Alert archive / Arkansas / Mesoscale Discussions in 2004

Mesoscale Discussion 1245

June 13, 20044 states

The Storm Prediction Center issued this mesoscale discussion at Jun 13, 2004, 1:57 PM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 13, 2004, 1:57 PM CDT (18:57 UTC)
Expired: Jun 13, 2004, 4:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 50 counties

Arkansas County, AR, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Clark County, AR, Cleveland County, AR, Columbia County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Hempstead County, AR, Lafayette County, AR, Lincoln County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Union County, AR, Bossier Parish, LA, Caddo Parish, LA, Claiborne Parish, LA, East Carroll Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Bolivar County, MS, Coahoma County, MS, Humphreys County, MS, Leflore County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Washington County, MS, Bowie County, TX, Camp County, TX, Cass County, TX, Delta County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Hopkins County, TX, Marion County, TX, Morris County, TX, Red River County, TX, Titus County, TX, Upshur County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 147 km from the middle of the area, began a volume at 18:56 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

Shreveport, LA (KSHV), launched 12:00Z, 7.0 hours before the alert went out and 139 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: 875 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1012 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -56 m²/s²
0-3 km storm-relative helicity: -49 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
Jun 13, 10:29 AM CDT	Mesoscale Discussion	SPC	Crittenden, Mississippi	2 hr
Jun 13, 11:40 AM CDT	Severe Thunderstorm Watch	SPC	Crittenden, Lee, Phillips	5 hr
Jun 12, 9:05 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Callahan, Coke, Coleman, Comanche, Eastland and 10 more	6 hr
Jun 12, 10:45 PM CDT	Severe Thunderstorm Watch	SPC	Archer, Baylor, Clay, Collin, Cooke, Denton and 10 more	4 hr
Jun 12, 11:24 PM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coke, Coleman, Comanche, Eastland and 11 more	96 min
Jun 13, 5:06 PM CDT	Mesoscale Discussion	SPC	Coke, Fisher, Nolan, Schleicher, Tom Green	2 hr

Nearby

Mesoscale Discussions in Arkansas, 2004 Mesoscale Discussions in Texas, 2004 Mesoscale Discussions in Louisiana, 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; radar from the NEXRAD Level II archive.