Alert archive / Georgia / Mesoscale Discussions in 2019

Mesoscale Discussion 528

May 4, 201953 counties in Georgia; 11 counties in North Carolina; 20 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at May 4, 2019, 12:35 PM EDT for 53 counties in Georgia; 11 counties in North Carolina; 20 counties in South Carolina. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
May 4, 2019, 12:35 PM EDT (16:35 UTC)
Expired
May 4, 2019, 2:00 PM EDT
In force
85 min
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 84 counties

Baldwin County, GA, Banks County, GA, Barrow County, GA, Bibb County, GA, Butts County, GA, Cherokee County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Columbia County, GA, Crawford County, GA, Dawson County, GA, DeKalb County, GA, Elbert County, GA, Fayette County, GA, Forsyth County, GA, Franklin County, GA, Fulton County, GA, Gilmer County, GA, Glascock County, GA, Greene County, GA, Gwinnett County, GA, Habersham County, GA, Hall County, GA, Hancock County, GA, Hart County, GA, Henry County, GA, Jackson County, GA, Jasper County, GA, Jones County, GA, Lamar County, GA, Lincoln County, GA, Lumpkin County, GA, Madison County, GA, McDuffie County, GA, Monroe County, GA, Morgan County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Pickens County, GA, Putnam County, GA, Rabun County, GA, Rockdale County, GA, Spalding County, GA, Stephens County, GA, Taliaferro County, GA, Towns County, GA, Union County, GA, Walton County, GA, Warren County, GA, White County, GA, Wilkes County, GA, Buncombe County, NC, Clay County, NC, Cleveland County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, McDowell County, NC, Polk County, NC, Rutherford County, NC, Transylvania County, NC, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Edgefield County, SC, Fairfield County, SC, Greenville County, SC, Greenwood County, SC, Kershaw County, SC, Laurens County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Oconee County, SC, Pickens County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Union County, SC, York County, SC

The radar

The Greer radar (KGSP), 78 km from the middle of the area, began a volume at 16:35 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 4.6 hours before the alert went out and 192 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, Peachtre/Fal Fld, GA at 12:00Z on 2019-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 872 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, Peachtre/Fal Fld, GA at 12:00Z on 2019-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 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
872 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
968 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
57 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 4, 10:41 AM EDTMesoscale DiscussionSPCBartow, Catoosa, Cherokee, Cobb, Dawson, Fannin and 17 more94 min
May 4, 12:58 PM EDTMesoscale DiscussionSPCClay, Early, Quitman, Stewart, Troup77 min
May 4, 4:28 PM EDTMesoscale DiscussionSPCClay, Early, Miller, Quitman, Randolph, Seminole and 1 more92 min
May 4, 5:51 PM EDTMesoscale DiscussionSPCAlamance, Anson, Bladen, Cabarrus, Caswell, Chatham and 38 more84 min

Nearby

Mesoscale Discussions in Georgia, 2019Mesoscale Discussions in South Carolina, 2019Mesoscale Discussions in North Carolina, 2019Every mesoscale discussion in 2019

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.