Alert archive / Mississippi / Mesoscale Discussions in 2008

Mesoscale Discussion 2007

August 2, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Aug 2, 2008, 10:57 PM CDT for 4 states. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Aug 2, 2008, 10:57 PM CDT (03:57 UTC)
Expired: Aug 3, 2008, 12:30 AM CDT
In force: 93 min
Issued by: the Storm Prediction Center

All 52 counties

Choctaw County, AL, Washington County, AL, Chicot County, AR, Desha County, AR, East Carroll Parish, LA, Madison Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Bolivar County, MS, Carroll County, MS, Claiborne County, MS, Clarke County, MS, Coahoma County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Greene County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lawrence County, MS, Leflore County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Montgomery County, MS, Panola County, MS, Perry County, MS, Pike County, MS, Quitman County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Walthall County, MS, Warren County, MS, Washington County, MS, Wayne County, MS, Yalobusha County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 77 km from the middle of the area, began a volume at 03:58 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 00:00Z, 4.0 hours before the alert went out and 76 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: 2703 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1723 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

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
Aug 2, 7:27 PM CDT	Mesoscale Discussion	SPC	Autauga, Barbour, Bibb, Bullock, Butler, Chambers and 32 more	2 hr
Aug 2, 7:52 PM CDT	Severe Thunderstorm Watch	SPC	Choctaw, Clarke, Monroe, Washington, Wilcox	6 hr
Aug 3, 3:09 PM CDT	Mesoscale Discussion	SPC	Phillips	66 min
Aug 3, 4:21 PM CDT	Mesoscale Discussion	SPC	Chicot	54 min
Aug 3, 1:17 AM CDT	Mesoscale Discussion	SPC	Avoyelles, Bienville, Caldwell, Catahoula, Grant, Jackson and 6 more	58 min
Aug 3, 10:50 AM CDT	Mesoscale Discussion	SPC	Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 21 more	55 min
Aug 3, 1:07 PM CDT	Severe Thunderstorm Watch	SPC	Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 24 more	7 hr
Aug 3, 6:44 PM CDT	Severe Thunderstorm Watch	SPC	Bienville, Bossier, Caddo, Claiborne, De Soto, Lincoln and 3 more	3 hr

Nearby

Mesoscale Discussions in Mississippi, 2008 Mesoscale Discussions in Louisiana, 2008 Mesoscale Discussions in Alabama, 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.