Alert archive / Louisiana / Mesoscale Discussions in 2004

Mesoscale Discussion 1383

June 22, 2004Ashley County, Union County, Arkansas; 17 parishes in Louisiana; 8 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2004, 3:10 PM CDT for Ashley County, Union County, Arkansas; 17 parishes in Louisiana; 8 counties in Texas. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Jun 22, 2004, 3:10 PM CDT (20:10 UTC)
Expired: Jun 22, 2004, 4:45 PM CDT
In force: 95 min
Issued by: the Storm Prediction Center

All 27 counties

Ashley County, AR, Union County, AR, Beauregard Parish, LA, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Calcasieu Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Sabine Parish, LA, Union Parish, LA, Vernon Parish, LA, Webster Parish, LA, Jasper County, TX, Jefferson County, TX, Newton County, TX, Orange County, TX, Panola County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 8.2 hours before the alert went out and 144 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: 1624 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 585 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 9 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

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
Jun 21, 7:52 PM CDT	Mesoscale Discussion	SPC	Benton	83 min
Jun 22, 10:27 AM CDT	Mesoscale Discussion	SPC	Ashley, Bradley, Calhoun, Columbia, Lafayette, Miller and 3 more	2 hr
Jun 22, 11:55 AM CDT	Severe Thunderstorm Watch	SPC	Beauregard, Calcasieu, De Soto, Natchitoches, Red River, Sabine and 1 more	5 hr
Jun 21, 8:05 PM CDT	Severe Thunderstorm Watch	SPC	Armstrong, Baylor, Briscoe, Carson, Castro, Childress and 27 more	7 hr
Jun 21, 10:17 PM CDT	Mesoscale Discussion	SPC	Archer, Armstrong, Baylor, Briscoe, Carson, Castro and 28 more	88 min
Jun 21, 11:27 PM CDT	Mesoscale Discussion	SPC	Clay	93 min
Jun 21, 11:44 PM CDT	Mesoscale Discussion	SPC	Armstrong, Baylor, Borden, Briscoe, Callahan, Carson and 56 more	91 min
Jun 22, 2:48 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Crosby, Dickens, Foard and 7 more	27 min
Jun 22, 4:05 AM CDT	Mesoscale Discussion	SPC	Archer, Clay, Cooke, Montague	2 hr

Nearby

Mesoscale Discussions in Louisiana, 2004 Mesoscale Discussions in Texas, 2004 Mesoscale Discussions in Arkansas, 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.