Alert archive / Georgia / Mesoscale Discussions in 2003

Mesoscale Discussion 247

March 13, 200311 counties in Florida; 12 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Mar 13, 2003, 7:48 PM CST for 11 counties in Florida; 12 counties in Georgia. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: Mar 13, 2003, 7:48 PM CST (01:48 UTC)
Expired: Mar 13, 2003, 8:45 PM CST
In force: 57 min
Issued by: the Storm Prediction Center

All 23 counties

Bay County, FL, Calhoun County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Wakulla County, FL, Washington County, FL, Berrien County, GA, Brooks County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Grady County, GA, Irwin County, GA, Miller County, GA, Mitchell County, GA, Seminole County, GA, Thomas County, GA, Tift County, GA

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 1.8 hours before the alert went out and 45 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: 1013 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 1625 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 38 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
Mar 14, 11:58 AM CST	Mesoscale Discussion	SPC	Bay, Calhoun, Escambia, Franklin, Gadsden, Gulf and 10 more	2 hr
Mar 14, 1:36 PM CST	Mesoscale Discussion	SPC	Glades, Hendry, Highlands, Okeechobee	114 min
Mar 14, 4:05 PM CST	Severe Thunderstorm Watch	SPC	Escambia, Holmes, Okaloosa, Santa Rosa, Walton	5 hr
Mar 14, 4:54 PM CST	Mesoscale Discussion	SPC	Broward, Glades, Hendry, Highlands, Okeechobee, Palm Beach	66 min

Nearby

Mesoscale Discussions in Georgia, 2003 Mesoscale Discussions in Florida, 2003 Every mesoscale discussion in 2003

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.