Alert archive / Georgia / Mesoscale Discussions in 2011
Mesoscale Discussion 372
The Storm Prediction Center issued this mesoscale discussion at Apr 8, 2011, 2:31 PM CDT for 18 counties in Alabama; 84 counties in Georgia. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- Apr 8, 2011, 2:31 PM CDT (19:31 UTC)
- Expired
- Apr 8, 2011, 4:30 PM CDT
- In force
- 119 min
- Issued by
- the Storm Prediction Center
All 102 counties
Autauga County, AL, Barbour County, AL, Bullock County, AL, Calhoun County, AL, Chambers County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Elmore County, AL, Lee County, AL, Macon County, AL, Montgomery County, AL, Randolph County, AL, Russell County, AL, Shelby County, AL, Talladega County, AL, Tallapoosa County, AL, Baldwin County, GA, Barrow County, GA, Bibb County, GA, Bleckley County, GA, Burke County, GA, Butts County, GA, Carroll County, GA, Chattahoochee County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Columbia County, GA, Coweta County, GA, Crawford County, GA, Crisp County, GA, DeKalb County, GA, Dodge County, GA, Dooly County, GA, Douglas County, GA, Elbert County, GA, Emanuel County, GA, Fayette County, GA, Forsyth County, GA, Fulton County, GA, Glascock County, GA, Greene County, GA, Gwinnett County, GA, Hall County, GA, Hancock County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Houston County, GA, Jackson County, GA, Jasper County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Laurens County, GA, Lee 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, Muscogee County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Peach County, GA, Pike County, GA, Polk County, GA, Pulaski County, GA, Putnam County, GA, Quitman County, GA, Randolph County, GA, Richmond County, GA, Rockdale County, GA, Schley County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Terrell County, GA, Treutlen County, GA, Troup County, GA, Twiggs County, GA, Upson County, GA, Walton County, GA, Warren County, GA, Washington County, GA, Webster County, GA, Wilcox County, GA, Wilkes County, GA, Wilkinson County, GA
The radar
The Atlanta radar (KFFC), 41 km from the middle of the area, began a volume at 19:33 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, 7.5 hours before the alert went out and 45 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
- 124 J/kg
- Mixed-layer CIN
- -331 J/kg
- Mixed-layer LCL
- 507 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 155 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
125
ACUS11 KWNS 081931
SWOMCD
SPC MCD 081931
GAZ000-SCZ000-ALZ000-082130-
MESOSCALE DISCUSSION 0372
NWS STORM PREDICTION CENTER NORMAN OK
0231 PM CDT FRI APR 08 2011
AREAS AFFECTED...PARTS OF E CNTRL AL INTO CNTRL GA
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 081931Z - 082130Z
SEVERE POTENTIAL REMAINS A BIT UNCERTAIN...AND IT STILL APPEARS
UNLIKELY THAT A WW WILL BE NEEDED...BUT TRENDS WILL BE MONITORED.
A LOW-LEVEL FOCUS FOR STORM DEVELOPMENT REMAINS UNCLEAR...AND
DISCREPANCIES EXIST AMONG THE MODELS CONCERNING CONVECTIVE POTENTIAL
ACROSS THE REGION LATE THIS AFTERNOON. HOWEVER...AN AREA OF
ENHANCED MID/UPPER FORCING FOR UPWARD VERTICAL MOTION DOES APPEAR TO
BE SPREADING ACROSS CENTRAL ALABAMA INTO CENTRAL GEORGIA. THIS IS
OCCURRING COINCIDENT WITH SIGNIFICANT BOUNDARY LAYER DESTABILIZATION
BENEATH THE NOSE OF A PLUME OF STEEP MID-LEVEL LAPSE RATES
ASSOCIATED WITH ELEVATED MIXED LAYER AIR EMANATING FROM THE PLAINS.
IT APPEARS POSSIBLE THAT LIFT MAY BECOME SUFFICIENT TO OVERCOME
REMAINING INHIBITION TO SUPPORT AT LEAST ISOLATED STORM DEVELOPMENT.
IF THIS OCCURS...MODERATE TO STRONG DEEP LAYER MEAN FLOW AND SHEAR
ALONG A 30-50 KT WESTERLY LOWER/MID TROPOSPHERIC JET WILL BE
SUPPORTIVE OF SUPERCELLS... AND PERHAPS UPSCALE CONVECTIVE GROWTH
INTO SMALL BUT ORGANIZED MESOSCALE CONVECTIVE SYSTEM...WHICH COULD
BE CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WIND GUSTS.
..KERR.. 04/08/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CHS...CAE...GSP...FFC...TAE...BMX...
LAT...LON 33148686 34058577 34338387 34108249 32868178 31828330
31688518 32388708 33148686Nearby
Mesoscale Discussions in Georgia, 2011Mesoscale Discussions in Alabama, 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.