Area Forecast Discussion
Issued by NWS Newport/Morehead, NC

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000 FXUS62 KMHX 172314 AFDMHX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEWPORT/MOREHEAD CITY NC 714 PM EDT THU APR 17 2014 .SYNOPSIS... HIGH PRESSURE EXTENDING DOWN THE EASTERN SEABOARD WILL WEAKEN AND MOVE NORTHEAST FRIDAY. LOW PRESSURE WILL DEVELOP IN THE GULF OF MEXICO FRIDAY. THE LOW WILL MOVE OFF THE SOUTHEAST COAST SATURDAY NIGHT. IT WILL CONTINUE TO SLOWLY MOVE NORTHEAST EARLY NEXT WEEK. A COLD FRONT WILL MOVE THROUGH TUESDAY NIGHT. HIGH PRESSURE WILL BUILD IN WEDNESDAY AND THURSDAY. && .NEAR TERM /UNTIL 6 AM FRIDAY MORNING/... AS OF 700 PM THU...LOWERED OVERNIGHT MINS SLIGHTLY TO NR 40 WELL INLAND AND MID TO UPR 40S COAST...OTRW INIT FOR CURRENT CONDS. M MODELS IN VERY GOOD AGREEMENT IN THE SHORT TERM. NARROW RIDGE OF HIGH PRESSURE WILL CONTINUE TO EXTEND DOWN THE EASTERN SEABOARD. LOW PRESSURE DEVELOPING IN THE GULF OF MEXICO LATE TONIGHT WILL BEGIN TO SPREAD LOW LEVEL MOISTURE INTO THE AREA. LOW TEMPS WILL RANGE FROM LOWER 40S COASTAL PLAIN TO LOWER 50S OUTER BANKS. && .SHORT TERM /6 AM FRIDAY MORNING THROUGH 6 PM FRIDAY/... AS OF 330 PM THU...MOISTURE CONTINUES TO INCREASE. MODELS SHOW THETA-E RIDGE BUILDING IN FROM THE EAST SOUTHEAST. ISENTROPIC LIFT WILL INCREASE AS THE LOW MOVES EAST NORTHEAST AND EXPECT LIGHT RAIN TO SPREAD IN DURING THE AFTERNOON OVER THE SOUTHERN COUNTIES AND ADJACENT COASTAL WATERS. HIGHS RANGE FROM THE UPPER 50S NORTHERN OUTER BANKS TO MID 60S SOUTHWEST. && .LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/... AS OF 330 PM THU...DEEP TROF MOVING THRU THE GULF COAST REGION WILL CUT OFF THEN MOVE THRU THE DEEP SOUTH AND OFF THE SE COAST. THIS WILL SET UP A MAINLY CLOUDY AND WET PATTERN OVER THE FORECAST AREA FOR MUCH OF THE UPCOMING WEEKEND. RAIN WILL BEGIN TO SPREAD INTO EASTERN NC AS AN AREA OF ISENTROPIC AND DEEP MOISTURE APPROACHES FROM THE SOUTH FRI NIGHT WELL AHEAD OF THE MAIN UPPER CUTOFF LOW. HAVE RAMPED UP POPS TO LIKELY OVER ALL BUT FAR NORTHERN AREAS (WHICH IS ON THE NORTHERN FRINGES OF THE MAIN PRECIP AREA) LATER FRI NIGHT THRU SATURDAY MORNING. THERE ARE STILL MODEL DIFFERENCES IN THE NORTHERN EXTENT OF PRECIP SHIELD PARTICULARLY WITH THE DRIER NAM SOLUTION SO POPS MAY NEED TO BE ADJUSTED AS DETAILS CAN BE FURTHER DEFINED WITH LATER MODEL RUNS. TEMPS WILL COOL INTO THE UPPER 40S INLAND TO LOW TO MID 50S COAST FRIDAY EVENING BEFORE LEVELING OR RISING TOWARD SATURDAY MORNING. TEMPERATURES MAY STRUGGLE TO REACH INTO THE LOW TO MID 60S SATURDAY DEPENDING ON HOW MUCH PRECIP OVERSPREADS THE AREA. THE UPPER LOW GRADUALLY MOVES OFF THE SE COAST AND INTO THE WESTERN ATLANTIC DURING THE LATTER HALF OF THE WEEKEND. THIS SLOWER MOVEMENT LENDS ITSELF TO A CLOUDY AND POTENTIAL WET SUNDAY PARTICULARLY FOR COASTAL AREAS. THE FORECAST WILL SHOW A GRADUAL DECREASE IN POPS FROM NW TO SE FROM LATE SATURDAY THRU SUNDAY NIGHT AGAIN IN DEFERENCE TO THE DRIER NAM SOLUTION BUT GUT FEELING IS THAT CLOUDIER COOLER AND WETTER SUNDAY WILL OCCUR GIVEN THE OVERALL MORE PESSIMISTIC MODEL TRENDS. AGAIN FORECAST DETAILS CAN BE ADJUSTED AS LATER MODEL RUNS COME INTO MORE ALIGNMENT. THERE MAY BE A SHARP GRADIENT OF RAINFALL FROM NORTH TO SOUTH BUT IF THE WETTER MODELS SOLUTIONS HOLD, RAINFALL AMOUNTS CUD EXCEED AN INCH OR MORE OVER SOUTHERN AREAS THIS WEEKEND. THERE IS DECENT MODEL AGREEMENT FOR CLEARING SKIES AND TEMPERATURES AT MORE SEASONABLE LEVELS EARLY NEXT WEEK. MILDER LOW LEVEL SW FLOW WILL INCREASE AHEAD OF AN UPPER TROF APPROACHING FROM THE NW TUESDAY INTO TUESDAY NIGHT. WILL CAP POPS AT SLIGHT CHANCE FOR THIS FORECAST PERIOD FOR NOW GIVEN THE LACK OF MOIST INFLOW GIVEN MID LEVEL WNW FLOW. MIDWEEK WEATHER LOOKS DRY AND SEASONABLE AS UPPER RIDGE BUILDS TOWARD THE EAST COAST. && .AVIATION /23Z THURSDAY THROUGH TUESDAY/... SHORT TERM /TONIGHT & FRI/ AS OF 7 PM THU...VFR THROUGH THE SHORT TERM. GUSTY NORTHEAST WINDS WILL DIMINISH QUICKLY THIS EVENING THEN LESS THAN 10 KNOTS OVERNIGHT. MOSTLY CLEAR THIS EVENING BUT INCREASING LOW LEVEL MOISTURE FORECAST AFTER MIDNIGHT AND CONTINUING DURING THE DAY FRIDAY. CEILINGS DEVELOPING IN THE PREDAWN HOURS FRIDAY AROUND 5 KFT. SOME LIGHT RAIN POSSIBLE IN THE AFTERNOON FRIDAY AT SOUTHERN TERMINALS OAJ AND EWN...WITH ISO AND PGV REMAINING DRY. NORTHEAST WINDS DURING THE DAY REMAINING AROUND 10 KNOTS. LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/... AS OF 330 PM THU...AS RAIN SPREADS NE INTO THE AREA FRI NIGHT INTO SAT EXPECT REDUCED FLIGHT CATEGORIES ESPCLY SRN TIER WHERE BEST CVRG OF RAIN EXPECTED. AS LOW PRES DRIFTS FURTHER OFFSHORE TO THE SE SUNDAY, VERY GRADUAL IMPROVEMENT EXPECTED WITH MAINLY VFR RETURNING BY LATE SUNDAY INTO MONDAY. && .MARINE... SHORT TERM /TONIGHT & FRI/ AS OF 700 PM THU...MAIN CHANGE TO EXTEND SCA FOR ALBEMARLE AND ALLIGATOR RIVER THROUGH THIS EVE. MODELS REMAIN IN VERY GOOD AGREEMENT IN THE SHORT TERM. NORTHEAST FLOW CONTINUES IN BETWEEN HIGH PRESSURE EXTENDING DOWN THE EASTERN SEABOARD AND A STATIONARY FRONT OVER THE OFFSHORE WATERS. SMALL CRAFT ADVISORIES WILL CONTINUE THROUGH EARLY NEXT WEEK FOR THE COASTAL WATERS. LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/... AS OF 330 PM THU...STRONG HIGH PRES EXTENDING INTO THE CAROLINAS FRI NIGHT WILL MAINTAIN NNE WINDS OF 15 TO 25 KTS NEAR THE CST. AS LOW PRES SLIDES ENE TO THE S SAT INTO SUN EXPECT THE GUSTY NNE WINDS TO CONT POSS GUSTING 25 TO 30 KTS OUTER WATERS. THE NE WINDS WILL SLOWLY DIMINISH MON AS THE LOW MOVES FURTHER OFFSHORE AND HIGH PRES WEAKENS AS IT BUILDS TOWARD CST. THE PERSISTENT NE FLOW WILL KEEP SEAS ELEVATED THRU THE PERIOD WITH SCA OVER THE COASTAL WATERS CONT INTO MON NIGHT. SEAS WILL PEAK AT 8 TO 12 FEET OVER THE OUTER WATERS LATE SAT THRU SUNDAY. THEN SLOWLY SUBSIDE TO 4 TO 6 FT MON NIGHT. && .MHX WATCHES/WARNINGS/ADVISORIES... NC...NONE. MARINE...SMALL CRAFT ADVISORY UNTIL 8 PM EDT FRIDAY FOR AMZ135. SMALL CRAFT ADVISORY UNTIL MIDNIGHT EDT TONIGHT FOR AMZ130-131. SMALL CRAFT ADVISORY UNTIL 6 AM EDT TUESDAY FOR AMZ150-152-154. SMALL CRAFT ADVISORY UNTIL 1 AM EDT TUESDAY FOR AMZ156-158. && $$ SYNOPSIS...HSA NEAR TERM...JAC/HSA SHORT TERM...HSA LONG TERM...BTC AVIATION...JAC/BTC/HSA MARINE...JAC/BTC/HSA

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