Alert archive / Georgia / Mesoscale Discussions in 2003

Mesoscale Discussion 1055

May 18, 200325 counties in Alabama; 11 counties in Florida; 51 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at May 18, 2003, 10:18 AM CDT for 25 counties in Alabama; 11 counties in Florida; 51 counties in Georgia. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
May 18, 2003, 10:18 AM CDT (15:18 UTC)
Expired
May 18, 2003, 11:45 AM CDT
In force
87 min
Issued by
the Storm Prediction Center
All 87 counties

Baldwin County, AL, Barbour County, AL, Bullock County, AL, Butler County, AL, Chambers County, AL, Clay County, AL, Cleburne County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Elmore County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Tallapoosa County, AL, Calhoun County, FL, Escambia County, FL, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Leon County, FL, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Bibb County, GA, Butts County, GA, Calhoun County, GA, Carroll County, GA, Chattahoochee County, GA, Clay County, GA, Clayton County, GA, Coweta County, GA, Crawford County, GA, Crisp County, GA, Decatur County, GA, Dooly County, GA, Dougherty County, GA, Douglas County, GA, Early County, GA, Fayette County, GA, Grady County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Houston County, GA, Jasper County, GA, Lamar County, GA, Lee County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Miller County, GA, Mitchell County, GA, Monroe County, GA, Muscogee County, GA, Newton County, GA, Peach County, GA, Pike County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Seminole County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Terrell County, GA, Thomas County, GA, Troup County, GA, Upson County, GA, Webster County, GA, Worth County, GA

The watches that followed

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

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 3.3 hours before the alert went out and 190 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-pSkew-T log-p diagram, Tallahassee Rgnl, FL at 12:00Z on 2003-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1121 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 12:00Z on 2003-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1121 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
868 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.4

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.

IssuedProductOfficeCountiesLasted
May 17, 7:16 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Blount, Chilton, Choctaw, Clarke and 15 more119 min
May 18, 5:52 AM CDTMesoscale DiscussionSPCBaldwin, Bullock, Butler, Clarke, Coffee, Conecuh and 12 more53 min
May 18, 11:00 AM CDTTornado WatchSPCBarbour, Bullock, Chambers, Cleburne, Coffee, Covington and 13 more5 hr
May 18, 1:10 PM CDTMesoscale DiscussionSPCDale, Geneva, Henry, Houston, Russell95 min
May 18, 12:16 PM CDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Clay, Columbia, Gilchrist and 8 more119 min
May 18, 12:40 PM CDTSevere Thunderstorm WatchSPCAlachua, Baker, Bradford, Clay, Columbia, Dixie and 17 more6 hr
May 18, 5:22 PM CDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Clay, Columbia, Dixie and 15 more83 min
May 18, 12:10 PM CDTTornado WatchSPCBryan, Bulloch, Burke, Candler, Chatham, Effingham and 17 more6 hr
May 18, 4:57 PM CDTMesoscale DiscussionSPCBurke, Candler, Columbia, Emanuel, Jefferson, Jenkins and 6 more63 min

Nearby

Mesoscale Discussions in Georgia, 2003Mesoscale Discussions in Alabama, 2003Mesoscale Discussions in Florida, 2003Every 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.