Alert archive / Georgia / Mesoscale Discussions in 2012
Mesoscale Discussion 198
The Storm Prediction Center issued this mesoscale discussion at Mar 1, 2012, 1:44 PM EST for 14 counties in Georgia; Beaufort County, Jasper County, South Carolina. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Mar 1, 2012, 1:44 PM EST (18:44 UTC)
- Expired
- Mar 1, 2012, 3:15 PM EST
- In force
- 91 min
- Issued by
- the Storm Prediction Center
Counties Bryan County, GA, Bulloch County, GA, Candler County, GA, Chatham County, GA, Dodge County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Laurens County, GA, Montgomery County, GA, Tattnall County, GA, Toombs County, GA, Treutlen County, GA, Wheeler County, GA, Beaufort County, SC, Jasper County, SC
The radar
The Charleston,SC radar (KCLX), 96 km from the middle of the area, began a volume at 18:44 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
Charleston AFB, SC (KCHS), launched 12:00Z, 6.7 hours before the alert went out and 197 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
- 598 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 637 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 189 m²/s²
- 0-3 km storm-relative helicity
- 165 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 3.1
The text
As transmitted, in the capitals the NWS used until 2016.
805
ACUS11 KWNS 011844
SWOMCD
SPC MCD 011844
SCZ000-GAZ000-012015-
MESOSCALE DISCUSSION 0198
NWS STORM PREDICTION CENTER NORMAN OK
1244 PM CST THU MAR 01 2012
AREAS AFFECTED...PARTS OF CNTRL/SE GA INTO SRN SOUTH CAROLINA
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 011844Z - 012015Z
THE NEED FOR A WW IS NOT CURRENTLY ANTICIPATED...BUT TRENDS WILL BE
MONITORED FOR THE POSSIBILITY OF AN INCREASING SEVERE THREAT.
NARROW BAND OF CONVECTION AND DEVELOPING STORMS...CURRENTLY
EXTENDING FROM NEAR DUBLIN GA INTO AREAS SOUTH OF CHARLESTON SC...
APPEARS TO BE FOCUSED ON A PRE-FRONTAL CONFLUENCE ZONE READILY
EVIDENT IN LATEST RUC 850 MB MOISTURE ANALYSIS. ACTIVITY IS
EMBEDDED WITHIN AN ENVIRONMENT CHARACTERIZED BY MOST UNSTABLE CAPE
OF 500-1000+ J/KG...AND STRONG WESTERLY DEEP LAYER MEAN FLOW AND
SHEAR OF 50+ KT...THOUGH WITH RATHER MODEST...AND WEAKENING...
LOW-LEVEL WIND FIELDS. WITH FURTHER BOUNDARY LAYER HEATING...
CONDITIONS MAY BECOME SUPPORTIVE OF ADDITIONAL STORM DEVELOPMENT AND
INTENSIFICATION...POSSIBLY ACCOMPANIED BY INCREASING POTENTIAL FOR
MARGINAL SEVERE HAIL AND WIND GUSTS. THROUGH 21-22Z...THE EAST-WEST
LINE OF STORMS WILL PROBABLY REMAIN SOUTH OF CHARLESTON...BUT COULD
SHIFT SOUTHWARD INTO THE SAVANNAH GA VICINITY...AND NEARBY
GEORGIA/SOUTH CAROLINA COASTAL AREAS.
..KERR.. 03/01/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CHS...JAX...FFC...
LAT...LON 32388348 32598257 32678147 32558061 32458049 31968079
31828138 31908229 31998307 32388348SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 1, 4:00 AM EST | Mesoscale Discussion | SPC | Baldwin, Barrow, Bibb, Burke, Butts, Carroll and 51 more | 90 min |
| Mar 1, 11:24 AM EST | Mesoscale Discussion | SPC | Baker, Calhoun, Chattahoochee, Clay, Crisp, Decatur and 14 more | 96 min |
Nearby
Mesoscale Discussions in Georgia, 2012Mesoscale Discussions in South Carolina, 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.