Area Forecast Discussion
Issued by NWS Wilmington, NC

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FXUS62 KILM 281930
AFDILM

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON NC
329 PM EDT THU MAY 28 2015

.SYNOPSIS...
SEASONABLE WEATHER WILL PREVAIL MUCH OF THE PERIOD AS WEAK HIGH
PRESSURE REMAINS OFFSHORE. DRY AIR ALOFT WILL LIMIT PRECIPITATION
WITH ONLY ISOLATED ACTIVITY ANTICIPATED THROUGH THE WEEKEND. AN
APPROACHING BUT WEAKENING COLD FRONT WILL BRING A SLIGHTLY BETTER
CHANCE OF RAINSHOWERS AND A FEW THUNDERSTORMS EARLY NEXT WEEK.

&&

.NEAR TERM /THROUGH TONIGHT/...
AS OF 315 PM THURSDAY...DRIER DESCENDING AIR ALOFT CONTINUES TO
CAP SURFACE-BASED AIR PARCEL CLIMBS. ACROSS THE DEEPER INTERIOR
WHERE HIGHER COLUMN MOISTURE WILL LINGER LONGER...A FEW ISOLATED
SHOWERS REMAIN POSSIBLE THROUGH AFTERNOON.

A BAND OF DRY SUBSIDENT AIR ACROSS THE WESTERN PERIPHERY OF A
LANDWARD MIGRATING WESTERN ATLANTIC UPPER LOW WILL CURTAIL
CONVECTIVE CHANCES ACROSS SE NC AND NE SC. ISOLATED ACTIVITY
HOWEVER CANNOT BE RULED OUT OVER FAR INLAND SE NC NEAR I-95
AND ALONG THE NC/SC STATE LINE WHERE STRONG LOW-LEVEL HEATING
IS OCCURRING PRIOR TO BETTER MID-LVL DRYING. THIS ACTIVITY WOULD
LIKELY BE SHOWERS ONLY IF NOT JUST MODERATE CUMULUS. GREATER
COVERAGE WILL REMAIN N AND W OF OUR AREA INTO CENTRAL NORTH
CAROLINA. ANY SHOWERS THAT LINGER INTO EARLY EVENING WILL LIKELY
BE LOCATED WELL INLAND...POSSIBLY TOUCHING MARLBORO OR DARLINGTON
COUNTY. LOWER DEWPOINTS...CLEAR SKIES AND LIGHT WIND MAY RESULT IN
PATCHY FOG INTO THE PRE-DAWN OF FRIDAY. SLIGHTLY LOWER MINIMUMS
WILL RESULT AS WELL...DIPPING TO 63-66 INLAND...64-68 CLOSER TO
THE COAST.

&&

.SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/...
AS OF 3 PM THURSDAY...HIGH PRESSURE WILL RIDGE INTO THE AREA FROM THE
NORTH AND EAST THROUGH THE PERIOD WHILE A WEAK AREA OF LOW PRESSURE
ALOFT PERSISTS OFFSHORE.  GENERALLY EXPECT DRY WEATHER UNDER PARTLY
CLOUDY SKIES...THOUGH A STRAY SHOWER OR STORM IS POSSIBLE EACH DAY.
HIGHS EACH DAY WILL BE IN THE MID TO UPPER 80S WITH COOLER VALUES NEARER
THE BEACHES.  LOWS EACH NIGHT WILL BE IN THE MID 60S TO AROUND 70.

&&

.LONG TERM /SUNDAY THROUGH THURSDAY/...
AS OF 3 AM THURSDAY... PATTERN CHANGES TAKING SHAPE ON SUNDAY
COMPARED TO THE RELATIVELY TRANQUIL SHORT TERM. LOW LEVEL MOISTURE
WILL INCREASE SLIGHTLY BUT PERHAPS MORE IMPORTANTLY THE LIGHT MID
LEVEL FLOW WILL BE TAKING ON A WEAK SOUTHWESTERLY COMPONENT AHEAD OF
A SLOW MOVING SOUTHERN BRANCH TROUGH CROSSING THE MS VALLEY. WITH
THESE FACTORS TAKING SHAPE SO GRADUALLY SUNDAY STILL LIKELY ONLY
BRINGS SLIGHT CHANCE POPS OVER MAINLY WESTERN ZONES. PREVIOUS MODELS
RUNS SUGGESTED THAT THE UPPER WAVE IN THE SOUTHERN BRANCH HELPED
INCREASED MOISTURE THAT A BACKDOOR FRONT BEING PUSHED BY THE
NORTHERN BRANCH MAY INTERACT WITH. AND WHILE THIS BOUNDARY SHOULD
STILL SAG INTO THE AREA FOR SOME UNSETTLED WEATHER TUESDAY AND/OR
WEDNESDAY IT APPEARS THAT IT WILL HAVE LITTLE HELP FROM THE SOUTHERN
SYSTEM. RATHER, THIS FEATURE NOW APPEARS TO CUT OFF AND STALL. OF
NOTE THIS TROUGH MAY BE INSTRUMENTAL BEYOND THE LONG TERM SETTING
THE STAGE FOR HYBRID OR TROPICAL DEVELOPMENT IN THE EASTERN
GOMEX...POSSIBLY AFFECTING THE REGION LATE NEXT WEEK.

&&

.AVIATION /18Z THURSDAY THROUGH TUESDAY/...
AS OF 18Z...VFR/SCATTERED LOW/MID CLOUDS AT THE TERMINALS THIS
AFTERNOON WITH SE WINDS AROUND 10 KT. PER KLTX RADAR SHOWERS ARE
DECREASING NEAR THE INLAND TERMINALS AND DEVELOPING FURTHER TO THE
NW. FOLLOWING THE TRENDS SUGGESTED BY THE HRRR MODEL IT APPEARS
THERE IS LESS LIKELIHOOD OF VCSH AT THE INLAND TERMINALS THIS
AFTERNOON.

THIS EVENING...WINDS SLOWLY DROP BACK TO 5 KT OR LESS. AFTER 08Z
MVFR FOG POSSIBLE AT THE INLAND TERMINALS WITH MVFR VSBYS APPEAR
MOST LIKELY. AFTER 08Z THERE WILL BE AN INCREASED CHANCE OF SHOWER
ACTIVITY MOVING INTO THE COASTAL TERMINALS FROM THE ATLANTIC. ATTM
DUE TO DRY MID LEVELS ANY PRECIPITATION SHOULD BE LIGHT AND ISOLATED
....BUT LOW VFR/HIGH MVFR CIGS WILL BR POSSIBLE AT LEAST THROUGH
MID MORNING.

EXTENDED OUTLOOK...TYPICAL EARLY SUMMER PATTERN WITH MORNING FOG AND
MAINLY AFTERNOON ISOLATED/SCATTERED SHOWERS AND STORMS. OTHERWISE
EXPECT VFR.

&&

.MARINE...
NEAR TERM /THROUGH TONIGHT/...
AS OF 315 PM THURSDAY...FRIENDLY MARINE ENVIRONMENT PREVAILS WITH
RELATIVELY LIGHT ONSHORE WIND AND ESE WAVES 2-3 FEET EVERY 7-8
SECONDS. THIS REGIME WILL CONTINUE OVERNIGHT WITH NO TSTMS OR
RESTRICTIONS TO VISIBILITY EXPECTED. ISOLATED SHOWERS INTO EARLY
FRIDAY MAY DOT THE WATERS...BUT ANY ENCROACHMENT OVER THE 0-20NM
WATERS FROM THE EAST WILL BE ISOLATED AT BEST.

SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/...
AS OF 3 PM THURSDAY...WEAK E-SE FLOW IS EXPECTED THROUGH THE PERIOD
AT SPEEDS GENERALLY AOB 15 KT.  SEAS WILL RUN 2 TO 3 FEET OVER
MUCH OF THE WATERS WITH 4 FOOTERS ON TAP AT 20 NM BEGINNING FRIDAY
EVENING.

LONG TERM /SUNDAY THROUGH MONDAY/...
AS OF 3 AM THURSDAY... THE CONTINUED GRADUAL RETREAT OF WEST
ATLANTIC HIGH PRESSURE RIDGE AXIS WILL LEAD TO A SLOW VEERING
THROUGH THE PERIOD. WIND SPEEDS WILL REMAIN LIGHT...GENERALLY 10 KTS
OR LESS. THERE WILL LIKELY NOT BE MUCH CHANGE IN THE SEAS ALTHOUGH
THE BREAKING DOWN OF THE FETCH MAY DECREASE THE SWELL ENERGY. THIS
WILL BE SLIGHT HOWEVER AND MAY ONLY MANIFEST AS A SMALL DECREASE IN
WAVE PERIOD RATHER THAN PREDOMINANT WAVE HEIGHT.

&&

.ILM WATCHES/WARNINGS/ADVISORIES...
SC...NONE.
NC...NONE.
MARINE...NONE.

&&

$$

NEAR TERM...MJC
SHORT TERM...31
LONG TERM...MBB
AVIATION...MRR/8



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