Alert archive / Alabama / Mesoscale Discussions in 2004

Mesoscale Discussion 320

April 10, 20048 counties in Alabama; Kemper County, Noxubee County, Winston County, Mississippi

The Storm Prediction Center issued this mesoscale discussion at Apr 10, 2004, 4:56 PM CDT for 8 counties in Alabama; Kemper County, Noxubee County, Winston County, Mississippi. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 10, 2004, 4:56 PM CDT (21:56 UTC)
Expired: Apr 10, 2004, 7:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Bibb County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Perry County, AL, Pickens County, AL, Sumter County, AL, Tuscaloosa County, AL, Kemper County, MS, Noxubee County, MS, Winston County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.9 hours before the alert went out and 203 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: 118 J/kg
Mixed-layer CIN: -169 J/kg
Mixed-layer LCL: 1157 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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
Apr 10, 3:25 PM CDT	Severe Thunderstorm Watch	SPC	Adams	6 hr

Nearby

Mesoscale Discussions in Alabama, 2004 Mesoscale Discussions in Mississippi, 2004 Every mesoscale discussion in 2004

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.