Alert archive / Louisiana / Mesoscale Discussions in 2006

Mesoscale Discussion 111

February 3, 20064 states

The Storm Prediction Center issued this mesoscale discussion at Feb 3, 2006, 2:34 PM CST for 4 states. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Feb 3, 2006, 2:34 PM CST (20:34 UTC)
Expired: Feb 3, 2006, 4:30 PM CST
In force: 116 min
Issued by: the Storm Prediction Center

All 35 counties

Ashley County, AR, Chicot County, AR, Bienville Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, De Soto Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Rapides Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Tensas Parish, LA, Union Parish, LA, Vernon Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Humphreys County, MS, Issaquena County, MS, Sharkey County, MS, Washington County, MS, Yazoo County, MS, Angelina County, TX, Nacogdoches County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX

The radar

The Shreveport radar (KSHV), 81 km from the middle of the area, began a volume at 20:33 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 8.6 hours before the alert went out and 208 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1572 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 50 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
Feb 3, 10:19 AM CST	Mesoscale Discussion	SPC	Ashley, Chicot	2 hr
Feb 3, 12:10 PM CST	Severe Thunderstorm Watch	SPC	Caldwell, Catahoula, Concordia, East Carroll, Franklin, Grant and 9 more	6 hr
Feb 3, 5:04 PM CST	Severe Thunderstorm Watch	SPC	Greene, Perry, Wayne	5 hr

Nearby

Mesoscale Discussions in Louisiana, 2006 Mesoscale Discussions in Mississippi, 2006 Mesoscale Discussions in Texas, 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.