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FXUS61 KGYX 241408 AFDGYX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAY ME
1008 AM EDT FRI MAR 24 2023

SYNOPSIS  MUCH DRIER MOVES INTO THE AREA TODAY UNDER GUSTY NORTHWESTERLY WINDS HIGH PRESSURE REMAINS IN CONTROL THROUGH SATURDAY AFTERNOON BEFORE LOW PRESSURE MOVING INTO THE GREAT LAKES REDEVELOPS OVER THE GULF OF MAINE SATURDAY NIGHT THIS SYSTEM WILL BRING SNOW CHANGING TO RAIN ACROSS SOUTHERN NEW HAMPSHIRE AND THE COAST OF MAINE WITH MORE SNOW ACROSS THE FOOTHILLS AND MOUNTAINS BEFORE A POTENTIAL CHANGEOVER PRECIPITATION TAPERS OFF ON SUNDAY WITH NORTHWEST WINDS AND MILDER TEMPERATURES FOR MONDAY OF NEXT WEEK

&&


NEAR TERM /UNTIL 6 PM THIS EVENING/ 1005 AM UPDATELITTLE CHANGE TO THE GOING FORECAST AT THIS TIME JUST A MINOR ADJUSTMENT TO TEMPERATURES BASED ON LATEST OBSERVATIONAL TRENDS

640 AM UPDATENO SIGNIFICANT CHANGES TO THE GOING FORECAST WITH ONLY MINOR TWEAKS TO T/TDS AND SKY COVER TO BETTER ALIGN WITH OBSERVED TRENDS

PREVIOUSLY

A COLD FRONT IS CURRENTLY PUSHING OFFSHORE WITH LATEST SURFACE OBS SUGGESTING LINGERING LOW LEVEL MOISTURE ALONG THE COASTAL PLAIN IS MIXING OUT THIS WILL ALLOW FOR ANY AREAS OF PATCHY FOG TO DISSIPATE THROUGH DAY BREAK LINGERING UPSLOPE SNOW SHOWERS IN THE MOUNTAINS WILL ALSO DISSIPATE OVER THE NEXT FEW HOURS

HIGH PRESSURE BUILDS IN FROM THE NW TODAY BEFORE CRESTING OVER THE AREA TONIGHT THIS WILL BRING MOSTLY DRY WEATHER TODAY WITH SKIES TURNING PARTLY TO MOSTLY SUNNY DOWNSTREAM OF THE MOUNTAINS CLOUDS LINGER LONGER UPSTREAM OF THE MOUNTAINS INTO THIS AFTERNOON BEFORE THINNING LATER THIS EVENING NW WINDS WILL BE BREEZY INTO EARLY THIS AFTERNOON WITH STRONG WINDS IN THE MOUNTAINS THROUGH THIS MORNING BEFORE WINDS RELAX LATER THIS AFTERNOON AND EVENING AS THE GRADIENT OVER THE AREA SLACKENS

&&


SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SATURDAY/ HIGH PRESSURE CRESTING OVER THE AREA TONIGHT WILL PROMOTE RADIATIONAL COOLING THIS WILL ALLOW LOWS TO DROP INTO THE TEENS ACROSS THE NORTH AND FAVORABLE RADIATIONAL COOLING SPOTS SOUTH OF THE MOUNTAINS ELSEWHERE, LOWS WILL MAINLY BE IN THE 20S

HIGH PRESSURE OVER NORTHERN MAINE SATURDAY MORNING WILL RETREAT TOWARDS THE CANADIAN MARITIMES IN RESPONSE TO AN UPPER TROUGH LIFTING THROUGH THE GREAT LAKES REGION THIS UPPER TROUGH WILL LEAD TO A SURFACE LOW TRACKING INTO THE EASTERN GREAT LAKES SATURDAY AFTERNOON AND EVENING OVERRUNNING PRECIPITATION WILL OVERSPREAD THE AREA FROM SW TO NE LATE SATURDAY MORNING INTO THE AFTERNOON AND WILL PICK UP IN INTENSITY DURING THE AFTERNOON AND EVENING AS FGEN FORCING AROUND 700 MB INCREASES AFTER A COOL START, TEMPERATURES WILL RISE INTO THE LOW TO MID 30S BEFORE PRECIPITATION ONSET THANKS TO SOME WET BULBING, PRECIPITATION WILL START AS LIGHT SNOW IN MOST SPOTS SHORTLY AFTER PRECIPITATION ONSET, BUFKIT SOUNDINGS SHOW A MODEST WARM NOSE AROUND 5KFT TO 7KFT PUSHING IN FROM THE SW THAT WILL LEAD TO SNOW MIXING WITH AND CHANGING TO SLEET ACROSS MUCH OF THE SOUTHERN TWO THIRDS OF NH INTO SW MAINE BY THE END OF THE SHORT TERM PERIOD SATURDAY EVENING SURFACE TEMPERATURES WILL NOT STRAY TOO FAR FROM THE LOW TO MID 30S SATURDAY AFTERNOON AND THUS WITH THESE MARGINAL TEMPERATURES IT IS ANTICIPATED THAT SNOW WILL STRUGGLE TO ACCUMULATE, ESPECIALLY A LOW ELEVATIONS SNOW ACCUMULATIONS THROUGH SATURDAY EVENING LOOK TO BE AROUND 2 INCHES OR LESS MORE DETAILS REGARDING THE REST OF THIS SYSTEM IN THE LONG TERM SECTION BELOW

&&


LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/ LOW PRESSURE WILL ENTER SOUTHERN CANADA FROM THE GREAT LAKES REGION SATURDAY NIGHT MEANWHILE, 00Z GUIDANCE REMAINS IN FAIRLY GOOD AGREEMENT ALLOWING A SECONDARY AREA OF LOW PRESSURE TO CROSS THROUGH THE GULF OF MAINE DURING THIS PERIOD WITH THIS PATTERN, THE H7 AND H8 LOW TRACK WEST OF NEW ENGLAND ALLOWING WARM AIR TO ENTER THE REGION FROM ALOFT ANY SNOW WILL QUICKLY CHANGE TO RAIN ALONG THE COAST AND OVER SOUTHERNMOST NEW HAMPSHIRE WHERE ACCUMULATIONS WILL GENERALLY BE AROUND AN INCH OR LESS HAVE LEANED TOWARDS THE COOL SIDE OF GUIDANCE FOR THE OVERNIGHT MINS SATURDAY NIGHT, HOWEVER, WE HAVE KEPT A NON- DIURNAL TREND IN THE FORECAST AS TEMPERATURES SHOULD CLIMB LATER IN THE NIGHT

THE LOW EXITS THE REGION ON SUNDAY WITH SLIGHTLY DRIER AIR ENTERING THE REGION ON GUSTY WESTERLY WINDS SOME SCATTERED SNOW SHOWERS WILL CONTINUE MAINLY IN THE MOUNTAINS, AIDED BY AN UPSLOPE COMPONENT TO THE FLOW THESE SNOW SHOWERS WILL CONTINUE INTO SUNDAY EVENING IN THE NORTH TEMPERATURES WILL END UP DURING THE AFTERNOON HOURS CLIMBING INTO THE LOWER 50S OVER SOUTHERN AREAS

A WEAK RIDGE OF HIGH PRESSURE WILL KEEP MAINLY DRY CONDITIONS ACROSS THE REGION ON MONDAY AND INTO EARLY TUESDAY BY TUESDAY AFTERNOON, A WEAK AND FAST MOVING TROUGH WILL ENTER THE REGION ALLOWING FOR MORE SCATTERED SNOW SHOWERS

ON WEDNESDAY, LOW PRESSURE WILL DEVELOP WELL OFF THE EASTERN SEABOARD BEFORE MOVING OUT TO SEA HOWEVER, THERE IS SOME POTENTIAL FOR A SURFACE TROUGH TO EXTEND WELL TO THE NORTHWEST OF THIS SYSTEM THIS COULD POTENTIALLY BRING SOME SNOW SHOWERS TO THE REGION, PARTICULARLY THE COASTLINE HOWEVER, OPERATIONAL MODELS AND ENSEMBLE SOLUTIONS VARY SIGNIFICANTLY WITH THIS FEATURE

&&


AVIATION /14Z FRIDAY THROUGH TUESDAY/ SHORT TERMDRIER AIR ARRIVING ON NW FLOW FOLLOWED BY HIGH PRESSURE WILL ALLOW FOR PREVAILING VFR INTO SATURDAY MORNING UPSLOPE CLOUDS WILL LEAD TO MVFR CIGS LINGERING AT KHIE THROUGH THIS MORNING BEFORE SCATTERING TO VFR LATE THIS MORNING LOW PRESSURE APPROACHING FROM THE GREAT LAKES SATURDAY WILL OVERSPREAD LIGHT SNOW AND THEN SLEET FROM SW TO NE SATURDAY AFTERNOON WITH CONDITIONS DETERIORATING TO IFR/LIFR BY SATURDAY EVENING

LONG TERMIFR WITH AREAS OF LIFR CONDITIONS CAN BE EXPECTED SATURDAY NIGHT IN MIXED PRECIPITATION TRENDING TOWARDS RAIN CONDITIONS THEN IMPROVE TO MVFR AND VFR DURING THE DAY SUNDAY THERE WILL BE GUSTY WESTERLY WINDS TO END OUT THE WEEKEND GENERALLY VFR CONDITIONS WILL BE IN PLACE TO START OUT NEXT WEEK MOSTLY SNOW AND SLEET WILL FALL OVER THE NORTHERN MOUNTAINS WITH A TRANSITION ZONE LYING OVER CENTRAL AREAS

&&


MARINE SHORT TERMWINDS DROPPED BELOW SCA THRESHOLDS LATE THIS MORNING LOW PRESSURE APPROACHING FROM THE GREAT LAKES WILL BRING INCREASING EASTERLY FLOW WITH WINDS APPROACHING SCA THRESHOLDS LATE SATURDAY AFTERNOON

LONG TERMSCA CONDITIONS WILL BE POSSIBLE SATURDAY EVENING AS LOW PRESSURE CROSSES INLAND AND A COASTAL LOW DEVELOPS IN THE GULF OF MAINE COULD SEE SOME GALE CONDITIONS ON THE OUTER WATERS SATURDAY NIGHT, HOWEVER ANY WINDOW OF STRONG WINDS WOULD BE BRIEF SCA CONDITIONS WILL LIKELY CONTINUE HOWEVER AS WEST WINDS INCREASE THROUGH THE DAY SUNDAY WINDS AND WAVES FINALLY SLACKEN SUNDAY NIGHT INTO MONDAY

&&


GYX WATCHES/WARNINGS/ADVISORIES MENONE NHNONE MARINENONE

&&


NEAR TERMEKSTER SHORT TERMSCHROETER LONG TERMCANNON
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