Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 551

April 23, 20034 counties in Oklahoma; 21 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 23, 2003, 8:43 PM CDT for 4 counties in Oklahoma; 21 counties in Texas. It was in force for 77 min.

The area

The outline as issued.

The facts

Issued: Apr 23, 2003, 8:43 PM CDT (01:43 UTC)
Expired: Apr 23, 2003, 10:00 PM CDT
In force: 77 min
Issued by: the Storm Prediction Center

All 25 counties

Comanche County, OK, Cotton County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Brown County, TX, Callahan County, TX, Clay County, TX, Coleman County, TX, Concho County, TX, Eastland County, TX, Haskell County, TX, Jones County, TX, Knox County, TX, McCulloch County, TX, Runnels County, TX, Shackelford County, TX, Stephens County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Wichita County, TX, Wilbarger County, TX, Young County, TX

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 1.7 hours before the alert went out and 209 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: 1767 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 673 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 382 m²/s²
0-3 km storm-relative helicity: 447 m²/s²
Significant tornado parameter: 3.4
Supercell composite: 8.2

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 23, 7:03 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Jefferson, Johnston, Love and 2 more	117 min
Apr 23, 9:35 PM CDT	Severe Thunderstorm Watch	SPC	Atoka, Bryan, Carter, Choctaw, Cleveland, Coal and 20 more	5 hr
Apr 23, 11:43 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Choctaw, Haskell, Latimer, LeFlore and 6 more	2 hr
Apr 24, 1:11 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Garfield, Grant, Kingfisher, Major	2 hr
Apr 23, 7:00 PM CDT	Mesoscale Discussion	SPC	Crockett, Edwards, Kimble, Kinney, Mason, Menard and 5 more	90 min
Apr 23, 7:45 PM CDT	Tornado Watch	SPC	Bandera, Bexar, Blanco, Burnet, Caldwell, Comal and 11 more	4 hr
Apr 24, 2:41 AM CDT	Mesoscale Discussion	SPC	Anderson, Bell, Cass, Cherokee, Falls, Freestone and 12 more	2 hr
Apr 24, 6:30 AM CDT	Severe Thunderstorm Watch	SPC	Angelina, Hardin, Jasper, Newton, Sabine, San Augustine and 2 more	5 hr
Apr 24, 6:40 AM CDT	Severe Thunderstorm Watch	SPC	Angelina, Hardin, Jasper, Newton, Sabine, San Augustine and 2 more	4 hr
Apr 24, 7:14 AM CDT	Mesoscale Discussion	SPC	Austin, Bastrop, Brazoria, Brazos, Burleson, Caldwell and 22 more	2 hr
Apr 24, 7:30 AM CDT	Tornado Watch	SPC	Angelina, Austin, Brazoria, Brazos, Burleson, Chambers and 17 more	6 hr
Apr 24, 9:11 AM CDT	Mesoscale Discussion	SPC	Fort Bend, Harris, Liberty, Montgomery, Polk, San Jacinto	2 hr
Apr 24, 11:40 AM CDT	Mesoscale Discussion	SPC	Sabine, San Augustine, Shelby	65 min

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.