Alert archive / Georgia / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 44, NWS Atlanta, GA

April 20, 2015Cherokee County, Cobb County, Fulton County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 20, 2015, 1:58 PM EDT for Cherokee County, Cobb County, Fulton County, Georgia. It was in force for 47 min. 14 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 20, 2015, 1:58 PM EDT (17:58 UTC)
Expired: Apr 20, 2015, 2:45 PM EDT
In force: 47 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cherokee County, GA, Cobb County, GA, Fulton County, GA

The radar

The Atlanta radar (KFFC), 78 km from the middle of the area, began a volume at 18:01 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.

What was reported inside it

Time	Report	Where	Remark
Apr 20, 2:00 PM EDT	HAIL 1	1 Sw Ridgewood Park, GA
Apr 20, 2:03 PM EDT	HAIL 1.25	1 N Marietta, GA
Apr 20, 2:05 PM EDT	HAIL 1.25	1 S Oakton, GA
Apr 20, 2:08 PM EDT	HAIL 1	Marietta, GA	HAIL WAS GETTING LARGER DURING THE CALL.
Apr 20, 2:10 PM EDT	TSTM WND DMG	Kennesaw, GA	2 TREES DOWN ON ROADWAYS IN KENNESAW
Apr 20, 2:18 PM EDT	TSTM WND DMG	Sandy Springs, GA	TREE DOWN IN NORTH SANDY SPRINGS
Apr 20, 2:20 PM EDT	HAIL 1.75	Roswell, GA	THE HAIL OCCURRED AT HOLCOMB BRIDGE AND 400.
Apr 20, 2:21 PM EDT	TSTM WND DMG	Johns Creek, GA	TREE DOWN IN JOHNS CREEK AREA.
Apr 20, 2:26 PM EDT	TSTM WND DMG	1 Wnw Spalding Hills, GA	TREE DOWN ON THE ROADWAY AT SPAULDING DRIVE AND BALL CREEK WAY
Apr 20, 2:29 PM EDT	HAIL 1	Roswell, GA	TREE LIMBS AND BRANCHES WERE ALSO REPORTED DOWN.
Apr 20, 2:30 PM EDT	HAIL 1	2 Sw Alpha Park, GA
Apr 20, 2:38 PM EDT	TSTM WND DMG	Roswell, GA	LARGE TREE FELL ON HOUSE IN ROSWELL.
Apr 20, 2:40 PM EDT	HAIL 1	Alpharetta, GA	1 INCH HAIL WAS REPORTED ON MANSELL ROAD.
Apr 20, 2:49 PM EDT	HAIL 1.25	1 Nw Newtown, GA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 13 storm reports to this severe thunderstorm warning; the first came 2 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 20, 1:23 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.0 hours before the alert went out and 75 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: 694 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 689 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 222 m²/s²
0-3 km storm-relative helicity: 284 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 4.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

795 
WUUS52 KFFC 201758
SVRFFC
GAC057-067-121-201845-
/O.NEW.KFFC.SV.W.0044.150420T1758Z-150420T1845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
158 PM EDT MON APR 20 2015

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CHEROKEE COUNTY IN NORTH CENTRAL GEORGIA...
  NORTHEASTERN FULTON COUNTY IN NORTH CENTRAL GEORGIA...
  NORTHERN COBB COUNTY IN NORTH CENTRAL GEORGIA...

* UNTIL 245 PM EDT

* AT 157 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER MARIETTA...
  MOVING EAST AT 45 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING AND TREES. 

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MARIETTA...SANDY SPRINGS...ROSWELL...JOHNS CREEK...ALPHARETTA...
  DUNWOODY...MILTON...KENNESAW...WOODSTOCK...ACWORTH...BERKELEY
  LAKE...FAIR OAKS...WHITE WATER PARK...DUE WEST...MOUNT BETHEL...
  KENNESAW STATE UNIVERSITY...SWEAT MOUNTAIN...SANDY PLAINS...DOBBINS
  AIR RESERVE BASE AND BIRMINGHAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

IF YOU SEE WIND DAMAGE...HAIL OR FLOODING...WAIT UNTIL THE STORM HAS
PASSED...AND THEN CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8
6 6 7 6 3 4 4 6 6 OR TWEET US YOUR REPORT AT NWSATLANTA.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT FOR NORTH CENTRAL
GEORGIA.

LAT...LON 3403 8471 3421 8426 3411 8426 3410 8423
      3410 8421 3406 8415 3405 8410 3403 8412
      3403 8417 3399 8419 3399 8420 3400 8422
      3400 8424 3396 8428 3397 8434 3393 8435
      3390 8467
TIME...MOT...LOC 1757Z 253DEG 40KT 3397 8458 

HAIL...1.00IN
WIND...60MPH
 
$$

2 follow-up statements

698 
WWUS52 KFFC 201803
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
203 PM EDT MON APR 20 2015

GAC057-067-121-201845-
/O.CON.KFFC.SV.W.0044.000000T0000Z-150420T1845Z/
CHEROKEE GA-FULTON GA-COBB GA-
203 PM EDT MON APR 20 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR SOUTHEASTERN CHEROKEE...NORTHEASTERN FULTON AND NORTHERN COBB
COUNTIES...

AT 203 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER MARIETTA...
MOVING EAST AT 40 MPH.

HAZARD...60 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING AND TREES. 

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MARIETTA...SANDY SPRINGS...ROSWELL...JOHNS CREEK...ALPHARETTA...
DUNWOODY...MILTON...KENNESAW...WOODSTOCK...ACWORTH...BERKELEY LAKE...
FAIR OAKS...WHITE WATER PARK...DUE WEST...MOUNT BETHEL...KENNESAW
STATE UNIVERSITY...SWEAT MOUNTAIN...SANDY PLAINS...DOBBINS AIR
RESERVE BASE AND BIRMINGHAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

IF YOU SEE WIND DAMAGE...HAIL OR FLOODING...WAIT UNTIL THE STORM HAS
PASSED...AND THEN CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8
6 6 7 6 3 4 4 6 6 OR TWEET US YOUR REPORT AT NWSATLANTA.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT FOR NORTH CENTRAL
GEORGIA.

LAT...LON 3403 8471 3421 8426 3411 8426 3410 8423
      3410 8421 3406 8415 3405 8410 3403 8412
      3403 8417 3399 8419 3399 8420 3400 8422
      3400 8424 3396 8428 3397 8434 3393 8435
      3390 8467
TIME...MOT...LOC 1803Z 255DEG 36KT 3397 8453 

HAIL...1.25IN
WIND...60MPH
 
$$

203 
WWUS52 KFFC 201806
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
206 PM EDT MON APR 20 2015

GAC057-067-121-201845-
/O.CON.KFFC.SV.W.0044.000000T0000Z-150420T1845Z/
CHEROKEE GA-FULTON GA-COBB GA-
206 PM EDT MON APR 20 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR SOUTHEASTERN CHEROKEE...NORTHEASTERN FULTON AND NORTHEASTERN COBB
COUNTIES...

AT 206 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR MARIETTA...
MOVING EAST AT 45 MPH.

HAZARD...60 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING AND TREES. 

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MARIETTA...SANDY SPRINGS...ROSWELL...JOHNS CREEK...ALPHARETTA...
DUNWOODY...MILTON...KENNESAW...WOODSTOCK...BERKELEY LAKE...FAIR
OAKS...WHITE WATER PARK...MOUNT BETHEL...KENNESAW STATE UNIVERSITY...
SWEAT MOUNTAIN...SANDY PLAINS AND BIRMINGHAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

IF YOU SEE WIND DAMAGE...HAIL OR FLOODING...WAIT UNTIL THE STORM HAS
PASSED...AND THEN CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8
6 6 7 6 3 4 4 6 6 OR TWEET US YOUR REPORT AT NWSATLANTA.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT FOR NORTH CENTRAL
GEORGIA.

LAT...LON 3404 8461 3421 8426 3411 8426 3410 8423
      3410 8421 3406 8415 3405 8410 3403 8412
      3403 8417 3399 8419 3399 8420 3400 8422
      3400 8424 3396 8428 3397 8434 3393 8435
      3392 8456
TIME...MOT...LOC 1806Z 253DEG 40KT 3398 8449 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...60MPH
 
$$

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Apr 20, 1:39 PM EDT, 19 minutes earlier.

Area forecast discussion, Apr 20, 1:39 PM EDT, 19 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
139 PM EDT MON APR 20 2015

.UPDATE...
ADDED TORNADO WATCH.

&&

.PREV DISCUSSION... /ISSUED 1022 AM EDT MON APR 20 2015/

UPDATE...
COLD FRONT CURRENTLY STRETCHES FROM THE CENTRAL GREAT LAKES BACK
THROUGH THE MS/AL STATE LINE. A PRE-FRONTAL TROUGH IS SITUATED
ACROSS NORTHERN GA.

MAIN FORECAST ISSUE FOR TODAY WILL BE WHERE AND WHEN CONVECTION
WILL DEVELOP. DRIER AIR HAS SETTLED OVER PORTIONS OF NORTHERN GA
BEHIND THE PRE-FRONTAL TROUGH. DEEP MOISTURE STILL EXISTS OVER THE
SOUTHERN CWFA. MESOANALYSIS SHOWS SB CAPES HAVE STARTED TO
INCREASE MAINLY SOUTH OF INTERSTATE 20. A COUPLED JET STRUCTURE
SHOULD HELP WITH STRONG UPPER DIVERGENCE AND GOOD MID LEVEL ENERGY
SHOULD ALSO HELP SUPPORT ANY CONVECTION. HOWEVER...THE CLOUD COVER
COULD BE A MAJOR STICKING POINT. IF THE CLOUDS CONTINUE TO
THICKEN...THEN HEATING WILL SOMEWHAT INHIBITED. HOWEVER...IF THE
CLOUD COVER IS THIN ENOUGH WITH MANY BREAKS...GOOD HEATING COULD
OCCUR WITH MORE DESTABILIZATION. SO...WILL CONTINUE WITH THE
POSSIBILITY OF SEVERE THUNDERSTORMS ACROSS SOUTHERN PORTIONS OF
THE FORECAST AREA...BUT SEVERE STORMS SHOULD BE MORE ISOLATED IN
NATURE.

HAVE ALSO ADDED SCT/ISOLD ON THE BACKSIDE OF THE FRONT. STEEP
LAPSE RATES COULD HELP TRIGGER ADDITIONAL SHRA/TSRA. THE HRRR
HAS BEEN SHOWING THIS...AND THINK IT IS A REASONABLE SOLUTION.

PREV DISCUSSION... /ISSUED 730 AM EDT MON APR 20 2015/

PREV DISCUSSION... /ISSUED 351 AM EDT MON APR 20 2015/

SHORT TERM /TODAY THROUGH TUESDAY/...

SEVERE THUNDERSTORM WATCH IN EFFECT THROUGH 8AM...

SEVERE WEATHER APPEARS IMMINENT FOR PORTIONS OF NW GEORGIA AS LINE
OF THUNDERSTORMS WITH A HISTORY OF PRODUCING WIND DAMAGE ADVANCES
OUT OF ALABAMA. CAPE VALUES IN THIS REGION HAVE BEEN LARGELY
UNIMPRESSIVE...ESPECIALLY SURFACE BASED CAPE. HOWEVER...ELEVATED
CONVECTION IS MORE READILY AVAILABLE AND CROSS SECTIONS REVEAL
VORTICITY MAXIMA RESPONSIBLE FOR ENHANCED ACTIVITY IS LOW IN THE
ATMOSPHERE THAN WE TYPICALLY SEE...RIGHT AROUND 700 MB IN THIS
SITUATION.

FOLLOWING THE EVOLUTION OF THIS VORT MAX...LOOKS LIKE
THE NORTHERN TIER OF OUR COUNTIES...MAYBE A HALF A DOZEN COUNTIES
OR SO WILL BE UNDER THE THREAT OF SEVERE STORMS THIS MORNING WITH
STRONG WINDS THE PRIMARY CONCERN. CANNOT RULE OUT A TORNADO EITHER
0-1KM HELICITY VALUES CURRENTLY MAXING OUT AT 350 M2/S2 ON LATEST
RAP RUN. ALSO LOOKING AT DOWNDRAFT CAPE AXIS...SHOULD SEE THIS
HOLD TOGETHER OVER THE LOCAL AREA MEANING WINDS SHOULD HAVE NO
PROBLEM MIXING TO THE SURFACE SHOULD STORMS HOLD TOGETHER.

FOR THE REMAINDER OF TODAY...AFOREMENTIONED ACTIVITY SHOULD BEGIN
TO WANE SLIGHTLY AS IT PROGRESSES EAST BUT ENOUGH ACTIVITY WILL
REMAIN TO WARRANT CATEGORICAL TO LIKELY POPS FOR THE NORTHERN
TIER. THEREAFTER...IT WILL DEPEND HOW QUICK LOW CLOUDS CLEAR OUT
AND HOW MUCH RECOVERY WE CAN GET BEFORE FRONT MOVES THROUGH. OF
PARTICULAR INTEREST IS STRONG SHORTWAVE MOVING IN OFF THE GULF
COAST THIS AFTERNOON THAT RESULTS IN DEVELOPMENT OF A STRONG LOW
LEVEL JET AND INFLUX OF DEEP MOISTURE AND INSTABILITY. WILL LIKELY
SEE CAPE VALUES IN EXCESS OF 2500 J/KG SHOULD CLOUDS CLEAR FOR A
LONG ENOUGH TIME FROM GAINESVILLE TO MACON AND POINTS EASTWARD
ALLOWING FOR A SECONDARY SEVERE WEATHER EPISODE. STRONG WINDS WILL
BE THE MAIN CONCERN ONCE AGAIN BUT SIG TO PARAMETER DOES BECOME
ENHANCED AFTER 18Z WITH ISOLATED TORNADOES POSSIBLE AGAIN.

FINALLY QUIETER CONDITIONS EXPECTED TONIGHT THROUGH THE REMAINDER
OF THE SHORT TERM WITH NIL POPS AND COOL OVERNIGHT TEMPS.

DEESE

LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/...

THERE CONTINUE TO BE NOTICEABLE INCONSISTENCIES BETWEEN MODELS...AND
EVEN FROM RUN TO RUN WITHIN EACH MODEL...IN THE EXTENDED FORECAST
PERIOD...SO OVERALL A GENERAL BLEND AND CONCENTRATION ON THE LARGER
SCALE FEATURES WERE USED FOR THE LONG TERM FORECAST GRIDS AGAIN THIS
MORNING.

PERIOD STARTS OUT DRY...BUT MOISTURE RETURN BEGINS WEDNESDAY AS THE
SURFACE RIDGE SLIPS EAST OF THE STATE. WEAK SHORT WAVES IN THE
WESTERLY UPPER FLOW AND A WEAK COLD FRONT BRING AT LEAST A SLIGHT
CHANCE FOR PRECIPITATION BACK INTO THE NORTH BY LATE WEDNESDAY. AMPLE
MOISTURE AND FLAT WESTERLY UPPER FLOW KEEP AT LEAST A SLIGHT CHANCE
FOR PRECIPITATION IN THE FORECAST THURSDAY AND FRIDAY. BETTER
CHANCES FOR RAIN SWEEP BACK IN FOR THE START OF THE WEEKEND AS A
STRONGER SHORT WAVE SWEEPS THROUGH THE REGION. BOTH THE GFS AND THE
ECMWF ARE GENERATING A DECENT SURFACE LOW WITH THIS SHORT WAVE...
HOWEVER THERE ARE SIGNIFICANT DIFFERENCES IN THE TIMING OF THIS LOW
TO KEEP LOW POPS IN THROUGH THE WEEKEND INTO EARLY NEXT WEEK. ENOUGH
INSTABILITY INDICATED WITH THE MID-WEEK SYSTEM FOR A CHANCE OF
THUNDERSTORMS...ALTHOUGH LACK OF STRONG DYNAMICS AND MARGINAL NATURE
OF THE INSTABILITY POINT TO MINIMAL CHANCES FOR SEVERE WEATHER.
WEEKEND SYSTEM CONTINUES TO SHOW MARGINAL INSTABILITY AT BEST...BUT
STRONGER DYNAMICS INDICATE AT LEAST A SLIGHT CHANCE FOR DEEPER
CONVECTION WITH THIS SYSTEM AS WELL.

20

.AVIATION...
18Z UPDATE...
LINE OF TSRA HAVE DEVELOPED ALONG A PRE-FRONTAL TROUGH. EXPECT
THIS ACTIVITY TO LINGER FOR THE NEXT 3-4 HOURS. NOT CONFIDENT HOW
FAR SOUTH THIS LINE WILL MAKE IT DUE TO THE THICKER CLOUD COVER TO
THE SOUTH. CLEARING SHOULD OCCUR AFTER THE FROPA LATER TONIGHT.

//ATL CONFIDENCE...12Z UPDATE...
MEDIUM CONFIDENCE ALL ELEMENTS.

&&

.PRELIMINARY POINT TEMPS/POPS...
ATHENS          76  50  72  48 /  60  20   0   0
ATLANTA         75  52  72  51 /  60  10   0   0
BLAIRSVILLE     71  44  66  44 /  40  30   0   0
CARTERSVILLE    75  46  71  48 /  40  10   0   0
COLUMBUS        79  53  77  53 /  50  10   0   0
GAINESVILLE     75  50  70  49 /  60  10   0   0
MACON           78  52  76  50 /  50  20   0   0
ROME            73  46  72  47 /  30  10   0   0
PEACHTREE CITY  77  49  73  47 /  60  10   0   0
VIDALIA         84  59  77  55 /  50  30   0   0

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
TORNADO WATCH UNTIL 8 PM EDT THIS EVENING FOR THE FOLLOWING
ZONES: BANKS...BARROW...CLARKE...CLAYTON...COBB...COWETA...
DEKALB...DOUGLAS...FAYETTE...FORSYTH...GWINNETT...HALL...HENRY...
JACKSON...MADISON...NEWTON...NORTH FULTON...OCONEE...
OGLETHORPE...PAULDING...ROCKDALE...SOUTH FULTON...WALTON.

&&

Hazardous weather outlook, Apr 20, 11:52 AM EDT, 2 hours 6 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1152 AM EDT MON APR 20 2015

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-211000-
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-
1152 AM EDT MON APR 20 2015

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

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

...STRONG WITH ISOLATED SEVERE STORMS POSSIBLE THIS AFTERNOON
OVER EASTERN SECTIONS...

AN AREA OF SHOWERS AND THUNDERSTORMS IS EXPECTED TO DEVELOP THIS
AFTERNOON ACROSS EAST AND SOUTHEAST SECTIONS OF THE FORECAST
AREA...ROUGHLY FROM A MACON TO GAINESVILLE LINE. THE MAIN THREAT
WILL BE GUSTY AND DAMAGING WINDS BUT ONCE AGAIN CANNOT RULE OUT
AN ISOLATED TORNADO OR LARGE HAIL WITH THIS ACTIVITY.

WITH THE STORMS...OCCASIONALLY HEAVY RAINFALL WILL PRODUCE
LOCALIZED FLOODING. IN ADDITION...A FEW RIVERS AND CREEKS MAY
BEGIN TO FLOW OUT OF THEIR BANKS.

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

THERE IS A CHANCE OF THUNDERSTORMS WEDNESDAY THROUGH THURSDAY AND
AGAIN SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO SUBMIT REPORTS OF SEVERE WEATHER
THROUGH THE WEB BY GOING TO WEATHER.GOV/ATLANTA.

In the hours before

Special weather statement, Apr 20, 1:27 PM EDT, 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
127 PM EDT MON APR 20 2015

GAZ014-021-022-201800-
DAWSON GA-CHEROKEE GA-FORSYTH GA-
127 PM EDT MON APR 20 2015

...SIGNIFICANT WEATHER ADVISORY FOR PENNY SIZED HAIL AND 40 MPH WINDS
IN DAWSON...CHEROKEE AND FORSYTH COUNTIES UNTIL 200 PM EDT...

AT 126 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR CANTON...MOVING EAST AT 35 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE PENNY SIZED SIZED HAIL...
FREQUENT CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH AS IT
MOVES ACROSS DAWSON...CHEROKEE AND FORSYTH COUNTIES THROUGH 200 PM
EDT.

SOME LOCATIONS IN THE PATH OF THIS STORM INCLUDE
CANTON...CUMMING...DAWSONVILLE...WOODSTOCK...HOLLY SPRINGS...BALL
GROUND...BUFFINGTON...FREE HOME...DOUGHERTY...LATHEMTOWN...
HOLBROOK...LEBANON...UNION HILL...WAR HILL PARK...CHESTATEE...DREW...
HICKORY FLAT...MATT...HIGHTOWER AND DUCKTOWN.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT FOR NORTH CENTRAL
GEORGIA.

LAT...LON 3442 8398 3436 8398 3433 8395 3430 8395
      3429 8393 3427 8395 3424 8395 3423 8396
      3414 8426 3419 8426 3419 8433 3417 8436
      3412 8437 3411 8442 3407 8447 3425 8458
      3438 8429 3438 8426 3440 8426 3447 8410
TIME...MOT...LOC 1726Z 248DEG 30KT 3421 8445

Special weather statement, Apr 20, 1:32 PM EDT, 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
132 PM EDT MON APR 20 2015

GAZ080-081-093>095-201800-
MACON GA-TAYLOR GA-CRAWFORD GA-PEACH GA-HOUSTON GA-
132 PM EDT MON APR 20 2015

...SIGNIFICANT WEATHER ADVISORY FOR PEA SIZED HAIL AND 35 MPH WINDS
IN MACON...TAYLOR...CRAWFORD...PEACH AND HOUSTON COUNTIES UNTIL 200
PM EDT...

AT 131 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR MARSHALLVILLE...OR 10 MILES NORTH OF
OGLETHORPE...MOVING NORTHEAST AT 45 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE PEA SIZED SIZED HAIL...
FREQUENT CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 35 MPH AS IT
MOVES ACROSS MACON...TAYLOR...CRAWFORD...PEACH AND HOUSTON COUNTIES
THROUGH 200 PM EDT.

SOME LOCATIONS IN THE PATH OF THIS STORM INCLUDE
PERRY...FORT VALLEY...OGLETHORPE...WARNER ROBINS...CENTERVILLE...
BYRON...MONTEZUMA...MARSHALLVILLE...GARDEN VALLEY...HICKS...
LAKEWOOD...HOUSTON LAKE...BARTLETT...KATHLEEN...MOSS OAK...SAINT
LOUIS...POWERVILLE...MEADOWDALE...NAKOMIS AND WINCHESTER.

LAT...LON 3229 8410 3245 8420 3270 8374 3269 8371
      3247 8357
TIME...MOT...LOC 1731Z 242DEG 37KT 3244 8402

16

Special weather statement, Apr 20, 1:40 PM EDT, 18 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
140 PM EDT MON APR 20 2015

GAZ009-016-201815-
TOWNS GA-WHITE GA-
140 PM EDT MON APR 20 2015

...SIGNIFICANT WEATHER ADVISORY FOR DIME SIZED HAIL AND 40 MPH WINDS
IN TOWNS AND WHITE COUNTIES UNTIL 215 PM EDT...

AT 140 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR UNICOI STATE PARK...OR 11 MILES NORTH OF
CLEVELAND...MOVING EAST AT 35 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE DIME SIZED SIZED HAIL...
FREQUENT CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH AS IT
MOVES ACROSS TOWNS AND WHITE COUNTIES THROUGH 215 PM EDT.

SOME LOCATIONS IN THE PATH OF THIS STORM INCLUDE
HELEN...UNICOI STATE PARK...WHITLEY GAP SHELTER...MOUNTAIN SCENE...
BLUE MOUNTAIN SHELTER...SMITHGALL WOODS CONSERVATION ARE...
ROBERTSTOWN...ANNA RUBY FALLS...LOW GAP SHELTER AND BATESVILLE.

LAT...LON 3488 8366 3483 8366 3482 8365 3480 8368
      3479 8368 3476 8363 3473 8362 3472 8363
      3465 8385 3469 8387 3472 8386 3473 8383
      3478 8383 3479 8378 3485 8380 3490 8362
TIME...MOT...LOC 1740Z 252DEG 31KT 3476 8377

Local storm report, Apr 20, 1:44 PM EDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
144 PM EDT MON APR 20 2015

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

0135 PM     HAIL             1 N MACEDONIA           34.27N  84.36W
04/20/2015  E0.75 INCH       CHEROKEE           GA   PUBLIC

&&

EVENT NUMBER FFC1500229

NLIST

Local storm report, Apr 20, 1:51 PM EDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
151 PM EDT MON APR 20 2015

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

0130 PM     HAIL             2 SE CANTON             34.22N  84.47W
04/20/2015  E0.75 INCH       CHEROKEE           GA   EMERGENCY MNGR

&&

EVENT NUMBER FFC1500230

NLIST

Special weather statement, Apr 20, 1:58 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
158 PM EDT MON APR 20 2015

GAZ080>082-094-201830-
TAYLOR GA-CRAWFORD GA-PEACH GA-BIBB GA-
158 PM EDT MON APR 20 2015

...SIGNIFICANT WEATHER ADVISORY FOR PEA SIZED HAIL AND 35 MPH WINDS
IN TAYLOR...CRAWFORD...PEACH AND BIBB COUNTIES UNTIL 230 PM EDT...

AT 157 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER REYNOLDS...OR 7 MILES EAST OF BUTLER...
MOVING NORTHEAST AT 55 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE PEA SIZED SIZED HAIL...
FREQUENT CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 35 MPH AS IT
MOVES ACROSS TAYLOR...CRAWFORD...PEACH AND BIBB COUNTIES THROUGH 230
PM EDT.

SOME LOCATIONS IN THE PATH OF THIS STORM INCLUDE
FORT VALLEY...BUTLER...ROBERTA...BYRON...REYNOLDS...POTTERVILLE...LEE
POPE...LIZELLA...HORNS...LAKE TOBESOFKEE...FICKLING MILL...
KNOXVILLE...POWERVILLE...NAKOMIS...SANDY POINT AND JACK BROWN
ESTATES.

LAT...LON 3262 8427 3289 8381 3267 8365 3269 8370
      3265 8371 3265 8373 3263 8372 3251 8403
      3252 8405 3251 8411 3246 8416
TIME...MOT...LOC 1757Z 239DEG 48KT 3260 8412

16

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 8:41 PM EDT	Special Weather Statement	FFC	Cherokee, Dawson, Pickens	34 min
Apr 19, 9:30 PM EDT	Special Weather Statement	FFC	Dawson, Lumpkin, White	30 min
Apr 20, 3:57 AM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Chattooga, Dade, Floyd, Walker	48 min
Apr 20, 4:44 AM EDT	Special Weather Statement	FFC	Catoosa, Chattooga, Floyd, Walker, Whitfield	31 min
Apr 20, 5:10 AM EDT	Special Weather Statement	FFC	Bartow, Gordon, Murray	35 min
Apr 20, 5:30 AM EDT	Severe Thunderstorm Warning	FFC	Gilmer, Gordon, Murray	30 min
Apr 20, 5:42 AM EDT	Special Weather Statement	FFC	Bartow, Haralson, Paulding	33 min
Apr 20, 6:03 AM EDT	Special Weather Statement	FFC	Pickens	27 min
Apr 20, 6:07 AM EDT	Special Weather Statement	FFC	Fannin, Towns, Union	23 min
Apr 20, 6:23 AM EDT	Special Weather Statement	FFC	Cherokee	37 min
Apr 20, 6:26 AM EDT	Severe Thunderstorm Warning	FFC	Cherokee, Pickens	20 min
Apr 20, 6:30 AM EDT	Special Weather Statement	FFC	Lumpkin, Towns	30 min
Apr 20, 6:40 AM EDT	Special Weather Statement	FFC	Dawson	35 min
Apr 20, 6:57 AM EDT	Severe Thunderstorm Warning	FFC	White	19 min
Apr 20, 7:00 AM EDT	Special Weather Statement	FFC	Banks, Hall	30 min
Apr 20, 9:55 AM EDT	River Flood Warning	FFC	Johnson, Washington, Wilkinson	4 days
Apr 20, 12:38 PM EDT	Special Weather Statement	FFC	Cherokee, Dawson, Forsyth, Hall, Lumpkin, White	37 min
Apr 20, 12:58 PM EDT	Special Weather Statement	FFC	Stewart, Webster	32 min
Apr 20, 1:00 PM EDT	Severe Thunderstorm Warning	FFC	Dawson, Forsyth, Hall, Lumpkin, White	45 min
Apr 20, 1:08 PM EDT	Special Weather Statement	FFC	Cobb, Paulding	37 min
Apr 20, 1:16 PM EDT	Severe Thunderstorm Warning	FFC	Cobb, Paulding	44 min
Apr 20, 1:27 PM EDT	Special Weather Statement	FFC	Cherokee, Forsyth	33 min
Apr 20, 1:32 PM EDT	Special Weather Statement	FFC	Houston, Macon, Peach	28 min
Apr 20, 1:33 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee, Dawson, Forsyth	42 min
Apr 20, 1:40 PM EDT	Special Weather Statement	FFC	Towns	35 min
Apr 20, 1:58 PM EDT	Special Weather Statement	FFC	Crawford	32 min
Apr 20, 2:01 PM EDT	Special Weather Statement	FFC	Paulding	29 min
Apr 20, 2:07 PM EDT	Tornado Warning	FFC	Cobb, DeKalb, Forsyth, Fulton, Gwinnett	38 min
Apr 20, 2:14 PM EDT	Special Weather Statement	FFC	Hall	31 min
Apr 20, 2:30 PM EDT	Special Weather Statement	FFC	Paulding	15 min
Apr 20, 2:35 PM EDT	Special Weather Statement	FFC	Banks	25 min
Apr 20, 2:44 PM EDT	Tornado Warning	FFC	Barrow, Forsyth, Fulton, Gwinnett, Hall, Jackson	46 min
Apr 20, 2:45 PM EDT	Severe Thunderstorm Warning	FFC	Banks	45 min
Apr 20, 3:09 PM EDT	Special Weather Statement	FFC	Cobb	36 min
Apr 20, 3:18 PM EDT	Tornado Warning	FFC	Banks, Jackson, Madison	42 min
Apr 20, 3:23 PM EDT	Special Weather Statement	FFC	Jasper, Putnam	22 min
Apr 20, 3:28 PM EDT	Special Weather Statement	FFC	Gwinnett	47 min
Apr 20, 4:00 PM EDT	Severe Thunderstorm Warning	FFC	Banks, Madison	15 min
Apr 20, 4:05 PM EDT	Special Weather Statement	FFC	Barrow, Jackson	40 min
Apr 20, 4:13 PM EDT	Severe Thunderstorm Warning	FFC	Barrow, Clarke, Jackson, Madison	47 min
Apr 20, 4:25 PM EDT	Special Weather Statement	FFC	Oglethorpe	20 min
Apr 20, 4:55 PM EDT	Severe Thunderstorm Warning	FFC	Madison	35 min
Apr 20, 5:42 PM EDT	Special Weather Statement	FFC	Clarke	33 min
Apr 20, 5:46 PM EDT	Severe Thunderstorm Warning	FFC	Madison	14 min
Apr 20, 5:58 PM EDT	Severe Thunderstorm Warning	FFC	Clarke, Madison, Oconee, Oglethorpe	47 min
Apr 20, 6:45 PM EDT	Special Weather Statement	FFC	Clarke, Oglethorpe	30 min
Apr 20, 7:10 PM EDT	Severe Thunderstorm Warning	FFC	Oglethorpe, Wilkes	50 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2015 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.