Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 2283

September 30, 20046 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Sep 30, 2004, 5:56 PM CDT for 6 counties in Texas. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Sep 30, 2004, 5:56 PM CDT (22:56 UTC)
Expired: Sep 30, 2004, 7:30 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center

Counties Jeff Davis County, TX, Loving County, TX, Pecos County, TX, Reeves County, TX, Ward County, TX, Winkler County, TX

The radar

The Midland/Odessa radar (KMAF), 146 km from the middle of the area, began a volume at 22:59 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, 10.9 hours before the alert went out and 146 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: 428 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 732 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 235 m²/s²
0-3 km storm-relative helicity: 250 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.3

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
Sep 30, 1:23 PM CDT	Mesoscale Discussion	SPC	Bailey, Castro, Cochran, Culberson, Deaf Smith, Lamb and 4 more	2 hr
Sep 30, 1:55 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Armstrong, Bailey, Borden, Carson, Castro and 21 more	6 hr
Sep 30, 4:52 PM CDT	Mesoscale Discussion	SPC	Childress, Collingsworth, Cottle, Dickens, Donley, Fisher and 18 more	83 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.