Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 2307

October 7, 20044 counties in Oklahoma; 15 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Oct 7, 2004, 3:09 PM CDT for 4 counties in Oklahoma; 15 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Oct 7, 2004, 3:09 PM CDT (20:09 UTC)
Expired: Oct 7, 2004, 5:15 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Beckham County, OK, Greer County, OK, Harmon County, OK, Roger Mills County, OK, Briscoe County, TX, Carson County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Donley County, TX, Foard County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, Hutchinson County, TX, Motley County, TX, Roberts County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 96 km from the middle of the area, began a volume at 20:14 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

Fort Sill, OK (KFSI), launched 12:00Z, 8.2 hours before the alert went out and 212 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: 834 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 858 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 174 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.4

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
Oct 7, 7:14 AM CDT	Mesoscale Discussion	SPC	Caddo, Canadian, Jackson, Kiowa, Washita	3 hr
Oct 6, 7:23 PM CDT	Mesoscale Discussion	SPC	Culberson, Hudspeth, Jeff Davis	67 min
Oct 7, 2:03 AM CDT	Mesoscale Discussion	SPC	Andrews, Crane, Ector, Midland, Pecos, Upton and 2 more	57 min

Nearby

Mesoscale Discussions in Texas, 2004 Mesoscale Discussions in Oklahoma, 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.