Alert archive / Mississippi / Mesoscale Discussions in 2007

Mesoscale Discussion 202

February 24, 20074 states

The Storm Prediction Center issued this mesoscale discussion at Feb 24, 2007, 6:44 PM CST for 4 states. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Feb 24, 2007, 6:44 PM CST (00:44 UTC)
Expired: Feb 24, 2007, 7:45 PM CST
In force: 61 min
Issued by: the Storm Prediction Center

All 101 counties

Arkansas County, AR, Ashley County, AR, Chicot County, AR, Crittenden County, AR, Cross County, AR, Desha County, AR, Drew County, AR, Jackson County, AR, Lee County, AR, Lincoln County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, St. Francis County, AR, Woodruff County, AR, Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Grant Parish, LA, LaSalle Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Adams County, MS, Alcorn County, MS, Amite County, MS, Attala County, MS, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clay County, MS, Coahoma County, MS, Copiah County, MS, Covington County, MS, DeSoto County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Lafayette County, MS, Lamar County, MS, Lawrence County, MS, Leake County, MS, Lee County, MS, Leflore County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Marshall County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Oktibbeha County, MS, Panola County, MS, Pike County, MS, Pontotoc County, MS, Prentiss 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, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Walthall County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS, Chester County, TN, Fayette County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Madison County, TN, McNairy County, TN, Shelby County, TN, Tipton County, TN

The radar

The Jackson/Brandon,MS radar (KDGX), 113 km from the middle of the area, began a volume at 00:45 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 33Feb 24, 7:55 PM CST

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 0.7 hours before the alert went out and 103 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: 311 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 817 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 409 m²/s²
0-3 km storm-relative helicity: 662 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 5.1

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
Feb 24, 7:52 PM CST	Tornado Watch	SPC	Concordia, Madison, Tensas	7 hr
Feb 24, 10:11 PM CST	Mesoscale Discussion	SPC	Concordia	64 min
Feb 25, 1:29 AM CST	Mesoscale Discussion	SPC	George, Greene	61 min

Nearby

Mesoscale Discussions in Mississippi, 2007 Mesoscale Discussions in Arkansas, 2007 Mesoscale Discussions in Louisiana, 2007 Every mesoscale discussion in 2007

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.