Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 2372

September 11, 20034 counties in Oklahoma; 7 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Sep 11, 2003, 1:54 AM CDT for 4 counties in Oklahoma; 7 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Sep 11, 2003, 1:54 AM CDT (06:54 UTC)
Expired: Sep 11, 2003, 5:00 AM CDT
In force: 3 hr
Issued by: the Storm Prediction Center

Counties Custer County, OK, Jackson County, OK, Kiowa County, OK, Washita County, OK, Childress County, TX, Cottle County, TX, Floyd County, TX, Foard County, TX, Hall County, TX, Hardeman County, TX, Motley County, TX

The radar

The Altus AFB radar (KFDR), 72 km from the middle of the area, began a volume at 06:54 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 6.9 hours before the alert went out and 199 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: 959 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 2150 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 173 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

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
Sep 10, 8:10 PM CDT	Severe Thunderstorm Watch	SPC	Beaver, Beckham, Ellis, Harper, Roger Mills, Woodward	5 hr
Sep 10, 11:40 PM CDT	Mesoscale Discussion	SPC	Beaver, Beckham, Ellis, Greer, Harmon, Harper and 2 more	2 hr
Sep 11, 12:53 PM CDT	Mesoscale Discussion	SPC	Bosque, Brown, Callahan, Coleman, Comanche, Dallas and 20 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2003 Mesoscale Discussions in Oklahoma, 2003 Every mesoscale discussion in 2003

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.