Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 290347 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 1147 PM EDT SAT MAR 28 2015 .SYNOPSIS... HIGH PRESSURE WILL BUILD IN FROM THE WEST THROUGH SUNDAY. A COLD FRONT WILL APPROACH FROM THE WEST ON MONDAY AND WILL CROSS THE REGION MONDAY NIGHT. A WEAK AREA OF LOW PRESSURE WILL PASS SOUTH OF THE REGION ON TUESDAY. HIGH PRESSURE WILL BUILD IN FROM THE WEST TUESDAY NIGHT THROUGH WEDNESDAY. LOW PRESSURE CROSSING SOUTHERN CANADA THURSDAY WILL DRIVE A COLD FRONT TOWARD THE AREA. THE FRONT WILL CROSS THE REGION THURSDAY NIGHT. HIGH PRESSURE WILL BUILD IN FROM THE WEST ON FRIDAY. && .NEAR TERM /UNTIL 6 AM SUNDAY MORNING/... 1145 PM...QUICK UPDATE TO DROP POPS CLOSE TO ZERO IN THE VERY NEAR TERM...AND EVENTUALLY DOWN TO ZERO IN THE PRE-DAWN. MOVED CLOUDS OUT OF THE S AND E A LITTLE QUICKER. MADE SOME TWEAKS TO T/TD AS WELL...WITH MINS A TOUCH WARMER IN A FEW SPOTS. PREVIOUSLY... HAVE UPDATED THE GRIDS THIS EVENING. LATEST RADAR IMAGERY CONTINUES TO SHOW DRY AIR FILTERING IN FROM THE NORTH...ALLOWING THE ECHOES TO SHIFT TO THE SOUTH AND DISSIPATE. MOST OF THE SNOW SHOWERS HAVE DISSIPATED WITH JUST PERHAPS A FEW FLURRIES CONTINUING OVER THE NEXT COUPLE OF HOURS. SNOWFALL REPORTS RANGED FROM ZERO EASTERN AREAS TO NEARLY 3 INCHES OVER PORTIONS OF SOUTHERN NEW HAMPSHIRE. MADE MINOR ADJUSTMENTS TO THE DEW POINT AND CLOUD GRIDS. MIN TEMPERATURES REMAIN FROM THE SINGLE NUMBERS IN THE NORTH TO AROUND 20 DEGREES ALONG THE COAST. PREV DISC... OVERNIGHT LOWS WILL RANGE FROM THE UPPER SINGLE DIGITS NORTH TO LOWER 20S ALONG THE COAST. THIS WILL BE DUE TO COLDER AIR DRAWN INTO THE AREA AND DAMMING ALONG THE HIGHER TERRAIN AND CLOUDS RAPIDLY MOVING OUT OF THE AREA AFTER MIDNIGHT AS HIGH PRESSURE PUSHES IN FROM THE WEST. STILL... WENT A FEW DEGREES ABOVE GUIDANCE AS WEST WINDS ALONG THE NORTHERN PERIPHERY OF THE HIGH WILL KEEP THE FLOW FROM BEING NON ZERO AND WILL NOT BENEFIT FROM HAVING THE ENTIRE NIGHT FOR RADIATIONAL COOLING. && .SHORT TERM /6 AM SUNDAY MORNING THROUGH SUNDAY NIGHT/... HIGH PRESSURE BUILDS IN FOR SUNDAY WITH WINDS INITIALLY NW AND THEN SW AS HIGH PRESSURE SAGS TO OUR SE. SUNDAY WILL BE MOSTLY SUNNY WITH TEMPERATURES WARMING INTO THE MID 30S NORTH TO UPPER 30S/LOWER 40S SOUTH. LOW PRESSURE ORGANIZES IN SOUTHERN CANADA NORTH OF THE GREAT LAKES SUNDAY EVENING IN RESPONSE TO A WEAK NORTHERN STREAM WAVE. OVERNIGHT LOWS SUNDAY NIGHT OCCUR FAIRLY EARLY AS WARM AIR ADVECTION REGIME DEVELOPS AHEAD OF THIS APPROACHING SYSTEM. SHOWERS SHOULD HOLD OFF UNTIL MONDAY MORNING HOWEVER. && .LONG TERM /MONDAY THROUGH SATURDAY/... RATHER QUIET WEEK AHEAD IN THE EXTENDED FORECAST. LOW PRESSURE CROSSING SOUTHERN CANADA ON MONDAY WILL DRIVE A COLD FRONT TOWARD THE REGION. AFTER SOME MORNING SUN EXPECT CLOUDS TO QUICKLY OVER-SPREAD THE REGION. BOUNDARY LAYER TEMPS WILL SUPPORT MOSTLY SNOW SHOWERS ACROSS MUCH OF THE REGION...BUT WILL BECOME WARMER ENOUGH IN SOUTHERN ZONES MONDAY AFTERNOON FOR JUST RAIN SHOWERS. IN ANY CASE EXPECT QPF TO BE LIGHT AND SPOTTY WITH LITTLE IMPACT AND HIGHEST AMOUNTS IN THE NORTH WHERE SNOW ACCUMULATIONS WILL GENERALLY BE AN INCH OR LESS. HIGHS WILL REACH THE MID 30S TO LOWER 40S NORTH AND LOWER TO MID 40S SOUTH. COLD FRONT WILL PUSH OFFSHORE MONDAY EVENING. EXPECT PARTIAL CLEARING DOWNWIND OF THE MOUNTAINS OVERNIGHT. EXPECT CLOUDS TO HANG TOUGH IN THE USUAL UPSLOPE AREAS IN THE NORTH. LOW TEMPS WILL RANGE THROUGH THE 20S. WEAK SHORTWAVE WILL SWING THROUGH SOUTHERN NEW ENGLAND ON TUESDAY BRUSHING SOUTHERN NEW HAMPSHIRE WITH AFTERNOON CLOUDS BUT ANY ASSOCIATED PRECIP SHOULD REMAIN SOUTH OF THE FORECAST AREA. REMAINDER OF THE FORECAST AREA WILL SEE PARTLY TO MOSTLY SUNNY SKIES. HIGHS WILL RANGE FROM THE MID 30S NORTH TO MID 40S SOUTH. HIGH PRESSURE BUILDING IN FROM THE WEST TUESDAY NIGHT AND WEDNESDAY WILL BRING MOSTLY CLEAR SKIES. AFTER A CHILLY START...HIGHS WEDNESDAY WILL REBOUND INTO THE LOWER TO MID 40S IN SOUTHERN ZONES AND WILL RANGE THROUGH THE 30S NORTH. HIGH PRESSURE WILL SLIDE OFFSHORE WEDNESDAY NIGHT AND RETURN FLOW WILL BRING WARMER AIR BACK INTO THE REGION. A WARM FRONT PASSING TO THE NORTHWEST OF THE FORECAST AREA WILL BRING INCREASING CLOUDS AND A CHANCE OF A SNOW SHOWER BY THURSDAY MORNING. CLOUDS WILL LIFT NORTH OF THE REGION IN THE AFTERNOON WITH SOME SUNNY BREAKS DEVELOPING. HIGHS WILL RANGE FROM THE LOWER TO MID 40S NORTH TO THE MID 40S TO LOWER 50S SOUTH. COLD FRONT WILL PUSH EAST THROUGH THE REGION THURSDAY EVENING WITH A BRIEF ROUND OF RAIN SHOWERS. EXPECT CLEARING SKIES AFTER MIDNIGHT AS THE FRONT QUICKLY SHIFTS OFFSHORE. HIGH PRESSURE WILL BUILD IN FROM THE WEST ON FRIDAY PRODUCING ANOTHER MOSTLY SUNNY DAY. && .AVIATION /04Z SUNDAY THROUGH THURSDAY/... SHORT TERM...CONDITIONS SHOULD IMPROVE IN THE NEXT FEW HOURS AS LOW CEILINGS/MOISTURE SOURCE MOVES AWAY WELL SOUTH OF NOVA SCOTIA. UNTIL THEN MIXED CONDITIONS WILL BE PRESENT ACROSS THE AREA. N/NNW WINDS WILL DIMINISH SOMEWHAT TO AOB 10 KTS. LONG TERM...AREAS OF MVFR CEILINGS DEVELOPING MONDAY...BECOMING VFR MONDAY NIGHT. VFR TUESDAY THROUGH THURSDAY. && .MARINE... SHORT TERM...SCA CONDITIONS CONTINUE THROUGH TOMORROW AFTERNOON. DID TRIM THE ENDING TIME BACK A FEW HOURS. LONG TERM...SCA`S LIKELY ON MONDAY AND TUESDAY. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS UNTIL 2 PM EDT SUNDAY FOR ANZ150-152-154. && $$ SYNOPSIS... NEAR TERM...CEMPA SHORT TERM... LONG TERM... AVIATION... MARINE...

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