417
FXUS62 KJAX 020423
AFDJAX

Area Forecast Discussion
National Weather Service Jacksonville FL
1223 AM EDT Wed Sep 2 2026

.KEY MESSAGES...

For the latest NE FL and SE GA Daily Key Messages please visit:
https:/www.weather.gov/media/jax/briefings/nws-jax-briefing.pdf

- Daily Afternoon & Evening Thunderstorms Wednesday through
  Friday. Heavy Rainfall Potential Wed & Thurs for NE FL

- High Risk of Rip Currents for NE FL beaches

&&

.NEAR TERM /THROUGH TONIGHT/...
Highlights Today and Tonight:

- Localized Fog and low stratus early this morning inland areas

- Scattered to numerous storms across NE FL Today with gusty winds
and heavy downpours, mainly south of the I-10 corridor

Light NE flow early this morning over inland areas will lead to
another round of low stratus/patchy fog towards sunrise, with some
locally dense fog possible across inland SE GA and Suwannee Valley,
but widespread dense fog not expected. Otherwise, still expect
another day with trough over the Atlantic Coastal waters to push
onshore this morning with scattered showers and isolated storms and
some brief heavy downpours along the I-95 corridor, then with
diurnal heating this activity will spread inland with the East Coast
sea breeze that will tap into deep tropical moisture with PWATs over
2 inches across NE FL to produce numerous showers and storms with
gusty winds and heavy rainfall, with best chances of localized
flooding along the I-75 corridor of inland NE FL as this activity
meets the Gulf Coast sea breeze, and while the activity will be
moving steadily to the West at 10-15 mph, expect some isolated 2-3
inch amounts in the more intense storm activity along with a few
strong storms with gusty winds to 40-50 mph over inland areas.
Slightly lower PWATs below 2 inches across inland SE GA will likely
lead to lower coverage there with PoPs of 20-50%, while POPs of 60-
90% are expected across most of NE FL, especially south of the I-10
corridor. Max temps top out in the upper 80s/near 90F along the
Atlantic Coastal areas and I-95 corridor in the onshore flow and
earlier start to convection, with lower 90s inland, although some
middle 90s can be expected to the NW of Waycross over inland SE GA
where less convection is expected. Peak heat indices still fairly
typical for early September in the 100-105F range. Storms still on
track to end across inland areas around sunset, while the onshore
flow will keep ongoing scattered showers and storms over the
Atlantic Coastal waters through the overnight hours, with some
isolated convection reaching the coast at times late at night. Low
temps near seasonable values in the lower/middle 70s inland and
upper 70s along the Atlantic Coast.

&&

.SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/...
Main Highlights This Period:

- Daily shower and thunderstorm potential, with strong storms
possible over inland locations

Persistent onshore flow through the period will bring offshore
showers towards the coast during the early morning hours and then
towards inland locations by the afternoon hours. A more
southeasterly flow during this period will drive coverage of
showers and storms across NE FL and a majority of SE GA. Elevated
moisture levels, above 2", will bring the potential for periods of
heavy rainfall for any shower or storm that does develop. Currently,
chances of precipitation range in the 60% to 80% chances each day,
with the highest coverage of activity on Thursday. WPC continues to
highlight a Marginal Risk of Excessive Rainfall for all of NE FL and
a majority of SE GA on Thursday. The inland progression of the
Atlantic sea breeze will again bring increased chances for
thunderstorm development for central to western locations of NE FL
and SE GA each afternoon hours. Each evening to early morning hours
will have the potential for patchy inland fog.

Warmer temperatures away from the coast as daytime highs in the
upper 80s to lower 90s, and dewpoints in the mid to upper 70s each
afternoon will allow for Heat Index values to rise above 100F for
some locations during the late morning, with passing showers and
storms limiting temperatures from rising much.

&&

.LONG TERM /SATURDAY THROUGH TUESDAY/...
Main Highlights This Period:

- Daily Thunderstorms, Isolated Strong Storms Possible Inland.

Southwesterly-westerly flow develops this weekend ahead of a cold
front dipping along the southeastern US . By Saturday, with a shift
to a southwesterly flow, showers and storms will shift in from west
to east. Ahead of the cold front on Sunday, increased chances of
showers and storms for much of the area as moisture continues to be
brought in from the Gulf. The question remains how far south the
front will actually sink across the southeastern US and thus the FL
peninsula. But regardless, still expect to see good coverage of
showers and storms heading into Labor Day as the sea breezes move
inland during the afternoon hours with moisture aloft remaining
around the 2" range for PWATs.

Temperatures in the lower to mid 90s over the weekend, with Heat
index values rising over 100F could bring a chance for heat advisory
criteria to be met, but temperatures may be kept in check with
passing showers.

&&

.AVIATION /06Z WEDNESDAY THROUGH 06Z THURSDAY/...
Low stratus and fog will begin to develop away from the coast with
MVFR VSBY and IFR/LIFR CIGS at JAX, VQQ, and GNV between 08-10Z as
winds become calm while staying very light and easterly along the
coast with few to scattered CIGS 1.5-2.5 kft. VFR conditions will
resume after 13Z as east northeast winds increase over inland areas
to 5-8 knots. Coastal showers approaching from the east will move
onshore to SGJ by 10Z and shift towards CRG through 13Z. Scattered
showers and thunderstorms will press inland through the late morning
hours to JAX, then shift further inland to VQQ and GNV through 18-
19Z. Have PROB30 groups for morning showers moving onshore to
SGJ/CRG and then afternoon thunderstorm potential yielding MVFR
VSBY/CIGS. Rain and thunderstorm chances this afternoon will be
greatest over Northeast Florida with diminished coverage over
Southeast Georgia, so only have VCSH there. Shower coverage will
diminish by 23Z, but sooner near the coast. VFR conds will linger
through sunset and into the evening hours at the end of the TAF
period.

&&

.MARINE...


Onshore flow and troughing over the waters will keep the potential
for waves of showers and isolated thunderstorms in the forecast
through Friday. Winds transition and shift westerly by Saturday
Night into Sunday as a frontal boundary enters the southeast states.
Several rounds of showers and thunderstorms are possible during the
upcoming weekend and into early next week as the frontal boundary
stalls over the local waters.

Rip Currents: Slight uptick in longer period swells will push surf
into the 3-4 ft range for the NE FL beaches and will post a High
Risk of Rip Currents for both Today and Thursday, but will maintain
a Moderate Risk for the SE GA beaches with surf of 2-3 ft.

&&

.FIRE WEATHER...
     PATCHY LOW DISPERSIONS OVER NORTH CENTRAL FLORIDA TODAY AND
- Friday
     LOW DISPERSIONS ALONG THE COAST FRIDAY AND THIS WEEKEND..

Onshore flow continues through midweek bringing early morning
showers across coastal locations, and then towards inland locations
as the Atlantic sea breeze moves inland. By the afternoon hours,
amplified showers and thunderstorms will be possible with diurnal
heating. With weaker winds aloft, dispersions will continue to
generally be in the poor to fair range much of the week,
particularly over north central FL, and coastal locations by this
weekend. Moisture advecting in from the Atlantic will help maintain
Good min RH values across the area.

Fog Potential: Gusty and erratic winds can be expected in and near
thunderstorms with briefly localized flooding rainfall. Late night
and early morning patchy fog and low stratus will be possible,
especially in areas that received more rainfall.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  94  73  90  73 /  20  10  70   0
SSI  87  78  88  78 /  30  20  60  10
JAX  89  75  89  75 /  40  30  60  10
SGJ  87  76  87  76 /  70  40  50  10
GNV  89  74  90  73 /  90  40  70  30
OCF  89  73  91  74 /  90  40  80  30

&&

.JAX WATCHES/WARNINGS/ADVISORIES...
FL...High Risk for Rip Currents through Thursday evening for FLZ124-125-
     138-233-333.
GA...None.
MARINE...None.

&&

$$