Special Weather Statement, NWS Atlanta, GA

Area Forecast Discussion
National Weather Service Peachtree City GA
1113 AM EDT Mon Mar 31 2025

.UPDATE...
Issued at 1048 AM EDT Mon Mar 31 2025

The forecast remains mostly on track, with a line of strong
thunderstorms starting to move into portions of NW Georgia this
morning. This line will continue to push across the remainder of
north and central GA through the remainder of the morning and
afternoon hours, with the primary threat of damaging straight-line
wind gusts, and a secondary threat for brief tornadoes. With the
line going slightly slower than originally anticipated, there may
be enough sunlight and mixing to maximize instability ahead of the
line across areas of central Georgia later on the this afternoon,
locally increasing the severe threat. Regardless, Severe
Thunderstorm watches will likely be needed for the entire area
today. The most likely timing for severe weather across NW GA is
now through 1PM, with Noon-3PM for the I-85 corridor and Atlanta
metro, and 2PM-6PM for areas of central GA including Columbus,
Macon, and portions of I-75 and I-16. We will still have to watch
out for additional storms popping up behind this initial line of
storms across north Georgia, as severe ingredients will still be
in place when a front pushes through late this afternoon into
early evening.

&&

.SHORT TERM...
(Today through Tuesday)
Issued at 415 AM EDT Mon Mar 31 2025

500 mb RAP analysis overlaid on mid-level water vapor satellite
imagery shows a shortwave lifting northeast across the OH River
Valley. An associated cold front currently stretches from the
Great Lakes region through the MS River Valley into the ArkLaTex
region. A northeast-to-southwest oriented QLCS has developed ahead
the cold front and is marching eastward. It is currently just
west of the Appalachians, across east-central TN, far northern AL,
and northern MS. SPC mesoanalysis depicts mid-level lapse rates
of 7-8 C/km across north GA, metro Atlanta, and west GA, as well
as CAPE values of 500-1000 J/kg and little to no CIN... evidence
of the warm, moist (dew points are in the 60s) and unstable
environment in place ahead of the QLCS.

As of the issuance of the morning forecast package, the QLCS
could arrive across far north GA as early as 11z to 13z (7 AM to 9
AM). The timing for metro Atlanta is between 14z (10 AM) and 20z
(4 PM), and for central GA, between 17z (1 PM) and 22z (6 PM).
Along and ahead of the QLCS later this morning and through the
afternoon, HREF mean MUCAPE is 1000-2000 J/kg and surface to 500
mb bulk shear is 30-40 kts. Like what has been occurring thus far
with this system, expect that damaging straight-line winds will be
likely. The QLCS has exhibited a LEWP (line echo wave pattern)
upstream this morning, and SCP (Supercell Composite Parameter)
values per the latest HRRR run suggest an overlap in key supercell
ingredients across north and central Georgia. The latest HRRR and
the 00z runs of other CAMs also depict 0-1 km bulk shear of 30-40
kts. All that to say that the potential for line-embedded brief
tornadoes has increased.

Regarding the SPC Convective Outlooks for today, the arrival of
the QLCS in far northwest/far north-central GA prior to 7 AM is
covered by an Enhanced Risk (level 3 out of 5) to Slight Risk
(level 2 out of 5). For the remainder of the morning through the
afternoon, SPC has virtually the entire CWA in an Enhanced Risk or
Slight Risk, as the QLCS pushes southeastward and is
reinvigorated by daytime heating. As mentioned above, the severe
weather threat today is driven primarily by straight-line winds
with a secondary threat for brief tornadoes. The potential for
hail is relatively low, as QLCSs are not typically hail producers.

An important consideration/caveat -- isolated to scattered
drizzle/showers are developing ahead of the QLCS across portions
of AL and GA at the time of this writing. This activity could
stabilize the environment somewhat before the QLCS arrives, so a
slight weakening trend could occur as the system moves into GA.
That said, expect that enough destabilization will occur with
insolation that the QLCS will reintensify later this morning and
afternoon as it treks eastward. Another important
consideration/caveat -- the CAMs depict a broken line of showers
and storms developing behind the QLCS later this afternoon and
early evening as the actual front moves through from northwest to
southeast. A few strong (possibly severe) storms will be possible
as ample instability and shear parameters look to still be in
place at that time.

While some of the storms today will be heavy rainfall producers,
the forward motion of the QLCS should preclude flash flooding.
That said, localized nuisance/low-impact flooding will be possible
with any storms that are especially strong and occur over areas
with poor drainage.

The active weather will exit the southeastern portion of the CWA
tonight. Cooler, drier air will move into north GA in its wake --
overnight/early Tuesday morning lows will be in 40s, with upper
30s possible in the mountains. Lows in the 50s are expected across
central GA. A dry, sunny Tuesday is in store with spring-like
afternoon highs in the 70s and 80s.

Martin

&&

.LONG TERM...
(Tuesday night through Sunday)
Issued at 415 AM EDT Mon Mar 31 2025

The heat will be the main story of the long term outlook. Near
surface high pressure builds back in over the Southeast coast and
upper level southwest flow dominates the central CONUS. A little
tastE of the summer-time doom ridge. Highs each day start off
above average for this time of year and only climb through the end
of the week (upper 80s and maybe even breaking 90). All climate
sites have records of 88 to 91 degrees through the 6th. Not only
will it be warm to hot, southwest flow and moisture transport mean
it could also be sticky (a little taste of summer). PWATS
Wednesday onward hold at or above 1", so now is the time to make
sure you have a way to stay cool.

While the main jet support will be further north, low end PoPs
remain across north GA from Wednesday through the close of the
long term outlook. Any shortwave which rides the upper level flow
and clips our area could initiate thunderstorms, even in spite of
the sfc high. The combination of moisture and heat, as well as
bulk shear around 30 kts, suggests that an isolated storm could
become strong. This, of course, is highly dependent on storms
being able to form in the first place.

Our next chance for more widespread rain and a little bit of a
cool off is Sunday at the earliest. It all depends on when the
ridge breaks down.

SM

&&

.AVIATION...
(12Z TAFS)
Issued at 638 AM EDT Mon Mar 31 2025

Isolated to scattered -SHRA and -DZ have developed across north
and central Georgia. A line of TSRA currently over eastern MS,
northern AL, and eastern TN will slowly push through over the
course of the morning and afternoon. TSRA are forecast to impact
RYY between 15z and 19z, ATL and FTY between 16z and 20z, PDK and
AHN between 17z and 21z, and MCN and CSG between 18z and 22z.
IFR/LIFR cigs are progged to lift to MVFR this afternoon. Reduced
vsby and wind gusts of 40+ kts are expected in TSRA. Winds are due
S to SSW. Outside of TSRA today, winds will be 8-13 kts with
gusts up to 20-22 kts.

//ATL Confidence...12Z Update...
Medium confidence on timing of line of TSRA and evolution of cigs
this afternoon. High confidence on all other elements.

Martin

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          75  48  78  55 /  90  20   0  20
Atlanta         74  48  77  60 / 100  20   0  20
Blairsville     69  40  74  50 / 100  10   0  10
Cartersville    74  43  76  56 /  90  10   0  10
Columbus        77  51  82  61 /  90  10   0  10
Gainesville     73  47  75  56 / 100  10   0  20
Macon           79  51  81  60 /  90  30   0  10
Rome            74  43  76  56 / 100   0   0  10
Peachtree City  74  46  78  58 / 100  10   0  10
Vidalia         83  60  84  63 /  90  50  10  10

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
None.
&&

SHORT TERM...Culver
LONG TERM....SM
AVIATION...Martin

Hazardous Weather Outlook
National Weather Service Peachtree City GA
1048 AM EDT Mon Mar 31 2025

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-011500-
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-
1048 AM EDT Mon Mar 31 2025

This Hazardous Weather Outlook is for north and central Georgia.

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

An ongoing line of storms will move across the forecast area
through the afternoon and will be capable of damaging wind gusts,
hail, and isolated tornadoes. Thunderstorms may redevelop behind
the line late in the afternoon to early evening, posing a second
threat for severe weather.

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

Storms will be possible across parts of north and central Georgia
from Wednesday through Friday.

Temperatures Wednesday onward will be well above normal with highs
reach near record levels.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is requested this morning through Monday
evening. Spotters are encouraged to report or relay severe weather
reports to the National Weather Service.

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