Alert archive / Georgia / Mesoscale Discussions in 2003

Mesoscale Discussion 1057

May 18, 20035 counties in Alabama; 9 counties in Florida; 56 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at May 18, 2003, 1:10 PM CDT for 5 counties in Alabama; 9 counties in Florida; 56 counties in Georgia. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued
May 18, 2003, 1:10 PM CDT (18:10 UTC)
Expired
May 18, 2003, 2:45 PM CDT
In force
95 min
Issued by
the Storm Prediction Center
All 70 counties

Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Russell County, AL, Bay County, FL, Calhoun County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Liberty County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Baldwin County, GA, Bibb County, GA, Bleckley 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, Harris County, GA, Heard County, GA, Henry County, GA, Houston County, GA, Jasper County, GA, Jones 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, Peach County, GA, Pike County, GA, Pulaski 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, Troup County, GA, Turner County, GA, Twiggs County, GA, Upson County, GA, Webster County, GA, Wilcox County, GA, Wilkinson County, GA, Worth County, GA

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 6.2 hours before the alert went out and 151 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, 10:18 AM CDTMesoscale DiscussionSPCBaldwin, Barbour, Bullock, Butler, Chambers, Clay and 19 more87 min
May 18, 11:00 AM CDTTornado WatchSPCBarbour, Bullock, Chambers, Cleburne, Coffee, Covington and 13 more5 hr
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 Florida, 2003Mesoscale Discussions in Alabama, 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.