Alert archive / Mississippi / Mesoscale Discussions in 2006

Mesoscale Discussion 287

March 13, 20066 counties in Alabama; 6 parishes in Louisiana; 23 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Mar 13, 2006, 3:32 PM CST for 6 counties in Alabama; 6 parishes in Louisiana; 23 counties in Mississippi. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Mar 13, 2006, 3:32 PM CST (21:32 UTC)
Expired: Mar 13, 2006, 5:00 PM CST
In force: 88 min
Issued by: the Storm Prediction Center

All 35 counties

Choctaw County, AL, Clarke County, AL, Marengo County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL, East Baton Rouge Parish, LA, Livingston Parish, LA, Saint Helena Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, Amite County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 123 km from the middle of the area, began a volume at 21:35 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, 9.5 hours before the alert went out and 133 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: 9 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 714 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 221 m²/s²
0-3 km storm-relative helicity: 291 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Mar 13, 12:36 PM CST	Mesoscale Discussion	SPC	Colbert, Fayette, Franklin, Lamar, Lauderdale, Lawrence and 6 more	114 min
Mar 13, 1:48 PM CST	Tornado Watch	SPC	Colbert, Cullman, Fayette, Franklin, Greene, Hale and 12 more	6 hr
Mar 13, 3:59 PM CST	Mesoscale Discussion	SPC	Blount, Colbert, Cullman, Fayette, Franklin, Jackson and 13 more	91 min
Mar 13, 5:41 PM CST	Mesoscale Discussion	SPC	Bibb, Blount, Calhoun, Cherokee, Clay, Cleburne and 25 more	64 min
Mar 13, 5:56 PM CST	Tornado Watch	SPC	Bibb, Blount, Calhoun, Cherokee, Chilton, Clay and 11 more	4 hr
Mar 13, 9:02 AM CST	Mesoscale Discussion	SPC	Bolivar, Coahoma, Tunica, Washington	58 min

Nearby

Mesoscale Discussions in Mississippi, 2006 Mesoscale Discussions in Alabama, 2006 Mesoscale Discussions in Louisiana, 2006 Every mesoscale discussion in 2006

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.