Alert archive / Georgia / Mesoscale Discussions in 2012
Mesoscale Discussion 1049
The Storm Prediction Center issued this mesoscale discussion at Jun 4, 2012, 8:43 AM CDT for 11 counties in Alabama; Baker County, Florida; 79 counties in Georgia. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 4, 2012, 8:43 AM CDT (13:43 UTC)
- Expired
- Jun 4, 2012, 10:45 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 91 counties
Barbour County, AL, Bullock County, AL, Chambers County, AL, Elmore County, AL, Henry County, AL, Lee County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Russell County, AL, Tallapoosa County, AL, Baker County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Bibb County, GA, Bleckley County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Bulloch County, GA, Calhoun County, GA, Candler County, GA, Charlton County, GA, Chattahoochee County, GA, Clay County, GA, Clinch 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, Early County, GA, Echols County, GA, Emanuel County, GA, Evans County, GA, Harris County, GA, Houston County, GA, Irwin County, GA, Jeff Davis County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Lanier County, GA, Laurens County, GA, Lee County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Mitchell County, GA, Monroe County, GA, Montgomery County, GA, Muscogee County, GA, Peach County, GA, Pierce County, GA, Pike County, GA, Pulaski County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Tattnall County, GA, Taylor County, GA, Telfair County, GA, Terrell County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Troup County, GA, Turner County, GA, Twiggs County, GA, Upson County, GA, Ware County, GA, Wayne County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Wilkinson County, GA, Worth County, GA
The radar
The Robins AFB radar (KJGX), 96 km from the middle of the area, began a volume at 13:41 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 1.7 hours before the alert went out and 120 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
- 277 J/kg
- Mixed-layer CIN
- -87 J/kg
- Mixed-layer LCL
- 839 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 180 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
672
ACUS11 KWNS 041344
SWOMCD
SPC MCD 041343
GAZ000-FLZ000-ALZ000-041545-
MESOSCALE DISCUSSION 1049
NWS STORM PREDICTION CENTER NORMAN OK
0843 AM CDT MON JUN 04 2012
AREAS AFFECTED...CENTRAL AL/SOUTH-CENTRAL GA AND FAR NORTH FL
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 041343Z - 041545Z
PROBABILITY OF WATCH ISSUANCE...80 PERCENT
SUMMARY...IT SEEMS LIKELY THAT TSTMS WILL INTENSIFY BY LATE
MORNING/AFTERNOON ACROSS PORTIONS OF AL/GA AS AN MCS/ASSOCIATED
COMPOSITE OUTFLOW CONTINUES TO PROGRESS GENERALLY SOUTHEASTWARD AT
AROUND 35-40 KT. DAMAGING WINDS AND BOUTS OF SEVERE HAIL WILL BE
POSSIBLE.
DISCUSSION...AN MCS AND ASSOCIATED CONVECTIVE OUTFLOW/SURFACE COLD
POOL EXTENDS FROM NORTHERN MS EAST-SOUTHEASTWARD INTO NORTH-CENTRAL
AL AND WEST-CENTRAL/NORTHWEST GA AS OF 1330Z. UPDRAFT INTENSITY
ALONG THE OUTFLOW/EDGE OF THE MCS HAS REMAIN RELATIVELY STEADY STATE
OVER THE PAST 1-2 HOURS...BUT INCREASINGLY INTENSE SURFACE BASED
UPDRAFTS SEEM LIKELY AS SURFACE TEMPERATURES WARM THROUGH THE 80S F
IN THE AFTERNOON AMID AMPLE INSOLATION PER VISIBLE SATELLITE
IMAGERY. ALBEIT LARGELY ORIENTED PARALLEL TO THE CONVECTIVE
LINE...REGIONAL 12Z OBSERVED SOUNDINGS FROM
BIRMINGHAM/ATLANTA/TALLAHASSEE ARE INDICATIVE OF RELATIVELY STRONG
WEST-NORTHWESTERLY FLOW AROUND/ABOVE 4 KM...WHICH WILL LIKELY
CONTRIBUTE TO AN ORGANIZED SOUTHEASTWARD-MOVING LINEAR MODE WITH
DAMAGING WINDS/SOME SEVERE HAIL AS THE PRIMARY CONCERNS.
..GUYER/CARBIN.. 06/04/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CHS...JAX...FFC...TAE...BMX...MOB...
LAT...LON 32768652 33038522 33398442 32568168 31858118 30278222
31838646 32768652SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 3, 7:09 PM CDT | Tornado Watch | SPC | Colbert, Franklin, Lauderdale, Lawrence, Limestone, Morgan | 7 hr |
| Jun 3, 8:34 PM CDT | Mesoscale Discussion | SPC | Colbert, Lauderdale, Lawrence, Limestone | 56 min |
| Jun 3, 11:13 PM CDT | Mesoscale Discussion | SPC | Blount, Cherokee, Colbert, Cullman, DeKalb, Etowah and 10 more | 62 min |
| Jun 4, 3:14 AM CDT | Mesoscale Discussion | SPC | Colbert, Franklin | 91 min |
| Jun 4, 5:33 AM CDT | Mesoscale Discussion | SPC | Autauga, Barbour, Bibb, Blount, Bullock, Butler and 29 more | 87 min |
| Jun 4, 12:09 PM CDT | Severe Thunderstorm Watch | SPC | Nassau | 3 hr |
Nearby
Mesoscale Discussions in Georgia, 2012Mesoscale Discussions in Alabama, 2012Mesoscale Discussions in Florida, 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.