Alert archive / Arkansas / Mesoscale Discussions in 2016

Mesoscale Discussion 292

March 30, 201623 counties in Arkansas; 6 parishes in Louisiana; 6 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2016, 6:15 PM CDT for 23 counties in Arkansas; 6 parishes in Louisiana; 6 counties in Mississippi. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Mar 30, 2016, 6:15 PM CDT (23:15 UTC)
Expired: Mar 30, 2016, 7:45 PM CDT
In force: 90 min
Issued by: the Storm Prediction Center

All 35 counties

Arkansas County, AR, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Cleveland County, AR, Columbia County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Grant County, AR, Jefferson County, AR, Lee County, AR, Lincoln County, AR, Lonoke County, AR, Monroe County, AR, Ouachita County, AR, Phillips County, AR, Prairie County, AR, Pulaski County, AR, St. Francis County, AR, Union County, AR, Woodruff County, AR, Claiborne Parish, LA, East Carroll Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Union Parish, LA, West Carroll Parish, LA, Bolivar County, MS, Coahoma County, MS, Quitman County, MS, Sunflower County, MS, Tunica County, MS, Washington County, MS

The radar

The Little Rock radar (KLZK), 129 km from the middle of the area, began a volume at 23:15 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 (KBYH), launched 12:00Z, 11.3 hours before the alert went out and 191 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: 26 J/kg
Mixed-layer CIN: -551 J/kg
Mixed-layer LCL: 938 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 30, 11:57 AM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Clark, Conway and 27 more	63 min
Mar 30, 2:07 PM CDT	Mesoscale Discussion	SPC	Columbia, Hempstead, Lafayette, Little River, Miller, Nevada and 1 more	83 min
Mar 30, 2:31 PM CDT	Tornado Watch	SPC	Arkansas, Bradley, Calhoun, Clark, Cleveland, Columbia and 23 more	7 hr
Mar 30, 5:06 PM CDT	Mesoscale Discussion	SPC	Calhoun, Clark, Columbia, Dallas, Hempstead, Lafayette and 5 more	84 min
Mar 30, 6:53 PM CDT	Tornado Watch	SPC	Ashley, Chicot, Craighead, Crittenden, Cross, Lee and 4 more	8 hr
Mar 30, 3:53 PM CDT	Mesoscale Discussion	SPC	Allen, Avoyelles, Evangeline, Grant, LaSalle, Pointe Coupee and 3 more	97 min

Nearby

Mesoscale Discussions in Arkansas, 2016 Mesoscale Discussions in Louisiana, 2016 Mesoscale Discussions in Mississippi, 2016 Every mesoscale discussion in 2016

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.