Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 362

April 3, 200314 counties in Oklahoma; 16 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2003, 2:40 PM CST for 14 counties in Oklahoma; 16 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Apr 3, 2003, 2:40 PM CST (20:40 UTC)
Expired: Apr 3, 2003, 5:45 PM CST
In force: 3 hr
Issued by: the Storm Prediction Center

All 30 counties

Beckham County, OK, Blaine County, OK, Caddo County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Roger Mills County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Eastland County, TX, Foard County, TX, Hardeman County, TX, Haskell County, TX, Jack County, TX, Knox County, TX, Palo Pinto County, TX, Shackelford County, TX, Stephens County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Young County, TX

The radar

The Altus AFB radar (KFDR), 63 km from the middle of the area, began a volume at 20:43 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 83Apr 3, 3:20 PM CST

The nearest sounding before it

Fort Sill, OK (KFSI), launched 12:00Z, 8.7 hours before the alert went out and 116 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1063 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 472 m²/s²
0-3 km storm-relative helicity: 506 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
Apr 3, 3:20 PM CST	Severe Thunderstorm Watch	SPC	Beckham, Caddo, Canadian, Carter, Cleveland, Comanche and 16 more	5 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.