Area Forecast Discussion
Issued by NWS Wilmington, NC
FXUS62 KILM 280518
Area Forecast Discussion
National Weather Service Wilmington NC
118 AM EDT SUN AUG 28 2016
Warm late summer conditions will prevail through the weekend.
Showers will increase across the area as moisture of tropical
origins moves onshore through early next week. A strong cold
front is expected to move across the Carolinas late this week.
.NEAR TERM /UNTIL 6 AM THIS MORNING/...
As of 118 AM Sunday...Latest KLTX 88D indicates pcpn dissipating
across land areas of the ILM CWA. Will continue isolated for the
far western inland counties thru 1 to 2 am.
Isolated offshore and nearshore upstream showers have developed
and are moving to the SW. Over land, POPs have been dropped for
the remainder of this evening. However, will need low POPs for the
immediate coast toward sunrise for any pcpn that develops over the
adjacent waters that may have a tendency to move onshore. Current
min fcst looks aok, no tweaks needed at this time. Will also up
the cloud coverage along the immediate coast to partly cloudy.
.SHORT TERM /6 AM THIS MORNING THROUGH MONDAY NIGHT/...
As of 315 PM Saturday...The remnants of long-dead Fiona, now
manifesting itself as a loosely organized low with some tropical
features, is forecast to drift slowly west towards the local area
through the period as either a tropical-like wave or a weak low
pressure system. Due to the weakness of this feature, its slow
westward movement and poor prospects for development it is expected
that there will be little to no impact on the local area during the
short term. We will see a gradual return of deep moisture through
the period and improved chances for mainly diurnal convection.
Sunday looks to be the better day for rain chances as subsidence and
dry air to the west of the aforementioned system will help suppress
convection. Daytime temperatures will be seasonal or even a little
below depending upon extent of cloud cover. Nighttime temperatures
will remain a bit above normal with dewpoints remaining elevated in
the lower to mid 70s.
.LONG TERM /TUESDAY THROUGH SATURDAY/...
As of 315 PM Saturday...Uncertainty is the theme for the extended
as several components namely tropical or possible tropical
entities are poised to affect the area. First, the moisture and
system moving across the Caribbean may shift to the north and west
and link up with yet another system, the remants of Fiona which
are forecast to move due east with possible redevelopment. A mid
level low churning off the southeast coast will be modulating the
moisture for the most part. Usually with systems similar to these,
the moisture remains mostly confined to the eastern half of the
system as continental air is just too much to overcome with weak
advection. Overall the strategy of chance to isolated pops for
Tuesday and Wednesday looks good with higher values along the
The end of the period is suddenly looking a bit messy as well. The
mid level trough that pushes a front through the area Friday and
Saturday looks somewhat weaker and mid level drying remains to the
north. I have incrementally increased pops and cloud cover to
Temperature forecast is at the mercy of the moisture and is low
confidence as well but didn`t make wholesale changes from the
.AVIATION /05Z SUNDAY THROUGH THURSDAY/...
As of 00Z...There is a chance of VCTS and MVFR from
reduced visibilities on convection northeast of KLBT that will move
across by02 utc. Also these scattered thunderstorms have a smaller
chance of moving across KFLO as heating of the day wanes. In any case
will include VCTS for both sites through at least 03 UTC.
With northeast flow expected in the lower levels tonight there is
a Chance for low level stratus before daybreak. Confidence is not
high as the low level flow weakens at all sites later tonight.
Have included a scattered deck of stratus generally after 09 utc.
Also will include MVFR for BR at KFLO and KILM.
After sunrise winds are expected to be from the northeast to east
at less than 10 knots with a broken deck of clouds at or above
EXTENDED OUTLOOK...Increasing chance of TEMPO sub VFR each day as
tropical moisture/shower potential increases through Tuesday. VFR
NEAR TERM /THROUGH TONIGHT/...
As of 118 AM Sunday...Included mention of E swell in CWF product.
High pressure will re- establish its ridging from the NE states
tonight. This will result in east winds around 5 kt becoming east
to northeast around 10 kt toward morning. Exception is nearshore
thru the mid to late evening hrs, where the sea breeze has
produced a fading e to se wind at 10 to 15 kt. Have backed down on
the pcpn coverage to isolated and that will mainly occur during
the pre- dawn Sunday hours. Significant seas will run 2 to 4 ft
which have mainly been a function of a 2 to 4 foot swell at 9
second periods mainly from the remnants of Fiona. This will
continue thru the overnight with wind-driven waves having little
input, other then a small chop on top of the swell.
SHORT TERM /SUNDAY THROUGH MONDAY NIGHT/...
As of 315 PM Saturday...The remnants of long-dead Fiona,
now manifesting itself as a loosely organized low with some
tropical features, is forecast to drift slowly west towards the
waters through the period as either a tropical-like wave or a weak
low pressure system. Due to the weakness of this feature, its slow
westward movement and poor prospects for development it is
expected that there will be little impact upon the local waters.
Expect NE to E winds in the 10 to 15 kt range through the short
term. Seas will stay mainly in the 3 or 4 ft range, although some
5 footers over our outer waters are possible due to the
contribution of swell energy from distant yet slowly strengthening
LONG TERM /TUESDAY THROUGH THURSDAY/...
As of 315 PM Saturday...With all that may be going on the winds
will be somewhat benign. For Tuesday and into early Wednesday
winds will be mostly from the northeast and ten knots or less. A
weak pattern later Wednesday will be followed by a possible
frontal passage Thursday with a shift to northwest winds. Not much
in the way of CAA with the front so speeds remain ten knots or
less. Significant seas will be 2-4 feet but longer period swell
may continue to warrant some rip current hazards.