Alert archive / Arkansas / Mesoscale Discussions in 2014

Mesoscale Discussion 266

April 3, 201441 counties in Arkansas; 5 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2014, 4:34 PM CDT for 41 counties in Arkansas; 5 counties in Missouri. It was in force for 26 min.

The area

The outline as issued.

The facts

Issued: Apr 3, 2014, 4:34 PM CDT (21:34 UTC)
Expired: Apr 3, 2014, 5:00 PM CDT
In force: 26 min
Issued by: the Storm Prediction Center

All 46 counties

Baxter County, AR, Boone County, AR, Calhoun County, AR, Clark County, AR, Cleburne County, AR, Conway County, AR, Dallas County, AR, Faulkner County, AR, Fulton County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Johnson County, AR, Lawrence County, AR, Logan County, AR, Lonoke County, AR, Marion County, AR, Montgomery County, AR, Nevada County, AR, Newton County, AR, Ouachita County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Dent County, MO, Howell County, MO, Oregon County, MO, Ozark County, MO, Shannon County, MO

The radar

The Little Rock radar (KLZK), 91 km from the middle of the area, began a volume at 21:38 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

Springfield, MO (KSGF), launched 12:00Z, 9.6 hours before the alert went out and 186 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: 1727 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 686 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 417 m²/s²
0-3 km storm-relative helicity: 423 m²/s²
Significant tornado parameter: 3.5
Supercell composite: 15.3

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
Apr 3, 9:18 AM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Conway and 28 more	57 min
Apr 3, 9:33 AM CDT	Tornado Watch	SPC	Baxter, Benton, Boone, Calhoun, Carroll, Clark and 38 more	7 hr
Apr 3, 12:05 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Clark, Cleburne and 27 more	55 min
Apr 3, 12:33 PM CDT	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more	87 min
Apr 3, 1:15 PM CDT	Tornado Watch	SPC	Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more	8 hr
Apr 3, 1:46 PM CDT	Mesoscale Discussion	SPC	Hempstead, Howard, Little River, Miller, Montgomery, Pike and 4 more	89 min
Apr 3, 1:50 PM CDT	Tornado Watch	SPC	Hempstead, Howard, Lafayette, Little River, Miller, Nevada and 1 more	7 hr
Apr 3, 3:48 PM CDT	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Madison, Washington	57 min
Apr 3, 4:58 PM CDT	Tornado Watch	SPC	Baxter, Boone, Calhoun, Clark, Cleburne, Conway and 31 more	7 hr
Apr 2, 9:36 PM CDT	Mesoscale Discussion	SPC	Barton, Bates, Benton, Camden, Cass, Cedar and 18 more	54 min
Apr 2, 9:59 PM CDT	Severe Thunderstorm Watch	SPC	Barton, Bates, Benton, Camden, Carroll, Cass and 21 more	7 hr
Apr 3, 12:00 AM CDT	Mesoscale Discussion	SPC	Barton, Bates, Benton, Camden, Carroll, Cass and 22 more	90 min
Apr 3, 1:05 AM CDT	Mesoscale Discussion	SPC	Adair, Andrew, Atchison, Buchanan, Caldwell, Clark and 19 more	55 min
Apr 3, 2:49 AM CDT	Mesoscale Discussion	SPC	Adair, Audrain, Barton, Bates, Benton, Boone and 65 more	116 min
Apr 3, 12:28 PM CDT	Mesoscale Discussion	SPC	Bollinger, Butler, Cape Girardeau, Iron, Madison, Mississippi and 7 more	62 min
Apr 3, 12:46 PM CDT	Tornado Watch	SPC	Bollinger, Butler, Cape Girardeau, Carter, Crawford, Iron and 12 more	4 hr
Apr 3, 3:17 PM CDT	Mesoscale Discussion	SPC	Audrain, Boone, Carroll, Chariton, Cooper, Howard and 10 more	58 min

Nearby

Mesoscale Discussions in Arkansas, 2014 Mesoscale Discussions in Missouri, 2014 Every mesoscale discussion in 2014

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.