Basin Lake, Georgia Weather Forecast Discussion

272
FXUS62 KJAX 070106
AFDJAX
Area Forecast Discussion
National Weather Service Jacksonville FL
906 PM EDT Sat Sep 6 2025
...New UPDATE, AVIATION...
.UPDATE...
Issued at 818 PM EDT Sat Sep 6 2025
For the latest NE FL and SE GA Daily Key Messages please visit:
https://www.weather.gov/media/jax/briefings/nws-jax-briefing.pdf
For the evening update adjust rain chances upward for northeast
Florida south of the Interstate 10 corridor where convection was
building northward with an outflow boundary. Expect the bulk of
rainfall will tapper off inland through midnight into stratiform
with mainly coastal showers and isolated storm over the FL waters
near and just north of a frontal zone and broad low pressure
developing across north-central FL or just offshore of the local
coast tonight. With rainfall mainly hugging coastal NE FL, the
increase in low level moisture and light and variable winds
continues to support low stratus and likely intermittent fog
across inland locations.
Low temperatures will trend near to above normal in the low 70s.
&&
.NEAR TERM...
(Through Tonight)
Issued at 127 PM EDT Sat Sep 6 2025
For the latest NE FL and SE GA Daily Key Messages please visit:
https://www.weather.gov/media/jax/briefings/nws-jax-briefing.pdf
Moisture continues to lift northward along old frontal boundary
into NE FL as PWATs have surged back around 2 inches and surface
dewpoints have increased into the mid/upper 70s. The low level
onshore flow and convergence has produced scattered showers along
the I-95 corridor of coastal NE FL, which is still on track to
shift inland with the East Coast sea breeze pushing across inland
NE FL and meeting up with the Gulf Coast sea breeze front near the
I-75 corridor and expect scattered to numerous showers along with
embedded storms with locally heavy rainfall potential due to the
increased moisture and slow storm motion at 10 mph or less.
Convection over inland areas fades after sunset, leaving partly to
mostly cloudy skies ahead of approaching front from the Northwest.
Temps return to normal to above normal levels as the cloud cover
will hold Min Temps in the lower 70s inland and mid to upper 70s
along the Atlantic Coast. While some isolated showers will be
possible through the night, the increasing low level moisture will
likely lead to low stratus and patchy fog development in most
inland areas, especially towards sunrise Sunday morning.
&&
.SHORT TERM...
(Sunday through Monday night)
Issued at 127 PM EDT Sat Sep 6 2025
Higher layer moisture returns across the entirety of the area on
Sunday, pooling ahead of another cold front approaching from the
northwest. The front will cross the area Sunday Night, losing
steam and stalling just south of the region on Monday. The higher
moisture will result in more numerous showers and thunderstorms to
return across the area Sunday, supported by both the lift of the
lingering boundary to our south as well as the stronger boundary
approaching from the north and west. With these two separate
boundaries, hi-res guidance is in pretty good agreement in
painting almost two separate areas of convective initiation, one
being south of I-10 in Florida and a second over far interior GA
with the daytime heating ahead of the front. The thermodynamic
profile is not tremendously impressive across the region tomorrow,
though some pockets of lingering dry air aloft combining with a
bump up in effective shear with the front and upper level
shortwave could be enough to yield some isolated stronger
downbursts in the 40-50 mph range. Some activity may linger
through at least the first half of the night as well with any
remaining mesoscale boundaries as well as near the coast with the
added nighttime coastal convergence along the front. Highs Sunday
will be quite warm, in the low 90s for most inland and mid to
upper 80s east of about the I-95 corridor. Lows in the 70-75
degree range will be common Sunday Night.
Another northeast wind type of event sets up on Monday as high
pressure tries to build into the region from the north and
combines with offshore troughing associated with the nearly
stalled front. Drier air advection aloft will not be as
significant as with the previous event, and therefore expecting
more numerous showers with some embedded thunderstorms to stream
onshore Monday, especially over northeast FL, though moisture will
certainly be plentiful enough across GA for at least a 20-40%
chance of rain, especially closer to the coast/further south and
east you go. Beach/coastal hazards such as higher rip current
risk, elevated surf, and minor coastal flooding/beach erosion will
be on the rise Monday associated with the strong offshore pressure
gradient, which will also featuring breezy northeasterly winds in
the 10-20G25-30 mph range across much of the area. As expected
behind the front and with the breezy flow, high temps drop more
below normal as low to mid 80s will be common. Some showers
persist closer to the coast once again Monday Night with lows
ranging from the upper 60s north and west to low to mid 70s south
and east.
&&
.LONG TERM...
(Tuesday through next Saturday)
Issued at 127 PM EDT Sat Sep 6 2025
No significant changes with the pattern expected through at least
Wednesday as high pressure remains situated to the north of the
region and the highest shower/t`storm chances remain over
northeast FL and especially towards the coasts. Yet another
frontal boundary moves towards and into the region by the
Thursday/Friday time frame as long range guidance also suggests
upper troughing/a cut off low may dip as far south as into the
Gulf by Friday. This push both near the surface and aloft could
bring either another surge of drier air into the region if we end
up on the west side of the upper trough/low, or a feed of
southwesterly Gulf moisture on the east side of the upper
low/trough depending on how the pattern plays out. Either way, a
more October-like amplified pattern looks to stick around through
at least the next 7 days at this time. Temperatures trend near to
slightly below normal for the long term period.
&&
.AVIATION...
(00Z TAFS)
Issued at 818 PM EDT Sat Sep 6 2025
TEMPO for passing showers and MVFR conditions at SGJ over the next
several hours, otherwise multi-layered cloudiness prevails across
the terminals. ESE winds will become light and variable inland and
range between 5-10 kts at the coast. Continued with MVFR to brief
IFR stratus and shallow ground fog at inland terminals after 06z
with VCSH at coastal terminals. After daybreak coastal showers
increase and included PROB30s for TS in the afternoon.
&&
.MARINE...
Issued at 127 PM EDT Sat Sep 6 2025
Onshore flow pattern continues as a weak warm front lifts north
and stalls across the northeast Florida and coastal waters through
tonight. A cold front will approach from the north as the stalled
warm front morphs into a coastal trough on Sunday, increasing rain
and thunderstorm chances over the waters. By Monday, the cold
front reach the Georgia waters and send a surge of northeasterly
winds southward down the coast. A period of small craft advisory
conditions are possible Monday and Tuesday with gradually
weakening northeasterly winds Wednesday onward. The front will
continue toward south Florida through the week with a reinforcing
front pushing towards the local waters by next weekend.
Rip Currents: Moderate risk of rip currents through the weekend
with light onshore flow and surf/breakers around 2 feet. Still
expecting high risk of rip currents early next week with the
upcoming surge of NE winds on Monday/Tuesday along with
surf/breakers of at least 4-6 ft, with high surf headlines
possible.
&&
.HYDROLOGY...
Issued at 127 PM EDT Sat Sep 6 2025
Surge of NE winds early next week will combine with already above
normal astronomical tides due to the full moon and expect at least
Minor Coastal Flooding during high tide cycles along the Atlantic
Coastal beachfront locations as well as down the St. Johns River
Basin. Still too early to determine these water levels will reach
Moderate or greater flooding criteria next week.
&&
.PRELIMINARY POINT TEMPS/POPS...
AMG  71  91  69  83 /  10  40  30  30
SSI  74  87  74  82 /  10  40  40  60
JAX  74  90  74  85 /  20  50  30  80
SGJ  75  88  74  85 /  30  60  50  80
GNV  73  91  71  86 /  60  70  40  70
OCF  73  90  73  86 /  60  70  40  80
&&
.JAX WATCHES/WARNINGS/ADVISORIES...
FL...None.
GA...None.
AM...None.
&&
$$

NWS JAX Office Area Forecast Discussion