Alert archive / Georgia / Mesoscale Discussions in 2014

Mesoscale Discussion 144

February 21, 201411 counties in Florida; 67 counties in Georgia; 26 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Feb 21, 2014, 12:43 PM EST for 11 counties in Florida; 67 counties in Georgia; 26 counties in South Carolina. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued
Feb 21, 2014, 12:43 PM EST (17:43 UTC)
Expired
Feb 21, 2014, 1:45 PM EST
In force
62 min
Issued by
the Storm Prediction Center
All 104 counties

Baker County, FL, Columbia County, FL, Hamilton County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Madison County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Wakulla County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baldwin County, GA, Ben Hill County, GA, Berrien County, GA, Bleckley County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Candler County, GA, Charlton County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Columbia County, GA, Cook County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Echols County, GA, Effingham County, GA, Elbert County, GA, Emanuel County, GA, Evans County, GA, Glascock County, GA, Grady County, GA, Hancock County, GA, Houston County, GA, Irwin County, GA, Jeff Davis County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Lanier County, GA, Laurens County, GA, Liberty County, GA, Lincoln County, GA, Long County, GA, Lowndes County, GA, McDuffie County, GA, Mitchell County, GA, Montgomery County, GA, Pierce County, GA, Pulaski County, GA, Richmond County, GA, Screven County, GA, Taliaferro County, GA, Tattnall County, GA, Telfair County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Twiggs County, GA, Ware County, GA, Warren County, GA, Washington County, GA, Wayne County, GA, Wheeler County, GA, Wilcox County, GA, Wilkes County, GA, Wilkinson County, GA, Worth County, GA, Abbeville County, SC, Aiken County, SC, Allendale County, SC, Anderson County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Chester County, SC, Chesterfield County, SC, Edgefield County, SC, Fairfield County, SC, Greenwood County, SC, Hampton County, SC, Jasper County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, Union County, SC

The radar

The Moody AFB radar (KVAX), 102 km from the middle of the area, began a volume at 17:47 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 5.7 hours before the alert went out and 184 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, Jacksonville, FL at 12:00Z on 2014-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 968 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, Jacksonville, FL at 12:00Z on 2014-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 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
968 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
609 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
150 m²/s²
Significant tornado parameter
0.5
Supercell composite
4.3

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
Feb 21, 12:43 AM ESTMesoscale DiscussionSPCEscambia, Okaloosa, Santa Rosa62 min
Feb 21, 1:58 AM ESTSevere Thunderstorm WatchSPCBay, Calhoun, Escambia, Franklin, Gulf, Holmes and 6 more7 hr
Feb 21, 4:33 AM ESTMesoscale DiscussionSPCHolmes, Jackson, Okaloosa, Santa Rosa, Walton87 min
Feb 21, 6:39 AM ESTSevere Thunderstorm WatchSPCAlachua, Baker, Bradford, Clay, Columbia, Dixie and 17 more9 hr
Feb 21, 8:17 AM ESTMesoscale DiscussionSPCBaker, Columbia, Hamilton, Jefferson, Madison, Suwannee118 min
Feb 21, 10:13 AM ESTMesoscale DiscussionSPCAlachua, Baker, Bradford, Clay, Columbia, Dixie and 17 more92 min
Feb 20, 10:29 PM ESTMesoscale DiscussionSPCBartow, Catoosa, Chattooga, Dade, Dawson, Fannin and 10 more61 min
Feb 20, 10:47 PM ESTTornado WatchSPCBartow, Catoosa, Chattooga, Cherokee, Dade, Dawson and 16 more6 hr
Feb 21, 3:11 AM ESTMesoscale DiscussionSPCAnderson, Cherokee, Greenville, Pickens, Spartanburg94 min
Feb 21, 8:57 AM ESTMesoscale DiscussionSPCDillon, Horry, Marion, Marlboro63 min
Feb 21, 10:02 AM ESTTornado WatchSPCDarlington, Dillon, Florence, Georgetown, Horry, Marion and 2 more6 hr
Feb 21, 11:05 AM ESTMesoscale DiscussionSPCDillon, Marion55 min

Nearby

Mesoscale Discussions in Georgia, 2014Mesoscale Discussions in South Carolina, 2014Mesoscale Discussions in Florida, 2014Every mesoscale discussion in 2014

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; radar from the NEXRAD Level II archive.