Alert archive / Georgia / Special Weather Statements in 2015

Special Weather Statement, NWS Atlanta, GA

May 28, 2015Cobb County, Georgia

NWS Atlanta, GA issued this special weather statement at May 28, 2015, 2:17 PM EDT for Cobb County, Georgia. It was in force for 28 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: May 28, 2015, 2:17 PM EDT (18:17 UTC)
Expired: May 28, 2015, 2:45 PM EDT
In force: 28 min
Issued by: NWS Atlanta, GA

County Cobb County, GA

The radar

The Atlanta radar (KFFC), 60 km from the middle of the area, began a volume at 18:17 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, 6.3 hours before the alert went out and 61 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: 397 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 722 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 65 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 May 28, 2:17 PM EDT, 0 minutes earlier.

Area forecast discussion, May 28, 2:17 PM EDT, 0 minutes before

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Hazardous weather outlook, May 28, 11:54 AM EDT, 2 hours 23 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1154 AM EDT THU MAY 28 2015

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-291000-
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-
1154 AM EDT THU MAY 28 2015

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

.DAY ONE...THIS AFTERNOON AND TONIGHT...

SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP THROUGH THE
AFTERNOON AND CONTINUE THROUGH AT LEAST SUNSET THIS EVENING...
ESPECIALLY ALONG AND NORTH OF THE I-85 AND I-20 CORRIDOR. ASIDE
FROM HEAVY RAIN WHICH COULD RESULT IN RAPID PONDING OF WATER IN
LOW LYING AND POOR DRAINAGE AREAS...A FEW STORMS COULD BECOME
STRONG WITH BRIEF GUSTY WINDS UP TO 45 MPH.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

THE CHANCE FOR THUNDERSTORMS WILL EXIST EACH DAY THROUGH THE
MIDDLE OF NEXT WEEK...ESPECIALLY DURING THE AFTERNOON AND EVENING
HOURS. THE PRIMARY THREATS WILL CONTINUE TO BE GUSTY WINDS...
FREQUENT LIGHTNING AND LOCALLY HEAVY RAINFALL.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT REQUESTED BUT SPOTTERS ARE ENCOURAGED
TO SUBMIT REPORTS OF IMPACT WEATHER OR DAMAGE.

DJN

In the hours before

Special weather statement, May 28, 12:25 PM EDT, 1 hour 52 minutes before

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Special weather statement, May 28, 1:29 PM EDT, 48 minutes before

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Special weather statement, May 28, 1:40 PM EDT, 37 minutes before

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Special weather statement, May 28, 2:03 PM EDT, 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
203 PM EDT THU MAY 28 2015

GAZ038-050-281900-
OGLETHORPE GA-GREENE GA-
203 PM EDT THU MAY 28 2015

...SIGNIFICANT WEATHER ADVISORY FOR HEAVY RAIN AND MINOR
FLOODING IN OGLETHORPE AND GREENE COUNTIES UNTIL 300 PM EDT...

AT 201 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORMS WITH VERY HEAVY RAINFALL CENTERED NEAR
WOODVILLE...OR 9 MILES NORTHEAST OF GREENSBORO. THESE STORM WERE
NEARLY STATIONARY.

RUNOFF FROM THESE STORMS WILL CAUSE MINOR FLOODING OF SMALL CREEKS
AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES ACROSS
OGLETHORPE AND GREENE COUNTIES...INCLUDING AREAS AROUND
WOODVILLE...MAXEYS...STEPHENS AND PENFIELD.

IF DRIVING...PLEASE SLOW DOWN AND INCREASE THE DISTANCE BETWEEN YOU
AND THE VEHICLE IN FRONT OF YOU. DO NOT DRIVE INTO FLOODED AREAS!

LAT...LON 3386 8300 3364 8300 3365 8324 3380 8320
TIME...MOT...LOC 1801Z 090DEG 4KT 3370 8311

Special weather statement, May 28, 2:17 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
217 PM EDT THU MAY 28 2015

GAZ032-281845-
COBB GA-
217 PM EDT THU MAY 28 2015

...SIGNIFICANT WEATHER ADVISORY FOR DIME SIZED HAIL AND 35 MPH WINDS
IN WESTERN COBB COUNTY UNTIL 245 PM EDT...

AT 216 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED NEAR POWDER SPRINGS...OR 8 MILES
SOUTHWEST OF MARIETTA...MOVING NORTH AT 10 MPH.

THESE STORMS HAVE THE POTENTIAL TO PRODUCE DIME SIZED SIZED HAIL...
FREQUENT CLOUD TO GROUND LIGHTNING...WIND GUSTS TO 35 MPH AND VERY
HEAVY RAINFALL AS THEY MOVE ACROSS COBB COUNTY THROUGH 245 PM EDT.

SOME LOCATIONS IN THE PATH OF THESE STORMS INCLUDE POWDER
SPRINGS...AUSTELL... LITHIA SPRINGS...DUE WEST...LOST MOUNTAIN PARK
AND MABLETON.

LAT...LON 3398 8467 3383 8459 3380 8466 3381 8467
      3381 8472 3393 8473 3395 8472 3395 8473
TIME...MOT...LOC 1816Z 164DEG 12KT 3387 8466

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 8:20 PM EDT	Special Weather Statement	FFC	Glascock	25 min
May 27, 8:23 PM EDT	Special Weather Statement	FFC	Dooly	37 min
May 27, 10:13 PM EDT	Special Weather Statement	FFC	Troup	32 min
May 27, 10:50 PM EDT	Special Weather Statement	FFC	Troup	25 min
May 27, 11:15 PM EDT	Special Weather Statement	FFC	Coweta, Fayette	30 min
May 27, 11:46 PM EDT	Special Weather Statement	FFC	Clayton, Fayette	29 min
May 28, 1:05 AM EDT	Special Weather Statement	FFC	Clayton, DeKalb, Fulton, Gwinnett, Rockdale	25 min
May 28, 1:33 AM EDT	Special Weather Statement	FFC	Gwinnett, Rockdale	27 min
May 28, 1:58 AM EDT	Special Weather Statement	FFC	Barrow, Morgan, Newton, Walton	32 min
May 28, 12:25 PM EDT	Special Weather Statement	FFC	Coweta	50 min
May 28, 1:29 PM EDT	Special Weather Statement	FFC	Coweta	31 min
May 28, 1:40 PM EDT	Special Weather Statement	FFC	Clarke	65 min
May 28, 2:03 PM EDT	Special Weather Statement	FFC	Oglethorpe	57 min
May 28, 2:22 PM EDT	Special Weather Statement	FFC	Oglethorpe	23 min
May 28, 2:52 PM EDT	Special Weather Statement	FFC	Carroll	53 min
May 28, 2:55 PM EDT	Special Weather Statement	FFC	Henry	65 min
May 28, 4:01 PM EDT	Special Weather Statement	FFC	Coweta	59 min
May 28, 4:06 PM EDT	Special Weather Statement	FFC	Banks, Hall	54 min
May 28, 4:12 PM EDT	Special Weather Statement	FFC	Gordon	63 min
May 28, 4:20 PM EDT	Flash Flood Warning	FFC	Coweta, Meriwether	6 hr
May 28, 4:50 PM EDT	Special Weather Statement	FFC	Forsyth	55 min
May 28, 4:56 PM EDT	Special Weather Statement	FFC	Gordon	34 min
May 28, 4:59 PM EDT	Severe Thunderstorm Warning	FFC	Floyd, Gordon	19 min
May 28, 5:12 PM EDT	Special Weather Statement	FFC	Whitfield	33 min
May 28, 5:34 PM EDT	Special Weather Statement	FFC	Murray, Whitfield	41 min
May 28, 5:59 PM EDT	Special Weather Statement	FFC	Troup	61 min

Nearby

Special Weather Statements in Georgia, 2015 Every 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.