Alert archive / Arkansas / Mesoscale Discussions in 2007

Mesoscale Discussion 434

April 3, 200724 counties in Arkansas; 22 counties in Mississippi; Fayette County, Hardeman County, Tennessee

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2007, 9:14 PM CDT for 24 counties in Arkansas; 22 counties in Mississippi; Fayette County, Hardeman County, Tennessee. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Apr 3, 2007, 9:14 PM CDT (02:14 UTC)
Expired: Apr 3, 2007, 10:15 PM CDT
In force: 61 min
Issued by: the Storm Prediction Center

All 48 counties

Arkansas County, AR, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Clark County, AR, Cleveland County, AR, Columbia County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Jefferson County, AR, Lee County, AR, Lincoln County, AR, Lonoke County, AR, Monroe County, AR, Nevada County, AR, Ouachita County, AR, Phillips County, AR, Prairie County, AR, Union County, AR, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Chickasaw County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Lafayette County, MS, Lee County, MS, Leflore County, MS, Marshall County, MS, Panola County, MS, Pontotoc County, MS, Quitman County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Union County, MS, Webster County, MS, Yalobusha County, MS, Fayette County, TN, Hardeman County, TN

The radar

The Little Rock radar (KLZK), 95 km from the middle of the area, began a volume at 02:13 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.

Severe Thunderstorm Watch 119Apr 3, 9:55 PM CDT

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 2.2 hours before the alert went out and 197 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: 2532 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1366 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.1

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
Apr 3, 7:41 PM CDT	Mesoscale Discussion	SPC	Clark, Hempstead, Hot Spring, Howard, Little River, Pike and 1 more	2 hr
Apr 3, 9:53 PM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 12 more	5 hr
Apr 4, 2:07 AM CDT	Mesoscale Discussion	SPC	Ashley	113 min
Apr 3, 8:03 PM CDT	Tornado Watch	SPC	Anderson, Bedford, Benton, Bledsoe, Blount, Bradley and 51 more	5 hr
Apr 3, 8:43 PM CDT	Severe Thunderstorm Watch	SPC	Carter, Claiborne, Cocke, Grainger, Greene, Hamblen and 9 more	5 hr
Apr 3, 10:49 PM CDT	Mesoscale Discussion	SPC	Bradley, Carter, Hamilton, Johnson, McMinn, Marion and 2 more	56 min

Nearby

Mesoscale Discussions in Arkansas, 2007 Mesoscale Discussions in Mississippi, 2007 Mesoscale Discussions in Tennessee, 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.