Alert archive / Georgia / Special Weather Statements in 2013

Special Weather Statement, NWS Atlanta, GA

August 12, 2013Murray County, Whitfield County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 12, 2013, 11:14 PM EDT for Murray County, Whitfield County, Georgia. It was in force for 31 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 12, 2013, 11:14 PM EDT (03:14 UTC)
Expired: Aug 12, 2013, 11:45 PM EDT
In force: 31 min
Issued by: NWS Atlanta, GA

Counties Murray County, GA, Whitfield County, GA

The radar

The Northeast Alabama radar (KHTX), 117 km from the middle of the area, began a volume at 03:13 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

Nashville Metro, TN (KBNA), launched 00:00Z, 3.2 hours before the alert went out and 227 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: 1817 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 810 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 107 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 5.4

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 12, 9:32 PM EDT, 1 hour 42 minutes earlier.

Area forecast discussion, Aug 12, 9:32 PM EDT, 1 hour 42 minutes before

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Hazardous weather outlook, Aug 12, 10:41 PM EDT, 33 minutes before

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In the hours before

Special weather statement, Aug 12, 7:13 PM EDT, 4 hours 1 minute before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
713 PM EDT MON AUG 12 2013

GAZ042-044-053-054-122345-
713 PM EDT MON AUG 12 2013

...SIGNIFICANT WEATHER ADVISORY FOR 40 MPH WINDS IN CARROLL...
COWETA...FAYETTE AND FULTON COUNTIES UNTIL 745 PM EDT...

AT 708 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS FROM PLANT YATES TO 10 MILES WEST OF MORELAND...
MOVING EAST AT 25 MPH. TREES CAN COME DOWN EASILY WITH ALREADY WET
SOIL. FREQUENT CLOUD TO GROUND LIGHTNING MAY ALSO DEVELOP WITH
THESE STORMS. THOSE OUTDOORS SHOULD SEEK SHELTER IMMEDIATELY!

WIND GUSTS OF 40 MPH ARE LIKELY AS THESE STORMS MOVE ACROSS
CARROLL...COWETA...FAYETTE AND FULTON COUNTIES THROUGH 745 PM EDT.
SOME LOCATIONS IN THE PATH OF THESE STORMS INCLUDE PLANT YATES...
WHITESBURG...ARNCO-SARGENT...DUNAWAY GARDENS...ROSCOE...NEWNAN...
MADRAS...MORELAND...THOMAS CROSSROADS...PALMETTO...CANNONGATE...
SHARPSBURG...TYRONE...PEACHTREE CITY AND TURIN.

&&

LAT...LON 3358 8463 3341 8457 3329 8461 3325 8488
      3337 8482 3334 8497 3350 8497
TIME...MOT...LOC 2313Z 255DEG 24KT 3348 8487 3336 8484
          3325 8489

Special weather statement, Aug 12, 7:44 PM EDT, 3 hours 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
744 PM EDT MON AUG 12 2013

GAZ072-073-082>084-130015-
744 PM EDT MON AUG 12 2013

...SIGNIFICANT WEATHER ADVISORY FOR PEA SIZED HAIL AND 45 MPH WINDS
IN TWIGGS...JONES...WILKINSON...BALDWIN AND BIBB COUNTIES UNTIL 815
PM EDT...

AT 742 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER FRANKLINTON...MOVING EAST AT 10 MPH.
TREES CAN COME DOWN EASILY WITH ALREADY WET SOIL. FREQUENT CLOUD
TO GROUND LIGHTNING MAY ALSO DEVELOP WITH THIS STORM. THOSE OUTDOORS
SHOULD SEEK SHELTER IMMEDIATELY!

WIND GUSTS OF 45 MPH ARE LIKELY AS THIS STORM MOVES ACROSS TWIGGS...
JONES...WILKINSON...BALDWIN AND BIBB COUNTIES THROUGH 815 PM EDT.
SOME LOCATIONS IN THE PATH OF THE STORM INCLUDE DRY BRANCH...
FRANKLINTON...CROSS KEYS...GRISWOLDVILLE...MOUNTAIN SPRINGS AND
MYRICKS MILL.

&&

LAT...LON 3296 8334 3276 8334 3275 8360 3287 8361
TIME...MOT...LOC 2343Z 250DEG 10KT 3282 8351

Special weather statement, Aug 12, 7:46 PM EDT, 3 hours 28 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
746 PM EDT MON AUG 12 2013

GAZ055-057-130015-
746 PM EDT MON AUG 12 2013

...SIGNIFICANT WEATHER ADVISORY FOR PENNY SIZED HAIL AND 50 MPH WINDS
IN HENRY AND CLAYTON COUNTIES UNTIL 815 PM EDT...

AT 745 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER BONANZA...MOVING EAST AT 15 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE PENNY SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 50 MPH AS IT MOVES ACROSS
HENRY AND CLAYTON COUNTIES THROUGH 815 PM EDT. SOME LOCATIONS IN THE
PATH OF THIS STORM INCLUDE IRONDALE...JW SMITH RESERVOIR...BONANZA...
ATLANTA MOTOR SPEEDWAY...LOVEJOY...LAKE SPIVEY...HAMPTON...EAGLES
LANDING...FLIPPEN...BLACKSVILLE AND MCDONOUGH. HEAVY DOWNPOURS WILL
CAUSE PONDING OF WATER ON ROADWAYS.

&&

LAT...LON 3350 8442 3351 8441 3353 8421 3342 8410
      3334 8421 3334 8425 3335 8425 3335 8436
      3336 8440 3341 8439 3343 8440 3345 8438
      3347 8438
TIME...MOT...LOC 2347Z 279DEG 13KT 3345 8435

Special weather statement, Aug 12, 7:49 PM EDT, 3 hours 25 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
749 PM EDT MON AUG 12 2013

GAZ056-130015-
749 PM EDT MON AUG 12 2013

...SIGNIFICANT WEATHER ADVISORY FOR DIME SIZED HAIL AND 45 MPH WINDS
IN SPALDING COUNTY UNTIL 815 PM EDT...

AT 745 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER GRIFFIN...MOVING EAST AT 15 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
SPALDING COUNTY THROUGH 815 PM EDT. SOME LOCATIONS IN THE PATH OF
THIS STORM INCLUDE EXPERIMENT...HIGHLAND MILLS...GRIFFIN AND WALKER
MILL. HEAVY DOWNPOURS WILL CAUSE PONDING OF WATER ON ROADWAYS.

&&

LAT...LON 3328 8432 3332 8415 3330 8412 3325 8412
      3320 8413 3320 8432
TIME...MOT...LOC 2350Z 254DEG 14KT 3324 8422

Local storm report, Aug 12, 8:01 PM EDT, 3 hours 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
801 PM EDT MON AUG 12 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0745 PM     TSTM WND DMG     SHARPSBURG              33.34N 84.65W
08/12/2013                   COWETA             GA   PUBLIC

            TREES DOWN NEAR THOMAS CROSSROADS. POWER ALSO REPORTED
            OUT.

&&

GWETZEL

Special weather statement, Aug 12, 11:14 PM EDT, 0 minutes before

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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 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, 6:22 PM EDT	Special Weather Statement	FFC	Chattahoochee	23 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.