Alert archive / Georgia / Mesoscale Discussions in 2012
Mesoscale Discussion 1602
The Storm Prediction Center issued this mesoscale discussion at Jul 26, 2012, 12:30 PM CDT for 17 counties in Alabama; 9 counties in Florida; 72 counties in Georgia. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 26, 2012, 12:30 PM CDT (17:30 UTC)
- Expired
- Jul 26, 2012, 3:00 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 5%
All 98 counties
Barbour County, AL, Bullock County, AL, Chambers County, AL, Coffee County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Elmore County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Lee County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Russell County, AL, Tallapoosa County, AL, Baker County, FL, Bradford County, FL, Columbia County, FL, Hamilton County, FL, Holmes County, FL, Jackson County, FL, Madison County, FL, Suwannee County, FL, Union 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, Calhoun 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, Decatur County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Echols County, GA, Grady County, GA, Harris County, GA, Houston County, GA, Irwin County, GA, Jeff Davis County, GA, Lanier County, GA, Laurens County, GA, Lee County, GA, Lowndes County, GA, Macon County, GA, Marion 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, Seminole 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, 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 nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 5.5 hours before the alert went out and 138 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
- 2537 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 736 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 122 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
761
ACUS11 KWNS 261731
SWOMCD
SPC MCD 261730
FLZ000-GAZ000-ALZ000-262000-
MESOSCALE DISCUSSION 1602
NWS STORM PREDICTION CENTER NORMAN OK
1230 PM CDT THU JUL 26 2012
AREAS AFFECTED...SERN AL...SWRN/S-CNTRL GA...PARTS OF NRN FL
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 261730Z - 262000Z
PROBABILITY OF WATCH ISSUANCE...5 PERCENT
SUMMARY...AN ISOLATED SVR TSTM THREAT WILL EXIST THROUGH THE
AFTERNOON...AND WW ISSUANCE IS NOT NEEDED.
DISCUSSION...ISOLATED TO SCATTERED THUNDERSTORM DEVELOPMENT WILL
CONTINUE ALONG THE NRN PERIPHERY OF A MID/HIGH-LEVEL CLOUD SHIELD
EMANATING FROM CLUSTERS OF CONVECTION OVER THE NERN GULF OF MEXICO.
ADDITIONAL STORMS WILL DEVELOP ALONG INLAND-MOVING SEA BREEZE
BOUNDARIES AND CUMULUS-DEFINED CONVERGENCE BANDS. OUTSIDE OF THE
AFOREMENTIONED CLOUD SHIELD...STRONG DIURNAL HEATING -- I.E. SFC
TEMPS IN THE LOWER/MIDDLE 90S -- AMIDST RICH DEEP MOISTURE -- I.E.
1.8-2.1-INCH PW VALUES PER GPS DATA -- IS SUPPORTING MLCAPE VALUES
OF 2500-4000 J/KG PER MODIFIED ATLANTA/TALLAHASSEE 12Z RAOBS. THESE
FACTORS WILL SUPPORT INTENSE UPDRAFTS/DOWNDRAFTS...AND PERHAPS A FEW
STORMS ATTAINING MARGINALLY SVR LEVELS. ISOLATED MICROBURSTS WITH
DMGG WIND GUSTS WILL BE THE MAIN CONCERN. HOWEVER...WITH GENERALLY
AOB 15 KT OF LOW/MID-LEVEL FLOW PER AREA VWP DATA...STORMS ARE
EXPECTED TO EXHIBIT A PREDOMINANTLY PULSE/DISORGANIZED MODE.
..COHEN/HART.. 07/26/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CHS...JAX...FFC...TAE...BMX...MOB...
LAT...LON 32238660 32848626 33148578 33208501 33048400 32898333
32718272 32118212 31638186 30228180 29738222 29818291
30428355 30678465 30598545 30798627 31318662 32238660Nearby
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.