Special Weather Statement, NWS Atlanta, GA

Area Forecast Discussion...Updated
National Weather Service Peachtree City GA
1035 PM EDT Thu Aug 13 2020

.Update...
Have adjusted pops to account for persistent showers/storms
across north GA. Coverage should diminish but expect some
convection to linger through the night. Otherwise no changes.

41

.Previous...
.SHORT TERM /Tonight through Friday Night/...

Afternoon convection is starting to develop all around the
forecast area with isolated to scattered convection mainly across
north Georgia. HI-RES models showing convection increasing across
the area through this evening and lingering into the overnight
hours. The models are in good agreement that a mid to upper level
trough will move into Central TN tonight and into northwest
Georgia by tomorrow night. Proximity of trough will provide enough
lift to support thunderstorm activity this afternoon and evening
to continue into the overnight hours. At the same time,
precipitable water values over 2 inches will result in likely
pops across the board and locally heavy rainfall with any stronger
storm. AS trough moves closer to the area tomorrow will once again
see an increase coverage and intensity of afternoon and evening
convection, with storms again continuing into the overnight hours.

Increased convection and clouds throughout the day will bring
afternoon temperatures at or just below normal and overnight lows
near or just above normal for this time of year.

Atwell

.LONG TERM /Saturday through Thursday/...

At beginning of the upcoming weekend, the upper level trough axis
will be shifting eastward across the forecast area, bringing another
day of likely to categorical PoPs on Saturday. Given widespread
showers and thunderstorms, high temperatures Saturday will be held
in the 80s for north Georgia and near 90 in central Georgia. By
Sunday, the upper trough has shifted eastward with northwest flow
aloft. At the surface, a weak front will push southeastward,
providing sufficient lift for some scattered shower and thunderstorm
activity Sunday afternoon.

A secondary surface front should usher in somewhat drier air on
Monday in north Georgia, though models continue to differ regarding
the extent of the dry airmass. This drier air will serve to limit
convective coverage Monday afternoon in north Georgia to the more
isolated variety with slightly higher potential in central Georgia.
The front will become stationary by Tuesday, bisecting the state.
PoPs will thus begin to trend back upward, especially across the
southeastern half of the area Tuesday where deeper moisture resides.
Meanwhile, an upper trough will dig southeastward by midweek,
providing further impetus for increasing PoPs by the end of the
current forecast period.

RW

&&

AVIATION...
00Z Update...
Ongoing convection could last well into the evening. Will continue
to monitor and adjust timing if needed. Models indicate there
could be a continuation of storms overnight. VFR will prevail
outside of convection...and should see CIGs/VIS deteriorate to
MVFR/IFR between 08-13Z with quick improvement to SCT clouds and
VFR. Expect convection again tomorrow. Winds will continue to favor
the west at 7kts or less.

//ATL Confidence...00Z Update...
Medium confidence all elements.

41

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          72  88  71  87 /  60  70  60  70
Atlanta         73  87  72  87 /  60  60  60  70
Blairsville     67  80  66  80 /  50  80  60  80
Cartersville    72  86  71  87 /  60  80  60  70
Columbus        74  89  73  89 /  60  60  50  70
Gainesville     71  84  70  85 /  60  70  60  70
Macon           73  90  72  90 /  50  50  40  80
Rome            72  86  71  87 /  60  70  60  70
Peachtree City  72  87  71  87 /  60  70  50  70
Vidalia         74  91  74  91 /  50  50  30  80

&&

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

SHORT TERM...41
LONG TERM....RW
AVIATION...41

Hazardous Weather Outlook
National Weather Service Peachtree City GA
1057 PM EDT Thu Aug 13 2020

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-150300-
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-
1057 PM EDT Thu Aug 13 2020

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

.DAY ONE...Tonight...

Scattered thunderstorms are expected to linger through much of the
night. A few storms will be strong with gusty winds...frequent
lightning...and locally heavy rain.

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

Numerous to occasional thunderstorms are expected Friday and
Saturday, scattered thunderstorms are expected Sunday and Monday,
and scattered to numerous thunderstorms are expected Tuesday and
Wednesday. A few storms will be strong to severe each day, with
strong to damaging winds, frequent lightning, small hail, and
locally heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected through tonight.

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Special Weather Statement
National Weather Service Peachtree City GA
916 PM EDT Thu Aug 13 2020

GAZ033-044-140145-
North Fulton GA-South Fulton GA-
916 PM EDT Thu Aug 13 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTH FULTON AND NORTHEASTERN
SOUTH FULTON COUNTIES UNTIL 945 PM EDT...

At 915 PM EDT...a strong thunderstorm with very heavy rain was
centered 5 miles west of College Park, or 8 miles southwest of
Atlanta. This storm was moving very slowly east.

  HAZARD...40 to 50 mph wind...up to penny sized hail...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 this storm include
Atlanta, East Point, College Park, Cascade Heights and Sandtown.

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 3373 8458 3376 8446 3369 8442 3364 8445
      3365 8446 3363 8446 3364 8457
TIME...MOT...LOC 0115Z 262DEG 3KT 3368 8452

HAIL...0.75IN
WIND...50MPH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
927 PM EDT THU AUG 13 2020

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

0655 PM     TSTM WND DMG     1 SW BUFORD DAM-LAKE LA 34.15N  84.07W
08/13/2020                   GWINNETT           GA   PUBLIC

            LARGE PINE SNAPPED AND FELL DAMAGING A HOME'S PORCH
            ALONG RIVER ISLAND CIRCLE.

&&

EVENT NUMBER FFC2001151

LUSK

Special Weather Statement
National Weather Service Peachtree City GA
931 PM EDT Thu Aug 13 2020

GAZ074-084-140200-
Wilkinson GA-Washington GA-
931 PM EDT Thu Aug 13 2020

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN WILKINSON AND
SOUTHWESTERN WASHINGTON COUNTIES UNTIL 1000 PM EDT...

At 931 PM EDT...a strong thunderstorm was centered near Oconee, or
12 miles southwest of Sandersville. This storm was nearly stationary.

  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 this storm include
Oconee.

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 3277 8291 3276 8294 3275 8295 3278 8306
      3292 8300 3294 8284 3286 8281
TIME...MOT...LOC 0131Z 271DEG 3KT 3286 8296

WIND...40MPH

Special Weather Statement
National Weather Service Peachtree City GA
941 PM EDT Thu Aug 13 2020

GAZ049-140215-
Morgan GA-
941 PM EDT Thu Aug 13 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN MORGAN COUNTY UNTIL
1015 PM EDT...

At 940 PM EDT...a strong thunderstorm was centered near Reese, or
9 miles west of Madison. This storm was nearly stationary.

  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 this storm include
Rutledge.

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 3345 8355 3349 8362 3353 8368 3360 8368
      3363 8354 3354 8351
TIME...MOT...LOC 0140Z 271DEG 4KT 3355 8362

WIND...40MPH

Special Weather Statement
National Weather Service Peachtree City GA
1104 PM EDT Thu Aug 13 2020

GAZ074-076-140330-
Jefferson GA-Washington GA-
1104 PM EDT Thu Aug 13 2020

...SIGNIFICANT WEATHER ADVISORY FOR JEFFERSON AND EASTERN WASHINGTON
COUNTIES UNTIL 1130 PM EDT...

At 1103 PM EDT...a strong thunderstorm was near Stapletons
Crossroads, or near Louisville...moving southeast at 30 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 as well
           as rapid rise of local creeks and streams.

Some locations in the path of this storm include
Louisville, Davisboro, Avera, Grange, Downs and Stapletons
Crossroads.

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 3289 8249 3305 8270 3313 8263 3312 8258
      3316 8257 3316 8258 3317 8258 3321 8253
      3321 8252 3310 8231
TIME...MOT...LOC 0303Z 306DEG 27KT 3304 8251

WIND...40MPH