Special Weather Statement, NWS Atlanta, GA

Area Forecast Discussion
National Weather Service Peachtree City GA
754 PM EDT Fri Aug 4 2017

.PREV DISCUSSION... /Issued 336 PM EDT Fri Aug 4 2017/

SHORT TERM /Tonight through Saturday Night/...

A front will move through the northern portion of GA tonight before
becoming hung up across central GA through the weekend. Ahead of the
front some showers and isolated thunderstorms are moving across the
region. Two many areas to note: (1) The convection moving ahead of
the front to our NW and (2) the convection moving in across central
GA from upper level impulses. Coverage of showers/thunderstorms may
increase a bit later this afternoon/evening ahead of the front.
While the cloud cover has helped keep instability down a bit, the
highest CAPE is across central GA. Meanwhile, there is a bit better
shear to the north correlated with the front. With these disjointed
features, organized widespread convection will be limited.  Not to
mention the frontal passage being past peak heating. Expect the
precipitation activity to diminish as we go through the overnight.
Winds will begin to shift behind the front, albeit rather light from
the NW. Fog and stratus may be an issue by the morning as low level
moisture becomes trapped under the inversion, especially across
central GA. Depending on the exact placement of the front, this will
be the axis by which we see shower and thunderstorm development
again tomorrow afternoon.  More than likely the front will be
situated just north of a line from Columbus to Macon to Augusta.
Therefore, anticipate a bit better precipitation coverage in region.
Winds behind the front will become NW while south of the front,
winds will still be around of the SW supplying more moisture. North
GA will have a pretty pleasant day tomorrow with scattered mid level
CU formation.

Temperatures will be a couple degrees below normal...lows in the
low/mid 60s across the north to low 70s in central GA.  Highs in the
low/mid 80s in the higher terrain to mid/upper 80s elsewhere.

26

LONG TERM /Sunday through Friday/...

Latest guidance still indicating overall active pattern
supportive of high end chance to likely pops through next week so
made little change to previous other than a few periods with
slightly higher adjustments given increased confidence. Otherwise
did a refresh on other fcst elements per guidance blend. Previous
discussion follows...

Baker

LONG TERM /Saturday Night through Thursday/...
A generally wet and unsettled summertime weather pattern will
predominate this long term period as abundant moisture will be
available to fuel showers and thunderstorms....most so during
the afternoon and evening hours but possibly other times as well.

A stationary front across the n to central GA area and the passage
of an upper level trough will have brought much diminished shower
and storm chances to the area Saturday night. This will be relatively
short-lived as moisture will be returning Sunday/Sunday night across
the area with the NAM and GFS faster than the European.
Another weak cold front drifts into n GA late Tuesday and Wednesday.
A moist WSW flow aloft with potential short waves will favor n GA
slightly through this period with the highest pops but not by much.

Temperatures are expected to run close to normal for overnight
lows and up to several degrees below normal for daytime highs.

BDL

&&

.AVIATION...
00Z Update...
Generally VFR conditions across the area this evening, with
showers and thunderstorms still developing over the state. A cold
front will move through late this evening, with drier air and
clearing conditions behind it. Expect the front to push south of
the ATL/AHN area sites, and keep CSG and MCN in a favorable
environment for IFR cigs and restricted visibilities. Lingering
clouds are expected across middle Georgia into Saturday, with
PROB30 for TSRA after 18z. Winds will shift from the SW to the NW
tonight as the front moves through. Winds will generally be 6kt or
less overnight, 5-8kt through the day Saturday, and gusty in/near
convection.

//ATL Confidence...00Z Update...
Medium on cigs/vsbys after 04z.
High confidence on all other elements.

31

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          69  89  68  88 /  40  20  30  50
Atlanta         70  87  71  87 /  40  20  30  50
Blairsville     61  82  59  83 /  50  10  20  30
Cartersville    67  86  64  88 /  30  20  30  40
Columbus        72  88  73  88 /  60  50  30  60
Gainesville     68  86  68  86 /  40  20  30  40
Macon           71  88  71  89 /  60  50  30  50
Rome            66  86  63  88 /  40  10  20  40
Peachtree City  69  87  68  87 /  40  30  30  50
Vidalia         72  86  72  89 /  70  50  30  50

&&

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

SHORT TERM...31
LONG TERM....17
AVIATION...31

Hazardous Weather Outlook
National Weather Service Peachtree City GA
327 PM EDT Fri Aug 4 2017

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-051930-
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-
327 PM EDT Fri Aug 4 2017

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

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

Scattered to numerous thunderstorms are expected across the area
this afternoon and evening. Isolated strong to severe
thunderstorms are possible across north and portions of central
Georgia. The main hazards will be strong gusty winds, hail,
frequent lightning and locally heavy rain.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday...

There will be a chance for thunderstorms each day, most so during
the afternoon and evening hours. A few storms could be strong to
severe with the main hazards being gusty winds, frequent lightning
and locally heavy rain.

.SPOTTER INFORMATION STATEMENT...

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

Special Weather Statement
National Weather Service Peachtree City GA
822 PM EDT FRI AUG 4 2017

GAZ072-081>083-050115-
Bibb GA-Crawford GA-Jones GA-Twiggs GA-
822 PM EDT FRI AUG 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR BIBB...NORTHEASTERN CRAWFORD...
SOUTHERN JONES AND WESTERN TWIGGS COUNTIES UNTIL 915 PM EDT...

At 821 PM EDT...a strong thunderstorm was near Sandy Point, or 9
miles northeast of Roberta...moving east at 20 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
Macon, Payne, Payne City, Cross Keys, Wesleyan, Dry Branch, Lizella,
Lake Tobesofkee, Skipperton, Arkwright, Rutland and Franklinton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

LAT...LON 3285 8391 3285 8389 3288 8384 3299 8360
      3273 8346 3273 8386
TIME...MOT...LOC 0021Z 253DEG 16KT 3281 8389

Special Weather Statement
National Weather Service Peachtree City GA
823 PM EDT FRI AUG 4 2017

GAZ069-078>080-050130-
Harris GA-Taylor GA-Upson GA-Talbot GA-
823 PM EDT FRI AUG 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN HARRIS...
NORTHWESTERN TAYLOR...WESTERN UPSON AND TALBOT COUNTIES UNTIL 930 PM
EDT...

At 823 PM EDT...a strong thunderstorm was over Olive Branch, or near
Talbotton...moving east at 20 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
Talbotton, Woodland, Junction City, Geneva, Sunset Village,
Baldwinville, Baughville, Olive Branch, Po Biddy Crossroads, Sprewell
Bluff State Park, Pleasant Hill, Howard, Sunnyside, Prattsburg, Big
Lazer Creek Wma and Wesley Church.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

LAT...LON 3292 8438 3255 8430 3255 8445 3256 8445
      3256 8449 3255 8449 3254 8451 3255 8454
      3254 8454 3254 8468 3256 8467 3256 8469
      3258 8469 3259 8470 3275 8472
TIME...MOT...LOC 0023Z 253DEG 16KT 3269 8461

Special Weather Statement
National Weather Service Peachtree City GA
842 PM EDT FRI AUG 4 2017

GAZ023>025-034-035-050130-
Banks GA-Hall GA-Jackson GA-Barrow GA-Gwinnett GA-
842 PM EDT FRI AUG 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BANKS...SOUTHEASTERN
HALL...JACKSON...NORTHWESTERN BARROW AND NORTHEASTERN GWINNETT
COUNTIES UNTIL 930 PM EDT...

At 842 PM EDT...a strong thunderstorm was over Chestnut Mountain, or
10 miles south of Gainesville...moving east at 20 mph.

  HAZARD...40 mph wind 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 this storm include
Gainesville, Jefferson, Commerce, Braselton, Flowery Branch, Oakwood,
Maysville, Arcade, Hoschton, Pendergrass, Gillsville, Talmo, Candler,
Peach State Speedway, Thompsons Mill, Chateau Elan, Chestnut
Mountain, Road Atlanta-Lanier Speedway and Apple Valley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. Motorists should
slow down and be prepared for possible loss of control due to
hydroplaning.

LAT...LON 3406 8391 3419 8394 3438 8355 3410 8345
TIME...MOT...LOC 0042Z 252DEG 16KT 3415 8384

WIND...40MPH

Special Weather Statement
National Weather Service Peachtree City GA
859 PM EDT FRI AUG 4 2017

GAZ008-009-050145-
Union GA-Towns GA-
859 PM EDT FRI AUG 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN UNION AND TOWNS COUNTIES
UNTIL 945 PM EDT...

At 859 PM EDT...a strong thunderstorm was over Ivy Log, or near
Blairsville...moving east at 20 mph.

  HAZARD...Winds up to 40 mph and up to penny sized hail.

  IMPACT...Expect minor damage to tree limbs and blowing around of
           light...unsecured objects.

Some locations in the path of this storm include
Hiawassee, Blairsville, Young Harris, Blue Mountain Shelter,
Brasstown Bald, Gumlog, Nottely Dam, Ivy Log, Mountain Scene, Track
Rock, Macedonia, Alexanders Mill and Jones Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately.

LAT...LON 3489 8364 3488 8366 3483 8366 3482 8365
      3481 8367 3484 8410 3499 8411 3499 8364
TIME...MOT...LOC 0059Z 269DEG 17KT 3494 8402

HAIL...0.75IN
WIND...40MPH

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