Alert archive / Georgia / Special Weather Statements in 2012

Special Weather Statement, NWS Atlanta, GA

August 28, 2012Jasper County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 28, 2012, 11:33 AM EDT for Jasper County, Georgia. It was in force for 57 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 28, 2012, 11:33 AM EDT (15:33 UTC)
Expired: Aug 28, 2012, 12:30 PM EDT
In force: 57 min
Issued by: NWS Atlanta, GA

County Jasper County, GA

The radar

The Atlanta radar (KFFC), 89 km from the middle of the area, began a volume at 15:34 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, 3.6 hours before the alert went out and 83 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 374 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 511 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 82 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.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Atlanta, GA wrote its last area forecast discussion before this special weather statement went out at Aug 28, 10:33 AM EDT, 1 hour earlier.

Area forecast discussion, Aug 28, 10:33 AM EDT, 1 hour before

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Hazardous weather outlook, Aug 28, 10:51 AM EDT, 42 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1051 AM EDT TUE AUG 28 2012

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-291500-
BALDWIN-BANKS-BARROW-BARTOW-BIBB-BLECKLEY-BUTTS-CARROLL-CATOOSA-
CHATTAHOOCHEE-CHATTOOGA-CHEROKEE-CLARKE-CLAYTON-COBB-COWETA-
CRAWFORD-CRISP-DADE-DAWSON-DEKALB-DODGE-DOOLY-DOUGLAS-EMANUEL-
FANNIN-FAYETTE-FLOYD-FORSYTH-GILMER-GLASCOCK-GORDON-GREENE-
GWINNETT-HALL-HANCOCK-HARALSON-HARRIS-HEARD-HENRY-HOUSTON-JACKSON-
JASPER-JEFFERSON-JOHNSON-JONES-LAMAR-LAURENS-LUMPKIN-MACON-
MADISON-MARION-MERIWETHER-MONROE-MONTGOMERY-MORGAN-MURRAY-
MUSCOGEE-NEWTON-NORTH FULTON-OCONEE-OGLETHORPE-PAULDING-PEACH-
PICKENS-PIKE-POLK-PULASKI-PUTNAM-ROCKDALE-SCHLEY-SOUTH FULTON-
SPALDING-STEWART-SUMTER-TALBOT-TALIAFERRO-TAYLOR-TELFAIR-TOOMBS-
TOWNS-TREUTLEN-TROUP-TWIGGS-UNION-UPSON-WALKER-WALTON-WARREN-
WASHINGTON-WEBSTER-WHEELER-WHITE-WHITFIELD-WILCOX-WILKES-
WILKINSON-
1051 AM EDT TUE AUG 28 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH AND CENTRAL GEORGIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT...
ISOLATED THUNDERSTORMS AND SOME AREAS OF HEAVY RAIN ARE EXPECTED
TODAY AND TONIGHT. NO SEVERE THUNDERSTORMS ARE EXPECTED AT THIS TIME.

.SYNOPSIS...
A TROPICAL AIRMASS WILL CONTINUE OVER THE AREA AS TROPICAL STORM
ISAAC HEADS FOR LOUISIANA. A WEAK COLD FRONT WILL DRIFT INTO FAR
NORTH GEORGIA TONIGHT.

.PRIMARY HAZARDS...
THE PRIMARY HAZARDS FROM THUNDERSTORMS WILL BE GUSTY WINDS...PERIODS
OF HEAVY RAIN AND ISOLATED LIGHTNING. THE MOST LIKELY TIME FOR
THUNDERSTORMS WILL BE FROM MIDDAY INTO TONIGHT.

.DISCUSSION...
A TROPICAL AIRMASS WILL PROVIDE ABUNDANT MOISTURE OVER THE FORECAST
AREA. CAPES OF 1000 OR LESS CAN BE EXPECTED. THE MOISTURE AND
INSTABILITY WILL COMBINE TO PRODUCE NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS.
HOWEVER...VERTICAL WIND SHEAR IS EXPECTED TO BE FAIRLY WEAK AND
INSUFFICIENT TO PRODUCE ANY ORGANIZED OR ROTATING STORMS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...
THE TROPICAL AIRMASS WILL CONTINUE FOR MUCH OF THE DAY 2 THROUGH 7
PERIOD AND PRODUCE SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT.

In the hours before

Special weather statement, Aug 28, 11:33 AM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1133 AM EDT TUE AUG 28 2012

GAZ049-059-281630-
1133 AM EDT TUE AUG 28 2012

...SIGNIFICANT WEATHER ADVISORY FOR HEAVY RAIN IN MORGAN AND JASPER
COUNTIES UNTIL 1230 PM EDT...

AT 1120 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS WITH HEAVY RAIN FROM MONTICELLO TO MADISON...MOVING NORTH AT
15 MPH. RAINFALL AMOUNTS UP TO 2 INCHES HAVE OCCURRED IN THIS AREA
SINCE THIS MORNING.

ADDITIONAL RAINFALL AMOUNTS OF ANOTHER INCH CAN BE EXPECTED ACROSS
MORGAN AND JASPER COUNTIES...INCLUDING AREAS AROUND PIEDMONT...
MONTICELLO...CALVIN...SHADY DALE...FARRAR...REESE AND GODFREY.
DRIVERS SHOULD USE CAUTION AS INTENSE RAINFALL WILL REDUCE
VISIBILITIES. TEMPORARY STREET FLOODING AND PONDING OF WATER ON
ROADWAYS IS LIKELY.

&&

LAT...LON 3345 8345 3343 8353 3324 8354 3326 8374
      3348 8373 3348 8371 3350 8371 3349 8368
      3351 8369 3354 8368 3356 8345
TIME...MOT...LOC 1525Z 175DEG 12KT 3336 8370

16

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 12:34 PM EDT	Special Weather Statement	FFC	Morgan	56 min
Aug 28, 1:41 PM EDT	Special Weather Statement	FFC	Morgan, Walton	49 min
Aug 28, 1:57 PM EDT	Special Weather Statement	FFC	Barrow, Jackson, Oconee	48 min
Aug 28, 2:48 PM EDT	Special Weather Statement	FFC	Jefferson	42 min
Aug 28, 2:49 PM EDT	Special Weather Statement	FFC	Banks, Clarke, Jackson, Madison	56 min
Aug 28, 6:37 PM EDT	Special Weather Statement	FFC	Meriwether, Talbot	38 min

Nearby

Special Weather Statements in Georgia, 2012 Every 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.