Alert archive / Georgia / Special Weather Statements in 2015

Special Weather Statement, NWS Atlanta, GA

July 12, 2015Heard County, Georgia

NWS Atlanta, GA issued this special weather statement at Jul 12, 2015, 11:42 PM EDT for Heard County, Georgia. It was in force for 33 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 12, 2015, 11:42 PM EDT (03:42 UTC)
Expired
Jul 13, 2015, 12:15 AM EDT
In force
33 min
Issued by
NWS Atlanta, GA

County Heard County, GA

The radar

The Atlanta radar (KFFC), 56 km from the middle of the area, began a volume at 03:42 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, 3.7 hours before the alert went out and 62 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, 1 hour 34 minutes earlier.

Area forecast discussion, Jul 12, 10:08 PM EDT, 1 hour 34 minutes before
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Hazardous weather outlook, Jul 12, 9:49 PM EDT, 1 hour 53 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, 10:30 PM EDT, 1 hour 12 minutes before
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Special weather statement, Jul 12, 10:31 PM EDT, 1 hour 11 minutes before
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Special weather statement, Jul 12, 10:53 PM EDT, 49 minutes before
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Special weather statement, Jul 12, 10:58 PM EDT, 44 minutes before
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Special weather statement, Jul 12, 11:30 PM EDT, 12 minutes before
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Special weather statement, Jul 12, 11:42 PM EDT, 0 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

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, 11:50 PM EDTSpecial Weather StatementFFCCherokee25 min
Jul 13, 12:14 AM EDTSpecial Weather StatementFFCDeKalb, Fulton, Gwinnett46 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.