Alert archive / Georgia / Special Weather Statements in 2015

Special Weather Statement, NWS Atlanta, GA

May 18, 2015Newton County, Rockdale County, Georgia

NWS Atlanta, GA issued this special weather statement at May 18, 2015, 6:42 PM EDT for Newton County, Rockdale 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: May 18, 2015, 6:42 PM EDT (22:42 UTC)
Expired: May 18, 2015, 7:15 PM EDT
In force: 33 min
Issued by: NWS Atlanta, GA

Counties Newton County, GA, Rockdale County, GA

The radar

The Atlanta radar (KFFC), 74 km from the middle of the area, began a volume at 22:46 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, 10.7 hours before the alert went out and 68 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: 133 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 1120 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 40 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 18, 2:59 PM EDT, 3 hours 43 minutes earlier.

Area forecast discussion, May 18, 2:59 PM EDT, 3 hours 43 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
259 PM EDT MON MAY 18 2015

.SHORT TERM /TONIGHT THROUGH TUESDAY NIGHT/...
SHORT WAVE MOVING NORTHEAST ACROSS AL THIS AFTERNOON IS VISIBLE ON
SATELLITE. THIS COULD CONTINUE TO ENHANCE CONVECTION ACROSS THE
FORECAST AREA THIS AFTERNOON AND EVENING. THERE SHOULD BE A GRADUAL
DIMINISHING OF COVERAGE TONIGHT...BUT AIR MASS STILL UNSTABLE ENOUGH
TO LEAVE LOW CHANCE POPS IN ALL NIGHT. UPPER RIDGE FLATTENING SOME
THROUGH THE PERIOD AND A FRONTAL BOUNDARY SHOULD DRIFT SOUTH INTO GA
BY MORNING. MODELS SEEM TO BE HOLDING ON TO THE MOISTURE A BIT
LONGER...SO HAVE KEPT POPS IN FOR THE ENTIRE FORECAST AREA THROUGH
TUESDAY. GRADUAL DRYING ACROSS THE AREA TUESDAY NIGHT EXCEPT FOR A
PORTION OF CENTRAL. GUIDANCE TEMPERATURES LOOK REASONABLE AND HAVE
STAYED CLOSE.

41

.LONG TERM /WEDNESDAY THROUGH MONDAY/...
MAINLY ONLY TWEAKS TO THE LONG TERM BASED ON THE LASTEST GUIDANCE.

BDL

PREVIOUS DISCUSSION...
LONG TERM PERIOD BEGINS WITH A DRIER AIRMASS MOVING INTO THE STATE
BEHIND THE EXITING FRONTAL SYSTEM. STILL KEEPING IN A SLIGHT
CHANCE ACROSS CENTRAL GA WED AS THERE IS STILL A BIT OF RESIDUAL
MOISTURE REMAINING ACROSS SOUTHERN PORTIO0NS OF THE CWA. THIS
DRIER AIRMASS IS SHORT LIVED AS A FEW WAVES MOVE ACROSS THE AREA
THROUGH THE WEEKEND IN THE ZONAL UPPER LEVEL FLOW. THESE WAVES ARE
ALL WEAK WITH VERY LITTLE DYNAMICS AND NOT MUCH INSTABILITY SO
WILL CONTINUE WITH SLIGHT/CHANCE POPS THROUGH DAY SEVEN WITH
ISOLATED TSRA.

01

&&

.AVIATION...
18Z UPDATE...CONVECTION WILL CONTINUE INTO THE AFTERNOON AND MAY LAST
UNTIL 00Z-02Z IN SOME LOCATIONS. THERE COULD BE ISOLATED STORMS INTO
THE OVERNIGHT BUT CHANCE TOO LOW TO PUT IN TAF. A FRONT WILL BE
DROPPING INTO NORTH GA 12Z-15Z TUESDAY WITH WINDS BECOMING MORE
NORTHWEST AROUND 10KT. CEILINGS GENERALLY VFR BUT THERE WILL BE
SOME SCT-BKN025-035 THIS AFTERNOON AND EVENING. CONVECTION DEVELOPING
AGAIN TUESDAY...BUT MAINLY ACROSS CENTRAL GA FORECAST AREA.

//ATL CONFIDENCE...18Z UPDATE...
MEDIUM ON TO HIGH ON ALL ELEMENTS.

41

&&

.PRELIMINARY POINT TEMPS/POPS...
ATHENS          67  88  65  89 /  60  40  20  10
ATLANTA         69  86  67  87 /  60  40  10  10
BLAIRSVILLE     62  81  57  83 /  60  40  10   5
CARTERSVILLE    65  85  61  86 /  60  40  10  10
COLUMBUS        70  88  68  90 /  50  40  20  20
GAINESVILLE     67  85  65  86 /  60  40  10  10
MACON           67  90  66  91 /  60  40  20  30
ROME            65  85  61  86 /  60  40  10  10
PEACHTREE CITY  66  86  63  88 /  60  40  10  20
VIDALIA         69  90  70  91 /  60  50  40  30

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SHORT TERM...41
LONG TERM....BDL
AVIATION...41

Hazardous weather outlook, May 18, 10:30 AM EDT, 8 hours 12 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1030 AM EDT MON MAY 18 2015

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-191000-
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-
1030 AM EDT MON MAY 18 2015

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

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

SCATTERED THUNDERSTORMS ARE EXPECTED OVER NORTH AND CENTRAL GEORGIA
THROUGH TONIGHT.

WEATHER HAZARDS EXPECTED...
LOCALLY HEAVY RAIN...FREQUENT LIGHTNING AND GUSTY WINDS...WITH ANY
STRONGER STORMS. SEVERE STORMS ARE NOT EXPECTED.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

A WEAK COLD FRONT WILL BRING A CHANCE OF THUNDERSTORMS ACROSS
MUCH OF NORTH AND CENTRAL GEORGIA TUESDAY. ALTHOUGH A FEW STORMS
COULD BE STRONG WITH LOCALLY HEAVY RAIN...LIGHTNING AND
GUSTY WINDS...SEVERE STORMS ARE NOT EXPECTED AT THIS TIME. A SLIGHTLY
DRIER AIRMASS MOVES IN ACROSS THE STATE WEDNESDAY BUT WILL KEEP
IN A SLIGHT CHANCE TO A CHANCE OF STORMS THROUGH SUNDAY AS WEAK
UPPER LEVEL DISTURBANCES CONTINUE ACROSS THE REGION THROUGH THE
WEEKEND.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT.

In the hours before

Local storm report, May 18, 6:11 PM EDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
611 PM EDT MON MAY 18 2015

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

0550 PM     TSTM WND DMG     ELLIJAY                 34.70N  84.48W
05/18/2015                   GILMER             GA   EMERGENCY MNGR

            THE GILMER COUNTY EMERGENCY MANAGER REPORTED TREES DOWN
            ATR HIGHWAYS 52 AND 382.

&&

EVENT NUMBER FFC1500285

20

Local storm report, May 18, 6:12 PM EDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
612 PM EDT MON MAY 18 2015

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

0550 PM     TSTM WND DMG     2 SSE CHOPPED OAK       34.76N  84.45W
05/18/2015                   GILMER             GA   EMERGENCY MNGR

            THE GILMER COUNTY EMERGENCY MANAGER REPORTED TREES DOWN
            ON BOARDTOWN ROAD.

&&

CORRECTED REMARKS

EVENT NUMBER FFC1500284

20

Special weather statement, May 18, 6:13 PM EDT, 29 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
613 PM EDT MON MAY 18 2015

GAZ045-046-054-055-057-182245-
DE KALB GA-HENRY GA-CLAYTON GA-ROCKDALE GA-FAYETTE GA-
613 PM EDT MON MAY 18 2015

...SIGNIFICANT WEATHER ADVISORY FOR 45 MPH WINDS AND PEA SIZED HAIL
IN DE KALB... HENRY...CLAYTON...ROCKDALE AND FAYETTE COUNTIES UNTIL
645 PM EDT...

AT 611 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM NEAR TUCKER
TO NEAR TYRONE...AND MOVING EAST AT 25 MPH.

WIND GUSTS OF 45 MPH...PEA SIZED HAIL...FREQUENT LIGHTNING...AND
HEAVY RAINFALL ARE LIKELY AS THESE STORMS MOVE ACROSS PORTIONS OF DE
KALB...HENRY...CLAYTON...ROCKDALE AND FAYETTE COUNTIES THROUGH 645
PM EDT.

SOME LOCATIONS IN THE PATH OF THESE STORMS INCLUDE
MCDONOUGH...DECATUR...FAYETTEVILLE...CONYERS...JONESBORO...PEACHTREE
CITY...STOCKBRIDGE...FOREST PARK...RIVERDALE...CLARKSTON...HAMPTON...
MORROW...LOVEJOY...STONE MOUNTAIN...AVONDALE ESTATES...LAKE CITY...
LITHONIA...PINE LAKE...CANDLER-MCAFEE AND GEORGIA INTERNATIONAL HORSE
PARK.

DRIVERS SHOULD ALSO USE CAUTION AS INTENSE RAINFALL WILL REDUCE
VISIBILITIES. PONDING OF WATER ON ROADWAYS IS ALSO LIKELY.

LAT...LON 3343 8457 3365 8438 3365 8435 3369 8435
      3386 8420 3384 8414 3378 8408 3375 8403
      3378 8399 3375 8392 3371 8391 3371 8393
      3368 8392 3352 8405 3351 8405 3334 8419
TIME...MOT...LOC 2211Z 277DEG 20KT 3384 8418 3346 8453

Special weather statement, May 18, 6:24 PM EDT, 18 minutes before

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Special weather statement, May 18, 6:29 PM EDT, 13 minutes before

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Special weather statement, May 18, 6:42 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
May 18, 12:57 PM EDT	Special Weather Statement	FFC	Clayton, Cobb, DeKalb, Fulton	33 min
May 18, 1:50 PM EDT	Special Weather Statement	FFC	Spalding	25 min
May 18, 2:01 PM EDT	Special Weather Statement	FFC	DeKalb, Rockdale	29 min
May 18, 2:28 PM EDT	Special Weather Statement	FFC	Jones	32 min
May 18, 2:46 PM EDT	Special Weather Statement	FFC	Morgan, Walton	29 min
May 18, 2:55 PM EDT	Special Weather Statement	FFC	Jasper, Newton, Putnam	35 min
May 18, 3:12 PM EDT	Special Weather Statement	FFC	Dade	33 min
May 18, 3:27 PM EDT	Special Weather Statement	FFC	Morgan, Oconee	33 min
May 18, 4:15 PM EDT	Special Weather Statement	FFC	Cobb	30 min
May 18, 4:21 PM EDT	Severe Thunderstorm Warning	FFC	Cobb	24 min
May 18, 4:38 PM EDT	Special Weather Statement	FFC	Wilkes	22 min
May 18, 4:38 PM EDT	Severe Thunderstorm Warning	FFC	Cobb, Fulton	37 min
May 18, 4:59 PM EDT	Special Weather Statement	FFC	Wilcox	46 min
May 18, 5:13 PM EDT	Special Weather Statement	FFC	DeKalb, Gwinnett	32 min
May 18, 5:39 PM EDT	Special Weather Statement	FFC	Marion	36 min
May 18, 5:40 PM EDT	Special Weather Statement	FFC	Clayton, DeKalb	35 min
May 18, 5:44 PM EDT	Special Weather Statement	FFC	Wilcox	61 min
May 18, 5:48 PM EDT	Special Weather Statement	FFC	Johnson	27 min
May 18, 5:49 PM EDT	Special Weather Statement	FFC	Cherokee, Dawson, Fannin, Gilmer, Lumpkin	41 min
May 18, 6:13 PM EDT	Special Weather Statement	FFC	Clayton, DeKalb, Fayette, Henry, Rockdale	32 min
May 18, 6:24 PM EDT	Special Weather Statement	FFC	Emanuel	51 min
May 18, 6:29 PM EDT	Special Weather Statement	FFC	Lumpkin, Union, White	46 min
May 18, 6:46 PM EDT	Special Weather Statement	FFC	Henry	29 min
May 18, 6:51 PM EDT	Special Weather Statement	FFC	Webster	24 min
May 18, 7:17 PM EDT	Special Weather Statement	FFC	Towns, White	28 min
May 18, 7:18 PM EDT	Special Weather Statement	FFC	Webster	27 min
May 18, 7:28 PM EDT	Special Weather Statement	FFC	Henry, Spalding	32 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.