Alert archive / Arkansas / Mesoscale Discussions in 2006

Mesoscale Discussion 47

January 13, 200612 counties in Arkansas; Bossier Parish, Webster Parish, Louisiana

The Storm Prediction Center issued this mesoscale discussion at Jan 13, 2006, 1:08 AM CST for 12 counties in Arkansas; Bossier Parish, Webster Parish, Louisiana. It was in force for 37 min.

The area

The outline as issued.

The facts

Issued: Jan 13, 2006, 1:08 AM CST (07:08 UTC)
Expired: Jan 13, 2006, 1:45 AM CST
In force: 37 min
Issued by: the Storm Prediction Center

Counties Cleburne County, AR, Columbia County, AR, Dallas County, AR, Faulkner County, AR, Fulton County, AR, Hot Spring County, AR, Izard County, AR, Nevada County, AR, Ouachita County, AR, Pulaski County, AR, Saline County, AR, Stone County, AR, Bossier Parish, LA, Webster Parish, LA

The radar

The Little Rock radar (KLZK), 129 km from the middle of the area, began a volume at 07:08 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

Shreveport, LA (KSHV), launched 00:00Z, 7.1 hours before the alert went out and 168 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: 803 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 941 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 208 m²/s²
0-3 km storm-relative helicity: 314 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 3.3

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 12, 6:53 PM CST	Tornado Watch	SPC	Baxter, Benton, Boone, Carroll, Clark, Cleburne and 39 more	7 hr
Jan 12, 9:52 PM CST	Mesoscale Discussion	SPC	Baxter, Boone, Clark, Cleburne, Columbia, Conway and 32 more	83 min
Jan 12, 11:10 PM CST	Mesoscale Discussion	SPC	Arkansas, Ashley, Baxter, Bradley, Calhoun, Chicot and 35 more	95 min
Jan 12, 11:48 PM CST	Tornado Watch	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clay and 24 more	6 hr
Jan 13, 1:47 AM CST	Mesoscale Discussion	SPC	East Baton Rouge, East Feliciana, Livingston, Saint Helena, Saint Tammany, Tangipahoa and 2 more	88 min
Jan 13, 2:14 AM CST	Tornado Watch	SPC	Acadia, Allen, Ascension, Assumption, Avoyelles, East Baton Rouge and 28 more	8 hr
Jan 13, 4:00 AM CST	Mesoscale Discussion	SPC	Catahoula, Concordia, East Carroll, Franklin, LaSalle, Madison and 1 more	60 min
Jan 13, 5:20 AM CST	Mesoscale Discussion	SPC	Acadia, Ascension, Assumption, Avoyelles, Concordia, East Baton Rouge and 22 more	85 min

Nearby

Mesoscale Discussions in Arkansas, 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.