Alert archive / Mississippi / Mesoscale Discussions in 2003

Mesoscale Discussion 1388

June 14, 200311 counties in Alabama; Washington Parish, Louisiana; 12 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jun 14, 2003, 3:06 PM CDT for 11 counties in Alabama; Washington Parish, Louisiana; 12 counties in Mississippi. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Jun 14, 2003, 3:06 PM CDT (20:06 UTC)
Expired: Jun 14, 2003, 5:00 PM CDT
In force: 114 min
Issued by: the Storm Prediction Center

All 24 counties

Butler County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Dallas County, AL, Lowndes County, AL, Marengo County, AL, Monroe County, AL, Montgomery County, AL, Washington County, AL, Wilcox County, AL, Washington Parish, LA, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Jones County, MS, Lamar County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 8.1 hours before the alert went out and 160 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: 1045 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 600 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

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
Jun 13, 7:35 PM CDT	Severe Thunderstorm Watch	SPC	Acadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 2 more	4 hr

Nearby

Mesoscale Discussions in Mississippi, 2003 Mesoscale Discussions in Alabama, 2003 Mesoscale Discussions in Louisiana, 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.