Alert archive / Georgia / Mesoscale Discussions in 2004

Mesoscale Discussion 2525

December 9, 20046 counties in Alabama; 7 counties in Florida; 19 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Dec 9, 2004, 10:24 AM CST for 6 counties in Alabama; 7 counties in Florida; 19 counties in Georgia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Dec 9, 2004, 10:24 AM CST (16:24 UTC)
Expired: Dec 9, 2004, 12:30 PM CST
In force: 2 hr
Issued by: the Storm Prediction Center

All 32 counties

Barbour County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Russell County, AL, Bay County, FL, Calhoun County, FL, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Liberty County, FL, Washington County, FL, Baker County, GA, Calhoun County, GA, Chattahoochee County, GA, Clay County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Lee County, GA, Marion County, GA, Miller County, GA, Muscogee County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Seminole County, GA, Stewart County, GA, Sumter County, GA, Terrell County, GA, Webster County, GA

The watches that followed

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

Severe Thunderstorm Watch 917Dec 9, 11:45 AM CST

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 4.4 hours before the alert went out and 287 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: 12 J/kg
Mixed-layer CIN: -160 J/kg
Mixed-layer LCL: 512 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 237 m²/s²
0-3 km storm-relative helicity: 307 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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
Dec 9, 4:22 AM CST	Mesoscale Discussion	SPC	Autauga, Baldwin, Chilton, Choctaw, Clarke, Conecuh and 10 more	83 min
Dec 9, 4:45 AM CST	Tornado Watch	SPC	Autauga, Bibb, Chilton, Choctaw, Clarke, Coosa and 14 more	5 hr
Dec 9, 6:04 AM CST	Mesoscale Discussion	SPC	Autauga, Bibb, Chilton, Choctaw, Clarke, Dallas and 10 more	86 min
Dec 9, 7:46 AM CST	Mesoscale Discussion	SPC	Autauga, Bibb, Chilton, Choctaw, Clarke, Coosa and 9 more	89 min
Dec 9, 11:45 AM CST	Severe Thunderstorm Watch	SPC	Jackson	5 hr

Nearby

Mesoscale Discussions in Georgia, 2004 Mesoscale Discussions in Florida, 2004 Mesoscale Discussions in Alabama, 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.