Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 653

May 11, 20049 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 11, 2004, 2:33 PM CDT for 9 counties in Texas. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued: May 11, 2004, 2:33 PM CDT (19:33 UTC)
Expired: May 11, 2004, 4:30 PM CDT
In force: 117 min
Issued by: the Storm Prediction Center

Counties Crane County, TX, Crockett County, TX, Glasscock County, TX, Irion County, TX, Midland County, TX, Pecos County, TX, Reagan County, TX, Terrell County, TX, Upton County, TX

The radar

The Midland/Odessa radar (KMAF), 151 km from the middle of the area, began a volume at 19:36 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

Midland Regional, TX (KMAF), launched 12:00Z, 7.6 hours before the alert went out and 152 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: 364 J/kg
Mixed-layer CIN: -177 J/kg
Mixed-layer LCL: 1047 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 10, 7:43 PM CDT	Mesoscale Discussion	SPC	Armstrong, Bailey, Borden, Briscoe, Carson, Castro and 38 more	2 hr
May 11, 9:37 AM CDT	Mesoscale Discussion	SPC	Aransas, Austin, Bee, Brazoria, Chambers, Colorado and 17 more	113 min
May 11, 10:05 AM CDT	Mesoscale Discussion	SPC	Bee, Duval, Goliad, Jim Wells, Live Oak, McMullen and 2 more	115 min
May 11, 10:55 AM CDT	Severe Thunderstorm Watch	SPC	Aransas, Atascosa, Austin, Bastrop, Bee, Brazoria and 33 more	5 hr
May 11, 2:00 PM CDT	Mesoscale Discussion	SPC	Dallam, Hansford, Hartley, Hutchinson, Moore, Oldham and 1 more	2 hr
May 11, 2:58 PM CDT	Mesoscale Discussion	SPC	Brazoria, Fort Bend, Harris, Matagorda	62 min
May 11, 3:00 PM CDT	Mesoscale Discussion	SPC	Brazoria, Fort Bend, Harris, Matagorda	60 min
May 11, 3:50 PM CDT	Severe Thunderstorm Watch	SPC	Chambers, Hardin, Harris, Jefferson, Liberty, Orange	3 hr
May 11, 4:05 PM CDT	Severe Thunderstorm Watch	SPC	Armstrong, Bailey, Briscoe, Carson, Castro, Childress and 38 more	6 hr
May 11, 6:03 PM CDT	Mesoscale Discussion	SPC	Chambers, Hardin, Jefferson, Liberty, Orange	57 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.