Alert archive / Mississippi / Mesoscale Discussions in 2003

Mesoscale Discussion 1340

June 11, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2003, 9:18 PM CDT for 4 states. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Jun 11, 2003, 9:18 PM CDT (02:18 UTC)
Expired: Jun 11, 2003, 10:45 PM CDT
In force: 87 min
Issued by: the Storm Prediction Center

All 38 counties

Bibb County, AL, Chilton County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Pickens County, AL, Shelby County, AL, St. Clair County, AL, Tuscaloosa County, AL, Walker County, AL, Chicot County, AR, East Carroll Parish, LA, West Carroll Parish, LA, Attala County, MS, Carroll County, MS, Choctaw County, MS, Clay County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Kemper County, MS, Leake County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Noxubee County, MS, Oktibbeha County, MS, Sharkey County, MS, Sunflower County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yazoo County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 2.3 hours before the alert went out and 87 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: 1555 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1169 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 153 m²/s²
0-3 km storm-relative helicity: 199 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.7

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 11, 7:50 PM CDT	Severe Thunderstorm Watch	SPC	Bibb, Chilton, Coosa, Fayette, Greene, Hale and 10 more	5 hr
Jun 12, 8:51 AM CDT	Mesoscale Discussion	SPC	Washington	84 min
Jun 12, 9:10 AM CDT	Severe Thunderstorm Watch	SPC	Baldwin, Choctaw, Clarke, Mobile, Washington	5 hr
Jun 12, 11:10 AM CDT	Mesoscale Discussion	SPC	Choctaw, Clarke, Mobile, Washington	95 min
Jun 12, 1:15 PM CDT	Mesoscale Discussion	SPC	Clarke, Mobile, Washington	60 min
Jun 12, 1:34 PM CDT	Mesoscale Discussion	SPC	Autauga, Bibb, Blount, Chambers, Chilton, Clay and 19 more	86 min
Jun 11, 7:14 PM CDT	Mesoscale Discussion	SPC	Arkansas, Cleveland, Desha, Grant, Jefferson, Lincoln and 1 more	2 hr
Jun 11, 10:25 PM CDT	Severe Thunderstorm Watch	SPC	Crawford, Howard, Montgomery, Pike, Polk, Scott and 2 more	5 hr
Jun 12, 12:14 AM CDT	Mesoscale Discussion	SPC	Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 7 more	2 hr
Jun 12, 1:10 AM CDT	Severe Thunderstorm Watch	SPC	Hempstead, Lafayette, Little River, Miller, Nevada	4 hr
Jun 12, 4:20 AM CDT	Mesoscale Discussion	SPC	Columbia, Lafayette, Miller	55 min
Jun 12, 12:30 AM CDT	Mesoscale Discussion	SPC	Bossier, Caddo, De Soto	2 hr
Jun 12, 4:40 PM CDT	Severe Thunderstorm Watch	SPC	East Baton Rouge, East Feliciana, Livingston, Saint Helena, Saint Tammany, Tangipahoa 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.