Alert archive / Georgia / Special Weather Statements in 2012

Special Weather Statement, NWS Atlanta, GA

August 7, 2012Union County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 7, 2012, 4:52 PM EDT for Union County, Georgia. It was in force for 38 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
Aug 7, 2012, 4:52 PM EDT (20:52 UTC)
Expired
Aug 7, 2012, 5:30 PM EDT
In force
38 min
Issued by
NWS Atlanta, GA

County Union County, GA

The radar

The Knoxville radar (KMRX), 159 km from the middle of the area, began a volume at 20:53 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, 8.9 hours before the alert went out and 168 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 2012-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 717 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 2012-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.1939Sfc1 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
717 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
568 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
-24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

430 
WWUS82 KFFC 072052
SPSFFC

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
452 PM EDT TUE AUG 7 2012

GAZ008-072130-
452 PM EDT TUE AUG 7 2012

...SIGNIFICANT WEATHER ADVISORY FOR HEAVY RAIN IN UNION COUNTY UNTIL
530 PM EDT...

AT 449 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR OWLTOWN...MOVING SOUTH AT 5 MPH.

RAINFALL AMOUNTS ESTIMATED BETWEEN ONE TO ONE AND A HALF INCHES 
HAVE FALLEN ACROSS UNION COUNTY...INCLUDING AREAS AROUND JONES 
CREEK...OWLTOWN...BLAIRSVILLE...TRACK ROCK...NOTTELY DAM...IVY 
LOG...WOODS HOLE SHELTER...GOOCH MOUNTAIN SHELTER...HAWK MOUNTAIN 
SHELTER...VOGEL STATE PARK...SUCHES AND GADDISTOWN. DRIVERS SHOULD 
USE CAUTION AS INTENSE RAINFALL WILL REDUCE VISIBILITIES. PONDING OF 
WATER ON ROADWAYS IS ALSO LIKELY.

&&

LAT...LON 3492 8391 3490 8381 3480 8378 3478 8383
      3473 8383 3474 8394 3464 8404 3466 8412
      3465 8415 3476 8409 3480 8410 3481 8414
      3489 8411 3494 8417 3496 8417 3499 8413
      3499 8394
TIME...MOT...LOC 2051Z 349DEG 5KT 3481 8398

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 2:11 AM EDTSpecial Weather StatementFFCUnion34 min
Aug 7, 2:21 PM EDTSpecial Weather StatementFFCCherokee24 min
Aug 7, 3:36 PM EDTSpecial Weather StatementFFCCobb39 min
Aug 7, 4:15 PM EDTSpecial Weather StatementFFCToombs30 min
Aug 7, 4:32 PM EDTSpecial Weather StatementFFCMontgomery, Telfair, Wheeler28 min
Aug 7, 4:40 PM EDTSpecial Weather StatementFFCWilkes35 min
Aug 7, 4:44 PM EDTSpecial Weather StatementFFCToombs16 min
Aug 7, 4:58 PM EDTSpecial Weather StatementFFCMontgomery, Telfair, Toombs, Wheeler32 min
Aug 7, 5:02 PM EDTSevere Thunderstorm WarningFFCMontgomery, Wheeler43 min
Aug 7, 5:09 PM EDTSpecial Weather StatementFFCWilkes36 min
Aug 7, 5:20 PM EDTSpecial Weather StatementFFCEmanuel25 min
Aug 7, 5:49 PM EDTSpecial Weather StatementFFCLaurens26 min
Aug 7, 5:59 PM EDTSpecial Weather StatementFFCJohnson31 min
Aug 7, 6:22 PM EDTSpecial Weather StatementFFCJohnson23 min
Aug 7, 6:57 PM EDTSpecial Weather StatementFFCGlascock33 min
Aug 7, 7:05 PM EDTSpecial Weather StatementFFCWashington25 min
Aug 7, 7:17 PM EDTSpecial Weather StatementFFCHall28 min
Aug 7, 7:34 PM EDTSpecial Weather StatementFFCGlascock, Washington86 min
Aug 7, 7:56 PM EDTSpecial Weather StatementFFCBanks, Madison49 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.