Alert archive / Mississippi / Mesoscale Discussions in 2005

Mesoscale Discussion 944

May 20, 20054 states

The Storm Prediction Center issued this mesoscale discussion at May 20, 2005, 10:37 PM CDT for 4 states. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: May 20, 2005, 10:37 PM CDT (03:37 UTC)
Expired: May 21, 2005, 12:00 AM CDT
In force: 83 min
Issued by: the Storm Prediction Center

All 53 counties

Butler County, AL, Choctaw County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Monroe County, AL, Washington County, AL, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Madison County, FL, Baker County, GA, Berrien County, GA, Brooks County, GA, Calhoun County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Early County, GA, Grady County, GA, Lanier County, GA, Lowndes County, GA, Miller County, GA, Mitchell County, GA, Seminole County, GA, Thomas County, GA, Tift County, GA, Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Franklin County, MS, Greene County, MS, Hinds County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Lawrence County, MS, Lincoln County, MS, Perry County, MS, Simpson County, MS, Smith County, MS, Wayne County, MS

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 3.6 hours before the alert went out and 145 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: 482 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 1639 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 54 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
May 20, 7:15 PM CDT	Severe Thunderstorm Watch	SPC	Baldwin, Escambia, Mobile, Washington	6 hr
May 20, 8:40 PM CDT	Mesoscale Discussion	SPC	Claiborne, Copiah, Covington, Franklin, Hinds, Issaquena and 10 more	95 min

Nearby

Mesoscale Discussions in Mississippi, 2005 Mesoscale Discussions in Georgia, 2005 Mesoscale Discussions in Alabama, 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.