Alert archive / Georgia / Special Weather Statements in 2015

Special Weather Statement, NWS Atlanta, GA

August 17, 2015Lumpkin County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 17, 2015, 4:18 PM EDT for Lumpkin County, Georgia. It was in force for 57 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: Aug 17, 2015, 4:18 PM EDT (20:18 UTC)
Expired: Aug 17, 2015, 5:15 PM EDT
In force: 57 min
Issued by: NWS Atlanta, GA

County Lumpkin County, GA

The radar

The Atlanta radar (KFFC), 146 km from the middle of the area, began a volume at 20:20 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, 8.3 hours before the alert went out and 144 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: 371 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 663 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 78 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 Aug 17, 3:24 PM EDT, 54 minutes earlier.

Area forecast discussion, Aug 17, 3:24 PM EDT, 54 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
324 PM EDT MON AUG 17 2015

.SHORT TERM /TONIGHT THROUGH TUESDAY NIGHT/...
AN ACTIVE SOUTHWEST FLOW ALOFT WILL CONTINUE TO INTERACT WITH VERY
MOIST AND MODERATELY UNSTABLE ENVIRONMENT TO PRODUCE SCATTERED TO
NUMEROUS SHOWERS AND THUNDERSTORMS THROUGH THE SHORT TERM. ALTHOUGH
NO SEVERE STORMS ARE EXPECTED WITH SUCH A DEEP MOIST ENVIRONMENT
WITH LITTLE WIND SHEAR... A FEW STRONG STORMS ARE POSSIBLE ACROSS
MAINLY CENTRAL GEORGIA DURING THE AFTERNOON AND EARLY EVENING HOURS
WHERE TEMPS ARE ABLE TO CLIMB INTO THE UPPER 80S TO LOWER 90S THIS
AFTERNOON AND AGAIN TUESDAY AFTERNOON. THE MOIST TROPICAL AIRMASS
WILL RESULT IN MAINLY SCATTERED SHOWERS TONIGHT AND TUESDAY NIGHT...
BUT CANNOT RULE OUT A FEW RUMBLES OF THUNDER OVERNIGHT. THE MAIN
CONVECTIVE CONCERN IS THE POTENTIAL FOR LOCALLY HEAVY RAIN AS ANY
TRAINING OF STORMS COULD DUMP AROUND 2-3 INCHES IN A SHORT PERIOD OF
TIME... RESULTING IN THE PONDING OF WATER ACROSS LOW FLYING... FLOOD
PRONE AREAS. A FEW FLASHY CREEKS COULD BRIEFLY COME OUT OF THEIR
BANKS... BUT FOR FOR THE MOST PART... NOTHING WIDESPREAD IS EXPECTED
AS MOST STREAMS AND RIVERS COULD USE THE RAIN.

OTHERWISE... AMPLE CLOUDS AND RAIN CHANCES SUGGEST LEANING TOWARD
SLIGHTLY WARMER LOWS AND COOLER HIGHS THROUGH THE SHORT TERM. A
BLEND OF THE WARMER MAV LOWS AND COOLER MET HIGHS WITH PERSISTENCE
LOOKED REASONABLE.

39

.LONG TERM /WEDNESDAY THROUGH MONDAY/...
MINOR CHANGES MADE TO TEMPS IN THE EXTENDED BUT OTHERWISE
CONTINUED WET PATTERN IN STORE THROUGH DAY 7. DEEP MOISTURE
ASSOCIATED WITH SW FLOW ALOFT WILL BE ACROSS THE AREA TO START THE
LONG TERM WITH RATHER HIGH SHOWER AND THUNDERSTORM CHANCES
WEDNESDAY AND THURSDAY. UPPER RIDGE STAYS PARKED OVER FLORIDA AND
THE GULF OF MEXICO PUTTING GA IN VERY MOIST SOUTHWESTERLY FLOW
THROUGH THE END OF THE WORK WEEK. THIS MOIST FLOW WILL BE
ENHANCED WITH A FEW WAVES MOVING THROUGH BUT THE MAJORITY OF THE
PRECIPITATION WILL BE DIURNALLY DRIVEN. THINGS WEAKEN A BIT
TOWARDS THE WEEKEND AS THE MAIN UPPER LEVEL RIDGE BEGINS TO WEAKEN
AND MOVE WEST PUTTING GA IN MORE WEST TO NORTHWESTERLY FLOW
AROUND THE TOP SIDE OF THE RIDGE. THE FLOW REMAINS MOIST...BUT
WITH OUT A DIRECT GULF CONNECTION. PRECIPITABLE WATERS TODAY
THROUGH FRIDAY STAY IN THE 2 INCH RANGE THEN SLACK OFF A BIT INTO
THE WEEKEND INTO THE 1 TO 1.5 INCH RANGE. TEMPS EXPECTED TO STAY
IN THE 60S AND 70S FOR LOWS AND 80S TO 90S FOR HIGHS THROUGH THE
SHORT TERM.

01

&&

.AVIATION...
18Z UPDATE...
A MOIST AND UNSTABLE PATTERN WILL RESULT IN SCATTERED TO NUMEROUS
SHOWERS WITH EMBEDDED THUNDERSTORMS AT TIMES TO PREVAIL THROUGH THE
EVENING... WITH SPOTTY SHOWERS CONTINUING OVERNIGHT. CONVECTION
BECOMES MORE NUMEROUS AGAIN ON TUE WITH DAYTIME HEATING. VFR CIGS
WILL PREVAIL THIS AFTERNOON AND EVENING... THEN IFR/MVFR CIGS SETTLE
BACK IN TONIGHT AROUND 08-10Z TUE AND PERSIST THROUGH 17-18Z TUE
WHEN THEY SHOULD IMPROVE TO VFR LEVELS WITH SOME HEATING. WINDS WILL
DANCE BETWEEN SSE AND SSW THIS AFTERNOON AND MAYBE THIS EVENING
BEFORE SETTLING OUT AT SSW BY 08-10Z TUE. SPEEDS MAINLY 8KTS OR
LESS.

//ATL CONFIDENCE...
18Z UPDATE...
MEDIUM ON TIMING OF TSRA THIS AFTERNOON AND MVFR CIGS TONIGHT.
HIGH ON REMAINING ELEMENTS

39

&&

.PRELIMINARY POINT TEMPS/POPS...
ATHENS          72  85  72  87 /  70  70  60  60
ATLANTA         73  85  73  86 /  70  70  60  60
BLAIRSVILLE     66  78  67  80 /  80  70  60  70
CARTERSVILLE    70  84  71  85 /  80  70  60  70
COLUMBUS        73  88  75  89 /  60  70  60  60
GAINESVILLE     71  82  72  83 /  70  70  60  60
MACON           73  88  74  90 /  60  70  60  60
ROME            71  84  72  85 /  80  70  60  70
PEACHTREE CITY  72  85  72  86 /  70  70  60  60
VIDALIA         73  90  74  90 /  50  70  40  60

&&

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

SHORT TERM...39
LONG TERM....01
AVIATION...39

Hazardous weather outlook, Aug 17, 3:52 PM EDT, 26 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
352 PM EDT MON AUG 17 2015

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-182000-
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-
352 PM EDT MON AUG 17 2015

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

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

NUMEROUS TO WIDESPREAD SHOWERS AND THUNDERSTORMS ARE EXPECTED
TO CONTINUE THROUGH TONIGHT...OVER NORTH AND CENTRAL GEORGIA. A
FEW STRONG STORMS WILL BE POSSIBLE THIS AFTERNOON AND EVENING.

WEATHER HAZARDS EXPECTED...
HEAVY RAINFALL WITH PONDING OF WATER ON ROADWAYS...GUSTY WINDS AND
LIGHTNING.

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

SHOWER AND THUNDERSTORM CHANCES WILL CONTINUE THROUGH SUNDAY.
HEAVY RAINFALL...GUSTY WINDS AND LIGHTNING WILL BE THE LIKELY HAZARDS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT.

In the hours before

Special weather statement, Aug 17, 1:15 PM EDT, 3 hours 3 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
115 PM EDT MON AUG 17 2015

GAZ002-003-171815-
CATOOSA GA-WALKER GA-
115 PM EDT MON AUG 17 2015

...SIGNIFICANT WEATHER ADVISORY FOR CATOOSA AND WALKER COUNTIES UNTIL
215 PM EDT...

AT 110 PM EDT...RAINFALL AMOUNTS AROUND TWO INCHES HAVE FALLEN OVER
PORTIONS OF WALKER AND CATOOSA COUNTIES SINCE 800 AM EDT THIS MORNING.
SHOWERS WITH HEAVY RAIN FROM LAFAYETTE TO RINGGOLD CONTINUE TO MOVE NORTH
TO NORTHEAST AT 30 MPH. THESE SHOWERS MAY PRODUCE ANOTHER INCH OF RAIN
THROUGH 200 PM EDT. SEVERAL CREEKS AND SMALL STREAMS WILL BE RISING
DURING THE NEXT FEW HOURS.

  HAZARD...HEAVY RAIN.

  IMPACT...LOCALIZED FLOODING IN LOW LYING AND POOR DRAINAGE AREAS
           IS LIKELY. MOTORISTS SHOULD SLOW DOWN AND BE PREPARED FOR
           POSSIBLE LOSS OF CONTROL DUE TO HYDROPLANING. WHEN WATER
           COVERS THE ROAD...REMEMBER TO TURN AROUND DON'T DROWN.

SOME LOCATIONS IN THE PATH OF THIS STORM INCLUDE
LAFAYETTE...RINGGOLD...FORT OGLETHORPE...CHICKAMAUGA...CHATTANOOGA
VALLEY...LA FAYETTE...NAOMI...CHATTANOOGA  VALLEY...GRAYSVILLE...BLUE
SPRING...BOYNTON...NOBLE...CENTER POST...BEAUMONT...INDIAN SPRINGS...
ROCK SPRING...LINWOOD...FAIRVIEW...WOOD STATION AND LAKEVIEW.

LAT...LON 3498 8509 3476 8515 3473 8517 3472 8516
      3459 8519 3460 8544 3498 8534
TIME...MOT...LOC 1710Z 203DEG 27KT 3471 8519

16

Special weather statement, Aug 17, 4:18 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
418 PM EDT MON AUG 17 2015

GAZ015-016-172115-
LUMPKIN GA-WHITE GA-
418 PM EDT MON AUG 17 2015

...SIGNIFICANT WEATHER ADVISORY FOR LUMPKIN AND SOUTHWESTERN WHITE
COUNTIES UNTIL 515 PM EDT...

AT 417 PM EDT...A STRONG THUNDERSTORM WAS OVER DAHLONEGA...MOVING
NORTHEAST AT 20 MPH.

  HAZARD...HEAVY RAIN.

  IMPACT...LOCALIZED FLOODING IN LOW LYING AND POOR DRAINAGE AREAS
           IS LIKELY. TEMPORARY STREET FLOODING IS ALSO POSSIBLE.
           MOTORISTS SHOULD SLOW DOWN AND BE PREPARED FOR POSSIBLE
           LOSS OF CONTROL DUE TO HYDROPLANING. WHEN WATER COVERS
           THE ROAD...REMEMBER TO TURN AROUND DON'T DROWN.

SOME LOCATIONS IN THE PATH OF THIS STORM INCLUDE
DAHLONEGA...CLEVELAND...QUALATCHEE LAKE...GOOCH MOUNTAIN SHELTER...
PORTER SPRINGS...AURARIA...CAMP MERRILL...TURNERS CORNER...GARLAND...
NIMBLEWILL AND CAMP COLEMAN LAKE.

LAT...LON 3460 8372 3447 8392 3447 8393 3446 8393
      3442 8399 3450 8415 3454 8419 3460 8419
      3466 8412 3465 8410 3466 8407 3464 8404
      3467 8403 3468 8399 3472 8398 3474 8394
TIME...MOT...LOC 2017Z 231DEG 16KT 3455 8398

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 17, 1:15 PM EDT	Special Weather Statement	FFC	Catoosa, Walker	60 min
Aug 17, 4:39 PM EDT	Special Weather Statement	FFC	Meriwether	51 min
Aug 17, 5:25 PM EDT	Special Weather Statement	FFC	Clayton, Coweta, Fayette	50 min
Aug 17, 6:17 PM EDT	Special Weather Statement	FFC	Clayton, DeKalb, Fulton	43 min
Aug 17, 6:40 PM EDT	Special Weather Statement	FFC	DeKalb, Gwinnett	50 min
Aug 17, 7:04 PM EDT	Special Weather Statement	FFC	Bartow, Cherokee, Pickens	41 min
Aug 17, 7:12 PM EDT	Special Weather Statement	FFC	Newton, Rockdale, Walton	48 min
Aug 17, 7:27 PM EDT	Special Weather Statement	FFC	Forsyth	48 min
Aug 17, 7:31 PM EDT	Special Weather Statement	FFC	Gwinnett	44 min
Aug 17, 7:33 PM EDT	Special Weather Statement	FFC	Telfair, Wheeler	27 min
Aug 17, 7:35 PM EDT	Severe Thunderstorm Warning	FFC	Barrow, Gwinnett, Jackson, Walton	40 min
Aug 17, 7:43 PM EDT	Special Weather Statement	FFC	Gilmer, Pickens	47 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.