Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 280427 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 1127 PM EST THU NOV 27 2014 .SYNOPSIS...
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A TROUGH OF LOW PRESSURE WILL LINGER OVER NEW ENGLAND TONIGHT AND COULD PRODUCE CLOUDS AND A FEW FLURRIES. HIGH PRESSURE WILL BUILD IN FROM THE WEST LATE FRIDAY WILL SHIFT OFFSHORE ON SATURDAY. A WARM FRONT WILL LIFT NORTH THROUGH THE REGION SATURDAY NIGHT. A COLD FRONT WILL APPROACH FROM THE WEST SUNDAY AND WILL CROSS THE REGION SUNDAY NIGHT. HIGH PRESSURE WILL GRADUALLY BUILD IN FROM THE WEST MONDAY THROUGH TUESDAY. HIGH PRESSURE WILL SHIFT OFFSHORE TUESDAY NIGHT AND WILL BE FOLLOWED BY A COLD FRONT ON WEDNESDAY.
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&& .NEAR TERM /UNTIL 6 AM FRIDAY MORNING/...
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1120 PM...BASED ON LATEST MESOSCALE MODELS...RAP/HRRR/NAM12...HAVE ADJ POPS/QPF/SNOW REGARDING THE WEAK MID LVL TROUGH WORKING THROUGH AND SUBSEQUENT INVERTED TROUGH OVER THE GULF OF ME. BACKED OFF POPS WITH LKLY POPS LIMITED TO ROCKINGHAM AND SOUTHERN MERRIMACK CTYS. BEST CHC FOR SHIN AND LIGHT OCCAMS WILL BE A COUPLE HOURS EITHER SIDE OF SUNRISE. ALTHOUGH UP TO AN INCH IS POSSIBLE IN THESE AREAS...MOST PLACES LOOK TO SEE A DUSTING. ALSO WOUND DOWN THE POPS BY MIDDAY FRIDAY ACROSS ALL BUT THE FAR NRN ZONES. PREV DISCUSSION: BELOW NORMAL - - VERY COLD TEMPERATURES EXPECTED OVERNIGHT IN AREA WHERE NO POWER OR HEAT CONTINUES FOR MANY RESIDENTS. WEAK SHORT WAVE ROTATING THROUGH THE UPPER TROUGH...INCOMBINATION WITH A DEVELOPING INVERTED TROUGH EXTENDING NORTHWESTWARD FROM A DEVELOPING OFFSHORE SYSTEM WILL LIKLEY ROTATE SNOW SHOWERS INTO THE REGION TONIGHT. RADAR TRENDS ARE RELATIVELY IMPRESSIVE THIS AFTERNOON ASSOCIATED WITH THIS WEAK FEATURE. PRECIP SHOULD ARRIVE THIS EVENING AS LOW CLOUDS HAVE ALREADY RETURNED AHEAD OF THE SYSTEM. FAR SOUTHEAST NH AND PORTIONS OF COASTAL YORK COUNTY MAINE MAY PICK UP A DUSTING TO TWO INCHES OF SNOW FROM THIS SYSTEM. THE SNOW SHOULD BE DRY...LIGHT AND POWDERY COMPARED TO THE HEAVY WET CONDITIONS OF LAST NIGHT. WITH RELATIVELY HIGH SNOW RATIOS...THIS BAND OF SNOW SHOWERS WILL NEED TO BE MONITORED CLOSELY FOR THE LOW POSSIBILITY OF LOCALIZED HIGHER SNOWFALL AMOUNTS. TEMPERATURES WILL BE WIDESPREAD TEENS FOR OVERNIGHT LOWS. THIS IS WELL BELOW NORMAL FOR THIS TIME OF THE YEAR.
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&& .SHORT TERM /6 AM FRIDAY MORNING THROUGH FRIDAY NIGHT/... SNOW SHOWERS MAY CONTINUE OVER THE SAME REGION FRIDAY MORNING...BEFORE ANOTHER SHORT WAVE TROUGH SLOWLY EXITS THE REGION. AFTER DAYTIME HIGHS MOSTLY IN THE MID 20S TO LOWER 30S...VERY COLD TEMPERATURES ARE EXPECTED ONCE AGAIN FRIDAY NIGHT. WITH LIGHT WINDS AND RADIATIONAL COOLING...TEMPERATURES WILL PLUMMET INTO THE SINGLE NUMBERS IN MOST AREAS AWAY FROM THE COAST. && .LONG TERM /SATURDAY THROUGH THURSDAY/... HIGH PRESSURE WILL CREST OVER THE REGION EARLY SATURDAY AND WILL THEN SHIFT OFFSHORE. OVER-RUNNING PATTERN SETTING UP TO THE WEST WILL BRING VARIABLE HIGH CLOUDS INTO THE REGION. TEMPERATURES WILL REMAIN WELL BELOW NORMAL WITH HIGHS RANGING THROUGH THE 20S NORTH AND UPPER 20S TO LOWER 30S SOUTH. A WARM FRONT WILL LIFT NORTH THROUGH THE REGION SATURDAY NIGHT AND SUNDAY. INCREASING ONSHORE FLOW WILL BRING OCEAN STRATUS IN OVERNIGHT. MAY SEE SOME SPOTTY SNOW SHOWERS...ESPECIALLY IN NORTHERN ZONES...BUT LITTLE IF ANY ACCUMULATIONS. SUNDAY LOOKING RATHER DREARY BUT MILDER AS THE WARM FRONT LIFTS NORTH OF THE REGION. HIGH TEMPS WILL RANGE FROM THE UPPER 30S TO LOWER 40S NORTH AND LOWER TO MID 40S SOUTH. COLD FRONT WILL PUSH THROUGH THE REGION SUNDAY NIGHT WITH A FEW WIDELY SCATTERED SHOWERS. LOWS WILL RANGE FROM THE MID 30S TO LOWER 40S. COLD FRONT PUSHES OFFSHORE EARLY MONDAY. HIGH PRESSURE WILL GRADUALLY BUILD IN FROM THE WEST IN THE AFTERNOON. UPPER TROUGH SWINGING IN FROM THE WEST WILL KEEP VARIABLE CLOUDS IN THE FORECAST. HIGH TEMPS WILL RANGE THROUGH THE 40S IN MOST LOCATIONS. HIGH PRESSURE WILL CONTINUE TO BUILD IN FROM THE WEST MONDAY NIGHT AND TUESDAY. VARIABLE CLOUDS MONDAY NIGHT WILL GIVE WAY TO MOSTLY SUNNY SKIES ON TUESDAY AS HIGH PRESSURE CRESTS OVER THE REGION. DESPITE THE SUN HIGHS WILL AGAIN TOP OUT BELOW NORMAL WITH 20S IN THE NORTH AND UPPER 20S TO LOWER 30S SOUTH. HIGH PRESSURE WILL SHIFT OFFSHORE TUESDAY NIGHT AS A COLD FRONT APPROACHES FROM THE WEST. THIS WILL BRINGING INCREASING CLOUDS AFTER MIDNIGHT AND A CHANCE OF SNOW SHOWERS TOWARD DAYBREAK IN WESTERN ZONES. FRONT WILL CROSS THE REGION ON WEDNESDAY ACCOMPANIED BY SNOW SHOWERS IN THE NORTH AND RAIN OR SNOW SHOWERS IN THE SOUTH. && .AVIATION /04Z FRIDAY THROUGH TUESDAY/... SHORT TERM...LOCALLY IFR CONDITIONS MAY DEVELOP OVER SOUTHEAST NEW HAMPSHIRE AND EXTREME SOUTHWEST MAINE TONIGHT AND FRIDAY MORNING IN SNOW SHOWERS. OTHERWISE VFR CONDITIONS. LONG TERM...VFR SATURDAY. MVFR/IFR CEILINGS DEVELOPING SATURDAY NIGHT AND PERSISTING THROUGH SUNDAY NIGHT. VFR MONDAY THROUGH TUESDAY. && .MARINE... SHORT TERM...SCAS NOW IN EFFECT FOR TONIGHT FOR SEAS ONLY. LONG TERM...SCA`S LIKELY SUNDAY. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS UNTIL 6 AM EST FRIDAY FOR ANZ150-152-154. && $$ SYNOPSIS... NEAR TERM...CEMPA SHORT TERM... LONG TERM... AVIATION... MARINE...

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