Alert archive / Georgia / Mesoscale Discussions in 2012
Mesoscale Discussion 1069
The Storm Prediction Center issued this mesoscale discussion at Jun 5, 2012, 10:42 AM CDT for 7 counties in Alabama; Gadsden County, Holmes County, Jackson County, Florida; 88 counties in Georgia. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 5, 2012, 10:42 AM CDT (15:42 UTC)
- Expired
- Jun 5, 2012, 12:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 98 counties
Barbour County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Lee County, AL, Russell County, AL, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Baldwin 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, Chatham County, GA, Chattahoochee County, GA, Clay County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crawford County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Glynn County, GA, Grady County, GA, Harris County, GA, Houston County, GA, Irwin County, GA, Jeff Davis County, GA, Jenkins 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, Macon County, GA, Marion County, GA, McIntosh County, GA, Meriwether County, GA, Miller 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, Screven County, GA, Seminole 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, Thomas 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, Washington 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), 74 km from the middle of the area, began a volume at 15:43 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, 3.7 hours before the alert went out and 167 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
- 2120 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 477 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.1
The text
As transmitted, in the capitals the NWS used until 2016.
353
ACUS11 KWNS 051543
SWOMCD
SPC MCD 051542
SCZ000-GAZ000-FLZ000-ALZ000-051745-
MESOSCALE DISCUSSION 1069
NWS STORM PREDICTION CENTER NORMAN OK
1042 AM CDT TUE JUN 05 2012
AREAS AFFECTED...FAR EASTERN AL/FAR NORTH FL AND CENTRAL/SOUTHERN GA
TO FAR SOUTHERN SC
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 051542Z - 051745Z
PROBABILITY OF WATCH ISSUANCE...80 PERCENT
SUMMARY...POTENTIAL FOR DAMAGING WINDS AND SOME SEVERE HAIL WILL
GRADUALLY INCREASE BY EARLY AFTERNOON. THIS SHOULD ESPECIALLY BE THE
CASE ACROSS CENTRAL/SOUTHEAST GA TO FAR SOUTHERN SC. A SEVERE TSTM
WATCH WILL LIKELY BE NEEDED FOR AT LEAST PORTIONS OF THE REGION BY
17Z-18Z.
DISCUSSION...AMID RELATIVELY AMPLIFIED NORTHWESTERLY FLOW
ALOFT...DUAL WEAKENING MCV/S EXIST ACROSS THE REGION LATE THIS
MORNING...ONE ACROSS SOUTHERN AL AND ANOTHER OVER NORTH GA PER
SATELLITE/RADAR IMAGERY. AHEAD OF THESE MCV/S...AND ALONG/SOUTH OF A
SOUTHWARD SAGGING FRONTAL BOUNDARY ACROSS GA/SC...TSTMS ARE LIKELY
TO INCREASE IN COVERAGE/INTENSITY BY EARLY AFTERNOON WITHIN A
PROGRESSIVELY UNSTABLE BOUNDARY LAYER. AS TEMPERATURES QUICKLY WARM
THROUGH THE 80S F...MODIFICATIONS TO 12Z REGIONAL OBSERVED SOUNDINGS
REFLECT THE POTENTIAL FOR MLCAPE TO 1500-3000 J/KG...ESPECIALLY
ACROSS SOUTHERN GA/FAR NORTH FL. AS STORMS
INCREASE/MATURE...MODERATELY STRONG NORTHWESTERLY MID/HIGH LEVEL
FLOW...ESPECIALLY COLLOCATED WITH THE SOUTHWARD SAGGING FRONTAL
ZONE...WILL SUPPORT EAST-SOUTHEASTWARD MOVING TSTM CLUSTERS...AND
PERHAPS A COUPLE OF BRIEF SUPERCELLS ESPECIALLY NEAR THE
FRONT...WITH WIND DAMAGE AND MARGINALLY SEVERE HAIL POSSIBLE.
..GUYER/MEAD.. 06/05/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CHS...CAE...JAX...FFC...TAE...BMX...
LAT...LON 33298441 33158314 32828167 32098082 30998143 31038258
30508459 30818615 31568551 33108530 33298441SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 5, 11:24 AM CDT | Severe Thunderstorm Watch | SPC | Geneva, Henry, Houston | 9 hr |
| Jun 5, 2:34 PM CDT | Mesoscale Discussion | SPC | Houston | 86 min |
| Jun 5, 3:50 PM CDT | Mesoscale Discussion | SPC | Geneva, Houston | 85 min |
| Jun 5, 6:26 PM CDT | Mesoscale Discussion | SPC | Geneva, Henry, Houston | 94 min |
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.