Alert archive / Georgia / Mesoscale Discussions in 2012
Mesoscale Discussion 437
The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2012, 4:42 PM CDT for Lee County, Russell County, Alabama; 46 counties in Georgia. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Apr 3, 2012, 4:42 PM CDT (21:42 UTC)
- Expired
- Apr 3, 2012, 5:45 PM CDT
- In force
- 63 min
- Issued by
- the Storm Prediction Center
All 48 counties
Lee County, AL, Russell County, AL, Atkinson County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Bleckley County, GA, Brooks County, GA, Calhoun County, GA, Chattahoochee County, GA, Clay County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crawford County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Grady County, GA, Harris County, GA, Houston County, GA, Irwin County, GA, Lanier County, GA, Lee County, GA, Lowndes County, GA, Macon County, GA, Marion County, GA, Mitchell County, GA, Muscogee County, GA, Peach County, GA, Pulaski County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Turner County, GA, Upson County, GA, Webster County, GA, Wilcox County, GA, Worth County, GA
The radar
The Robins AFB radar (KJGX), 118 km from the middle of the area, began a volume at 21:45 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
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 9.7 hours before the alert went out and 157 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
- 984 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 995 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
110
ACUS11 KWNS 032143
SWOMCD
SPC MCD 032142
GAZ000-ALZ000-032245-
MESOSCALE DISCUSSION 0437
NWS STORM PREDICTION CENTER NORMAN OK
0442 PM CDT TUE APR 03 2012
AREAS AFFECTED...SRN GA...E-CNTRL AL
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 032142Z - 032245Z
ISOLATED LARGE HAIL/DMGG WINDS MAY ACCOMPANY TSTMS DEVELOPING OVER
PORTIONS OF SWRN GA AND SERN AL. A WW IS NOT CURRENTLY ANTICIPATED.
WATER VAPOR/SATELLITE LOOPS SHOW A CLEARLY DEFINED MCV TRANSLATING
ENEWD ACROSS THE FL PANHANDLE TOWARDS SWRN GA. CONVECTION HAS BECOME
MORE WIDESPREAD WITHIN THE LAST 1-2 HRS AS ASCENT ASSOCIATED WITH
THE MCV ENCOUNTERS A DEEPLY-MIXED AND UNSTABLE AIR MASS /MLCAPE
VALUES RANGING FROM 1500-2000 J/KG PER RUC OBJECTIVE ANALYSIS/. WEAK
DEEP-LAYER FLOW AND EFFECTIVE SHEAR WILL BE THE PRIMARY LIMITING
FACTOR PRECLUDING A MORE WIDESPREAD AND SIGNIFICANT SVR
THREAT...WITH PULSE TO LOOSELY ORGANIZED MULTICELL CLUSTERS THE
PREDOMINANT MODE. HOWEVER...LARGE SFC T-TD SPREADS AND STEEP
LOW-LEVEL LAPSE RATES WILL BE FAVORABLE FOR EVAPORATIVELY COOLED
DOWNDRAFTS CAPABLE OF PRODUCING ISOLATED DMGG WIND GUSTS. A BRIEF
THREAT FOR LARGE HAIL MAY ALSO ACCOMPANY THE STRONGEST UPDRAFTS.
..ROGERS.. 04/03/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...JAX...FFC...TAE...BMX...
LAT...LON 30898303 30688351 30758424 31648520 32378560 32838536
33048495 32808371 32298307 31558276 30898303Nearby
Mesoscale Discussions in Georgia, 2012Mesoscale Discussions in Alabama, 2012Every mesoscale discussion in 2012
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.