Johns Creek, Georgia 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

004
FXUS62 KFFC 290050
AFDFFC

Area Forecast Discussion
National Weather Service Peachtree City GA
850 PM EDT Sun Jun 28 2026

...Evening Update...

.KEY MESSAGES...

 - Another Heat Advisory will be in effect for most of Georgia
   including the Atlanta Metro for Monday from 12 PM to 8 PM.

 - Heat builds through the weekend into next week, with afternoon highs
   climbing into the 90s and heat index values over 100 for much
   of the week.

 - Chances for afternoon showers and thunderstorms are expected in
   far north Georgia through this evening and in east Georgia on
   Monday. Isolated to scattered thunderstorms are possible each
   afternoon through the week.

&&

.UPDATE...
Issued at 816 PM EDT Sun Jun 28 2026

While the heat advisory for today has ended, warm temperatures still
linger across most of North and Central GA this evening. Current
temperatures still sit 80s (upper 70s in the northeast) with heat
indices or `feels like` temperatures in the 90s. While
temperatures will come down overnight temperatures will only
settle in the mid to upper 70s. Continue to take precautions if
spending time outdoors. Another Heat Advisory will be in effect
for most of North and Central Georgia again on Monday as heat
indices exceed 105 and nearing 110-112F across portions of
southeast-Central GA (i.e. Dublin, Swainsboro, Vidalia areas).

&&

.SHORT TERM...
(This afternoon through Monday)
Issued at 129 PM EDT Sun Jun 28 2026

An amplifying ridge continues to spread eastward, increasing
temperatures through central and northern Georgia. At the surface,
high pressure centered over the Gulf remains relatively in place
through Monday. The  main concerns today and Monday are the heat.
With the height rises from the ridge, confidence is increasing for
heat indices of 103-105 with more widespread 105+ from the Atlanta
Metro and south, with the higher heat indices further south. With
this, a Heat Advisory is in effect through 8 PM and a new Heat
Advisory will be in effect for the majority central Georgia
including the Atlanta Metro from 12 PM through 8 PM.

Additionally, as the high shifts eastward, showers and thunderstorms
are possible on the eastern fringe for the far northern Georgia
locations. Current guidance shows decent instability but weaker W/NW
winds, an environment not particularly favorable for severe weather.
At this time, guidance depicts a few scattered showers popping up
this afternoon ahead of a cluster of thunderstorms diving down from
Tennessee into the evening hours. Given the location of the surface
high, the higher chances (30-50%) are concentrated in the northern
counties. Though unlikely, cannot rule out a brief strong storm this
evening. As for Monday, another slight chance (15-30%) for scattered
showers and thunderstorms, mainly across central and eastern Georgia.

&&

.LONG TERM...
(Tuesday morning through next Saturday)
Issued at 129 PM EDT Sun Jun 28 2026

No major chances to notate in the extended period. High pressure
remains dominate over Georgia for the rest of the week as the center
of the H500 ridge stays over the gulf coast states, only shifting
northeast towards the Mid Atlantic region at the end of the week.
Many locations in the CWA will host 850 mb temperatures around 20
degrees Celsius through the rest of the week for the late afternoon
hours. This combined with >590 decimeter heights will support hot
high temperatures over much of Georgia. On average, highs will top
out in the mid to upper 90s for the week, lows may only fall to the
lower or mid 70s. High-end relative humidity also prevails over the
CWA, which leads to the main impact this week: Hot heat indices over
100 degrees each day, and for some locations over 105 degrees. Heat
safety precautions are still encouraged as heat product issuance
seems likely for the next several days.

Despite high pressure lingering over the region, daily thunderstorm
chances are still present through the week. General thunderstorms
are expected with isolated to scattered coverage shifting through
the FA depending on the day. Strong mid-level theata-e values will
support convective development off the axis of the high pressure
center. However, diurnal heating will need to overcome strong
inhibition in order for convective initiation to be achieved.

&&

.AVIATION...
(00Z TAFS)
Issued at 724 PM EDT Sun Jun 28 2026

Prevailing VFR at all sites. Lingering Cu (5-6kft) may linger
overnight with W winds subsiding after 00z to 7kts or less. Winds
turn NW/N with speeds 5-8kts by 14z. FEW to SCT cu (3.5-5kft)
developing by 14-15z Monday lasting thru the day. Iso to widely
sct tsra potential after 18z. Low confidence as far east at
ATL/PDK, slightly higher confidence in occurrence at AHN. Timing
may be closer to 00z for MCN.

//ATL Confidence...00Z Update...

Low confidence on occurrence/timing of tsra.
High confidence on all other elements.

07

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          75  97  75  96 /  10  30  30  10
Atlanta         77  96  78  95 /   0  20  20  20
Blairsville     68  87  70  88 /  10  20  10  40
Cartersville    75  95  77  96 /   0  10  10  20
Columbus        75  98  77  96 /   0  10  10  50
Gainesville     74  95  75  94 /   0  30  20  10
Macon           76  97  76  95 /   0  30  30  20
Rome            74  96  76  96 /   0  10   0  20
Peachtree City  75  96  76  94 /   0  20  20  40
Vidalia         77  98  76  96 /  10  30  20  20

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
Heat Advisory from noon to 8 PM EDT Monday for GAZ019>025-027-
030>039-041>062-066>076-078>086-089>098-102>113.

&&

$$

SHORT TERM...Patterson
LONG TERM....Rangel
AVIATION...07