 km from the middle of the area, began a volume at 04:36 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

Corpus Christi, TX (KCRP), launched 00:00Z, 4.6 hours before the alert went out and 162 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: 1327 J/kg
Mixed-layer CIN: -218 J/kg
Mixed-layer LCL: 1121 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.7

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 3, 7:10 PM CDT	Severe Thunderstorm Watch	SPC	Bailey, Castro, Cochran, Hale, Hockley, Lamb and 6 more	4 hr
Jun 3, 7:12 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bee, Bexar, Dimmit, Edwards and 13 more	63 min
Jun 3, 7:32 PM CDT	Severe Thunderstorm Watch	SPC	Atascosa, Bandera, Bexar, DeWitt, Dimmit, Edwards and 10 more	4 hr
Jun 3, 9:22 PM CDT	Mesoscale Discussion	SPC	Austin, Bastrop, Blanco, Brazoria, Brazos, Burleson and 26 more	53 min
Jun 3, 11:13 PM CDT	Mesoscale Discussion	SPC	Briscoe, Childress, Cottle, Dickens, Foard, Hall and 4 more	2 hr
Jun 4, 11:43 AM CDT	Mesoscale Discussion	SPC	Hardin, Houston, Jasper, Leon, Liberty, Madison and 7 more	92 min
Jun 4, 2:24 PM CDT	Severe Thunderstorm Watch	SPC	Austin, Bastrop, Bell, Blanco, Brazos, Burleson and 35 more	6 hr
Jun 4, 5:30 PM CDT	Mesoscale Discussion	SPC	Austin, Bastrop, Bell, Blanco, Brazos, Burleson and 35 more	90 min
Jun 4, 6:57 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bee, Bexar, DeWitt, Dimmit, Frio and 15 more	93 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.