Alert archive / Mississippi / Mesoscale Discussions in 2008

Mesoscale Discussion 47

January 10, 200812 parishes in Louisiana; 51 counties in Mississippi; McNairy County, Tennessee

The Storm Prediction Center issued this mesoscale discussion at Jan 10, 2008, 12:09 PM CST for 12 parishes in Louisiana; 51 counties in Mississippi; McNairy County, Tennessee. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Jan 10, 2008, 12:09 PM CST (18:09 UTC)
Expired: Jan 10, 2008, 1:45 PM CST
In force: 96 min
Issued by: the Storm Prediction Center

All 64 counties

Avoyelles Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Livingston Parish, LA, Pointe Coupee Parish, LA, Saint Helena Parish, LA, Saint Landry Parish, LA, Tangipahoa Parish, LA, Tensas Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Adams County, MS, Alcorn County, MS, Amite County, MS, Attala County, MS, Benton County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clay County, MS, Copiah County, MS, Covington County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Itawamba County, MS, Jefferson County, MS, Jefferson Davis County, MS, Lafayette 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, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Oktibbeha County, MS, Pike County, MS, Pontotoc County, MS, Prentiss County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Walthall County, MS, Warren County, MS, Webster County, MS, Wilkinson County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS, McNairy County, TN

The radar

The Jackson/Brandon,MS radar (KDGX), 48 km from the middle of the area, began a volume at 18:09 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 12:00Z, 6.2 hours before the alert went out and 38 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: 315 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 592 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 193 m²/s²
0-3 km storm-relative helicity: 189 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.3

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
Jan 10, 3:25 AM CST	Mesoscale Discussion	SPC	Bienville, Bossier, Caddo, Claiborne, De Soto, East Carroll and 10 more	2 hr
Jan 10, 7:17 AM CST	Mesoscale Discussion	SPC	Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 43 more	118 min
Jan 10, 7:46 AM CST	Tornado Watch	SPC	Avoyelles, Catahoula, Concordia, East Baton Rouge, East Carroll, East Feliciana and 14 more	8 hr
Jan 10, 10:11 AM CST	Mesoscale Discussion	SPC	Concordia, East Baton Rouge, East Feliciana, Pointe Coupee, Saint Helena, Tangipahoa and 3 more	64 min
Jan 10, 11:33 AM CST	Tornado Watch PDS	SPC	Ascension, Assumption, Iberville, Jefferson, Lafourche, Orleans and 7 more	9 hr
Jan 10, 1:42 PM CST	Mesoscale Discussion	SPC	Ascension, East Baton Rouge, East Feliciana, Iberville, Livingston, Pointe Coupee and 7 more	93 min
Jan 10, 3:42 PM CST	Mesoscale Discussion	SPC	Ascension, Assumption, East Baton Rouge, Iberville, Livingston, Orleans and 8 more	93 min
Jan 10, 5:25 PM CST	Mesoscale Discussion	SPC	Ascension, Assumption, Jefferson, Lafourche, Livingston, Orleans and 9 more	95 min
Jan 10, 9:23 AM CST	Mesoscale Discussion	SPC	Alcorn, Calhoun, Chickasaw, Choctaw, Clay, Itawamba and 13 more	67 min
Jan 10, 3:05 PM CST	Mesoscale Discussion	SPC	Clarke, Covington, Forrest, Greene, Jasper, Jefferson Davis and 14 more	115 min
Jan 10, 7:52 AM CST	Mesoscale Discussion	SPC	Cannon, Cheatham, Clay, Davidson, DeKalb, Dickson and 14 more	113 min

Nearby

Mesoscale Discussions in Mississippi, 2008 Mesoscale Discussions in Louisiana, 2008 Mesoscale Discussions in Tennessee, 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.