Special Weather Statement, NWS Atlanta, GA

Area Forecast Discussion
National Weather Service Peachtree City GA
742 AM EDT Thu Jun 28 2018

.PREV DISCUSSION... /Issued 440 AM EDT Thu Jun 28 2018/

SHORT TERM /Today through Friday/...

Current radar loop shows some isolated showers and thunderstorms
continuing to move SE out of TN and moving across the CWA. These
storms are weakening and moving slowly SE, but they dont seem to be
diminishing as fast as earlier thought. As these storms move further
south they will be moving into areas that were worked over by the
earlier convection so they should diminish with in the next few
hours.  As for the forecast...The upper level ridge is still
building but it has become more centered over the northwestern Gulf
and eastern TX. This has allowed a broad upper level trough to dig
into the southeastern and mid atlantic states, with very little
movement expected over the next few days. This pattern puts GA right
into the Northwesterly flow with impulses continuing to ride over
the ridge center and right into our area. These waves will help to
produce diurnally driven showers and thunderstorms Today and Friday.
Expecting scattered coverage with storms today and tomorrow with a
marginal chance of any storms becoming severe. The greatest threats
will be gusty winds, heavy rain, frequent lightning, and some hail.

Temperatures will continue to stay on the warm side with heat index
values across central GA expected around 100-103. For now not
planning to issue another heat advisory for today as it requires
heat index values of 105 or higher. Will keep a close eye on things
and update as needed.

01

LONG TERM /Friday Night through Wednesday/...

The upper ridge will be centered east of the MS River at the start
of the period. The ridge gets shifted east somewhat late in the
weekend as an upper trough deepens into the Great Lakes...although
the ridge rebounds towards the end of the period. A weak low
pressure area persists in the vicinity of the northern Gulf and
meanders around that area through Wednesday. In general...our
forecast area will be dominated by mainly diurnal showers and
thunderstorms each day. A few thunderstorms may last all night and
have kept at least a slight chance in for each overnight period.
Have shown some higher pops for portions of central GA Sunday and
Monday due to the effects of the northern Gulf low. GFS and ECMWF
seem to show a strengthening of the low during that time frame. No
big changes to the temperature trend.

41

&&

.AVIATION...
12Z Update...
Mostly VFR ceilings but SHRA/TSRA is moving in rapidly and things
will be changing soon. This first round of precip will move
through over the next few hours but another round is expected to
push south out of TN later this afternoon bringing more SHRA/TSRA
to the TAF sites. Ceilings will be up and down today but should
stay in the MVFR to VFR range. VSBYs will do the same. Winds
will start out of the SW and turn slowly to the NW through
tonight. Winds will continue to turn to the NE through Friday
morning. Wind speeds will stay 10kt or less except some gust to
25kt in ad around any stronger storms today.

//ATL Confidence...12Z Update...
Medium to high on all elements

01

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          92  72  94  73 /  50  30  30  20
Atlanta         91  73  92  74 /  60  40  30  10
Blairsville     85  65  88  67 /  60  30  30  20
Cartersville    90  70  92  72 /  70  40  30  10
Columbus        94  74  93  75 /  70  50  40  30
Gainesville     89  71  92  73 /  50  30  20  20
Macon           94  73  94  74 /  60  50  40  30
Rome            91  70  92  72 /  60  40  30  10
Peachtree City  91  71  92  73 /  60  40  30  20
Vidalia         94  74  93  75 /  60  50  50  30

&&

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

SHORT TERM...01
LONG TERM....41
AVIATION...01

Hazardous Weather Outlook
National Weather Service Peachtree City GA
452 AM EDT Thu Jun 28 2018

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-290900-
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-
452 AM EDT Thu Jun 28 2018

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

.DAY ONE...Today and Tonight...

Scattered to numerous showers and thunderstorms are expected today
into this evening. Strong thunderstorms are likely, but a few
severe thunderstorms are not out of the question. Any severe
thunderstorm that develops will have the potential to produce
damaging wind gusts, frequent lightning strikes and locally heavy
rainfall. An isolated brief tornado cannot be ruled out. The most
likely time for strong to severe storms would be this afternoon
and evening, however a few storms could last overnight.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday...

There is a chance of thunderstorms each day for the rest of the
time period through the middle of next week, mainly during the
afternoon and evening hours with few storms becoming strong to
severe each day with gusty winds, frequent lightning and isolated
flooding from heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed through tonight.

Special Weather Statement
National Weather Service Peachtree City GA
644 AM EDT THU JUN 28 2018

GAZ013>016-021>023-033-281115-
Hall GA-Dawson GA-North Fulton GA-Cherokee GA-Forsyth GA-Pickens GA-
White GA-Lumpkin GA-
644 AM EDT THU JUN 28 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN HALL...DAWSON...
NORTH FULTON...CHEROKEE...FORSYTH...SOUTHEASTERN PICKENS...SOUTHERN
WHITE AND LUMPKIN COUNTIES UNTIL 715 AM EDT...

At 642 AM EDT...a line of strong thunderstorms was along a line
extending from near Gooch Mountain Shelter to near Bridgemill...and
moving east at 30 mph.

  HAZARD...Heavy rain...up to 40 mph wind...and frequent cloud to
           ground lightning

  IMPACT...Expect minor damage to tree limbs and blowing around of
           light...unsecured objects. Heavy rain may cause temporary
           street flooding especially in poor drainage areas.

Some locations in the path of these storms include
Gainesville, Canton, Cumming, Dahlonega, Cleveland, Dawsonville,
Sandy Springs, Roswell, Johns Creek, Alpharetta, Milton, Duluth,
Woodstock, Sugar Hill, Holly Springs, Oakwood, Lula, Ball Ground,
Nelson and Clermont.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. If you can hear
thunder...you are close enough to be struck by lightning. Motorists
should slow down and be prepared for possible loss of control due to
hydroplaning.

LAT...LON 3453 8363 3451 8367 3444 8362 3415 8400
      3417 8406 3410 8411 3406 8411 3399 8420
      3400 8424 3396 8428 3397 8433 3402 8440
      3407 8442 3407 8447 3421 8466 3425 8465
      3470 8397
TIME...MOT...LOC 1042Z 276DEG 26KT 3460 8404 3422 8454

WIND...40MPH

Special Weather Statement
National Weather Service Peachtree City GA
714 AM EDT THU JUN 28 2018

GAZ014>016-021>025-032>035-045-281145-
Banks GA-Dawson GA-Forsyth GA-Gwinnett GA-White GA-Lumpkin GA-
Hall GA-Jackson GA-North Fulton GA-Barrow GA-Cobb GA-Cherokee GA-
DeKalb GA-
714 AM EDT THU JUN 28 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BANKS...SOUTHEASTERN
DAWSON...FORSYTH...GWINNETT...SOUTHWESTERN WHITE...SOUTHERN
LUMPKIN...HALL...NORTHWESTERN JACKSON...NORTH FULTON...NORTHWESTERN
BARROW...NORTHEASTERN COBB...SOUTHERN CHEROKEE AND WESTERN DEKALB
COUNTIES UNTIL 745 AM EDT...

At 714 AM EDT...a line of strong thunderstorms was along a line
extending from near Garland to Marietta...and moving south at 20 mph.

  HAZARD...Up to 40 mph wind...frequent cloud to ground lightning
           and heavy rain.

  IMPACT...Expect minor damage to tree limbs and blowing around of
           light...unsecured objects. Heavy rain may cause temporary
           street flooding especially in poor drainage areas.

Some locations in the path of these storms include
Atlanta, Marietta, Gainesville, Lawrenceville, Canton, Decatur,
Cumming, Dahlonega, Cleveland, Dawsonville, Homer, Sandy Springs,
Roswell, Johns Creek, Alpharetta, Dunwoody, Milton, Duluth, Woodstock
and Sugar Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. If you can hear
thunder...you are close enough to be struck by lightning. Motorists
should slow down and be prepared for possible loss of control due to
hydroplaning.

LAT...LON 3446 8364 3444 8362 3444 8361 3431 8347
      3368 8428 3412 8463 3467 8386
TIME...MOT...LOC 1114Z 348DEG 22KT 3454 8384 3396 8455

WIND...40MPH

Special Weather Statement
National Weather Service Peachtree City GA
750 AM EDT THU JUN 28 2018

GAZ014-021>025-027-033>035-045>047-281215-
Banks GA-Dawson GA-Walton GA-Rockdale GA-Forsyth GA-Gwinnett GA-
Madison GA-Hall GA-Jackson GA-North Fulton GA-Barrow GA-Cherokee GA-
DeKalb GA-
750 AM EDT THU JUN 28 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN BANKS...SOUTHEASTERN
DAWSON...NORTHWESTERN WALTON...ROCKDALE...FORSYTH...GWINNETT...
NORTHWESTERN MADISON...HALL...JACKSON...NORTH FULTON...BARROW...
SOUTHEASTERN CHEROKEE AND DEKALB COUNTIES UNTIL 815 AM EDT...

At 750 AM EDT...a line of strong thunderstorms was along a line
extending from near Gillsville to Chamblee...and moving southeast at
20 mph.

  HAZARD...Up to 40 mph wind...frequent cloud to ground lightning
           and heavy rain.

  IMPACT...Expect minor damage to tree limbs and blowing around of
           light...unsecured objects. Heavy rain may cause temporary
           street flooding especially in poor drainage areas.

Some locations in the path of these storms include
Gainesville, Lawrenceville, Conyers, Winder, Jefferson, Commerce,
Cumming, Homer, Sandy Springs, Roswell, Johns Creek, Alpharetta,
Dunwoody, Milton, Duluth, Sugar Hill, Snellville, Suwanee, Buford and
Lilburn.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. If you can hear
thunder...you are close enough to be struck by lightning. Motorists
should slow down and be prepared for possible loss of control due to
hydroplaning.

LAT...LON 3428 8336 3424 8334 3426 8330 3420 8313
      3399 8348 3400 8350 3398 8351 3360 8414
      3414 8443 3446 8383
TIME...MOT...LOC 1150Z 325DEG 22KT 3429 8368 3390 8430

WIND...40MPH

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Special Weather Statement
National Weather Service Peachtree City GA
902 AM EDT THU JUN 28 2018

GAZ025-034-035-045>047-281330-
Jackson GA-Walton GA-Rockdale GA-Barrow GA-DeKalb GA-Gwinnett GA-
902 AM EDT THU JUN 28 2018

...SIGNIFICANT WEATHER ADVISORY FOR JACKSON...NORTHWESTERN WALTON...
NORTHEASTERN ROCKDALE...BARROW...EASTERN DEKALB AND GWINNETT COUNTIES
UNTIL 930 AM EDT...

At 901 AM EDT...a line of strong thunderstorms was along a line
extending from near Talmo to Lilburn...and moving southeast at 25
mph.

  HAZARD...Up to 40 mph wind...frequent cloud to ground lightning
           and heavy rain.

  IMPACT...Expect minor damage to tree limbs and blowing around of
           light...unsecured objects. Heavy rain may cause temporary
           street flooding especially in poor drainage areas.

Some locations in the path of these storms include
Lawrenceville, Conyers, Winder, Jefferson, Snellville, Lilburn,
Loganville, Braselton, Auburn, Dacula, Grayson, Statham, Arcade,
Nicholson, Hoschton, Walnut Grove, Bethlehem, Pendergrass, Between
and Carl.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. If you can hear
thunder...you are close enough to be struck by lightning. Motorists
should slow down and be prepared for possible loss of control due to
hydroplaning.

LAT...LON 3409 8342 3373 8390 3374 8391 3372 8392
      3367 8398 3388 8419 3412 8382 3420 8373
TIME...MOT...LOC 1301Z 308DEG 20KT 3415 8375 3386 8415

WIND...40MPH