Alert archive / Georgia / Special Weather Statements in 2013

Special Weather Statement, NWS Atlanta, GA

August 13, 2013Chattahoochee County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 13, 2013, 6:22 PM EDT for Chattahoochee County, Georgia. It was in force for 23 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 13, 2013, 6:22 PM EDT (22:22 UTC)
Expired: Aug 13, 2013, 6:45 PM EDT
In force: 23 min
Issued by: NWS Atlanta, GA

County Chattahoochee County, GA

The radar

The Maxwell AFB radar (KMXX), 82 km from the middle of the area, began a volume at 22:22 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, 10.4 hours before the alert went out and 122 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: 421 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 774 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 13, 3:25 PM EDT, 2 hours 57 minutes earlier.

Area forecast discussion, Aug 13, 3:25 PM EDT, 2 hours 57 minutes before

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Hazardous weather outlook, Aug 13, 10:00 AM EDT, 8 hours 22 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1000 AM EDT TUE AUG 13 2013

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-141000-
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-
1000 AM EDT TUE AUG 13 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH AND CENTRAL
GEORGIA.

.DAY ONE...TODAY AND TONIGHT...

SCATTERED TO NUMEROUS THUNDERSTORMS EXPECTED TODAY INTO TONIGHT

WEATHER HAZARDS EXPECTED...
HEAVY RAIN WITH LOCALIZED FLOODING...GUSTY WINDS AND FREQUENT
LIGHTNING.

DISCUSSION...
A SURFACE TROUGH IS IN PLACE ACROSS NORTH GEORGIA...AND A COLD FRONT
WILL MOVE INTO NORTH GEORGIA TONIGHT. THESE FEATURES COMBINED WITH
PLENTIFUL SURFACE MOISTURE AND INCREASING INSTABILITY WILL PRODUCE
SCATTERED TO NUMEROUS THUNDERSTORMS...MAINLY THIS AFTERNOON AND
EVENING. A FEW OF THESE STORMS COULD BECOME STRONG WITH GUSTY WINDS
AND SMALL HAIL. THE INITIAL ROUND OF STORMS WILL SHIFT SOUTH THIS
AFTERNOON AS THE SURFACE TROUGH PUSHES THROUGH THE STATE. A
SECONDARY AREA OF SHOWERS AND THUNDERSTORMS WILL LIKELY DEVELOP
ALONG THE FRONT IN NORTH GEORGIA THIS EVENING...AND ISOLATED TO
SCATTERED SHOWERS MAY LINGER OVERNIGHT...SHIFTING SOUTH AS THE FRONT
MOVES THROUGH.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

WEATHER HAZARDS EXPECTED...
HEAVY RAIN WITH LOCALIZED FLOODING...GUSTY WINDS AND FREQUENT
LIGHTNING.

DISCUSSION...
A STATIONARY FRONT AND DEVELOPING UPPER LEVEL TROUGH WILL BECOME THE
FOCUS FOR A WET PERIOD WITH SHOWERS AND THUNDERSTORMS FOR MANY
LOCATIONS. CONDITIONS WILL CONTINUE TO BE MONITORED CLOSELY FOR
POTENTIAL FLOODING.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT REQUESTED BUT SPOTTERS ARE ENCOURAGED
TO SUBMIT REPORTS OF SEVERE WEATHER OR FLOODING THROUGH THE WEB BY
GOING TO WEATHER.GOV/ATLANTA.

In the hours before

Special weather statement, Aug 13, 3:47 PM EDT, 2 hours 35 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
347 PM EDT TUE AUG 13 2013

GAZ106-132015-
347 PM EDT TUE AUG 13 2013

...SIGNIFICANT WEATHER ADVISORY FOR 40 MPH WINDS IN CRISP COUNTY
UNTIL 415 PM EDT...

AT 346 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS FROM CORDELE TO ARABI...MOVING EAST AT 20 MPH.

THESE STORMS HAVE THE POTENTIAL TO PRODUCE PEA SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH AS THEY MOVE
ACROSS CRISP COUNTY THROUGH 415 PM EDT. SOME LOCATIONS IN THE PATH OF
THESE STORMS INCLUDE GEORGIA VETERANS MEMORIAL STATE PARK...WENONA...
RAINES...ARABI...CORDELE...EAST CRISP...HATLEY AND TREMONT. HEAVY
DOWNPOURS WILL CAUSE PONDING OF WATER ON ROADWAYS.

&&

LAT...LON 3183 8388 3188 8390 3203 8394 3203 8361
      3181 8361 3180 8362 3180 8380
TIME...MOT...LOC 1947Z 263DEG 17KT 3203 8380 3191 8372
          3181 8372

Special weather statement, Aug 13, 4:41 PM EDT, 1 hour 41 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
441 PM EDT TUE AUG 13 2013

GAZ107-132115-
441 PM EDT TUE AUG 13 2013

...SIGNIFICANT WEATHER ADVISORY FOR 45 MPH WINDS IN PULASKI COUNTY
UNTIL 515 PM EDT...

AT 439 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER WALLACE...MOVING EAST AT 20 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE DIME SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 45 MPH AS IT MOVES ACROSS
PULASKI COUNTY THROUGH 515 PM EDT. SOME LOCATIONS IN THE PATH OF THIS
STORM INCLUDE WALLACE...HARTFORD...HAWKINSVILLE AND OCMULGEE BANKS.
HEAVY DOWNPOURS WILL CAUSE PONDING OF WATER ON ROADWAYS.

&&

LAT...LON 3215 8357 3227 8357 3231 8339 3227 8335
      3225 8337 3218 8330 3215 8332 3214 8331
      3213 8331
TIME...MOT...LOC 2041Z 264DEG 19KT 3220 8350

Special weather statement, Aug 13, 6:22 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
622 PM EDT TUE AUG 13 2013

GAZ090-132245-
622 PM EDT TUE AUG 13 2013

...SIGNIFICANT WEATHER ADVISORY FOR 40 MPH WINDS IN CHATTAHOOCHEE
COUNTY UNTIL 645 PM EDT...

AT 617 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER FORT BENNING/LAWSON ARMY AIR FIELD...MOVING
EAST AT 15 MPH.  THOSE OUTSIDE SHOULD SEEK SHELTER NOW!

THIS STORM HAS THE POTENTIAL TO PRODUCE PEA SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH AS IT MOVES ACROSS
CHATTAHOOCHEE COUNTY THROUGH 645 PM EDT. SOME LOCATIONS IN THE PATH
OF THIS STORM INCLUDE FORT BENNING/LAWSON ARMY AIR FIELD AND
JAMESTOWN/SOUTH FORT BENNING. HEAVY DOWNPOURS WILL CAUSE PONDING OF
WATER ON ROADWAYS.

&&

LAT...LON 3236 8499 3237 8499 3237 8495 3238 8494
      3241 8482 3226 8480 3227 8492 3230 8495
      3232 8500 3232 8501 3235 8501
TIME...MOT...LOC 2222Z 264DEG 15KT 3231 8496

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 8:09 PM EDT	Severe Thunderstorm Warning	FFC	Henry, Spalding	51 min
Aug 12, 11:14 PM EDT	Special Weather Statement	FFC	Murray, Whitfield	31 min
Aug 13, 3:47 PM EDT	Special Weather Statement	FFC	Crisp	28 min
Aug 13, 4:41 PM EDT	Special Weather Statement	FFC	Pulaski	34 min
Aug 13, 6:48 PM EDT	Special Weather Statement	FFC	Coweta	42 min
Aug 13, 7:30 PM EDT	Special Weather Statement	FFC	Coweta	45 min
Aug 13, 7:36 PM EDT	Severe Thunderstorm Warning	FFC	Clayton, Coweta, Fayette, Henry, Meriwether, Spalding	39 min

Nearby

Special Weather Statements in Georgia, 2013 Every special weather statement in 2013

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.