Alert archive / Arkansas / Mesoscale Discussions in 2007

Mesoscale Discussion 194

February 24, 20076 states

The Storm Prediction Center issued this mesoscale discussion at Feb 24, 2007, 10:35 AM CST for 6 states. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Feb 24, 2007, 10:35 AM CST (16:35 UTC)
Expired: Feb 24, 2007, 12:30 PM CST
In force: 115 min
Issued by: the Storm Prediction Center

All 109 counties

Arkansas County, AR, Ashley County, AR, Baxter County, AR, Boone County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Clark County, AR, Clay County, AR, Cleburne County, AR, Cleveland County, AR, Columbia County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Fulton County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Johnson County, AR, Lafayette County, AR, Lawrence County, AR, Lee County, AR, Lincoln County, AR, Little River County, AR, Logan County, AR, Lonoke County, AR, Marion County, AR, Miller County, AR, Mississippi County, AR, Monroe County, AR, Montgomery County, AR, Nevada County, AR, Newton County, AR, Ouachita County, AR, Perry County, AR, Phillips County, AR, Pike County, AR, Poinsett County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Searcy County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Union County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, East Carroll Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Morehouse 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, Butler County, MO, Carter County, MO, Dunklin County, MO, Howell County, MO, Oregon County, MO, Ozark County, MO, Pemiscot County, MO, Ripley County, MO, Bolivar County, MS, Coahoma County, MS, DeSoto County, MS, Leflore County, MS, Panola County, MS, Quitman County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Washington County, MS, Lauderdale County, TN, Shelby County, TN, Tipton County, TN, Bowie County, TX, Cass County, TX, Harrison County, TX, Marion County, TX, Panola County, TX

The radar

The Little Rock radar (KLZK), 52 km from the middle of the area, began a volume at 16:37 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.

Tornado Watch 32Feb 24, 1:10 PM CST

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 4.6 hours before the alert went out and 232 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: 746 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 555 m²/s²
0-3 km storm-relative helicity: 565 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 24, 8:29 AM CST	Mesoscale Discussion	SPC	Calhoun, Clark, Columbia, Conway, Crawford, Dallas and 31 more	61 min
Feb 24, 8:47 AM CST	Tornado Watch PDS	SPC	Arkansas, Bradley, Calhoun, Clark, Cleburne, Cleveland and 42 more	9 hr
Feb 24, 1:10 PM CST	Tornado Watch PDS	SPC	Ashley, Chicot, Crittenden, Cross, Lee, Phillips and 1 more	7 hr
Feb 24, 1:45 PM CST	Mesoscale Discussion	SPC	Ashley, Bradley, Chicot, Desha, Drew, Lincoln	2 hr
Feb 24, 3:49 PM CST	Mesoscale Discussion	SPC	Ashley, Chicot, Desha, Drew, Phillips	86 min
Feb 24, 4:31 PM CST	Mesoscale Discussion	SPC	Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 12 more	59 min
Feb 23, 6:15 PM CST	Mesoscale Discussion	SPC	Armstrong, Briscoe, Childress, Collingsworth, Cottle, Crosby and 19 more	90 min
Feb 23, 7:35 PM CST	Mesoscale Discussion	SPC	Wichita, Wilbarger	85 min
Feb 23, 9:01 PM CST	Mesoscale Discussion	SPC	Archer, Armstrong, Baylor, Briscoe, Childress, Clay and 28 more	89 min
Feb 23, 9:26 PM CST	Tornado Watch	SPC	Archer, Baylor, Callahan, Childress, Clay, Collingsworth and 35 more	9 hr
Feb 23, 11:35 PM CST	Mesoscale Discussion	SPC	Collin, Cooke, Dallas, Delta, Denton, Ellis and 12 more	115 min
Feb 24, 3:38 AM CST	Mesoscale Discussion	SPC	Archer, Baylor, Callahan, Clay, Cooke, Eastland and 19 more	97 min
Feb 24, 5:20 AM CST	Mesoscale Discussion	SPC	Comanche, Cooke, Eastland, Erath, Hood, Jack and 4 more	55 min

Nearby

Mesoscale Discussions in Arkansas, 2007 Mesoscale Discussions in Louisiana, 2007 Mesoscale Discussions in Mississippi, 2007 Every mesoscale discussion in 2007

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.