Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 1040

May 17, 20037 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 17, 2003, 1:17 AM CDT for 7 counties in Texas. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: May 17, 2003, 1:17 AM CDT (06:17 UTC)
Expired: May 17, 2003, 2:15 AM CDT
In force: 58 min
Issued by: the Storm Prediction Center

Counties Colorado County, TX, DeWitt County, TX, Fort Bend County, TX, Gonzales County, TX, Lavaca County, TX, Wharton County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 109 km from the middle of the area, began a volume at 06:20 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, 6.3 hours before the alert went out and 199 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: 3614 J/kg
Mixed-layer CIN: -201 J/kg
Mixed-layer LCL: 1334 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.7

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
May 16, 8:00 PM CDT	Severe Thunderstorm Watch	SPC	Angelina, Brazos, Burleson, Grimes, Houston, Jasper and 11 more	4 hr
May 16, 8:14 PM CDT	Mesoscale Discussion	SPC	Panola, Shelby	2 hr
May 16, 10:22 PM CDT	Mesoscale Discussion	SPC	Bastrop, Brazos, Burleson, Caldwell, Comal, Fayette and 14 more	113 min
May 16, 10:30 PM CDT	Severe Thunderstorm Watch	SPC	Austin, Bastrop, Brazos, Burleson, Caldwell, Colorado and 15 more	5 hr

Nearby

Mesoscale Discussions in Texas, 2003 Every mesoscale discussion in 2003

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.