Alert archive / Mississippi / Mesoscale Discussions in 2008

Mesoscale Discussion 2269

September 14, 20085 states

The Storm Prediction Center issued this mesoscale discussion at Sep 14, 2008, 6:24 AM CDT for 5 states. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Sep 14, 2008, 6:24 AM CDT (11:24 UTC)
Expired: Sep 14, 2008, 8:00 AM CDT
In force: 96 min
Issued by: the Storm Prediction Center

All 75 counties

Ashley County, AR, Chicot County, AR, Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Desha County, AR, Greene County, AR, Lawrence County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, St. Francis County, AR, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Rapides Parish, LA, Richland Parish, LA, Saint Landry Parish, LA, Tensas Parish, LA, Vernon Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Dunklin County, MO, Pemiscot County, MO, Adams County, MS, Bolivar County, MS, Carroll County, MS, Claiborne County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jefferson County, MS, Lafayette County, MS, Leflore County, MS, Marshall County, MS, Panola County, MS, Quitman County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Warren County, MS, Washington County, MS, Wilkinson County, MS, Yalobusha County, MS, Yazoo County, MS, Crockett County, TN, Dyer County, TN, Fayette County, TN, Haywood County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN

The radar

The Jackson/Brandon,MS radar (KDGX), 177 km from the middle of the area, began a volume at 11:24 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, 11.4 hours before the alert went out and 167 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: 2486 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 544 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 214 m²/s²
0-3 km storm-relative helicity: 272 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.9

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 13, 7:03 PM CDT	Tornado Watch	SPC	Ashley, Chicot, Columbia, Union	7 hr
Sep 13, 7:37 PM CDT	Mesoscale Discussion	SPC	Arkansas, Baxter, Boone, Bradley, Calhoun, Clark and 44 more	53 min
Sep 13, 11:03 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Baxter, Boone, Bradley, Chicot and 33 more	57 min
Sep 14, 1:28 AM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Chicot, Desha, Drew, Phillips	92 min
Sep 14, 1:57 AM CDT	Tornado Watch	SPC	Ashley, Chicot, Clay, Craighead, Crittenden, Cross and 8 more	8 hr
Sep 14, 2:06 AM CDT	Mesoscale Discussion	SPC	Baxter, Boone, Fulton, Marion	84 min
Sep 14, 9:21 AM CDT	Mesoscale Discussion	SPC	Acadia, Avoyelles, Caldwell, Catahoula, Concordia, East Carroll and 13 more	84 min

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.