Alert archive / Mississippi / Mesoscale Discussions in 2008

Mesoscale Discussion 302

February 26, 200818 counties in Alabama; 7 parishes in Louisiana; 33 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Feb 26, 2008, 2:50 AM CST for 18 counties in Alabama; 7 parishes in Louisiana; 33 counties in Mississippi. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: Feb 26, 2008, 2:50 AM CST (08:50 UTC)
Expired: Feb 26, 2008, 4:15 AM CST
In force: 85 min
Issued by: the Storm Prediction Center

All 58 counties

Autauga County, AL, Bibb County, AL, Chilton County, AL, Choctaw County, AL, Dallas County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Lowndes County, AL, Marengo County, AL, Perry County, AL, Pickens County, AL, Shelby County, AL, Sumter County, AL, Tuscaloosa County, AL, Walker County, AL, Catahoula Parish, LA, Concordia Parish, LA, Franklin Parish, LA, Grant Parish, LA, LaSalle Parish, LA, Madison Parish, LA, Tensas Parish, LA, Adams County, MS, Attala County, MS, Choctaw County, MS, Claiborne County, MS, Clarke County, MS, Clay County, MS, Copiah County, MS, Covington County, MS, Franklin County, MS, Hinds County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Lowndes County, MS, Madison County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Warren County, MS, Wayne County, MS, Webster County, MS, Winston County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 93 km from the middle of the area, began a volume at 08:51 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 78Feb 26, 5:15 AM CST

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 8.8 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1551 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 207 m²/s²
0-3 km storm-relative helicity: 359 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 25, 11:20 PM CST	Mesoscale Discussion	SPC	Bibb, Choctaw, Clarke, Fayette, Greene, Hale and 7 more	85 min
Feb 26, 12:10 AM CST	Severe Thunderstorm Watch	SPC	Autauga, Bibb, Chilton, Choctaw, Dallas, Fayette and 12 more	7 hr
Feb 26, 4:41 AM CST	Severe Thunderstorm Watch	SPC	Barbour, Bullock, Chambers, Clay, Cleburne, Coosa and 8 more	7 hr
Feb 26, 5:12 AM CST	Severe Thunderstorm Watch	SPC	Baldwin, Butler, Clarke, Conecuh, Covington, Crenshaw and 5 more	4 hr
Feb 26, 6:50 AM CST	Mesoscale Discussion	SPC	Barbour, Coffee, Covington, Dale, Geneva, Henry and 1 more	85 min
Feb 26, 7:39 AM CST	Severe Thunderstorm Watch	SPC	Coffee, Dale, Geneva, Henry, Houston	6 hr
Feb 26, 9:22 AM CST	Mesoscale Discussion	SPC	Houston	83 min
Feb 26, 9:35 AM CST	Mesoscale Discussion	SPC	Houston	85 min
Feb 25, 7:20 PM CST	Severe Thunderstorm Watch	SPC	Bienville, Bossier, Caddo, Claiborne, De Soto, East Carroll and 9 more	7 hr
Feb 25, 9:22 PM CST	Mesoscale Discussion	SPC	Bienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 15 more	83 min

Nearby

Mesoscale Discussions in Mississippi, 2008 Mesoscale Discussions in Alabama, 2008 Mesoscale Discussions in Louisiana, 2008 Every mesoscale discussion in 2008

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.