Alert archive / Georgia / Mesoscale Discussions in 2011
Mesoscale Discussion 293
The Storm Prediction Center issued this mesoscale discussion at Mar 27, 2011, 10:51 AM CDT for 4 states. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- Mar 27, 2011, 10:51 AM CDT (15:51 UTC)
- Expired
- Mar 27, 2011, 12:15 PM CDT
- In force
- 84 min
- Issued by
- the Storm Prediction Center
All 91 counties
Barbour County, AL, Coffee County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Pike County, AL, Bay County, FL, Calhoun County, FL, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Leon County, FL, Liberty County, FL, Okaloosa County, FL, Walton County, FL, Washington County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien 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, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Echols County, GA, Effingham County, GA, Evans County, GA, Glynn County, GA, Grady County, GA, Houston County, GA, Irwin County, GA, Jeff Davis 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, McIntosh County, GA, Miller County, GA, Mitchell County, GA, Montgomery County, GA, Peach County, GA, Pierce County, GA, Pulaski County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Seminole County, GA, Stewart County, GA, Sumter 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, Turner County, GA, Ware County, GA, Wayne County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Worth County, GA, Beaufort County, SC, Jasper County, SC
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 3.9 hours before the alert went out and 116 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
- 1068 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 620 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 174 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 6.0
The text
As transmitted, in the capitals the NWS used until 2016.
073
ACUS11 KWNS 271552
SWOMCD
SPC MCD 271551
SCZ000-GAZ000-FLZ000-ALZ000-271715-
MESOSCALE DISCUSSION 0293
NWS STORM PREDICTION CENTER NORMAN OK
1051 AM CDT SUN MAR 27 2011
AREAS AFFECTED...SE AL...SRN GA...SRN SC...FL PANHANDLE
CONCERNING...SEVERE THUNDERSTORM WATCH 68...
VALID 271551Z - 271715Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 68
CONTINUES.
RISK OF SURFACE-BASED THUNDERSTORMS WILL INCREASE EARLY THIS
AFTERNOON WITH THREATS OF VERY LARGE HAIL...ISOLATED TORNADOES AND
DAMAGING WIND GUSTS.
MORNING BAND OF ELEVATED STORMS ALONG/N OF THE WAVY FRONT FROM SC
MIDLANDS WWD INTO CNTRL AL HAS CONTAINED BRIEF SUPERCELL STRUCTURES
WITH LARGE HAIL. LATE MORNING MESOANALYSIS SHOWS THAT THE BOUNDARY
LAYER WAS HEATING STEADILY AHEAD OF THESE STORMS AND THE MORNING
ACTIVITY WILL BE JOINED BY WARM-SECTOR BANDS/CLUSTERS OF STORMS
THROUGH THE AFTERNOON. THESE STORMS WILL BE ROOTED IN THE DEEPENING
MOIST BOUNDARY LAYER EXHIBITING MLCAPES TO 1500 J/KG WITH A GOOD
PART OF THAT CAPE PROFILE BELOW MINUS 10 DEG C. COUPLED WITH 40-50
KTS OF EFFECTIVE VERTICAL SHEAR...RISKS FOR SUPERCELLS WITH VERY
LARGE HAIL WILL RESULT.
THE LOW-LEVEL WIND PROFILE IS GENERALLY VEERED AND UNIDIRECTIONAL IN
THE WARM SECTOR WITH THE STRONGEST EFFECTIVE SRH LOCATED ACROSS
PARTS OF SE GA AND SRN SC. WHILE THE PRIMARY SVR THREAT WILL BE THE
LARGE HAIL...ISOLATED TORNADOES WILL REMAIN POSSIBLE...PARTICULARLY
ACROSS THE ABOVE MENTIONED AREAS.
..RACY.. 03/27/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CHS...JAX...FFC...TAE...BMX...MOB...
LAT...LON 31538681 32678434 32458257 32508102 32518042 31858048
31298128 30858226 30518369 30028481 30138553 30438670
30938710 31538681SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 26, 7:47 PM CDT | Tornado Watch | SPC | Bibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 17 more | 7 hr |
| Mar 26, 11:21 PM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 17 more | 54 min |
| Mar 27, 7:33 AM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Chambers, Chilton, Clay, Coosa and 16 more | 117 min |
| Mar 27, 8:55 AM CDT | Severe Thunderstorm Watch | SPC | Autauga, Barbour, Bullock, Butler, Chambers, Chilton and 17 more | 7 hr |
| Mar 27, 2:49 PM CDT | Mesoscale Discussion | SPC | Baldwin, Coffee, Covington, Dale, Geneva, Henry and 1 more | 56 min |
| Mar 27, 3:27 PM CDT | Severe Thunderstorm Watch | SPC | Coffee, Covington, Dale, Escambia, Geneva, Henry and 1 more | 5 hr |
| Mar 27, 6:24 PM CDT | Mesoscale Discussion | SPC | Baldwin, Coffee, Conecuh, Covington, Dale, Escambia and 4 more | 2 hr |
| Mar 26, 7:55 PM CDT | Mesoscale Discussion | SPC | Banks, Barrow, Bartow, Catoosa, Chattooga, Cherokee and 36 more | 95 min |
| Mar 26, 8:19 PM CDT | Severe Thunderstorm Watch | SPC | Banks, Barrow, Bartow, Burke, Catoosa, Chattooga and 39 more | 8 hr |
| Mar 26, 10:10 PM CDT | Mesoscale Discussion | SPC | Bryan, Bulloch, Candler, Chatham, Effingham, Evans and 3 more | 65 min |
| Mar 26, 11:43 PM CDT | Mesoscale Discussion | SPC | Banks, Barrow, Bartow, Burke, Catoosa, Chattooga and 38 more | 62 min |
| Mar 27, 2:03 AM CDT | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Ben Hill, Bibb, Bleckley and 40 more | 57 min |
| Mar 27, 2:25 AM CDT | Tornado Watch | SPC | Appling, Baldwin, Bibb, Bleckley, Bryan, Bulloch and 46 more | 3 hr |
Nearby
Mesoscale Discussions in Georgia, 2011Mesoscale Discussions in Florida, 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.