Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 1087

June 4, 200415 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 4, 2004, 5:08 PM CDT for 15 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 4, 2004, 5:08 PM CDT (22:08 UTC)
Expired: Jun 4, 2004, 7:15 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Angelina County, TX, Chambers County, TX, Hardin County, TX, Houston County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Madison County, TX, Montgomery County, TX, Orange County, TX, Polk County, TX, San Jacinto County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX

The radar

The Houston radar (KHGX), 105 km from the middle of the area, began a volume at 22:11 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 399Jun 4, 7:25 PM CDT

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.1 hours before the alert went out and 172 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: 3435 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 743 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 120 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 4, 2:13 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Childress, Collingsworth, Cottle, Erath and 22 more	2 hr
Jun 4, 2:29 PM CDT	Mesoscale Discussion	SPC	Dallam, Sherman	2 hr
Jun 4, 2:40 PM CDT	Severe Thunderstorm Watch	SPC	Archer, Baylor, Bosque, Callahan, Clay, Collin and 37 more	5 hr
Jun 4, 3:10 PM CDT	Severe Thunderstorm Watch	SPC	Dallam, Hansford, Hartley, Hutchinson, Moore, Sherman	6 hr
Jun 4, 3:26 PM CDT	Mesoscale Discussion	SPC	Culberson, El Paso, Hudspeth, Loving, Reeves	2 hr
Jun 4, 5:35 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Bell, Borden, Bosque, Brazos and 62 more	85 min
Jun 4, 6:04 PM CDT	Mesoscale Discussion	SPC	Hansford, Hutchinson, Moore, Ochiltree, Roberts, Sherman	116 min
Jun 4, 6:22 PM CDT	Mesoscale Discussion	SPC	Armstrong, Briscoe, Carson, Castro, Collingsworth, Deaf Smith and 10 more	83 min
Jun 4, 6:40 PM CDT	Severe Thunderstorm Watch	SPC	Armstrong, Briscoe, Carson, Castro, Donley, Gray and 11 more	4 hr

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.