Alert archive / Mississippi / Mesoscale Discussions in 2016

Mesoscale Discussion 128

February 23, 20166 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Feb 23, 2016, 3:30 PM CST for 6 counties in Mississippi. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Feb 23, 2016, 3:30 PM CST (21:30 UTC)
Expired: Feb 23, 2016, 5:00 PM CST
In force: 90 min
Issued by: the Storm Prediction Center

Counties Claiborne County, MS, Copiah County, MS, Hinds County, MS, Madison County, MS, Rankin County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 41 km from the middle of the area, began a volume at 21:32 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, 9.5 hours before the alert went out and 34 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: 8 J/kg
Mixed-layer CIN: -131 J/kg
Mixed-layer LCL: 540 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 148 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
Feb 23, 10:44 AM CST	Mesoscale Discussion	SPC	Hancock	91 min
Feb 23, 11:08 AM CST	Tornado Watch	SPC	Amite, Hancock, Harrison, Jackson, Pearl River, Pike and 2 more	7 hr
Feb 23, 12:25 PM CST	Mesoscale Discussion	SPC	Hancock	65 min
Feb 23, 1:15 PM CST	Mesoscale Discussion	SPC	Amite, Clarke, Copiah, Covington, Forrest, Franklin and 25 more	2 hr
Feb 23, 2:13 PM CST	Tornado Watch PDS	SPC	Clarke, Covington, Forrest, George, Greene, Hancock and 12 more	8 hr
Feb 23, 2:20 PM CST	Tornado Watch	SPC	Adams, Attala, Carroll, Choctaw, Claiborne, Clay and 26 more	6 hr
Feb 23, 3:08 PM CST	Mesoscale Discussion	SPC	Hancock, Harrison	97 min
Feb 23, 5:18 PM CST	Mesoscale Discussion	SPC	Forrest, George, Greene, Hancock, Harrison, Jackson and 4 more	117 min

Nearby

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.