Alert archive / Georgia / Mesoscale Discussions in 2011
Mesoscale Discussion 693
The Storm Prediction Center issued this mesoscale discussion at May 3, 2011, 4:57 PM EDT for 51 counties in Georgia; 9 counties in North Carolina; 13 counties in South Carolina. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- May 3, 2011, 4:57 PM EDT (20:57 UTC)
- Expired
- May 3, 2011, 6:30 PM EDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
All 73 counties
Baldwin County, GA, Bibb County, GA, Bleckley County, GA, Burke County, GA, Butts County, GA, Clarke County, GA, Columbia County, GA, Crawford County, GA, Dodge County, GA, Dooly County, GA, Elbert County, GA, Emanuel County, GA, Franklin County, GA, Glascock County, GA, Greene County, GA, Hancock County, GA, Hart County, GA, Houston County, GA, Jasper County, GA, Jefferson County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Laurens County, GA, Lincoln County, GA, Macon County, GA, Madison County, GA, McDuffie County, GA, Monroe County, GA, Montgomery County, GA, Morgan County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Peach County, GA, Pulaski County, GA, Putnam County, GA, Richmond County, GA, Schley County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Treutlen County, GA, Twiggs County, GA, Upson County, GA, Walton County, GA, Warren County, GA, Washington County, GA, Wheeler County, GA, Wilkes County, GA, Wilkinson County, GA, Burke County, NC, Catawba County, NC, Cleveland County, NC, Gaston County, NC, Henderson County, NC, Lincoln County, NC, McDowell County, NC, Polk County, NC, Rutherford County, NC, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Edgefield County, SC, Greenville County, SC, Greenwood County, SC, Laurens County, SC, McCormick County, SC, Newberry County, SC, Pickens County, SC, Saluda County, SC, Spartanburg County, SC, Union County, SC
The radar
The Greer radar (KGSP), 97 km from the middle of the area, began a volume at 21:00 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, 9.0 hours before the alert went out and 185 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.
- Mixed-layer CAPE
- 4 J/kg
- Mixed-layer CIN
- -259 J/kg
- Mixed-layer LCL
- 931 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 161 m²/s²
- 0-3 km storm-relative helicity
- 205 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
933 ACUS11 KWNS 032057 SWOMCD SPC MCD 032057 NCZ000-SCZ000-GAZ000-032230- MESOSCALE DISCUSSION 0693 NWS STORM PREDICTION CENTER NORMAN OK 0357 PM CDT TUE MAY 03 2011 AREAS AFFECTED...GA AND THE WESTERN/UPSTATE CAROLINAS CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY VALID 032057Z - 032230Z STORMS MAY POSE AN ISOLATED SEVERE THREAT LATE THIS AFTERNOON/EARLY EVENING...WITH SOME RISK FOR DAMAGING WINDS/HAIL. WITH EXPECTATIONS FOR ANY SEVERE THREAT TO REMAIN MARGINAL/ISOLATED...A WATCH IS NOT CURRENTLY ANTICIPATED. SCATTERED TSTMS CONTINUE TO DEVELOP/STEADILY ADVANCE NORTHEASTWARD ALONG A COLD FRONT FROM NEAR THE SPINE OF THE SOUTHERN APPALACHIANS SOUTHWESTWARD INTO WEST-CENTRAL GA. THIS AIRMASS AHEAD OF THE FRONT HAS STRONGLY HEATED /80S F/ THIS AFTERNOON AMID SCATTERED CLOUD COVER...WITH SBCAPES ESTIMATED TO BE AS HIGH AS 1000-1500 J/KG JUST AHEAD OF THE FRONT. IT IS POSSIBLE THAT SOME OF THE STRONGER MULTICELLULAR STORMS MAY POSE AN ISOLATED DAMAGING WIND AND/OR HAIL THREAT AMIDST NEARLY UNIDIRECTIONAL SOUTHWESTERLY LOW/MID TROPOSPHERIC WINDS. HOWEVER...WITH THE STRONGEST VERTICAL SHEAR LAGGING /WESTWARD/ THE FRONT...AND GIVEN MODEST NEAR-FRONTAL CONVERGENCE/WEAK LAPSE RATES ALOFT...ONLY A MARGINAL/ISOLATED-TYPE SEVERE THREAT IS EXPECTED. ..GUYER.. 05/03/2011 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...CHS...CAE...GSP...FFC... LAT...LON 35918209 35888087 32068236 32068424 32828460 35918209
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 7:22 PM EDT | Mesoscale Discussion | SPC | Elbert, Lincoln, Wilkes | 83 min |
Nearby
Mesoscale Discussions in Georgia, 2011Mesoscale Discussions in South Carolina, 2011Mesoscale Discussions in North Carolina, 2011Every mesoscale discussion in 2011
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.