Alert archive / Arkansas / Mesoscale Discussions in 2006

Mesoscale Discussion 46

January 12, 200641 counties in Arkansas; 17 parishes in Louisiana; 10 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jan 12, 2006, 11:10 PM CST for 41 counties in Arkansas; 17 parishes in Louisiana; 10 counties in Texas. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued
Jan 12, 2006, 11:10 PM CST (05:10 UTC)
Expired
Jan 13, 2006, 12:45 AM CST
In force
95 min
Issued by
the Storm Prediction Center
All 68 counties

Arkansas County, AR, Ashley County, AR, Baxter County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Clark County, AR, Cleburne County, AR, Cleveland County, AR, Columbia County, AR, Conway County, AR, Dallas County, AR, Drew County, AR, Faulkner County, AR, Fulton County, AR, Garland County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Independence County, AR, Izard County, AR, Jefferson County, AR, Lafayette County, AR, Lincoln County, AR, Lonoke County, AR, Marion County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Perry County, AR, Pike County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Union County, AR, Van Buren County, AR, White County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Richland Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Cass County, TX, Cherokee County, TX, Gregg County, TX, Harrison County, TX, Marion County, TX, Panola County, TX, Rusk County, TX, Shelby County, TX, Smith County, TX, Upshur County, TX

The radar

The Little Rock radar (KLZK), 76 km from the middle of the area, began a volume at 05:13 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 5.2 hours before the alert went out and 228 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-pSkew-T log-p diagram, Shreveport, LA at 00:00Z on 2006-01-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 803 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 00:00Z on 2006-01-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 208 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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.

IssuedProductOfficeCountiesLasted
Jan 12, 6:53 PM CSTTornado WatchSPCBaxter, Benton, Boone, Carroll, Clark, Cleburne and 39 more7 hr
Jan 12, 9:52 PM CSTMesoscale DiscussionSPCBaxter, Boone, Clark, Cleburne, Columbia, Conway and 32 more83 min
Jan 12, 11:48 PM CSTTornado WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clay and 24 more6 hr
Jan 13, 1:08 AM CSTMesoscale DiscussionSPCCleburne, Columbia, Dallas, Faulkner, Fulton, Hot Spring and 6 more37 min
Jan 13, 1:47 AM CSTMesoscale DiscussionSPCEast Baton Rouge, East Feliciana, Livingston, Saint Helena, Saint Tammany, Tangipahoa and 2 more88 min
Jan 13, 2:14 AM CSTTornado WatchSPCAcadia, Allen, Ascension, Assumption, Avoyelles, East Baton Rouge and 28 more8 hr
Jan 13, 4:00 AM CSTMesoscale DiscussionSPCCatahoula, Concordia, East Carroll, Franklin, LaSalle, Madison and 1 more60 min
Jan 13, 5:20 AM CSTMesoscale DiscussionSPCAcadia, Ascension, Assumption, Avoyelles, Concordia, East Baton Rouge and 22 more85 min

Nearby

Mesoscale Discussions in Arkansas, 2006Mesoscale Discussions in Louisiana, 2006Mesoscale Discussions in Texas, 2006Every 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.