Alert archive / Georgia / Mesoscale Discussions in 2017
Mesoscale Discussion 918
The Storm Prediction Center issued this mesoscale discussion at May 29, 2017, 7:30 PM EDT for 58 counties in Georgia; Cabarrus County, Mecklenburg County, Union County, North Carolina; 22 counties in South Carolina. It was in force for 60 min.
The area
The outline as issued.
The facts
- Issued
- May 29, 2017, 7:30 PM EDT (23:30 UTC)
- Expired
- May 29, 2017, 8:30 PM EDT
- In force
- 60 min
- Issued by
- the Storm Prediction Center
All 83 counties
Baldwin County, GA, Banks County, GA, Barrow County, GA, Bibb County, GA, Burke County, GA, Butts County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Columbia County, GA, Crawford County, GA, DeKalb County, GA, Elbert County, GA, Fayette County, GA, Forsyth County, GA, Franklin County, GA, Fulton County, GA, Glascock County, GA, Greene County, GA, Gwinnett County, GA, Hall County, GA, Hancock County, GA, Hart County, GA, Henry County, GA, Houston County, GA, Jackson County, GA, Jasper County, GA, Jefferson County, GA, Jones County, GA, Lamar County, GA, Lincoln County, GA, Macon County, GA, Madison County, GA, Marion County, GA, McDuffie County, GA, Meriwether County, GA, Monroe County, GA, Morgan County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Peach County, GA, Pike County, GA, Putnam County, GA, Richmond County, GA, Rockdale County, GA, Schley County, GA, Spalding County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Twiggs County, GA, Upson County, GA, Walton County, GA, Warren County, GA, Washington County, GA, Wilkes County, GA, Wilkinson County, GA, Cabarrus County, NC, Mecklenburg County, NC, Union County, NC, Abbeville County, SC, Aiken County, SC, Anderson County, SC, Barnwell County, SC, Calhoun County, SC, Cherokee County, SC, Chester County, SC, Edgefield County, SC, Fairfield County, SC, Greenwood County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Union County, SC, York County, SC
The radar
The Greer radar (KGSP), 135 km from the middle of the area, began a volume at 23:30 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, 11.5 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.
- Mixed-layer CAPE
- 27 J/kg
- Mixed-layer CIN
- -236 J/kg
- Mixed-layer LCL
- 1043 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -82 m²/s²
- 0-3 km storm-relative helicity
- -88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
194 ACUS11 KWNS 292331 SWOMCD SPC MCD 292330 SCZ000-NCZ000-GAZ000-300030- Mesoscale Discussion 0918 NWS Storm Prediction Center Norman OK 0630 PM CDT Mon May 29 2017 Areas affected...Eastern GA...SC Concerning...Severe Thunderstorm Watch 298... Valid 292330Z - 300030Z The severe weather threat for Severe Thunderstorm Watch 298 continues. SUMMARY...Scattered severe thunderstorms will be concentrated primarily over the eastern half of WW298. DISCUSSION...An apparent weak short-wave trough has shifted to near the GA/SC border. Deep convection is concentrated ahead of this feature with several severe storms located from Columbia County GA east into Richland County SC. This activity is moving east at roughly 35kt and the more robust convection is likely producing large hail and locally damaging winds. Greatest corridor of strong convection should extend along an axis from near AGS to FLo over the next few hours. If it appears thunderstorms will maintain their intensity/organization there may be a need for a WW downstream into portions of ILM CWA. ..Darrow.. 05/29/2017 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...RAH...CHS...CAE...GSP...FFC... LAT...LON 34108468 35498042 33488044 32078467 34108468
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 2:27 PM EDT | Mesoscale Discussion | SPC | Baldwin, Barrow, Bibb, Burke, Butts, Clarke and 53 more | 3 hr |
| May 29, 3:15 PM EDT | Severe Thunderstorm Watch | SPC | Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 66 more | 7 hr |
| May 29, 4:59 PM EDT | Mesoscale Discussion | SPC | Baldwin, Banks, Barrow, Bibb, Bleckley, Burke and 56 more | 2 hr |
| May 28, 8:20 PM EDT | Mesoscale Discussion | SPC | Bladen, Brunswick, Columbus, New Hanover, Pender | 85 min |
Nearby
Mesoscale Discussions in Georgia, 2017Mesoscale Discussions in South Carolina, 2017Mesoscale Discussions in North Carolina, 2017Every mesoscale discussion in 2017
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.