Alert archive / Arkansas / Mesoscale Discussions in 2006

Mesoscale Discussion 405

April 2, 200648 counties in Arkansas

The Storm Prediction Center issued this mesoscale discussion at Apr 2, 2006, 2:15 PM CDT for 48 counties in Arkansas. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Apr 2, 2006, 2:15 PM CDT (19:15 UTC)
Expired: Apr 2, 2006, 3:45 PM CDT
In force: 90 min
Issued by: the Storm Prediction Center

All 48 counties

Arkansas County, AR, Baxter County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleburne County, AR, Cleveland County, AR, Columbia County, AR, Conway 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, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Lafayette County, AR, Lawrence County, AR, Lincoln County, AR, Lonoke County, AR, Monroe County, AR, Montgomery County, AR, Nevada County, AR, Ouachita County, AR, Perry County, AR, Pike County, AR, Poinsett County, AR, Pope County, AR, Prairie County, AR, Pulaski 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

The radar

The Little Rock radar (KLZK), 18 km from the middle of the area, began a volume at 19:15 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

Little Rock, AR (KLZK), launched 12:00Z, 7.3 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-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: 258 J/kg
Mixed-layer CIN: -207 J/kg
Mixed-layer LCL: 540 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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 1, 6:30 PM CST	Mesoscale Discussion	SPC	Arkansas, Cleveland, Conway, Crawford, Dallas, Faulkner and 21 more	90 min
Apr 1, 11:36 PM CST	Severe Thunderstorm Watch	SPC	Benton, Carroll, Madison, Washington	4 hr
Apr 2, 12:44 AM CST	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 8 more	2 hr
Apr 2, 10:42 AM CDT	Mesoscale Discussion	SPC	Arkansas, Clay, Cleveland, Craighead, Crittenden, Cross and 19 more	93 min
Apr 2, 11:34 AM CDT	Severe Thunderstorm Watch	SPC	Columbia, Lafayette, Miller, Nevada	6 hr
Apr 2, 3:27 PM CDT	Tornado Watch	SPC	Baxter, Boone, Clay, Cleburne, Conway, Craighead and 25 more	7 hr
Apr 2, 4:40 PM CDT	Tornado Watch	SPC	Arkansas, Ashley, Chicot, Craighead, Crittenden, Cross and 12 more	6 hr

Nearby

Mesoscale Discussions in Arkansas, 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.