Alert archive / Mississippi / Mesoscale Discussions in 2019

Mesoscale Discussion 2213

December 16, 20197 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Dec 16, 2019, 4:32 PM CST for 7 counties in Mississippi. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Dec 16, 2019, 4:32 PM CST (22:32 UTC)
Expired: Dec 16, 2019, 6:00 PM CST
In force: 88 min
Issued by: the Storm Prediction Center

Counties Covington County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Lawrence County, MS, Marion County, MS, Smith County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 79 km from the middle of the area, began a volume at 22:34 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, 10.5 hours before the alert went out and 88 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: 268 J/kg
Mixed-layer CIN: -205 J/kg
Mixed-layer LCL: 760 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 220 m²/s²
0-3 km storm-relative helicity: 246 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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
Dec 16, 9:43 AM CST	Mesoscale Discussion	SPC	Adams, Claiborne, Copiah, Franklin, Hinds, Humphreys and 9 more	3 hr
Dec 16, 10:02 AM CST	Mesoscale Discussion	SPC	Coahoma, DeSoto, Quitman, Tate, Tunica	118 min
Dec 16, 10:40 AM CST	Tornado Watch	SPC	Adams, Amite, Attala, Bolivar, Carroll, Claiborne and 23 more	9 hr
Dec 16, 1:16 PM CST	Mesoscale Discussion	SPC	Adams, Amite, Claiborne, Copiah, Franklin, Jefferson and 2 more	89 min
Dec 16, 1:52 PM CST	Mesoscale Discussion	SPC	Alcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 22 more	83 min
Dec 16, 2:22 PM CST	Tornado Watch	SPC	Alcorn, Calhoun, Chickasaw, Choctaw, Clarke, Clay and 30 more	8 hr
Dec 16, 3:08 PM CST	Mesoscale Discussion	SPC	Amite, Copiah, Franklin, Jefferson Davis, Lawrence, Lincoln and 3 more	67 min
Dec 16, 3:10 PM CST	Mesoscale Discussion	SPC	Alcorn, Attala, Calhoun, Chickasaw, Choctaw, Clay and 16 more	65 min
Dec 16, 3:47 PM CST	Tornado Watch	SPC	Greene, Perry, Wayne	10 hr
Dec 16, 4:45 PM CST	Mesoscale Discussion	SPC	Itawamba, Monroe, Tishomingo	60 min

Nearby

Mesoscale Discussions in Mississippi, 2019 Every mesoscale discussion in 2019

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.