Alert archive / Mississippi / Mesoscale Discussions in 2022

Mesoscale Discussion 504

April 16, 202231 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Apr 16, 2022, 11:39 AM CDT for 31 counties in Mississippi. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Apr 16, 2022, 11:39 AM CDT (16:39 UTC)
Expired: Apr 16, 2022, 2:15 PM CDT
In force: 3 hr
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch possible
Chance of a watch: 60%

All 31 counties

Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Greene County, MS, Hinds County, MS, Holmes County, MS, Issaquena County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Neshoba County, MS, Newton County, MS, Perry County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Warren County, MS, Wayne County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 29 km from the middle of the area, began a volume at 16:38 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 nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 4.7 hours before the alert went out and 39 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: 1095 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 531 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 230 m²/s²
0-3 km storm-relative helicity: 230 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.6

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
Apr 15, 9:26 PM CDT	Mesoscale Discussion	SPC	Alcorn, Benton, DeSoto, Lafayette, Marshall, Panola and 5 more	2 hr
Apr 15, 10:02 PM CDT	Severe Thunderstorm Watch	SPC	Alcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more	6 hr
Apr 16, 5:59 AM CDT	Mesoscale Discussion	SPC	Attala, Bolivar, Carroll, Choctaw, Grenada, Hinds and 16 more	2 hr
Apr 16, 4:33 PM CDT	Mesoscale Discussion	SPC	Adams, Amite, Claiborne, Copiah, Covington, Forrest and 21 more	2 hr

Nearby

Mesoscale Discussions in Mississippi, 2022 Every mesoscale discussion in 2022

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.