Alert archive / Georgia / Special Weather Statements in 2013

Special Weather Statement, NWS Atlanta, GA

July 17, 2013Walton County, Georgia

NWS Atlanta, GA issued this special weather statement at Jul 17, 2013, 7:41 PM EDT for Walton County, Georgia. It was in force for 34 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 17, 2013, 7:41 PM EDT (23:41 UTC)
Expired: Jul 17, 2013, 8:15 PM EDT
In force: 34 min
Issued by: NWS Atlanta, GA

County Walton County, GA

The radar

The Atlanta radar (KFFC), 87 km from the middle of the area, began a volume at 23:43 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, 11.7 hours before the alert went out and 82 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: 1643 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 832 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

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 Jul 17, 3:37 PM EDT, 4 hours 4 minutes earlier.

Area forecast discussion, Jul 17, 3:37 PM EDT, 4 hours 4 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
337 PM EDT WED JUL 17 2013

.SHORT TERM /TONIGHT THROUGH THURSDAY NIGHT/...
CURRENT SATELLITE LOOP SHOWS MAIN EASTERN WAVE MOVING INTO NE GA AT
THE MOMENT. THE CURRENT RADAR LOP SHOWS SHOWERS AND ISOLATED
THUNDERSTORMS POPPING UP ACROSS NE GA WHICH IS DEFINITELY BEING GENERATED
BY THIS WAVE. THE MAIN ENERGY FROM THIS WAVE IS EXPECTED TO STAY
ACROSS NORTH GA BUT BOTH OUR LOCAL WRF AND THE HRRR SHOW A BIT MORE
DIURNALLY DRIVEN POP UP SHRA/TSRA ACROSS THE STATE THROUGH 02-04Z
TONIGHT. THE SURFACE TO UPPER LEVEL RIDGE KEEPS OUR AREA IN MOIST
EASTERLY FLOW THROUGH THE SHORT TERM. THE MODELS ARE SHOWING ANOTHER
WEAKER WAVE MOVING ACROSS THE AREA THU IN THIS EASTERLY FLOW. WITH
THIS IN MIND SHOULD SEE ANOTHER DIURNALLY DRIVEN CONVECTIVE DAY THU.
THERE IS VERY LITTLE SHEAR IN THIS ATMOSPHERE BUT THE CAPES AND LIS
BOTH PEAK BETWEEN 18Z AND 00Z THIS AFTERNOON AND THURSDAY. TODAY
SHOULD BE THE WARMEST DAY THIS WEEK WITH RISING THICKNESSES TODAY
HOWEVER PRECIP/CLOUDS MAY OFFSET THE WARMING A LITTLE. H5 HEIGHTS
WILL BE DROPPING THURSDAY YIELDING A SLIGHTLY COOLER TEMPS. STAYING
CLOSE TO CURRENT FORECAST TEMPS AS THEY STILL LOOKS GOOD.

01

.LONG TERM /FRIDAY THROUGH WEDNESDAY/...
NO SIG CHANGES TO THE EXTENDED. ONLY CHANGE WERE TO THE POPS ON
SUNDAY WHERE OUR NEIGHBORS AND GUIDANCE SUGGESTS A LIKELY CHANCE
OF POPS. DECIDED TO GO WITH THAT FOR SUNDAY AFTERNOON. OTHERWISE
UPDATED THE DEWPOINTS...WINDS AND TEMPERATURES WITH NEW GUIDANCE.
HAVE ATTACHED PREVIOUS DISCUSSION FOR BREVITY.

ARG

&&

.PREV DISCUSSION... /ISSUED 730 AM EDT WED JUL 17 2013/

LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/...
/ISSUED AT 355 AM EDT WED JUL 17 2013/
A TRANSITION TAKES PLACE THIS PERIOD FROM EAST FLOW ALOFT TO
WESTERLY FLOW WITH A UPPER TROUGH DEVELOPING OVER THE EASTERN
STATES. GFS AND EUROPEAN ARE SIMILAR WITH THIS CHANGE UNTIL THE
MONDAY TO WEDNESDAY TIME FRAME WHEN THE EUROPEAN MOVES THE TROUGH
TO THE WESTERN ATLANTIC AND THE GFS KEEPS THE UPPER TROUGH OVER THE
OH/TN VALLEYS AS A STRONGER UPPER SHORT WAVE MOVES OVER THE MID U.S.
PLENTY OF MOISTURE AND INSTABILITY THIS PERIOD FOR AT LEAST
SCATTERED SHOWERS AND THUNDERSTORMS FOR MOST AREAS...TENDING TO
MAXIMIZE IN THE AFTERNOON AND EVENING HOURS. DEEPER MOISTURE MOVES
ACROSS THE AREA WITH THE INITIAL ONSET OF THE UPPER TROUGH
SUNDAY/MONDAY AS A FRONT BECOMES STATIONARY JUST N OF GA AND A
SURFACE TROUGH SETS UP FROM THE CAROLINAS INTO GA. TEMPERATURES
GENERALLY CLOSE TO NORMAL EXCEPT HIGH TEMPERATURES WILL RUN
SLIGHTLY BELOW NORMAL FROM SATURDAY ON.

BDL

AVIATION...
18Z UPDATE...
SOME FEW TO SCT CLOUDS FORMING ACROSS THE AREA THIS AFTERNOON.
CLOUDS MAINLY IN THE 4000-6000FT RANGE AND NOT EXPECTING THINGS TO
GO BKN OR OVC. SHRA/TSRA HAVE BEGUN POPPING UP AND SHOULD SEE MORE
COVERAGE OVER THE NEXT FEW HOURS. THESE SHOWER AND THUNDERSTORMS
SHOULD STA OUT OF THE TAF SITES TILL 21Z. THIS CONVECTIVE ACTIVITY
IS DIURNALLY DRIVEN SO SHOULD SEE SHRA/TSRA DIMINISH BY 02-04Z.
WINDS ARE TURNING TO THE EAST AND SHOULD STAY THERE THROUGH THE
TAF PERIOD. NO RESTRICTIONS TO VSBYS EXPECTED EXCEPT IN AND AROUND
TSRA DEVELOPMENT.

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

01

&&

.PRELIMINARY POINT TEMPS/POPS...
ATHENS          71  92  71  90 /  40  30  30  40
ATLANTA         74  91  73  88 /  40  30  30  50
BLAIRSVILLE     69  88  68  84 /  40  50  30  50
CARTERSVILLE    70  91  71  89 /  40  40  30  50
COLUMBUS        73  94  73  90 /  20  30  30  50
GAINESVILLE     73  90  73  88 /  40  40  30  50
MACON           71  92  71  90 /  30  30  20  40
ROME            71  92  71  90 /  40  40  30  50
PEACHTREE CITY  71  91  70  89 /  40  30  30  50
VIDALIA         72  93  72  89 /  20  30  20  40

&&

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

SHORT TERM...01
LONG TERM....ARG
AVIATION...01

Hazardous weather outlook, Jul 17, 12:22 PM EDT, 7 hours 19 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1222 PM EDT WED JUL 17 2013

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-181630-
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-
1222 PM EDT WED JUL 17 2013

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

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

...ISOLATED SEVERE THUNDERSTORMS POSSIBLE MAINLY THIS AFTERNOON...

WEATHER HAZARDS EXPECTED...
STRONG GUSTY WINDS...LARGE HAIL AND LIGHTNING.

DISCUSSION...
A MOIST AIRMASS AND AFTERNOON INSTABILITY WILL COMBINE AHEAD OF AN
UPPER LEVEL DISTURBANCE...LEADING TO POTENTIAL ISOLATED SEVERE
THUNDERSTORMS. THE BEST CHANCE FOR SEVERE WEATHER WILL BE NORTH OF
A LINE FROM COLUMBUS TO WARRENTON.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

SCATTERED THUNDERSTORMS CAN BE EXPECTED THROUGH TUESDAY...MOST SO
DURING THE AFTERNOON AND EVENING HOURS. THE MAIN HAZARDS WITH BE
GUSTY WINDS...HEAVY RAIN AND LIGHTNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT.

In the hours before

Local storm report, Jul 17, 6:52 PM EDT, 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
652 PM EDT WED JUL 17 2013

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

0650 PM     HAIL             2 W CONYERS             33.67N 84.05W
07/17/2013  E1.00 INCH       ROCKDALE           GA   PUBLIC

            PUBLIC REPORTED QUARTER SIZE HAIL WEST OF CONYERS ON
            INTERSTATE-20.

&&

LBELANGE

Local storm report, Jul 17, 7:10 PM EDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
710 PM EDT WED JUL 17 2013

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

0650 PM     HAIL             2 ENE AUBURN            34.02N 83.80W
07/17/2013  E1.00 INCH       BARROW             GA   PUBLIC

            PUBLIC REPORTED NICKEL TO QUARTER SIZE HAIL 2 MILES ENE
            OF AUBURN.

&&

LBELANGE

Local storm report, Jul 17, 7:17 PM EDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
717 PM EDT WED JUL 17 2013

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

0645 PM     TSTM WND DMG     10 S WRENS              33.06N 82.39W
07/17/2013                   JEFFERSON          GA   911 CALL CENTER

            COUNTY 911 CENTER REPORTED NUMEROUS POWER LINES AND TREES
            DOWN ACROSS THE COUNTY STARTING AROUND 645 PM.

&&

DDARBE

Local storm report, Jul 17, 7:28 PM EDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
728 PM EDT WED JUL 17 2013

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

0711 PM     HAIL             2 ENE AUBURN            34.02N 83.80W
07/17/2013  E1.00 INCH       BARROW             GA   PUBLIC

            PUBLIC REPORTED NICKEL TO QUARTER SIZE HAIL 2 MILES ENE
            OF AUBURN.

0726 PM     HAIL             3 SE DACULA             33.95N 83.86W
07/17/2013  E1.00 INCH       GWINNETT           GA   PUBLIC

            PUBLIC REPORTED QUARTER SIZE HAIL NEAR HARBIN.

&&

LBELANGE

Local storm report, Jul 17, 7:31 PM EDT, 10 minutes before

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Special weather statement, Jul 17, 7:41 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
741 PM EDT WED JUL 17 2013

GAZ047-180015-
741 PM EDT WED JUL 17 2013

...SIGNIFICANT WEATHER ADVISORY FOR PEA SIZED HAIL AND 40 MPH WINDS
IN WALTON COUNTY UNTIL 815 PM EDT...

AT 740 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER JERSEY...MOVING SOUTHWEST AT 10 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE PEA SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH AS IT MOVES ACROSS
WALTON COUNTY THROUGH 815 PM EDT. SOME LOCATIONS IN THE PATH OF THIS
STORM INCLUDE HERNDONVILLE...NICHOLASVILLE...PANNELL...MONROE...
BETWEEN...YOUTH...WALNUT GROVE...SOCIAL CIRCLE AND JERSEY. HEAVY
DOWNPOURS WILL CAUSE PONDING OF WATER ON ROADWAYS.

&&

LAT...LON 3382 8364 3362 8370 3364 8373 3365 8377
      3375 8392 3389 8377
TIME...MOT...LOC 2341Z 040DEG 7KT 3375 8378

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 2:41 PM EDT	Special Weather Statement	FFC	Bartow	49 min
Jul 17, 3:29 PM EDT	Special Weather Statement	FFC	Cherokee	31 min
Jul 17, 3:40 PM EDT	Special Weather Statement	FFC	Coweta	50 min
Jul 17, 3:42 PM EDT	Flash Flood Warning	FFC	Cherokee, Pickens	6 hr
Jul 17, 4:02 PM EDT	Special Weather Statement	FFC	Fulton	43 min
Jul 17, 4:04 PM EDT	Severe Thunderstorm Warning	FFC	Coweta, Fayette, Fulton	41 min
Jul 17, 4:11 PM EDT	Severe Thunderstorm Warning	FFC	Greene, Oconee, Oglethorpe	49 min
Jul 17, 4:27 PM EDT	Flash Flood Warning	FFC	Coweta, Fulton	6 hr
Jul 17, 4:30 PM EDT	Special Weather Statement	FFC	Pulaski	30 min
Jul 17, 4:41 PM EDT	Severe Thunderstorm Warning	FFC	Fulton	49 min
Jul 17, 4:47 PM EDT	Severe Thunderstorm Warning	FFC	Towns, Union, White	43 min
Jul 17, 4:51 PM EDT	Special Weather Statement	FFC	Lumpkin	39 min
Jul 17, 4:52 PM EDT	Severe Thunderstorm Warning	FFC	Lumpkin, Union	53 min
Jul 17, 4:55 PM EDT	Severe Thunderstorm Warning	FFC	Gilmer, Murray	50 min
Jul 17, 5:01 PM EDT	Severe Thunderstorm Warning	FFC	Clayton, Fayette	44 min
Jul 17, 5:06 PM EDT	Special Weather Statement	FFC	Oglethorpe	24 min
Jul 17, 5:08 PM EDT	Special Weather Statement	FFC	Hall	37 min
Jul 17, 5:15 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb, Fulton	45 min
Jul 17, 5:24 PM EDT	Severe Thunderstorm Warning	FFC	Cobb, Douglas, Paulding	51 min
Jul 17, 5:55 PM EDT	Severe Thunderstorm Warning	FFC	White	50 min
Jul 17, 5:55 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb	50 min
Jul 17, 5:58 PM EDT	Special Weather Statement	FFC	Oglethorpe	32 min
Jul 17, 6:12 PM EDT	Flash Flood Warning	FFC	DeKalb, Fulton, Gwinnett	2 hr
Jul 17, 6:26 PM EDT	Special Weather Statement	FFC	Haralson, Polk	49 min
Jul 17, 6:30 PM EDT	Severe Thunderstorm Warning	FFC	Glascock, Jefferson	45 min
Jul 17, 6:32 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb, Henry, Rockdale	43 min
Jul 17, 6:35 PM EDT	Special Weather Statement	FFC	Greene	25 min
Jul 17, 6:43 PM EDT	Special Weather Statement	FFC	Barrow, Jackson	32 min
Jul 17, 6:45 PM EDT	Special Weather Statement	FFC	Hall	45 min
Jul 17, 6:49 PM EDT	Special Weather Statement	FFC	Macon	26 min
Jul 17, 6:57 PM EDT	Severe Thunderstorm Warning	FFC	Washington	48 min
Jul 17, 6:59 PM EDT	Severe Thunderstorm Warning	FFC	Hancock	46 min
Jul 17, 7:03 PM EDT	Severe Thunderstorm Warning	FFC	Barrow, Gwinnett	27 min
Jul 17, 7:16 PM EDT	Severe Thunderstorm Warning	FFC	Gwinnett	44 min
Jul 17, 7:30 PM EDT	Severe Thunderstorm Warning	FFC	Baldwin, Washington, Wilkinson	45 min
Jul 17, 7:55 PM EDT	Special Weather Statement	FFC	Barrow, Clarke, Gwinnett, Jackson	35 min
Jul 17, 7:57 PM EDT	Special Weather Statement	FFC	Laurens, Treutlen	48 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.