Area Forecast Discussion
Issued by NWS Upton, NY

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
-- Highlight Changed Discussion --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KOKX 302320 AFDOKX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW YORK NY 720 PM EDT TUE JUN 30 2015 .SYNOPSIS... A WARM FRONT JUST TO THE SOUTH WILL LINGER NEARBY INTO WEDNESDAY MORNING...THE LIFT TO THE NORTHEAST BY WEDNESDAY AFTERNOON. A COLD FRONT WILL MOVE ACROSS WEDNESDAY NIGHT. CANADIAN HIGH PRESSURE WILL BUILD ACROSS THE AREA FROM THURSDAY INTO FRIDAY. WAVES OF LOW PRESSURE WILL TRAVERSE A STATIONARY FRONT TO THE SOUTH THROUGH THE WEEKEND. A WARM FRONT WILL LIFT THROUGH ON MONDAY...WITH A COLD FRONT APPROACHING MONDAY NIGHT INTO TUESDAY. && .NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/...
-- Changed Discussion --
WITH A WIDESPREAD STABLE AIRMASS OVER THE LOCAL AREA...HAVING A HARD TIME GETTING SHOWERS TO MAKE IT INTO WESTERN ZONES...MUCH LESS THUNDERSTORMS...AND EVEN MUCH LESS SEVERE THUNDERSTORMS. BASED ON LATEST OBSERVATIONS...THERE IS NO CAPE OVER CT/LI...AND ONLY MARGINAL ML MUCAPE OF 300-400 J/KG OVER WESTERN PORTIONS OF NE NJ AND WESTERN PORTIONS OF THE LOWER HUDSON VALLEY. SHOWERS/TSTMS MOVING INTO NORTHERN AND WESTERN ORANGE COUNTY...BUT NOT MUCH IN THE WAY OF CONVECTIVE ACTIVITY. WILL HAVE TO MONITOR FOR FLOODING POTENTIAL THERE DUE TO TRAINING OF CELLS. WILL THEREFORE CANCEL SEVERE THUNDERSTORM WATCH 372. CANNOT RULE OUT A WARNING FOR WESTERN ORANGE COUNTY GOING INTO THIS EVENING...BUT NOT EXPECTING WIDESPREAD SEVERE THUNDERSTORMS. APPROACHING SHORTWAVE...IN TANDEM WITH THE LINGERING WARM FRONT...SHOULD HELP REGENERATE SHOWERS AND TSTMS LATE...WITH LIKELY POP FOR ALL OF NYC METRO AND CHANCE ELSEWHERE. LOWS WILL BE NEAR 70 IN NYC...AND IN THE 60S ELSEWHERE. THERE IS A MODERATE RISK FOR RIP CURRENTS AT OCEAN BEACHES THROUGH THIS EVENING.
-- End Changed Discussion --
&& .SHORT TERM /6 AM WEDNESDAY MORNING THROUGH WEDNESDAY NIGHT/... EXPECT LIKELY TO CAT POP FOR SHOWERS AND SCT TSTMS WED MORNING AS THE WARM FRONT AND ASSOCIATED UPPER LEVEL FORCING MOVE ACROSS. CANNOT RULE OUT LOCALLY HEAVY RAIN AND GUSTY WINDS WITH THE STRONGEST OF THIS ACTIVITY. IN THE WAKE OF THE WARM FRONT...BEST MOISTURE AXIS APPEARS TO SLIDE EAST OF THE REGION. SO UNCERTAINTY FOR AFTERNOON CONVECTION IN TERMS OF AMOUNT DESTABILIZATION BEFORE AFTERNOON SHORTWAVE PASSAGE. SCATTERED AFTERNOON SHOWERS/TSTMS ARE POSSIBLE AHEAD OF THE COLD FRONT WELL INLAND...WITH ISOLD ACTIVITY ELSEWHERE. STILL A MARGINAL CONDITIONAL THREAT FOR A FEW STRONG TO SEVERE STORMS IN THE EARLY TO MID AFTERNOON. SETUP DOES NOT LOOK FAVORABLE FOR WIDESPREAD CONVECTION LATE IN THE AFTERNOON INTO EVENING AS SHORTWAVE LOOKS TO BE PIVOTING EAST OF THE REGION. COVERAGE MAY BE MORE ISOLATED ALONG THE LAGGING COLD FRONT AS IT PASSES THROUGH...WITH A DIMINISHED SEVERE THREAT DUE TO SUBSIDENCE AND A DRYING AIR MASS. HIGHS ON WED WILL BE FROM THE UPPER 70S ALONG THE COAST...TO LOWER 80S MOST ELSEWHERE...TO MID/UPPER 80S IN NYC AND NE NJ. LOWS WED NIGHT WILL BE SLIGHTLY COOLER THAN THOSE OF TONIGHT...AT LEAST OUTSIDE OF NYC...WITH SOME UPPER 50S POSSIBLE WELL INLAND. THERE IS A MODERATE RISK FOR RIP CURRENTS AT OCEAN BEACHES ON WEDNESDAY. && .LONG TERM /THURSDAY THROUGH TUESDAY/... A FRONTAL SYSTEM SETTLES SOUTH OF THE AREA ON THURSDAY...AS HIGH PRESSURE BUILDS ACROSS THE AREA THROUGH THE END OF THE WEEK. ON SATURDAY...LATEST MODELS HAVE TRENDED FARTHER SOUTH WITH PRECIPITATION...THERE IS STILL SOME CHANCE OF MOISTURE TRIGGERING SOME SCATTERED SHOWERS/THUNDERSTORMS...BUT WILL LOWER POPS FOR MOST OF THE AREA SATURDAY AFTERNOON AND EVENING. TEMPERATURES ON SATURDAY SHOULD BE IN THE UPPER 70S TO LOWER 80S. DRY WEATHER IS THEN EXPECTED ON SUNDAY...WITH CHANCE FOR THUNDERSTORMS IN FOR MONDAY NIGHT AS A WARM FRONT IS PREDICTED TO LIFT THROUGH THE AREA. A COLD FRONT IS THEN EXPECTED TO APPROACH THE AREA MONDAY NIGHT INTO TUESDAY. TEMPS ARE EXPECTED TO BE NEAR SEASONABLE LEVELS THROUGH THE EXTENDED PERIOD. && .AVIATION /23Z TUESDAY THROUGH SUNDAY/...
-- Changed Discussion --
A WARM FRONT WILL APPROACH FROM THE SOUTH TONIGHT AND LIFT NORTHEAST OF THE TERMINALS WEDNESDAY MORNING. A COLD FRONT APPROACHES LATE WEDNESDAY. VFR THIS EVENING. STRATUS IS EXPECTED TO DEVELOP AFTER MIDNIGHT TONIGHT. HIGHER CONFIDENCE IN LOW END MVFR...BUT IFR CONDITIONS ARE ALSO POSSIBLE...ESPECIALLY BETWEEN 8-12Z. SHOWERS ARE POSSIBLE AS WELL 8-12Z...BUT MOST LIKELY 12-15Z. ISO THUNDER CANNOT BE RULED OUT. IMPROVEMENT TO VFR IS EXPECTED WEDNESDAY MORNING AFTER 14-15Z. ISO SHOWER OR STORM POSSIBLE...ESPECIALLY NORTH AND WEST OF CITY TERMINALS LATE WEDNESDAY AFTERNOON. S-SE WINDS WILL CONTINUE TO DIMINISH THIS EVENING. WINDS BACK TO THE E/SE OVERNIGHT BEFORE VEERING AGAIN WEDNESDAY MORNING TO THE SW. GUSTS 20-25 KT EXPECTED ACROSS CITY TERMINALS IN THE AFTERNOON. ...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: SHRA POSSIBLE POSSIBLE 2-4Z. IFR CIGS POSSIBLE 8-12Z. START TIME OF WIND GUSTS WED AFTERNOON MAY BE OFF BY AN HOUR OR TWO. KLGA FCSTER COMMENTS: SHRA POSSIBLE POSSIBLE 2-4Z. IFR CIGS POSSIBLE 8-12Z. START TIME OF WIND GUSTS WED AFTERNOON MAY BE OFF BY AN HOUR OR TWO. KEWR FCSTER COMMENTS: IFR CIGS POSSIBLE 8-12Z. START TIME OF WIND GUSTS WED AFTERNOON MAY BE OFF BY AN HOUR OR TWO. KTEB FCSTER COMMENTS: IFR CIGS POSSIBLE 8-12Z. START TIME OF WIND GUSTS WED AFTERNOON MAY BE OFF BY AN HOUR OR TWO. KHPN FCSTER COMMENTS: IFR CIGS POSSIBLE 8-12Z. START TIME OF WIND GUSTS WED AFTERNOON MAY BE OFF BY AN HOUR OR TWO. KISP FCSTER COMMENTS: IFR CIGS POSSIBLE 8-12Z. START TIME OF WIND GUSTS WED AFTERNOON MAY BE OFF BY AN HOUR OR TWO. .OUTLOOK FOR 00Z THURSDAY THROUGH SATURDAY... .WEDNESDAY NIGHT-FRIDAY...GENERALLY VFR EXPECTED. .SATURDAY...MAINLY VFR...ISOLATED SHRA/TSRA CANNOT BE RULED OUT.
-- End Changed Discussion --
&& .MARINE... NEAR SHORE WINDS IN THE NY BIGHT AND HARBOR CONTINUE TO GUST INTO THE LOWER 20S. OCEAN SEAS WILL GRADUALLY BUILD ON WED AHEAD OF A COLD FRONT. POTENTIAL FOR MARGINAL SCA SEAS BY WED EVE. OTHERWISE QUIET WINDS/SEAS EXPECTED OUTSIDE OF ANY TSTMS. && .HYDROLOGY... POTENTIAL FOR SCATTERED THUNDERSTORMS TO PRODUCE LOCALLY HEAVY RAINFALL IN NE NJ EARLY THIS EVENING...AND THROUGHOUT FROM LATE TONIGHT INTO WED MORNING. BASIN AVG OF RAIN IS AROUND A HALF INCH...BUT LOCALLY 1 INCH OR MORE IS POSSIBLE. MOST LIKELY THREAT WILL BE FOR MINOR URBAN FLOODING...BUT THERE IS A LOW THREAT OF FLASH FLOODING WITH ANY TRAINING CONVECTION. && .TIDES/COASTAL FLOODING... WITH APPROACHING FULL MOON...TIDAL DEPARTURES OF ONLY 3/4 TO 1 1/2 FT ARE NEEDED FOR MINOR COASTAL FLOODING BENCHMARKS TO BE REACHED DURING THE LATE EVENING/NIGHT HIGH TIDES THE NEXT FEW DAYS. MINOR BENCHMARKS COULD BE TOUCHED ACROSS THE MOST VULNERABLE AREAS...PARTICULARLY ALONG THE SOUTH SHORE BAYS OF NASSAU COUNTY AND WESTERN LI SOUND...MID TO LATE WEEK. && .OKX WATCHES/WARNINGS/ADVISORIES... CT...NONE. NY...NONE. NJ...NONE. MARINE...NONE. && $$ SYNOPSIS...FIG NEAR TERM...GOODMAN/MPS SHORT TERM...GOODMAN LONG TERM...FIG AVIATION...DS MARINE...FIG/GOODMAN HYDROLOGY...FIG/GOODMAN TIDES/COASTAL FLOODING...

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.