Special Weather Statement, NWS Atlanta, GA

Area Forecast Discussion
National Weather Service Peachtree City GA
449 PM EDT Mon Mar 19 2018

.SHORT TERM /Tonight through Tuesday Night/...
An upper level low will deepen as it lifts into the TN valley
tonight. the surface front will push through the forecast area
through the day tomorrow. Pre-frontal convection - isolated
thunderstorms will move into portions of west GA over the next
hour, and increase in coverage through the evening hours. The
atmosphere has destabilized with breaks in clouds over west and
central GA. Ingredients for supercells will be in place across all
of CWA with MLCAPE of 1500-2500 J/kg across the area through this
evening. Vertical wind shear quite strong with 0-6km shear
ranging from 50kts over middle GA to 75kts in the far north and
0-1km shear 20kts over middle GA to 30kts in the far north. SPC
has issued a Tornado Watch west of our forecast area, but with the
sounding profiles from the HI-RES guidance supporting supercell
structures with strong rotating updrafts between 22z and 03z,
expect watches to be issued later this evening. A second line of
storms associated with the front will move across the state from
NW to SE after midnight into tomorrow, with cells weakening as
they get into central GA around daybreak, but while severe is not
expected we could still see thunder through the early morning
hours. Do mot expect as much clearing as models are advertising,
based upon the proximity of the wrap around moisture and have held
onto clouds through the day tomorrow with some break across north
Georgia by afternoon. Guidance temperatures are close and have
stayed close to a blend through the period. Temperatures will stay
nearly steady across northwest Georgia with a warm up over east
central Georgia ahead of the cold air advection.

Atwell

.LONG TERM /Wednesday through Monday/...
Wrap around moisture will move across north Georgia Tuesday night
into Wednesday as the upper upper low shifts into the Carolinas.
Cooler temperatures behind the cold front will bring light
showers over north Georgia, along with a rain/snow mix and snow
showers by morning over the higher elevations. Any accumulations
will be light at best. Otherwise extended forecast trends were
mostly unchanged. See previous forecast discussion below.

Atwell

LONG TERM /Tuesday Night through Sunday/...
Much colder temperatures will be advecting into the area on breezy
northwest winds by Tuesday night behind a cold front. As an upper
low passes to the north Tuesday night into Wednesday morning, the
chance for light showers will linger across primarily north Georgia.
With temperatures dropping near or below freezing by Wednesday
morning in far north Georgia, the likelihood for a transition to a
rain/snow mix or light snow showers will increase. Light snow
accumulations will be possible across the higher elevations by
Wednesday morning. At this time, generally expecting only up to a
around a half inch in these higher elevations. Any light snow
accumulations would melt by midday Wednesday as temperatures warm
well above freezing. Wednesday will remain a chilly day by late
March standards with high temperatures largely in the 50s (and 40s
in far north Georgia). Sustained northwest winds around 20 mph with
higher gusts will add to the chill.

Thursday and Friday will bring moderating temperatures and will
remain primarily dry with only a slight chance of a few showers
sneaking into far north Georgia by late Friday. Rain chances appear
to begin to increase more appreciably by Saturday as upper pattern
transitions into a more zonal flow and a low pressure system moves
into the Ohio Valley, though discrepancies remain with timing and
evolution.

RW

AVIATION...
18Z Update...
IFR or near IFR cigs will hold on over all TAF sites with a slow
improvement to MVFR between 20-22Z, just ahead of convection.
Will see IFR set up after 00Z with a second round of thunderstorms
overnight between 04-11Z across all TAF sites, but mainly ATL
area. Any TSRA will be scattered. SE-S winds will become SW as
line of storms moves thru 03-07Z then become west and increase to
10-15kts with gusts to 22-25kts after 15Z Tue. Expect variable
winds with gusts with any thunderstorms.

//ATL Confidence...18Z Update...
Medium to low confidence in CIGs.
Medium confidence in timing of convection.
Medium to high confidence in all other elements.

Atwell

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          58  70  39  54 /  80  20  20   5
Atlanta         57  65  37  52 /  70  30  30   5
Blairsville     49  61  33  42 /  90  50  50  30
Cartersville    53  63  36  52 /  90  40  30   5
Columbus        61  68  40  59 /  60  20  20   0
Gainesville     54  65  36  50 /  90  30  30  10
Macon           62  73  40  60 /  60  30  10   0
Rome            53  61  35  52 /  90  40  40   5
Peachtree City  57  66  38  55 /  80  30  30   0
Vidalia         65  76  44  61 /  50  50  10   5

&&

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

SHORT TERM...Atwell
LONG TERM....Atwell
AVIATION...Atwell

Hazardous Weather Outlook...Updated
National Weather Service Peachtree City GA
130 PM EDT Mon Mar 19 2018

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-201000-
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-
130 PM EDT Mon Mar 19 2018

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

.DAY ONE...This afternoon and Tonight...

The risk for severe thunderstorms, including tornadoes, will
increase across much of north and central Georgia through this
evening.

Isolated to scattered thunderstorms will develop this afternoon,
especially south of I-20. Some of these storms could be strong to
severe with large hail and brief gusty winds the primary threat,
along with heavy rain.

Later this afternoon through this evening, a more organized line of
severe thunderstorms will move from Alabama into northwest and west-
central Georgia.  It is along and ahead of this line where all modes
of severe weather exist, including tornadoes, large hail potentially
greater than 2 inches, and damaging winds in excess of 70 MPH. Heavy
rainfall and frequent lightning will also occur. Expect the
potential for severe weather to be its highest between 5 PM and 2 AM
Tuesday morning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday...

There will be a chance of thunderstorms over mainly central Georgia
on Tuesday. The severe threat is reduced Tuesday but a few storms
could be strong to severe with large hail and damaging winds the
primary threats.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is likely this afternoon through tonight.
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
503 PM EDT MON MAR 19 2018

GAZ042-052-192130-
Carroll GA-Heard GA-
503 PM EDT MON MAR 19 2018

...SIGNIFICANT WEATHER ADVISORY FOR CARROLL AND NORTHWESTERN HEARD
COUNTIES UNTIL 530 PM EDT...

At 503 PM EDT...a strong thunderstorm was over Bowdon, or 11 miles
west of Carrollton...moving east at 35 mph.

  HAZARD...40 to 50 mph wind...up to penny sized hail and frequent
           cloud to ground lightning.

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

Some locations in the path of this storm include
Carrollton, Bowdon, Mount Zion, Whitesburg, Ephesus, Roopville, Byers
Crossroads, Tyus, Roosterville, Seaton Lake, Clem, Abilene, John
Tanner State Park, Lowell, Plant Wansley, Treasure Lake and Blackjack
Mountain.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. If you can hear
thunder...you are close enough to be struck by lightning.

LAT...LON 3369 8490 3358 8491 3357 8485 3351 8484
      3352 8485 3349 8486 3348 8490 3344 8494
      3346 8498 3344 8498 3343 8501 3341 8501
      3337 8528 3362 8533
TIME...MOT...LOC 2103Z 261DEG 30KT 3352 8526

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

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Special Weather Statement
National Weather Service Peachtree City GA
538 PM EDT MON MAR 19 2018

GAZ001-192215-
Dade GA-
538 PM EDT MON MAR 19 2018

...SIGNIFICANT WEATHER ADVISORY FOR DADE COUNTY UNTIL 615 PM EDT...

At 538 PM EDT...a strong thunderstorm was over Haletown (guild), or
near Jasper...moving east at 55 mph.

  HAZARD...40 to 50 mph wind...up to penny sized hail and frequent
           cloud to ground lightning.

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

Some locations in the path of this storm include
Trenton, Stephensville, Rising Fawn, New England, Morganville,
Cloudland Canyon State Park, Hooker, Cole City and Wildwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. If you can hear
thunder...you are close enough to be struck by lightning.

LAT...LON 3498 8537 3495 8538 3487 8544 3485 8544
      3473 8556 3486 8559 3498 8560
TIME...MOT...LOC 2138Z 255DEG 46KT 3500 8553

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

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
542 PM EDT MON MAR 19 2018

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

0520 PM     HAIL             LESLIE                  31.96N  84.08W
03/19/2018  E1.00 INCH       SUMTER             GA   PUBLIC

            AT LEAST 1 INCH HAIL WAS REPORTED IN THE TOWN OF
            LESLIE.

&&

EVENT NUMBER FFC1800010

LMERRITT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
546 PM EDT MON MAR 19 2018

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

0518 PM     HAIL             LESLIE                  31.96N  84.09W
03/19/2018  E1.00 INCH       SUMTER             GA   EMERGENCY MNGR

            THE EMERGENCY MANAGER REPORTED 1 INCH HAIL IN LESLIE.

&&

EVENT NUMBER FFC1800011

LMERRITT

Special Weather Statement
National Weather Service Peachtree City GA
547 PM EDT MON MAR 19 2018

GAZ080-093-192215-
Macon GA-Taylor GA-
547 PM EDT MON MAR 19 2018

...SIGNIFICANT WEATHER ADVISORY FOR MACON AND SOUTHERN TAYLOR
COUNTIES UNTIL 615 PM EDT...

At 547 PM EDT...a strong thunderstorm was over Ideal, or 10 miles
northwest of Oglethorpe...moving east at 40 mph.

  HAZARD...Up to 40 mph wind...pea sized hail and frequent cloud to
           ground lightning.

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

Some locations in the path of this storm include
Montezuma, Marshallville, Ideal, Saint Louis, Whitewater State Park,
Garden Valley, Winchester and Bartlett.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. If you can hear
thunder...you are close enough to be struck by lightning.

LAT...LON 3236 8426 3245 8425 3249 8393 3248 8392
      3249 8392 3250 8390 3248 8386 3229 8385
TIME...MOT...LOC 2147Z 270DEG 34KT 3241 8417

HAIL...0.25IN
WIND...40MPH