Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 699

May 13, 200433 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 13, 2004, 11:17 PM CDT for 33 counties in Texas. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: May 13, 2004, 11:17 PM CDT (04:17 UTC)
Expired: May 14, 2004, 12:15 AM CDT
In force: 58 min
Issued by: the Storm Prediction Center

All 33 counties

Aransas County, TX, Bandera County, TX, Bee County, TX, Brooks County, TX, Cameron County, TX, Dimmit County, TX, Duval County, TX, Edwards County, TX, Frio County, TX, Hidalgo County, TX, Jim Hogg County, TX, Jim Wells County, TX, Kenedy County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, Kleberg County, TX, La Salle County, TX, Live Oak County, TX, Mason County, TX, Maverick County, TX, McMullen County, TX, Medina County, TX, Menard County, TX, Nueces County, TX, Real County, TX, San Patricio County, TX, Schleicher County, TX, Starr County, TX, Sutton County, TX, Uvalde County, TX, Willacy County, TX, Zavala County, TX

The radar

The Corpus Christi radar (KCRP), 140 km from the middle of the area, began a volume at 04:18 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.

Severe Thunderstorm Watch 205May 13, 11:45 PM CDT

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 4.3 hours before the alert went out and 158 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: 3220 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 573 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 6.1

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 13, 7:00 PM CDT	Severe Thunderstorm Watch	SPC	Aransas, Bee, Dimmit, Duval, Frio, Jim Wells and 9 more	5 hr
May 13, 9:39 PM CDT	Mesoscale Discussion	SPC	Bandera, Edwards, Gillespie, Kerr, Kimble, Mason and 5 more	96 min
May 13, 9:57 PM CDT	Mesoscale Discussion	SPC	Aransas, Bee, Dimmit, Duval, Frio, Jim Wells and 9 more	93 min
May 13, 10:13 PM CDT	Mesoscale Discussion	SPC	Brooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 2 more	92 min
May 13, 11:45 PM CDT	Severe Thunderstorm Watch	SPC	Brooks, Cameron, Hidalgo, Kenedy, Kleberg, Starr and 1 more	4 hr
May 14, 2:14 AM CDT	Mesoscale Discussion	SPC	Brooks, Cameron, Hidalgo, Kenedy, Kleberg, Starr and 1 more	91 min

Nearby

Mesoscale Discussions in Texas, 2004 Every mesoscale discussion in 2004

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.