Alert archive / Georgia / Special Weather Statements in 2012

Special Weather Statement, NWS Atlanta, GA

April 5, 2012Gilmer County, Georgia

NWS Atlanta, GA issued this special weather statement at Apr 5, 2012, 3:08 PM EDT for Gilmer County, Georgia. It was in force for 37 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 5, 2012, 3:08 PM EDT (19:08 UTC)
Expired
Apr 5, 2012, 3:45 PM EDT
In force
37 min
Issued by
NWS Atlanta, GA

County Gilmer County, GA

The radar

The Northeast Alabama radar (KHTX), 134 km from the middle of the area, began a volume at 19:12 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 12:00Z, 7.1 hours before the alert went out and 145 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 12:00Z on 2012-04-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 145 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2012-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -21 square meters per square second.19395878Sfc1 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
145 J/kg
Mixed-layer CIN
-139 J/kg
Mixed-layer LCL
871 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
-21 m²/s²
0-3 km storm-relative helicity
-41 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

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

017 
WWUS82 KFFC 051908
SPSFFC

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
308 PM EDT THU APR 5 2012

GAZ005-007-051945-
308 PM EDT THU APR 5 2012

...SIGNIFICANT WEATHER ADVISORY FOR PEA SIZED HAIL AND 40 MPH WINDS
IN MURRAY AND GILMER COUNTIES UNTIL 345 PM EDT...

AT 306 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER TAILS CREEK...MOVING NORTHEAST AT 20 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE PEA SIZED HAIL...OCCASIONAL
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH AS IT MOVES ACROSS
MURRAY AND GILMER COUNTIES THROUGH 345 PM EDT. SOME LOCATIONS IN THE
PATH OF THIS STORM INCLUDE CARTERS...RAMHURST...TAILS CREEK...EAST
ELLIJAY...ELLIJAY...MOUNTAINTOWN AND CHERRY LOG. HEAVY DOWNPOURS WILL
CAUSE PONDING OF WATER ON ROADWAYS.

&&

LAT...LON 3473 8432 3458 8465 3460 8472 3461 8473
      3460 8472 3462 8471 3463 8473 3461 8475
      3461 8477 3465 8480 3486 8457 3485 8445
TIME...MOT...LOC 1908Z 225DEG 19KT 3470 8464

$$

16

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 4, 8:37 PM EDTSpecial Weather StatementFFCDeKalb, Fulton23 min
Apr 5, 3:04 PM EDTSpecial Weather StatementFFCHouston56 min
Apr 5, 3:14 PM EDTSpecial Weather StatementFFCBibb46 min
Apr 5, 3:26 PM EDTSpecial Weather StatementFFCBleckley49 min
Apr 5, 3:57 PM EDTSpecial Weather StatementFFCCatoosa, Walker33 min
Apr 5, 4:12 PM EDTSpecial Weather StatementFFCJohnson, Laurens, Washington, Wilkinson63 min
Apr 5, 4:14 PM EDTSpecial Weather StatementFFCStewart61 min
Apr 5, 4:20 PM EDTSpecial Weather StatementFFCToombs25 min
Apr 5, 4:40 PM EDTSpecial Weather StatementFFCSumter, Webster65 min
Apr 5, 4:51 PM EDTSevere Thunderstorm WarningFFCEmanuel, Jefferson, Johnson, Laurens, Treutlen, Washington and 1 more54 min
Apr 5, 5:44 PM EDTSpecial Weather StatementFFCSumter61 min
Apr 5, 6:26 PM EDTSpecial Weather StatementFFCCrisp64 min
Apr 5, 7:03 PM EDTSpecial Weather StatementFFCCatoosa27 min
Apr 5, 7:33 PM EDTSpecial Weather StatementFFCDade42 min

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.