Alert archive / Georgia / Mesoscale Discussions in 2005

Mesoscale Discussion 941

May 20, 20054 states

The Storm Prediction Center issued this mesoscale discussion at May 20, 2005, 6:44 PM CDT for 4 states. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued
May 20, 2005, 6:44 PM CDT (23:44 UTC)
Expired
May 20, 2005, 8:15 PM CDT
In force
91 min
Issued by
the Storm Prediction Center
All 139 counties

Autauga County, AL, Baldwin County, AL, Barbour County, AL, Bibb County, AL, Bullock County, AL, Butler County, AL, Chambers County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Clay County, AL, Coffee County, AL, Conecuh County, AL, Coosa County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Dallas County, AL, Elmore County, AL, Escambia County, AL, Geneva County, AL, Greene County, AL, Hale County, AL, Henry County, AL, Houston County, AL, Jefferson County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pickens County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Washington County, AL, Wilcox County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Okaloosa County, FL, Santa Rosa County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Bleckley County, GA, Brooks County, GA, Calhoun County, GA, Chattahoochee County, GA, Clay County, GA, Colquitt County, GA, Cook County, GA, Crawford County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Harris County, GA, Heard County, GA, Houston County, GA, Irwin County, GA, Lanier County, GA, Laurens County, GA, Lee County, GA, Lowndes County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Miller County, GA, Mitchell County, GA, Montgomery County, GA, Muscogee County, GA, Peach County, GA, Pulaski County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Seminole County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Treutlen County, GA, Troup County, GA, Turner County, GA, Twiggs County, GA, Upson County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Worth County, GA, Choctaw County, MS, Clarke County, MS, Clay County, MS, Forrest County, MS, George County, MS, Greene County, MS, Jackson County, MS, Jasper County, MS, Jones County, MS, Kemper County, MS, Lauderdale County, MS, Lowndes County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Perry County, MS, Stone County, MS, Wayne County, MS, Webster County, MS, Winston County, MS

The watches that followed

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

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 11.7 hours before the alert went out and 155 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, Birmingham, AL at 12:00Z on 2005-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1086 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, Birmingham, AL at 12:00Z on 2005-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 147 square meters per square second.193958Sfc1 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
1086 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
1017 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
147 m²/s²
0-3 km storm-relative helicity
134 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.9

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 20, 4:18 AM CDTMesoscale DiscussionSPCJackson57 min
May 20, 7:42 AM CDTMesoscale DiscussionSPCDeKalb, Jackson, Limestone, Madison93 min
May 20, 8:40 AM CDTSevere Thunderstorm WatchSPCBlount, Calhoun, Chambers, Cherokee, Clay, Cleburne and 24 more7 hr
May 20, 12:55 PM CDTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Blount, Bullock, Butler and 52 more65 min
May 20, 3:10 PM CDTSevere Thunderstorm WatchSPCAutauga, Barbour, Bibb, Bullock, Butler, Chambers and 36 more8 hr
May 20, 1:00 AM CDTSevere Thunderstorm WatchSPCHart7 hr
May 20, 1:30 AM CDTSevere Thunderstorm WatchSPCBanks, Barrow, Catoosa, Cherokee, Dade, Dawson and 20 more8 hr
May 20, 4:52 AM CDTMesoscale DiscussionSPCBaldwin, Bleckley, Burke, Candler, Columbia, Emanuel and 18 more53 min
May 20, 12:16 PM CDTMesoscale DiscussionSPCBryan, Bulloch, Burke, Candler, Chatham, Effingham and 11 more29 min
May 20, 12:20 PM CDTSevere Thunderstorm WatchSPCAppling, Bacon, Bryan, Bulloch, Burke, Candler and 15 more7 hr
May 20, 1:43 PM CDTMesoscale DiscussionSPCAppling, Bacon, Bryan, Bulloch, Burke, Candler and 14 more62 min
May 20, 3:40 PM CDTMesoscale DiscussionSPCAppling, Bacon, Bryan, Bulloch, Candler, Chatham and 10 more95 min
May 20, 4:51 PM CDTMesoscale DiscussionSPCAttala, Bolivar, Carroll, Grenada, Hinds, Holmes and 14 more114 min
May 20, 5:30 PM CDTSevere Thunderstorm WatchSPCAdams, Attala, Carroll, Claiborne, Copiah, Covington and 19 more8 hr

Nearby

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