Alert archive / Georgia / Special Weather Statements in 2012

Special Weather Statement, NWS Atlanta, GA

April 27, 20124 counties in Georgia

NWS Atlanta, GA issued this special weather statement at Apr 27, 2012, 9:13 PM EDT for 4 counties in Georgia. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 27, 2012, 9:13 PM EDT (01:13 UTC)
Expired
Apr 27, 2012, 10:00 PM EDT
In force
47 min
Issued by
NWS Atlanta, GA

Counties Banks County, GA, Hall County, GA, Jackson County, GA, Madison County, GA

The radar

The Greer radar (KGSP), 130 km from the middle of the area, began a volume at 01:15 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.2 hours before the alert went out and 139 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.

Skew-T log-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 00:00Z on 2012-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 19 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 2012-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
19 J/kg
Mixed-layer CIN
-342 J/kg
Mixed-layer LCL
1206 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
103 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

367 
WWUS82 KFFC 280113
SPSFFC

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
913 PM EDT FRI APR 27 2012

GAZ023>025-027-280200-
913 PM EDT FRI APR 27 2012

...SIGNIFICANT WEATHER ADVISORY FOR FREQUENT LIGHTNING IN MADISON...
BANKS...HALL AND JACKSON COUNTIES UNTIL 1000 PM EDT...

AT 910 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS FROM COMMERCE TO DANIELSVILLE...MOVING EAST AT
30 MPH.

THESE STORMS HAVE THE POTENTIAL TO PRODUCE DIME SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 45 MPH AS THEY MOVE
ACROSS MADISON...BANKS...HALL AND JACKSON COUNTIES THROUGH 1000 PM
EDT. SOME LOCATIONS IN THE PATH OF THESE STORMS INCLUDE SANFORD...
CENTER...FIVE POINTS...DIAMOND HILL...NEESE...HULL...COLBERT...
NICHOLSON...APPLE VALLEY...PEACH STATE SPEEDWAY...COMMERCE...BANKS
CROSSING...MAYSVILLE...HOMER AND DANIELSVILLE. HEAVY DOWNPOURS WILL
CAUSE PONDING OF WATER ON ROADWAYS.

&&

LAT...LON 3441 8337 3433 8339 3425 8333 3427 8330
      3425 8325 3426 8310 3423 8307 3417 8309
      3405 8298 3403 8311 3405 8313 3401 8328
      3404 8339 3399 8352 3404 8358 3405 8364
      3422 8397 3429 8393 3449 8352
TIME...MOT...LOC 0113Z 270DEG 25KT 3418 8337 3411 8321

$$

Nearby

Special Weather Statements in Georgia, 2012Every special weather statement 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.