Special Weather Statement, NWS Atlanta, GA

Area Forecast Discussion...Updated for Aviation
National Weather Service Peachtree City GA
140 PM EDT Tue Jun 20 2017

.Update...have increasd pops across a portion of north and central
GA based on radar. No changes for now.

41

.PREV DISCUSSION... /Issued 318 AM EDT Tue Jun 20 2017/

SHORT TERM /Today through Wednesday/...
A convergence zone has set up from roughly Frolona (Heard County) to
Union City (Fulton County) to Danburg (Wilkes County). Overnight
along this line, widespread 1" to 3" of rain has fallen with some
spotty 4" to 6" totals noted. So, this area has been primed for
flooding if additional rain falls. All of the hi-res models show that
the convergence zone will hang around the same area through tonight,
potentially moving a little north or south at times. Forecasted QPF
calls for another 1" to 2" today, and there will be some locally
higher amounts. Will go ahead and issue a Flash Flood Watch across
the central CWFA to account for these additional rains through
tonight.

On and off showers and thunderstorms are expected today for most of
the outlook area. Precipitation will be a lot more spotty across the
far NW higher terrain, as somewhat drier air has settled across the
area. For the remainder of the CWFA, a very moist and tropical
airmass will remain in place through the short term period. PWATS
aoa 2" will be the rule. The old boundary/convergence area will serve
to focus precipitation today. However, within the most/tropical
airmass, convection will be able to develop almost anywhere south of
this feature. Models continue to indicate high pops, so have gone at
least likely.

Wednesday looks to be very similar to today, but the axis of
heaviest precip may shift a bit southward.

With so much cloud cover and precip around, max temps will be below
normal for the period.

NListemaa

LONG TERM /Wednesday Night through Monday/...
The long term portion of the forecast will remain unsettled.

The old boundary/convergence zone will remain a focus for precip
through Wednesday night across the southern CWFA. The old boundary
should begin to shift northward by Thursday as a potential tropical
cyclone makes landfall across the western Gulf Coast. The boundary
looks to set up across far northern GA on Thursday and remains
nearly stationary through the early week. The remnants of any
tropical system should move east along the boundary during the
weekend/early next week. Another flood watch may be needed during
the extended period for northern portions of GA as the remnants
impact the area.

High pressure, and drier air should finally settle across the area
by the middle of next week.

NListemaa

&&

.AVIATION...
18Z Update...

A convergence line near ATL should remain in place most of the
day, possibly shifting slightly north/slightly south through
tonight. Showers/thunderstorms persisting throught most of the
night with the low pressure developing in the Gulf. Ceilings
should vary this afternoon...but expect mostly mvfr varying to
IFR.  Widespread IFR overnight. Winds will be tricky...and can
go either side of south.

//ATL Confidence...18Z Update...
Medium confidence all elements.

41

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          79  68  80  69 /  60  60  40  40
Atlanta         79  69  79  70 /  60  50  40  50
Blairsville     79  63  78  65 /  50  50  30  40
Cartersville    82  68  81  70 /  50  40  40  40
Columbus        78  71  81  73 /  80  70  60  50
Gainesville     79  67  79  68 /  50  50  40  40
Macon           79  70  81  72 /  80  70  60  40
Rome            84  69  82  70 /  20  20  30  40
Peachtree City  78  68  79  70 /  70  60  40  50
Vidalia         82  72  83  73 /  80  70  60  30

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
Flash Flood Watch through Wednesday morning for the following
zones: Baldwin...Barrow...Butts...Carroll...Clarke...Clayton...
Cobb...Coweta...DeKalb...Douglas...Fayette...Greene...Gwinnett...
Hancock...Haralson...Harris...Heard...Henry...Jackson...Jasper...
Jones...Lamar...Madison...Meriwether...Monroe...Morgan...
Newton...North Fulton...Oconee...Oglethorpe...Paulding...Pike...
Putnam...Rockdale...South Fulton...Spalding...Talbot...
Taliaferro...Troup...Upson...Walton...Warren...Wilkes.

&&

Hazardous Weather Outlook
National Weather Service Peachtree City GA
336 PM EDT Tue Jun 20 2017

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-211945-
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-
336 PM EDT Tue Jun 20 2017

This Hazardous Weather Outlook is for portions of North and Central Georgia.

.DAY ONE...This Afternoon and Tonight...

Very heavy rainfall and isolated thunderstorms are expected this
afternoon and through tonight. The main severe weather hazard is
flooding from locally heavy rainfall. A Flash Flood Watch aligned roughly
along the Interstate 20 corridor will remain in effect through
tonight . Areas within the Flood Watch are expected to receive
between 1 and 3 inches of rainfall...with locally higher amounts
possible.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday...

There is a chance of thunderstorms each day. The primary hazard will
be very heavy rainfall as ample moisture from the remnants of Tropical
Storm Cindy interacts with another cold front over the region.
Other threats include gusty winds and frequent lightning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not requested but spotters are encouraged to
submit reports of severe weather or flooding through the web by going
to weather.gov/atlanta.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
301 PM EDT TUE JUN 20 2017

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

0250 PM     FLASH FLOOD      MECHANICSVILLE          33.93N  84.24W
06/20/2017                   GWINNETT           GA   PUBLIC

            THE PARKING LOT OF 6875 MIMMS ROAD IS FLOODED WITH SOME
            CARS SUBMERGED.

&&

EVENT NUMBER FFC1700876

LMERRITT

Special Weather Statement
National Weather Service Peachtree City GA
314 PM EDT TUE JUN 20 2017

GAZ034-035-202000-
Barrow GA-Gwinnett GA-
314 PM EDT TUE JUN 20 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BARROW AND GWINNETT
COUNTIES UNTIL 400 PM EDT...

At 314 PM EDT...a line of strong thunderstorms was along a line
extending from near Carl to Auburn to near Lilburn. These storms were
nearly stationary.

  HAZARD...Heavy rain.

  IMPACT...Heavy rain may cause temporary street flooding especially
           in poor drainage areas.

Some locations in the path of these storms include
Lawrenceville, Duluth, Sugar Hill, Snellville, Suwanee, Buford,
Auburn, Dacula, Grayson, Rest Haven, Harbin, Buford Dam-Lake Lanier
Parks, Rosebud and Hog Mountain.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Motorists should slow down and be prepared for possible loss of
control due to hydroplaning.

LAT...LON 3411 8390 3393 8380 3379 8398 3400 8418
      3403 8417 3403 8412 3405 8410 3407 8412
      3410 8411 3411 8410 3415 8408 3417 8406
TIME...MOT...LOC 1914Z 031DEG 0KT 3402 8386 3402 8385 3394 8412

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
315 PM EDT TUE JUN 20 2017

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

0237 PM     FLASH FLOOD      1 SE NORTH ATLANTA      33.86N  84.32W
06/20/2017                   DEKALB             GA   PUBLIC

            FLOODING WAS REPORTED IN THE DREW VALLEY NEIGHBORHOOD
            SPECIFICALLY ON COVE CIRCLE AND BURCH CIRCLE.

&&

EVENT NUMBER FFC1700877

LMERRITT

Special Weather Statement
National Weather Service Peachtree City GA
317 PM EDT TUE JUN 20 2017

GAZ034-045-202000-
DeKalb GA-Gwinnett GA-
317 PM EDT TUE JUN 20 2017

...SIGNIFICANT WEATHER ADVISORY FOR DEKALB AND SOUTHWESTERN GWINNETT
COUNTIES UNTIL 400 PM EDT...

At 317 PM EDT...a strong thunderstorm was over Belvedere Park, or
over Decatur...moving east at 10 mph.

  HAZARD...Heavy rain.

  IMPACT...Heavy rain may cause temporary street flooding especially
           in poor drainage areas.

Some locations in the path of this storm include
Atlanta, Decatur, Lilburn, Clarkston, Stone Mountain, Avondale
Estates, Lithonia, Pine Lake, Tucker, Belvedere Park, North Decatur,
Candler-Mcafee, Druid Hills, North Druid Hills, Mountain Park,
Belmont, Arabia Mountain, East Lake, Little Five Points and
Snapfinger.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Motorists should slow down and be prepared for possible loss of
control due to hydroplaning.

LAT...LON 3379 8435 3394 8411 3375 8403 3372 8406
      3364 8410 3365 8435
TIME...MOT...LOC 1917Z 265DEG 7KT 3376 8427

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
330 PM EDT TUE JUN 20 2017

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

0310 PM     FLASH FLOOD      MAYFAIR                 33.81N  84.37W
06/20/2017                   FULTON             GA   BROADCAST MEDIA

            FLOODING WAS REPORTED ON THE BUFORD CONNECTOR HEADING
            TOWARDS ARMOUR DRIVE AND MONROE DRIVE.

&&

EVENT NUMBER FFC1700878

LMERRITT

Special Weather Statement
National Weather Service Peachtree City GA
338 PM EDT TUE JUN 20 2017

GAZ032-033-044-202030-
North Fulton GA-Cobb GA-South Fulton GA-
338 PM EDT TUE JUN 20 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTH FULTON...SOUTHERN COBB AND
NORTHEASTERN SOUTH FULTON COUNTIES UNTIL 430 PM EDT...

At 337 PM EDT...a line of strong thunderstorms was along a line
extending from near Powder Springs to West End. These storms were
nearly stationary.

  HAZARD...Heavy rain.

  IMPACT...Heavy rain may cause temporary street flooding especially
           in poor drainage areas.

Some locations in the path of these storms include
Atlanta, Marietta, Smyrna, East Point, College Park, Powder Springs,
Austell, Hapeville, Fair Oaks, Grant Park-Zoo Atlanta, Lithia
Springs, Vinings, Sweet Auburn, Cascade Heights, Lakewood Park,
Mableton, West End, Virginia Highland, Turner Field and Jim R Miller
Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Motorists should slow down and be prepared for possible loss of
control due to hydroplaning.

LAT...LON 3390 8472 3398 8461 3397 8455 3390 8445
      3382 8446 3377 8438 3379 8435 3365 8435
      3365 8444 3377 8460 3380 8462 3380 8466
      3386 8473
TIME...MOT...LOC 1937Z 047DEG 0KT 3387 8465 3376 8442