Alert archive / Georgia / Special Weather Statements in 2015

Special Weather Statement, NWS Atlanta, GA

July 13, 2015DeKalb County, Fulton County, Gwinnett County, Georgia

NWS Atlanta, GA issued this special weather statement at Jul 13, 2015, 12:14 AM EDT for DeKalb County, Fulton County, Gwinnett County, Georgia. It was in force for 46 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
Jul 13, 2015, 12:14 AM EDT (04:14 UTC)
Expired
Jul 13, 2015, 1:00 AM EDT
In force
46 min
Issued by
NWS Atlanta, GA

Counties DeKalb County, GA, Fulton County, GA, Gwinnett County, GA

The radar

The Atlanta radar (KFFC), 62 km from the middle of the area, began a volume at 04:16 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 00:00Z, 4.2 hours before the alert went out and 59 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 00:00Z on 2015-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 843 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 2015-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 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
843 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
1601 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
76 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

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 Jul 12, 10:08 PM EDT, 2 hours 6 minutes earlier.

Area forecast discussion, Jul 12, 10:08 PM EDT, 2 hours 6 minutes before
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Hazardous weather outlook, Jul 12, 9:49 PM EDT, 2 hours 25 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATE
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
949 PM EDT SUN JUL 12 2015

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-131130-
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-
949 PM EDT SUN JUL 12 2015

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

.DAY ONE...REST OF TONIGHT...

ISOLATED THUNDERSTORMS ARE POSSIBLE THROUGH TONIGHT.

WEATHER HAZARDS...
WIND GUSTS UP TO 40 MPH... LOCALLY HEAVY RAIN AND FREQUENT
LIGHTNING.

DISCUSSION...
WEAK UPPER DISTURBANCES EMBEDDED WITHIN THE NORTHWEST FLOW ALOFT
WILL HAVE THE POTENTIAL TO SPARK A FEW STORMS OVERNIGHT. ALTHOUGH A
FEW COULD BE STRONG... SEVERE STORMS ARE NOT EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

SEVERE THUNDERSTORMS WILL BE POSSIBLE MONDAY AND TUESDAY WITH
DAMAGING WINDS AND FREQUENT LIGHTNING BEING THE PRIMARY HAZARDS.
HAIL AND HEAVY RAINFALL WILL ALSO BE POSSIBLE. THUNDERSTORM
CHANCES WILL CONTINUE THROUGH SATURDAY.

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

In the hours before

Special weather statement, Jul 12, 10:53 PM EDT, 1 hour 21 minutes before
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Special weather statement, Jul 12, 10:58 PM EDT, 1 hour 16 minutes before
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Special weather statement, Jul 12, 11:30 PM EDT, 44 minutes before
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Special weather statement, Jul 12, 11:42 PM EDT, 32 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1142 PM EDT SUN JUL 12 2015

GAZ052-130415-
HEARD GA-
1142 PM EDT SUN JUL 12 2015

...SIGNIFICANT WEATHER ADVISORY FOR HEARD COUNTY UNTIL 1215 AM EDT...

AT 1142 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR EPHESUS...OR 7 MILES WEST OF FRANKLIN...
MOVING SOUTHEAST AT 25 MPH.

  HAZARD...UP TO 40 MPH WIND...PEA SIZED HAIL AND FREQUENT CLOUD TO
           GROUND LIGHTNING.

  IMPACT...PEOPLE OUTDOORS SHOULD SEEK SHELTER IMMEDIATELY. EXPECT
           MINOR DAMAGE TO TREE LIMBS AND BLOWING AROUND OF
           LIGHT...UNSECURED OBJECTS. ELECTRICAL APPLIANCES SHOULD
           NOT BE USED UNLESS IN AN EMERGENCY.

SOME LOCATIONS IN THE PATH OF THIS STORM INCLUDE
FRANKLIN...EPHESUS...CENTRALHATCHEE...GLENN...FROLONA...TEXAS...
ROOSTERVILLE...WARESVILLE AND PARAN.

LAT...LON 3342 8529 3343 8527 3343 8515 3321 8497
      3317 8509 3318 8509 3320 8511 3318 8511
      3318 8512 3316 8512 3313 8524
TIME...MOT...LOC 0342Z 328DEG 20KT 3331 8522
Special weather statement, Jul 12, 11:50 PM EDT, 24 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1150 PM EDT SUN JUL 12 2015

GAZ021-032-033-130415-
COBB GA-NORTH FULTON GA-CHEROKEE GA-
1150 PM EDT SUN JUL 12 2015

...SIGNIFICANT WEATHER ADVISORY FOR COBB...NORTH FULTON AND CHEROKEE
COUNTIES UNTIL 1215 AM EDT...

AT 1150 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR BUFFINGTON...OR NEAR CANTON...MOVING
SOUTHEAST AT 20 MPH.

  HAZARD...UP TO 40 MPH WIND...PEA SIZED HAIL AND FREQUENT CLOUD TO
           GROUND LIGHTNING.

  IMPACT...PEOPLE OUTDOORS SHOULD SEEK SHELTER IMMEDIATELY. EXPECT
           MINOR DAMAGE TO TREE LIMBS AND BLOWING AROUND OF
           LIGHT...UNSECURED OBJECTS. ELECTRICAL APPLIANCES SHOULD
           NOT BE USED UNLESS IN AN EMERGENCY.

SOME LOCATIONS IN THE PATH OF THIS STORM INCLUDE
CANTON...SANDY SPRINGS...ROSWELL...ALPHARETTA...MILTON...WOODSTOCK...
HOLLY SPRINGS...HICKORY FLAT...SWEAT MOUNTAIN...BIRMINGHAM...LEBANON
AND UNION HILL.

LAT...LON 3417 8426 3411 8426 3410 8423 3410 8422
      3409 8420 3397 8441 3417 8454 3427 8437
TIME...MOT...LOC 0350Z 328DEG 19KT 3418 8442
Special weather statement, Jul 13, 12:14 AM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1214 AM EDT MON JUL 13 2015

GAZ032>034-044-045-130500-
DE KALB GA-COBB GA-NORTH FULTON GA-SOUTH FULTON GA-GWINNETT GA-
1214 AM EDT MON JUL 13 2015

...SIGNIFICANT WEATHER ADVISORY FOR DE KALB...COBB...FULTON AND
GWINNETT COUNTIES UNTIL 100 AM EDT...

AT 1211 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORMS EXTENDING FROM NEAR DULUTH TO NEAR
DUNWOODY TO NEAR MARIETTA...AND MOVING SOUTHEAST AT 25 MPH.

  HAZARD...WINDS UP TO 40 MPH...FREQUENT LIGHTNING AND HEAVY RAIN.

  IMPACT...PEOPLE OUTDOORS SHOULD SEEK SHELTER IMMEDIATELY. EXPECT
           BLOWING AROUND OF LIGHT...UNSECURED OBJECTS. LOCALIZED
           FLOODING IN LOW LYING AND POOR DRAINAGE AREAS IS ALSO
           LIKELY. MOTORISTS SHOULD SLOW DOWN AND BE PREPARED FOR
           POSSIBLE LOSS OF CONTROL DUE TO HYDROPLANING.

SOME LOCATIONS IN THE PATH OF THESE STORMS INCLUDE
ATLANTA...MARIETTA...LAWRENCEVILLE...DECATUR...SANDY SPRINGS...
ROSWELL...JOHNS CREEK...SMYRNA...DUNWOODY...EAST POINT...DULUTH...
SUGAR HILL...SNELLVILLE...SUWANEE...COLLEGE PARK...LILBURN...
LOGANVILLE...CHAMBLEE...NORCROSS AND DORAVILLE.

LAT...LON 3402 8432 3407 8417 3406 8415 3405 8410
      3407 8412 3409 8411 3410 8409 3391 8383
      3372 8406 3362 8411 3364 8416 3365 8422
      3363 8423 3363 8424 3365 8425 3365 8444
      3364 8445 3365 8452 3400 8456
TIME...MOT...LOC 0411Z 323DEG 24KT 3402 8413 3396 8428 3396 8452

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 9:28 PM EDTSpecial Weather StatementFFCGordon32 min
Jul 12, 9:59 PM EDTSpecial Weather StatementFFCGordon31 min
Jul 12, 10:30 PM EDTSpecial Weather StatementFFCDouglas30 min
Jul 12, 10:31 PM EDTSpecial Weather StatementFFCGordon29 min
Jul 12, 10:53 PM EDTSpecial Weather StatementFFCFayette37 min
Jul 12, 10:58 PM EDTSpecial Weather StatementFFCCherokee32 min
Jul 12, 11:30 PM EDTSpecial Weather StatementFFCSpalding30 min
Jul 12, 11:42 PM EDTSpecial Weather StatementFFCHeard33 min
Jul 12, 11:50 PM EDTSpecial Weather StatementFFCCherokee25 min
Jul 13, 12:57 AM EDTSpecial Weather StatementFFCWalton48 min
Jul 13, 1:37 AM EDTSpecial Weather StatementFFCMorgan, Oconee23 min
Jul 13, 1:52 AM EDTSpecial Weather StatementFFCGreene38 min
Jul 13, 3:35 AM EDTHeat AdvisoryFFCDodge, Emanuel, Johnson, Laurens, Montgomery, Telfair and 3 more15 hr
Jul 13, 3:44 PM EDTSpecial Weather StatementFFCCrisp, Dooly31 min
Jul 13, 4:45 PM EDTSpecial Weather StatementFFCSumter30 min
Jul 13, 5:13 PM EDTSpecial Weather StatementFFCSumter32 min
Jul 13, 6:26 PM EDTSpecial Weather StatementFFCEmanuel49 min
Jul 13, 7:11 PM EDTSpecial Weather StatementFFCEmanuel49 min
Jul 13, 7:32 PM EDTSevere Thunderstorm WarningFFCEmanuel, Treutlen43 min

Nearby

Special Weather Statements in Georgia, 2015Every special weather statement in 2015

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.