Alert archive / Arkansas / Mesoscale Discussions in 2023

Mesoscale Discussion 415

March 31, 20239 counties in Arkansas; DeSoto County, Tate County, Tunica County, Mississippi; Shelby County, Tennessee

The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2023, 6:59 PM CDT for 9 counties in Arkansas; DeSoto County, Tate County, Tunica County, Mississippi; Shelby County, Tennessee. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Mar 31, 2023, 6:59 PM CDT (23:59 UTC)
Expired: Mar 31, 2023, 8:00 PM CDT
In force: 61 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 94

Counties Arkansas County, AR, Crittenden County, AR, Cross County, AR, Lee County, AR, Monroe County, AR, Phillips County, AR, Prairie County, AR, St. Francis County, AR, Woodruff County, AR, DeSoto County, MS, Tate County, MS, Tunica County, MS, Shelby County, TN

The radar

The Memphis radar (KNQA), 81 km from the middle of the area, began a volume at 00:05 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 nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 12.0 hours before the alert went out and 50 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: 30 J/kg
Mixed-layer CIN: -335 J/kg
Mixed-layer LCL: 806 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 490 m²/s²
0-3 km storm-relative helicity: 655 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 31, 10:44 AM CDT	Mesoscale Discussion	SPC	Arkansas, Clark, Cleburne, Cleveland, Conway, Craighead and 49 more	2 hr
Mar 31, 10:47 AM CDT	Mesoscale Discussion	SPC	Arkansas, Crittenden, Cross, Jefferson, Lee, Lincoln and 5 more	58 min
Mar 31, 12:28 PM CDT	Tornado Watch PDS	SPC	Arkansas, Baxter, Boone, Bradley, Calhoun, Clark and 60 more	11 hr
Mar 31, 1:42 PM CDT	Mesoscale Discussion	SPC	Clark, Conway, Faulkner, Garland, Grant, Hot Spring and 7 more	93 min
Mar 31, 2:36 PM CDT	Mesoscale Discussion	SPC	Lonoke, Prairie, Pulaski, White, Woodruff	24 min
Mar 31, 3:42 PM CDT	Mesoscale Discussion	SPC	Arkansas, Clark, Clay, Cleburne, Cleveland, Conway and 47 more	93 min
Mar 31, 4:53 PM CDT	Mesoscale Discussion	SPC	Columbia, Hempstead, Lafayette, Little River, Miller, Nevada	2 hr
Mar 31, 6:34 PM CDT	Mesoscale Discussion	SPC	Arkansas, Crittenden, Cross, Lee, Monroe, Phillips and 3 more	56 min
Mar 31, 5:28 PM CDT	Mesoscale Discussion	SPC	Alcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 21 more	92 min
Mar 31, 5:58 PM CDT	Tornado Watch PDS	SPC	Alcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more	6 hr
Mar 31, 5:14 PM CDT	Mesoscale Discussion	SPC	Shelby, Tipton	31 min

Nearby

Mesoscale Discussions in Arkansas, 2023 Mesoscale Discussions in Mississippi, 2023 Mesoscale Discussions in Tennessee, 2023 Every mesoscale discussion in 2023

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.