Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 468

April 15, 20034 counties in Oklahoma; 26 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 15, 2003, 7:11 PM CDT for 4 counties in Oklahoma; 26 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 15, 2003, 7:11 PM CDT (00:11 UTC)
Expired: Apr 15, 2003, 9:15 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 30 counties

Comanche County, OK, Harmon County, OK, Jackson County, OK, Tillman County, OK, Baylor County, TX, Borden County, TX, Childress County, TX, Cottle County, TX, Dickens County, TX, Fisher County, TX, Foard County, TX, Garza County, TX, Glasscock County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Howard County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Mitchell County, TX, Motley County, TX, Nolan County, TX, Reagan County, TX, Scurry County, TX, Sterling County, TX, Stonewall County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Lubbock radar (KLBB), 136 km from the middle of the area, began a volume at 00:11 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 nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 0.2 hours before the alert went out and 233 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: 1093 J/kg
Mixed-layer CIN: -179 J/kg
Mixed-layer LCL: 1733 m above ground
0-6 km bulk shear: 96 kt
0-1 km storm-relative helicity: 486 m²/s²
0-3 km storm-relative helicity: 650 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 7.9

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
Apr 15, 8:35 PM CDT	Mesoscale Discussion	SPC	Carter, Cleveland, Creek, Garvin, Grady, Jefferson and 16 more	115 min
Apr 15, 9:00 PM CDT	Tornado Watch	SPC	Carter, Cleveland, Coal, Creek, Garvin, Grady and 15 more	5 hr
Apr 15, 9:04 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Caddo, Canadian, Comanche, Cotton and 10 more	86 min
Apr 15, 11:00 PM CDT	Mesoscale Discussion	SPC	Canadian, Carter, Cleveland, Coal, Cotton, Creek and 21 more	2 hr
Apr 15, 11:20 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Cherokee, Craig, Creek, Delaware, Haskell and 17 more	6 hr
Apr 16, 2:01 AM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Craig, Delaware, Haskell, Latimer and 12 more	119 min
Apr 16, 1:41 AM CDT	Mesoscale Discussion	SPC	Brown, Comanche, Coryell, Erath, Hamilton, Kimble and 8 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.