Area Forecast Discussion
Issued by NWS Upton, NY

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000 FXUS61 KOKX 182345 AFDOKX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW YORK NY 745 PM EDT TUE JUN 18 2013 .SYNOPSIS...
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A COLD FRONT SLOWLY PUSHES SOUTH THROUGH THE TRI STATE AREA TONIGHT. HIGH PRESSURE BUILDS IN BEHIND THE FRONT AND REMAINS IN CONTROL THROUGH THE END OF THE WEEK. A WEAK COLD FRONT APPROACHES ON SATURDAY...STALLING OVER OR NEAR THE AREA INTO EARLY NEXT WEEK.
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&& .NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/... AT 22Z...OBS INDICATED COLD FRONT WAS EXTENDING IN A LINE FROM JUST S OF THE CT COAST TO JUST N OF KTEB/KCDW. SHOWER AND TSTM ACTIVITY HAS DIMINISHED ACROSS THE AREA EARLY THIS EVENING AS IT ENCOUNTERED A MORE STABLE MARITIME AIRMASS AND HAS TRANSITIONED TO MORE OF A STRATIFORM RAIN. THIS WIDESPREAD RAINFALL WILL CONTINUE TO PUSH SE TONIGHT AS THE FRONT SLOWLY MOVES THROUGH. RRQ OF UPPER JET HAS CAUSED ADDITIONAL SHOWER ACTIVITY TO DEVELOP OVER THE LOWER/MID HUDSON VALLEY HOWEVER...EXPECT THIS TO WEAKEN OVER THE NEXT FEW HOURS AS THE JET LIFT TO THE NE. FORECAST WAS UPDATED TO ADJUST POPS BASED ON LATEST RADAR IMAGERY AND TRENDS THIS EVE WITH A DECREASING TREND OVERNIGHT. MINOR ADJUSTMENTS ALSO MADE TO T/TD/WINDS BASED ON LATEST OBS...TRENDS AND GUIDANCE. GUIDANCE WAS VERY CLOSE WITH LOW TEMPERATURES AND SEE NO REASON TO GO AGAINST IT AT THIS TIME. LOWS IN THE MID 50S ACROSS THE INTERIOR TO LOWER 60S CLOSER TO THE COAST. && .SHORT TERM /6 AM WEDNESDAY MORNING THROUGH THURSDAY/...
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HIGH PRESSURE BUILDS IN ON WEDNESDAY AS MUCH DRIER AIR MOVES FILTERS INTO THE REGION. EXPECTING DEW POINTS TO FALL INTO THE UPPER 40S AND LOWER 50S WITH HIGH TEMPERATURES SLIGHTLY BELOW NORMAL IN THE MIDDLE AND UPPER 70S. MAY SEE SEA BREEZES DEVELOP AT THE COAST IN THE AFTERNOON. TRANQUIL CONDITIONS WILL CONTINUE INTO WEDNESDAY NIGHT AS HIGH PRESSURE MOVES OVERHEAD. GOOD RADIATIONAL COOLING CONDITIONS WILL BE OBSERVED SO FORECASTING LOWS IN THE UPPER 40S AND LOWER 50S ACROSS THE INTERIOR AND MIDDLE 50S ACROSS LONG ISLAND. FOR NEW YORK CITY...LOWS WILL BE IN THE LOWER 60S. THERE IS A MODERATE RISK OF RIP CURRENTS AT ATLANTIC OCEAN BEACHES ON WEDNESDAY.
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&& .LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/... GLOBAL MODELS IN DECENT AGREEMENT WITH THE OVERALL UPPER PATTERN DURING THE LONG TERM SIGNIFYING A MEAN TROUGH GRADUALLY GIVING WAY TO RISING HEIGHTS. AT THE SFC...HIGH PRESSURE OVER THE NE AND MID ATLANTIC ON THU WILL MOVE OFFSHORE AND REMAIN NEARLY STATIONARY OVER THE WESTERN ATLANTIC INTO SAT WITH A RETURN FLOW DEVELOPING. MODELS ARE HINTING AT ISOLD CONVECTION FRI AFTN/EARLY EVE...BUT AM HAVING A HARD TIME FINDING A TRIGGER AND SOUNDINGS ARE INDICATING A MID LEVEL CAP SO HAVE REMOVED SCHC POPS. A WEAKENING COLD FRONT WILL APPROACH FROM THE N ON SAT...ALTHOUGH EC HAS A MORE DEFINED SHORTWAVE ALOFT AND IS THEREFORE MUCH MORE AGGRESSIVE THAN THE GFS. THE FRONT IS FORECAST TO STALL NEAR OR OVER THE LOCAL AREA SAT NIGHT INTO TUE. THE POTENTIAL FOR MCS/MCC`S EXIST IF THE THE OPERATIONAL EC SOLN IS REALIZED AS WE WILL BE ON THE SOUTHERN PERIPHERY OF THE NORTHERN JET. AS FOR TEMPS...A WARMING TREND IS EXPECTED WITH HEIGHTS BUILDING RESULTING IN MORE SUMMER LIKE WEATHER. && .AVIATION /23Z TUESDAY THROUGH SUNDAY/...
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A COLD FRONT JUST NORTH OF LONG ISLAND TO NYC WILL CONTINUE TO SLIDE SOUTH THROUGH THE TERMINALS THIS EVENING. HIGH PRES BUILDS INTO THE REGION BEHIND IT. MOST OF THE CONVECTION HAS ENDED...BUT SCATTERED SHOWERS WILL CONTINUE UNTIL COLD FRONT SLIDES SOUTH OF THE TERMINALS BY 03Z. WINDS WILL VARY FROM NW TO S UNTIL THEN...AS OUTFLOW BOUNDARIES FROM STORMS BRIEFLY SHIFTED WINDS TO THE NORTH...AND THEN WINDS BACKED TO THE S. WILL GENERALLY EXPECT VRB WINDS AROUND 5 KT UNTIL FRONT SLIDES THROUGH...AND THEN WINDS BECOME N/NE AT 8-10 KT. BOTH BUFKIT AND MOS GUIDANCE INDICATING MVFR CONDS DEVELOPING AS WELL THIS EVENING. MVFR TO IFR CONDS DEVELOPING ACROSS THE HUDSON VALLEY AND NEW ENGLAND...AND NE WINDS SHOULD BRING THOSE CLOUDS DOWN INTO THE LOCAL AREA. WILL GO AHEAD AND BRING MVFR CONDS TO THE TERMINALS BETWEEN 02-05Z. CANNOT RULE OUT IFR CONDS AT KHPN/KGON. N/NE WINDS INCREASE TO 10-15 KT BY 10Z...AND OCCASIONAL GUSTS TO TO AROUND 20 KT WILL BE POSSIBLE BEHIND THE FRONT FROM AROUND 10Z TO 15Z. WINDS SHIFT TO THE S LATE IN THE DAY WEDNESDAY. ...NY METRO ENHANCED AVIATION WEATHER SUPPORT... DETAILED INFORMATION...INCLUDING HOURLY TAF WIND COMPONENT FCSTS CAN BE FOUND AT: HTTP://WWW.ERH.NOAA.GOV/ZNY/N90 (LOWER CASE) KJFK FCSTER COMMENTS: MVFR CONDS FM 02-12Z. WIND SHIFT FROM NORTH TO SOUTH POSSIBLE BY 20-22Z WEDNESDAY. KLGA FCSTER COMMENTS: MVFR CONDS FM 02-12Z. WIND SHIFT FROM NORTH TO SOUTH POSSIBLE AFT 22Z WEDNESDAY. KEWR FCSTER COMMENTS: MVFR CONDS FM 02-10Z. WIND SHIFT FROM NORTH TO SOUTH POSSIBLE AFT 22Z WEDNESDAY. KTEB FCSTER COMMENTS: MVFR CONDS FM 02-10Z. KHPN FCSTER COMMENTS: MVFR WITH OCNL IFR CONDS THROUGH 12Z. KISP FCSTER COMMENTS: MVFR WITH OCNL IFR CONDS FM 02-12Z. WIND SHIFT FROM NORTH TO SOUTH POSSIBLE BY 20Z .OUTLOOK FOR 00Z THURSDAY THROUGH SUNDAY... .WEDNESDAY NIGHT-SATURDAY...VFR. .SATURDAY NIGHT-SUNDAY...CHANCE OF RAIN WITH MVFR CONDITIONS.
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&& .MARINE... WINDS WILL STAY AT OR BELOW 10 KT TONIGHT OVER THE WATERS. HIGH PRESSURE BUILDS IN BEHIND A DEPARTING COLD FRONT ON WEDNESDAY...SO MAY SEE WINDS ON THE OCEAN GUST UP TO 20 KT THROUGH THE AFTERNOON. WINDS SHOULD SUBSIDE WEDNESDAY EVENING THROUGH THURSDAY MORNING. SEAS WILL REMAIN UNDER SCA CRITERIA. WINDS AND SEAS ARE THEN EXPECTED TO REMAIN BLO SCA LEVELS THROUGH THE REMAINDER OF THE FORECAST PERIOD. && .HYDROLOGY... THERE IS THE POTENTIAL FOR UP TO AN ADDITIONAL 1/4 INCH OF RAINFALL TONIGHT...HIGHEST OVER EASTERN CT AND LONG ISLAND. BRIEF HEAVY DOWNPOURS WILL BE POSSIBLE THIS EVENING PRODUCING LOCALLY HIGHER AMOUNTS. THE THREAT FOR MINOR FLOODING HAS DIMINISHED AND THERE SHOULD NOT BE ANY ADDITIONAL ISSUES TONIGHT. FOR DETAILS ON SPECIFIC AREA RIVERS AND LAKES...INCLUDING OBSERVED AND FORECAST RIVER STAGES AND LAKE ELEVATIONS...PLEASE VISIT THE ADVANCED HYDROLOGIC PREDICTION SERVICE /AHPS/ GRAPHS ON OUR WEBSITE. && .OKX WATCHES/WARNINGS/ADVISORIES... CT...NONE. NY...NONE. NJ...NONE. MARINE...NONE. && $$ SYNOPSIS...24/DS NEAR TERM...DS SHORT TERM...DS LONG TERM...24 AVIATION...MET MARINE...24/DS/NV HYDROLOGY...24/DS

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