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-- Discussion containing changed information from previous version are highlighted. --
000
FXUS62 KMHX 180516
AFDMHX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEWPORT/MOREHEAD CITY NC
116 AM EDT SAT MAY 18 2013

.SYNOPSIS...
-- Changed Discussion --
A WEAK BACK DOOR COLD FRONT WILL REMAIN STALLED ACROSS THE REGION
INTO SATURDAY...THEN WILL RETREAT TO THE NORTH AS A WARM LATE
SATURDAY. ATLANTIC HIGH PRESSURE WILL BUILD INTO THE AREA EARLY
NEXT WEEK.
-- End Changed Discussion --

&&

.NEAR TERM /UNTIL 6 AM THIS MORNING/...
-- Changed Discussion --
AS OF 110 AM SATURDAY...ISOLD TO SCT CONVECTION MOVING ACROSS
NERN SXNS EARLY THIS MORN. WILL KEEP LOW POPS OVERNIGHT MAINLY SHRA.
NO SIG CHANGES.

PREV DISC...MODELS IN GOOD AGREEMENT IN ADVECTING MOISTURE ACROSS THE
REGION OVERNIGHT WITH THE FRONTAL BOUNDARY LIFTING NORTH TO THE
US64 CORRIDOR PROVIDING WEAK SFC CONVERGENCE. CONFIDENCE IN THE
MODELS NOT BEST AS IT HAS BEEN OVERDOING PCPN OF LATE BUT WILL
MAINTAIN SLT CHC/CHC POPS FOR NORTHERN AREAS. LOWS MAINLY IN THE
MID-UPPER 60S.
-- End Changed Discussion --

&&

.SHORT TERM /6 AM THIS MORNING THROUGH 6 PM SUNDAY/...
AS OF 330 PM FRI...THE SFC BOUNDARY PROGGED TO REMAIN QUASI-
STATION ACROSS THE NRN COUNTIES MUCH OF THE DAY WHILE MID LEVEL
HEIGHTS GRADUALLY FALLS AS WEAK TROUGHING APPROACHES FROM THE
WEST. MODELS CONTINUE TO ADVERTISE CHC POPS INLAND AND NRN TIER
WITH MODERATE INSTABILITY THROUGH PEAK HEATING WITH CONVERGENCE
ALONG THE FRONTAL AND SEABREEZE BOUNDARIES ONCE AGAIN. FLOW
BECOMES SELY THROUGH THE DAY WHICH SHOULD BRING HIGHER DEWPOINTS
AND BETTER INSTABILITY SO EXPECTING A BETTER COVERAGE OF
CONVECTION TOMORROW. ONSHORE FLOW EXPECTED SLIGHTLY COOLER TEMPS
TOMORROW WITH MID 80S INLAND AND MID TO UPPER 70S COAST.

&&

.LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/...
AS OF 230 PM FRIDAY...WEAK TROUGHING ALOFT SUNDAY AND MONDAY
COUPLED WITH INCREASED LOW-LEVEL MOISTURE AS A WARM FRONT SURGES
NORTH SHOULD LEAD TO ELEVATED CHANCES OF SHOWERS AND A FEW TSTMS
SUNDAY AND MONDAY WITH HIGH CHANCE POPS ON SUNDAY AFTERNOON AND
CHANCE ON MONDAY. RIDGING ALOFT SHOULD LIMIT PRECIPITATION ACROSS
THE REGION TUESDAY AND WEDNESDAY...WITH ONLY DIURNALLY DRIVEN
SHOWERS AND TSTMS AROUND TUESDAY AND NO POP FOR WEDNESDAY. AS A
COLD FRONT APPROACHES ON THURSDAY ACCOMPANIED BY A BROAD MID-LEVEL
TROUGH...MOISTURE SHOULD INCREASE FROM THE SOUTH WITH AGAIN POPS
RAMPING UP AGAIN THURSDAY AFTERNOON AND ESPECIALLY THURSDAY NIGHT
INTO FRIDAY.

WITH NO REAL COOL AIR INTRUSIONS THROUGH THE EXTENDED
PERIOD...TEMPERATURES SHOULD REMAIN FAIRLY STEADY WITH DAYTIME
HIGHS GENERALLY IN THE LOWER TO MIDDLE 80S INLAND AND UPPER 70S
ALONG THE COAST AND NIGHTTIME LOWS IN THE MIDDLE 60S.

&&

.AVIATION /05Z SATURDAY THROUGH WEDNESDAY/...
SHORT TERM /THROUGH SATURDAY/...
AS OF 1010 PM FRIDAY...FRONTAL BOUNDARY REMAINS STALLED ACROSS THE
REGION TONIGHT...THEN GRADUALLY LIFTS NORTH SATURDAY. MODELS
INDICATE SHOWERS POSSIBLY CONTINUING NRN RTES...ALONG THE US64/264
CORRIDORS...THROUGH MUCH OF THE OVERNIGHT AS MOISTURE AND WEAK
TROUGHING APPROACH FROM THE WEST. VFR CONDITIONS EXPECTED TO
DOMINATE OUTSIDE ISOLD TO SCT CONVECTION...ALTHOUGH COULD SEE
LIGHT FOG DEVELOP LATE TONIGHT...ESPECIALLY IN AREAS THAT RECEIVE
PCPN THIS EVENING. ISOL-SCT CONVECTION POSSIBLE AGAIN SAT
AFTERNOON.

LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
AS OF 230 PM FRI...WHILE MOST OF THE TIME WILL FEATURE VFR
CONDITIONS...SCATTERED SHOWERS OR TSTMS COULD RESULT IN BRIEF
DROPS TO MVFR...ESPECIALLY SUNDAY AND MONDAY. GIVEN LIGHT WINDS
AND DEEP LOW-LEVEL MOISTURE...NIGHTTIME STRATUS AND FOG IS ALSO
POSSIBLE THROUGH THE PERIOD WITH DROPS TO MVFR AND PERHAPS IFR
STATUS.

&&

.MARINE...
-- Changed Discussion --
SHORT TERM /THROUGH SATURDAY/...
AS OF 110 AM FRIDAY...NO SIG CHANGES. THE BACKDOOR COLD FRONT
REMAINS STALLED ACROSS THE CENTRAL WATERS EARLY THIS MORN WITH ELY
FLOW MAINLY 10 KTS OR LESS OCRACOKE NORTH AND SE FLOW AOB 10 KT TO
THE SOUTH WITH SEAS AROUND 2 TO 3 FT. EXPECT SIMILAR CONDITIONS
THROUGH TONIGHT...THEN THE FRONTAL BOUNDARY WILL BEGIN TO SLOWLY
LIFT NORTH ON SATURDAY WITH WINDS BECOMING SE 10-15 KT ACROSS THE
NORTHERN WATERS AND SOUTH 10-15 KT ACROSS THE SOUTHERN WATERS.
SEAS WILL BE 2-4 FT SATURDAY.

LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
AS OF 240 PM FRIDAY...WINDS WILL FEATURE A SOUTHERLY COMPONENT
THROUGHOUT THE EXTENDED PERIOD WITH HIGH PRESSURE CENTERED
OFFSHORE AND MOST DISTURBANCES PASSING TO THE NORTH OF THE REGION.
A FRONT WILL FINALLY PASS SOUTH OF THE AREA NEXT WEEKEND. PER
LATEST WAVEWATCH AND LOCAL NWPS...WAVES SHOULD BE IN THE 2 TO 4
FOOT RANGE...BUT MAY BRIEFLY INCREASE TO 4 TO 6 FEET MONDAY AND
MONDAY NIGHT OVER THE CENTRAL WATERS AS THE GRADIENT TIGHTENS A
BIT AHEAD OF A MID-LEVEL SHORTWAVE.
-- End Changed Discussion --

&&

.MHX WATCHES/WARNINGS/ADVISORIES...
NC...NONE.
MARINE...NONE.

&&

$$
SYNOPSIS...SK
NEAR TERM...JAC/HSA/SK
SHORT TERM...SK
LONG TERM...CTC
AVIATION...JAC/CTC/HSA/SK
MARINE...JAC/CTC/HSA/SK