Funnel Cloud in Georgia, August 25, 2016

Area Forecast Discussion
National Weather Service Jacksonville FL
215 PM EDT THU AUG 25 2016

.NEAR TERM (Through Friday night)...

The deep layer ridge across the southeast U.S will gradually shift
north and be across Ohio/West Va by Friday night. The northeast flow
around the high coupled with a coastal trough will bring isolated
showers mainly to coastal northeast Fl tonight into early Friday
morning. Models continue to indicate an onshore flow with strong
subsidence aloft will prevail across much of the area Friday with
only low rain chances across the far south. With stronger subsidence
in the area...max temps expected to be warmer than today with
readings in the lower/mid 90s inland to the upper 80s along the
coast.

.SHORT TERM....Sat through Sun night...

Stacked high pressure will continue north of the region with dry air
(PWATs below 1 inch) and subsidence bringing dry conditions over SE
Ga while breezy onshore flow will focus waves of showers and
potentially isolated tstorms moving inland generally along and south
of a JAX to GNV line from the morning through the afternoon. Shower
activity expected to increase over the adjacent Atlantic waters Sat
night into Sun as low pressure 99L approaches south Florida and
drifts slowly WNW through Sun night. An inverted trough axis
extending north of the surface low will advanced toward the local
coastline through early Sun morning with a few showers moving inland
mainly along the NE Florida coast by sunrise.

By Sunday models diverge with the track and intensity of the low as
it nears south Florida and once again used NHC/WPC synoptic pattern
consensus which indicated the low drifting WNW over the eastern
GOMEX during this period. Despite the uncertainty with the low track
and evolution...the local area will continue to experience onshore
flow with increased coastal convergence. Rain chances will increase
from the ESE through Sun afternoon and into Sun night as the parent
surface low drifts westward across the SSE Gulf of Mexico. Expect
mainly showers with clusters of isolated thunderstorms with diurnal
enhancement.

Temperatures will range from the lower 90s well inland toward I-75
to the mid/upper 80s along the coast.Muggy and above normal minimum
temperatures will continue with lows in the mid/upper 70s inland to
near 80 along the coast and inland estuaries.

The extended period of onshore flow and building swells through the
weekend will increase the risk of rip currents. There will also be
an increased potential for elevated water levels along the coast due
to both the onshore flow and also above normal astronomical tides
with the new moon on Sept. 1st.

.LONG TERM...Mon through Thu...

Based on the latest WPC/NHC guidance for 99L...indicated above
normal rain chances spreading northward across the local forecast
area Mon-Thu as the circulation is progged at this time to track
northward across the eastern gulf coast region and then across the
deep south later in the week as it gets pick up by a mid latitude
trough. A low level trough axis will likely linger over the local
forecast area if the low follows this general track...and regardless
of storm structure/intensity. This trough axis combined with high
tropical moisture content (PWAT values potentially 2-2.5 inches)
will bring the potential for a widespread rainfall event across
portions of Florida and potentially SE Ga...especially along the
coast and across the Gulf Coast region. Also based on the latest
track guidance the local forecast area would be positioned on the
ENE side of the low circulation which is not only historically the
wetter side and also the more favored side for tornado formation.

Now is the time for local interests to closely monitor the latest
forecast guidance and ensure their emergency supply kits are
stocked. Review family emergency plans.

&&

.AVIATION...Prevailing VFR. VCSH at SSI and SGJ.

&&

.MARINE...Strong high pressure to the north of the waters will
provide an onshore flow to the waters into the first part of next
week. An exercise caution will probably be needed for the offshore
waters beginning Friday. Marine interests are advised to stay
informed on the latest forecasts of Invest 99L which may begin to
impact the waters early next week.

Rip Currents: Moderate risk at least through Friday due to a
moderate onshore flow.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  70  93  70  93 /  10  10   0  10
SSI  78  88  77  88 /  10  10  10  10
JAX  73  91  73  89 /  10  10  10  20
SGJ  78  88  77  87 /  20  20  20  30
GNV  72  91  72  91 /  10  20  10  20
OCF  73  91  73  91 /  10  20  10  30

&&

.JAX Watches/Warnings/Advisories...
FL...None.
GA...None.
AM...None.

&&

PP/AE/KG

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
430 AM EDT THU AUG 25 2016

AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040-124-125-
GAZ132>136-149>154-162>166-260845-
COASTAL WATERS FROM ALTAMAHA SOUND TO FERNANDINA BEACH FL OUT
20 NM-
COASTAL WATERS FROM FERNANDINA BEACH TO ST. AUGUSTINE FL OUT
20 NM-
COASTAL WATERS FROM ST. AUGUSTINE TO FLAGLER BEACH FL OUT 20 NM-
WATERS FROM ALTAMAHA SOUND GA TO FERNANDINA BEACH FL FROM 20 TO
60 NM-
WATERS FROM FERNANDINA BEACH TO ST. AUGUSTINE FL FROM 20 TO 60 NM-
WATERS FROM ST. AUGUSTINE TO FLAGLER BEACH FL FROM 20 TO 60 NM-
HAMILTON-SUWANNEE-COLUMBIA-BAKER-INLAND NASSAU-INLAND DUVAL-UNION-
BRADFORD-CLAY-ST. JOHNS-GILCHRIST-ALACHUA-PUTNAM-FLAGLER-MARION-
COASTAL NASSAU-COASTAL DUVAL-COFFEE-JEFF DAVIS-BACON-APPLING-
WAYNE-ATKINSON-WARE-PIERCE-BRANTLEY-INLAND GLYNN-COASTAL GLYNN-
ECHOLS-CLINCH-CHARLTON-INLAND CAMDEN-COASTAL CAMDEN-
430 AM EDT THU AUG 25 2016

...MODERATE RISK FOR RIP CURRENTS TODAY...

...ELEVATED RISK FOR RIP CURRENTS FRIDAY THROUGH THE WEEKEND...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST FLORIDA...
SOUTHEAST GEORGIA AND THE ADJACENT COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT...

NORTHEASTERLY WINDS AND LOCALLY ROUGH SURF WILL COMBINE
TO CREATE A MODERATE RISK OF RIP CURRENTS.

ISOLATED THUNDERSTORMS ARE POSSIBLE OVER NORTHEAST FLORIDA THIS
AFTERNOON.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

PERSISTENT ONSHORE WINDS AND EASTERLY OCEAN SWELL CREATE AN
ELEVATED RISK OF RIP CURRENTS AT AREA BEACHES THROUGH NEXT WEEK.

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS OVER NORTHEAST FLORIDA
ON FRIDAY. A BETTER CHANCE OF THUNDERSTORMS EXPECTED OVER THE
WEEKEND AND NEXT WEEK.

A TROPICAL DISTURBANCE IS PROJECTED TO APPROACH SOUTHERN FLORIDA
LATE SUNDAY AFTERNOON AND EVENING. THE NATIONAL HURRICANE CENTER
INDICATES A HIGH CHANCE OF DEVELOPMENT INTO A TROPICAL CYCLONE SO
WE WILL CONTINUE TO CLOSELY MONITOR THIS SYSTEM. IT IS IMPORTANT
THAT RESIDENTS REMAIN AWARE OF THE LATEST FORECASTS OF THIS SYSTEM
AS IT MOVES WEST NORTHWEST TO NORTHWEST NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE
IN JACKSONVILLE WEBSITE ON THE INTERNET AT WEATHER.GOV/JAX.