Area Forecast Discussion
Issued by NWS Boston, MA

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000 FXUS61 KBOX 241535 AFDBOX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAUNTON MA 1035 AM EST MON NOV 24 2014 .SYNOPSIS...
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A WARM FRONT WILL BRING A BRIEF PERIOD OF HEAVY RAIN AND STRONG WINDS ALONG THE SOUTHEAST COAST LATE THIS MORNING...FOLLOWED BY UNSEASONABLY MILD CONDITIONS MONDAY AFTERNOON. QUIET AND MILD TUESDAY WITH SOME GUSTY SW WINDS. STORM SYSTEM ANTICIPATED WEDNESDAY INTO THURSDAY MORNING...YET TRACK AND EFFECTS REMAIN UNCERTAIN. GRADUALLY TURNING COLDER INTO THE WEEKEND.
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&& .NEAR TERM /UNTIL 6 PM THIS EVENING/...
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1030 AM UPDATE... OVERALL TREND IN THE FORECAST REMAINS ON TRACK FOR THIS MORNING. WARM FRONT HAS LIFTED WELL TO THE NORTH OF THE REGION ALLOWING FOR WARM AIR TO MOVE IN AND TEMPS INTO THE UPPER 50S AND 60S. ALTHOUGH BULK OF THE RAIN FROM EARLY THIS MORNING HAS MOVED NORTH AND EAST OF THE REGION...STILL WILL SEE SCT SHOWERS THROUGHOUT THE DAY. GOOD AMOUNT OF MOISTURE TRANSFER MOVING INTO THE AREA TO ALLOW FOR THESE SHOWERS TO CONTINUE TO REGENERATE. ANTICIPATE LOW VSBYS AND CLOUDS TO CONTINUE THROUGH MUCH OF THE DAY THANKS TO A GOOD AMOUNT OF LOW LEVEL MOISTURE PER CROSS SECTIONS. DRY SLOT HAS MOVED INTO SOUTHERN NEW ENGLAND LATE THIS MORNING ALLOWING FOR THE POTENTIAL FOR MIXING THROUGHOUT THE AFTERNOON. ALTHOUGH MAIN BULK OF THE LLJ HAS MOVED OFFSHORE...WILL STILL SEE THE POTENTIAL FOR GUSTS UP TO 15-25 MPH ACROSS THE INTERIOR...HIGHER ACROSS THE CAPE AND ISLANDS. PREVIOUS DISCUSSION... THIS AFTERNOON... DRY SLOT WILL HAVE MOVED ACROSS THE REGION BY MIDDAY WITH RAINFALL EXITING THE REGION...BUT PLENTY OF LOW LEVEL MOISTURE IN PLACE WHICH WILL KEEP LOW CLOUDS ACROSS THE REGION WITH A FEW PASSING SHOWERS POSSIBLE. IT WILL BE WINDY AS STRONG LOW LEVEL WINDS REMAIN ACROSS THE REGION. SW WIND GUSTS 25-35 MPH EXPECTED AND POSSIBLY UP TO 40 MPH SE NEW ENG. 925 MB TEMPS 13-15C SO IT WILL BE A RATHER MILD DAY FOR LATE NOVEMBER WITH TEMPS REACHING THE MID 60S ACROSS MANY LOCATIONS. 70 DEGREES WOULD BE POSSIBLE IF WE COULD GET SOME SUNSHINE BUT THIS DOESNT APPEAR LIKELY.
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&& .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM TUESDAY/... WEAK COLD FRONT WILL BE MOVING INTO THE REGION SO CANT RULE OUT A FEW SHOWERS. OTHERWISE AREAS OF LOW CLOUDS WILL LINGER INTO THE EVENING BEFORE PARTIAL MOVES IN FROM THE WEST OVERNIGHT. IT WILL BE AN UNSEASONABLY MILD MIGHT AS LOW LEVEL COOLING DOESNT MOVE INTO THE REGION TIL LATE TONIGHT. MINS WILL BE IN THE 50S ACROSS MUCH OF THE REGION...EXCEPT 40S FAR W WHERE COOLING ARRIVES EARLIER. GUSTY SW WINDS WILL CONTINUE INTO THE EVENING BEFORE DIMINISHING OVERNIGHT. && .LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/... * PLOWABLE SNOW STORM LIKELY WEDNESDAY...EXACT TRACK AND LOCATION OF RAIN/SNOW LINE STILL QUITE UNCERTAIN * COLDER TEMPERATURES EXPECTED TOWARDS THE WEEKEND * LOW CONFIDENCE IN ANOTHER STORM LATE IN THE WEEKEND MAIN CONCERN THROUGH THE LONG TERM IS THE POTENTIAL FOR A WINTER STORM WEDNESDAY INTO THANKSGIVING. UNFORTUNATELY...MODELS ARE STRUGGLING WITH THIS STORM...PARTICULARLY THE TRACK OF THE LOW WHICH WILL AFFECT EVERYTHING FROM AMOUNT AND TYPE OF PRECIPITATION TO TEMPERATURE GRADIENTS...WHICH WILL IN TURN AFFECT THE TYPE OF PRECIPITATION. THE ENSEMBLES HAVE THE LOW TRACKING ANYWHERE FROM OVER PENNSYLVANIA TO OUT TO SEA WITH THE OPERATIONAL MODELS SOMEWHERE IN BETWEEN. THE MOST LIKELY SOLUTIONS APPEAR TO BE TRACKING OVER SOUTHERN NEW ENGLAND /AT THE WESTERN END OF THE ENVELOPE/ TO JUST OUTSIDE THE 40/70 BENCHMARK /AT THE EASTERN END OF THE ENVELOPE. OUTSIDE OF THIS TIME FRAME THE MODELS ARE IN AGREEMENT THROUGH THE WORK WEEK WITH MORE DISCREPANCIES SEEN WITH THE WEEKEND FORECAST. THE GFS IS FORECASTING ANOTHER ROUND OF PRECIP WITH A COLD FRONT APPROACHING SOUTHERN NEW ENGLAND. THIS IS VERY LOW CONFIDENCE AT THIS POINT THOUGH. TUESDAY...ANOTHER RELATIVELY WARM DAY EXPECTED THOUGH IT WILL BE A FEW DEGREES COOLER THAN MONDAY. TEMPERATURES WILL BE RIGHT AROUND TO A LITTLE ABOVE NORMAL. LOW PRESSURE IN QUEBEC WILL MOVE INTO THE MARITIMES PULLING A COLD FRONT THROUGH SOUTHERN NEW ENGLAND. A SOUTHWESTERLY 40 TO 50 KT LOW LEVEL JET WITH DECENT MIXING WILL ALLOW FOR SOME GUSTY WINDS BUT THESE ARE EXPECTED TO REMAIN BELOW ADVISORY LEVELS. WEDNESDAY THROUGH THANKSGIVING MORNING...AS STATED ABOVE...THIS WILL BE THE FOCUS OF THE FORECAST AND IS ALSO THE MOST UNCERTAIN. LOW PRESSURE WILL MOVE UP THE COAST MOST LIKELY MOVING ANYWHERE FROM DIRECTLY OVER SOUTHERN NEW ENGLAND TO JUST OUTSIDE THE 40/70 BENCHMARK. A TRACK OF THIS SORT IS LIKELY TO BRING A PLOWABLE SNOW TO AT LEAST A PORTION OF SOUTHERN NEW ENGLAND. WHILE THERE IS STILL QUITE A BIT OF UNCERTAINTY WITH THE TRACK...AM CONFIDENT ENOUGH IN SIX INCHES OF SNOW FALLING ACROSS WESTERN MASSACHUSETTS AND NORTHERN CONNECTICUT TO ISSUE A WINTER STORM WATCH FOR THESE AREAS. ESPECIALLY SINCE THIS IS THE BUSIEST TRAVEL DAY OF THE YEAR AND LIKELY TO AFFECT MANY. THE ECMWF IS THE FARTHEST WEST OF THE OPERATIONAL MODELS AND BRINGS AT LEAST THREE-QUARTERS OF AN INCH OF QPF OVER THE WESTERN AREAS. WHILE THE GFS IS FARTHER TO THE EAST...IT TOO BRINGS AT LEAST THREE QUARTERS OF AN INCH OF QPF OVER THE WESTERN AREAS AND HAS A COLDER THERMAL PROFILE. THIS WOULD RESULT IN AT LEAST SIX INCHES OF SNOW AT LEAST OVER THE WESTERN AREAS AND LIKELY FARTHER EAST. THIS IS DEFINITELY A STORM TO WATCH. WHILE THE LOCATION OF THE RAIN/SNOW LINE CANNOT BE DETERMINED AT THIS POINT...APPEARS LIKELY THAT IT WILL BE SOMEWHERE NEAR OR WEST OF THE INTERSTATE 95 CORRIDOR. A FEW SNOW SHOWERS MAY LINGER INTO THANKSGIVING MORNING BEFORE THE LOW PRESSURE PULLS AWAY FROM SOUTHERN NEW ENGLAND. THANKSGIVING AFTERNOON THROUGH FRIDAY...HIGH PRESSURE BUILDS INTO SOUTHERN NEW ENGLAND RESULTING IN COOLER TEMPERATURES BUT QUIET WEATHER. SATURDAY AND SUNDAY...LESS CERTAINTY IN THIS PART OF THE FORECAST. HIGH PRESSURE SATURDAY WILL MOVE OFFSHORE ALLOWING A LOW PRESSURE SYSTEM TO AFFECT A PORTION OF SOUTHERN NEW ENGLAND SUNDAY. && .AVIATION /15Z MONDAY THROUGH FRIDAY/...
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FORECASTER CONFIDENCE LEVELS... LOW...LESS THAN 30 PERCENT. MODERATE...30 TO 60 PERCENT. HIGH...GREATER THAN 60 PERCENT. .SHORT-TERM /THROUGH TONIGHT/...MODERATE CONFIDENCE. TODAY...MVFR/IFR IN MODERATE TO HEAVY RAIN. STEADY RAIN EXITS 13-16Z WITH NUMBEROUS SHOWERS POSSIBLE IN THE AFTERNOON...KEEPING MVFR/IFR CIGS LINGERING. S WIND GUSTS TO 35-40 KT POSSIBLE ACROSS SE NEW ENG AND ESPECIALLY CAPE/ISLANDS 15-19Z...THEN SW GUSTS TO 25-35 KT DURING THE AFTERNOON. LLWS LIKELY AS 2K FT WINDS 45-55 KT. TONIGHT...MVFR-IFR CONDITIONS GRADUALLY IMPROVE TO VFR IN THE EVENING ACROSS W AND N TERMINALS...BUT NOT UNTIL AFT 06Z ACROSS SE NEW ENG. BLUSTERY SW WIND GUSTS 25-35 KT IN THE EVENING DIMINISHING OVERNIGHT. KBOS TERMINAL...MODERATE CONFIDENCE. A PERIOD OF IFR CIGS POSSIBLE BUT NOT IN TAF AS CONFIDENCE IS LOW WITH GUSTY S WINDS. LLWS LIKELY TODAY WITH 50 KT AT 2K FT. KBDL TERMINAL...MODERATE CONFIDENCE. LLWS LIKELY. OUTLOOK...TUESDAY THROUGH FRIDAY. TUESDAY...HIGH CONFIDENCE. VFR. SW WINDS GUST TO 25KTS. WEDNESDAY INTO THU AM...LOW CONFIDENCE. MVFR/IFR CONDITIONS IN SNOW/RAIN. GREATEST LIKELIHOOD OF SNOW...INCLUDING HEAVY SNOW...IS WEST OF WORCESTER THROUGH WESTERN MASSACHUSETTS AND NORTHERN CONNECTICUT. THU PM THROUGH FRI...MODERATE CONFIDENCE. VFR.
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&& .MARINE... FORECASTER CONFIDENCE LEVELS... LOW...LESS THAN 30 PERCENT. MODERATE...30 TO 60 PERCENT. HIGH...GREATER THAN 60 PERCENT. .SHORT TERM /THROUGH TONIGHT/...MODERATE CONFIDENCE. STRONG LOW LEVEL JET WILL BRING SOUTHERLY GALE FORCE WIND GUSTS TO THE WATERS TODAY. WHILE INVERSION IS PRESENT WHICH WILL LIMIT STRONGEST WINDS FROM MIXING DOWN STILL THINK GUSTS TO 35-40 KT POSSIBLE SO GALE WARNINGS WILL CONTINUE. SW GALES WILL LINGER INTO THE EVENING ACROSS THE OUTER WATERS BEFORE DIMINISHING OVERNIGHT. SEAS WILL BUILD TO BETWEEN 10 AND 15 FEET ACROSS THE SOUTHERN WATERS. REDUCED VSBYS THIS MORNING IN RAIN AND FOG. OUTLOOK...TUESDAY THROUGH FRIDAY. TUESDAY...SOUTHWEST SCA WINDS SHIFT TO THE NORTHWEST AS A COLD FRONT CROSSES THE WATERS...THEN WINDS AND SEAS DIMINISH AS HIGH PRESSURE BUILDS OVER THE WATERS. WEDNESDAY...SEAS INCREASE AS LOW PRESSURE MOVES OVER OR NEAR THE COASTAL WATERS. NORTHWESTERLY GALES LIKELY. THURSDAY AND FRIDAY...SEAS DIMINISH AS HIGH PRESSURE BUILDS OVER THE WATERS. WESTERLY WINDS GUST TO 25 KTS. && .TIDES/COASTAL FLOODING... ASTRONOMICAL TIDES ARE FAIRLY HIGH DURING THIS MORNINGS HIGH TIDE CYCLE. WITH SOUTHERLY GALES EXPECTED...A STORM SURGE OF 1.5 TO 2 FT IS LIKELY ALONG THE SOUTH COAST WITH HIGHEST SURGE EXPECTED IN NARRAGANSETT BAY. THIS MAY BRING A FEW LOCATIONS TO MINOR FLOOD. THE MAIN THREAT FOR MINOR COASTAL FLOODING WILL BE ALONG NARRAGANSETT BAY AND WESTPORT HARBOR DUE TO SOUTHERLY FETCH. COASTAL FLOOD ADVISORIES CONTINUE FOR THE SOUTH COAST. NO FLOODING IS EXPECTED ALONG THE EAST COAST. && .BOX WATCHES/WARNINGS/ADVISORIES... CT...WINTER STORM WATCH FROM WEDNESDAY MORNING THROUGH THURSDAY MORNING FOR CTZ002>004. MA...WIND ADVISORY UNTIL 2 PM EST THIS AFTERNOON FOR MAZ018>024. COASTAL FLOOD ADVISORY UNTIL 11 AM EST THIS MORNING FOR MAZ020>022. WINTER STORM WATCH FROM WEDNESDAY MORNING THROUGH THURSDAY MORNING FOR MAZ002>004-008>012-026. NH...NONE. RI...WIND ADVISORY UNTIL 2 PM EST THIS AFTERNOON FOR RIZ003>008. COASTAL FLOOD ADVISORY UNTIL 11 AM EST THIS MORNING FOR RIZ002- 004>007. MARINE...GALE WARNING UNTIL 10 PM EST THIS EVENING FOR ANZ231>235-237- 250-254>256. SMALL CRAFT ADVISORY UNTIL 1 AM EST TUESDAY FOR ANZ230. GALE WARNING UNTIL 4 PM EST THIS AFTERNOON FOR ANZ236. GALE WARNING UNTIL 6 PM EST THIS EVENING FOR ANZ251. && $$ SYNOPSIS...KJC/RLG NEAR TERM...KJC/DUNTEN SHORT TERM...KJC LONG TERM...RLG AVIATION...KJC/RLG MARINE...KJC/RLG TIDES/COASTAL FLOODING...

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