Alert archive / Mississippi / Mesoscale Discussions in 2008

Mesoscale Discussion 2213

September 3, 20087 counties in Arkansas; 25 parishes in Louisiana; 45 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Sep 3, 2008, 9:06 PM CDT for 7 counties in Arkansas; 25 parishes in Louisiana; 45 counties in Mississippi. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Sep 3, 2008, 9:06 PM CDT (02:06 UTC)
Expired: Sep 3, 2008, 10:30 PM CDT
In force: 84 min
Issued by: the Storm Prediction Center

All 77 counties

Arkansas County, AR, Ashley County, AR, Chicot County, AR, Desha County, AR, Lee County, AR, Monroe County, AR, Phillips County, AR, Ascension Parish, LA, Avoyelles Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Carroll Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Iberville Parish, LA, LaSalle Parish, LA, Livingston Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Pointe Coupee Parish, LA, Richland Parish, LA, Saint Helena Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Tangipahoa Parish, LA, Tensas Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Carroll Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Attala County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Choctaw County, MS, Claiborne County, MS, Coahoma County, MS, Copiah County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jefferson County, MS, Jefferson Davis County, MS, Lafayette County, MS, Lawrence County, MS, Leake County, MS, Leflore County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Montgomery County, MS, Panola County, MS, Pike County, MS, Quitman County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Walthall County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Wilkinson County, MS, Yalobusha County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 80 km from the middle of the area, began a volume at 02:07 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

Jackson, MS (KJAN), launched 00:00Z, 2.1 hours before the alert went out and 71 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: 816 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 695 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 246 m²/s²
0-3 km storm-relative helicity: 379 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 10.5

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
Sep 3, 11:25 PM CDT	Mesoscale Discussion	SPC	Lee, Monroe, Phillips, Prairie	95 min
Sep 4, 12:25 PM CDT	Mesoscale Discussion	SPC	Alcorn, Itawamba, Lee, Monroe, Prentiss, Tishomingo	2 hr

Nearby

Mesoscale Discussions in Mississippi, 2008 Mesoscale Discussions in Louisiana, 2008 Mesoscale Discussions in Arkansas, 2008 Every mesoscale discussion in 2008

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.