Alert archive / Mississippi / Mesoscale Discussions in 2005

Mesoscale Discussion 216

February 23, 2005Chicot County, Arkansas; East Carroll Parish, West Carroll Parish, Louisiana; 22 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Feb 23, 2005, 12:13 PM CST for Chicot County, Arkansas; East Carroll Parish, West Carroll Parish, Louisiana; 22 counties in Mississippi. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Feb 23, 2005, 12:13 PM CST (18:13 UTC)
Expired: Feb 23, 2005, 2:15 PM CST
In force: 2 hr
Issued by: the Storm Prediction Center

All 25 counties

Chicot County, AR, East Carroll Parish, LA, West Carroll Parish, LA, Attala County, MS, Carroll County, MS, Choctaw County, MS, Clay County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Leake County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Noxubee County, MS, Oktibbeha County, MS, Sharkey County, MS, Sunflower County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 105 km from the middle of the area, began a volume at 18:15 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 nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 6.2 hours before the alert went out and 101 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: 201 J/kg
Mixed-layer CIN: -185 J/kg
Mixed-layer LCL: 597 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 23, 1:41 AM CST	Mesoscale Discussion	SPC	Crawford, Franklin, Garland, Howard, Johnson, Little River and 8 more	2 hr
Feb 23, 7:50 AM CST	Mesoscale Discussion	SPC	Beauregard, De Soto, Grant, Natchitoches, Rapides, Red River and 2 more	115 min
Feb 23, 10:35 AM CST	Mesoscale Discussion	SPC	Acadia, Allen, Ascension, Avoyelles, Beauregard, Bienville and 37 more	115 min
Feb 23, 11:45 AM CST	Severe Thunderstorm Watch	SPC	Allen, Avoyelles, Caldwell, Catahoula, Concordia, East Baton Rouge and 15 more	6 hr
Feb 23, 3:08 PM CST	Mesoscale Discussion	SPC	Acadia, Ascension, Cameron, East Baton Rouge, East Feliciana, Iberville and 14 more	2 hr

Nearby

Mesoscale Discussions in Mississippi, 2005 Mesoscale Discussions in Louisiana, 2005 Mesoscale Discussions in Arkansas, 2005 Every mesoscale discussion in 2005

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.