Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 061644 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 1144 AM EST FRI MAR 6 2015 .SYNOPSIS... HIGH PRESSURE WILL BUILD SOUTH OF NEW ENGLAND TODAY. A COLD FRONT WILL APPROACH FROM THE NORTHWEST ON SATURDAY AND WILL CROSS THE AREA SATURDAY NIGHT. WEAK HIGH PRESSURE WILL BUILD IN FROM THE NORTHWEST SUNDAY. A WEAK COLD FRONT WILL CROSS THE REGION ON MONDAY. A WARM FRONT WILL CROSS THE REGION ON TUESDAY. HIGH PRESSURE WILL BUILD SOUTH OF NEW ENGLAND ON WEDNESDAY. && .NEAR TERM /THROUGH TODAY/...
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16Z UPDATE...CLEAR AND QUIET WEATHER WILL CONTINUE THROUGH THE REMAINDER OF THE AFTERNOON AS HIGH PRESSURE CRESTS OVERHEAD. TEMPERATURES RUNNING WELL BELOW NORMAL WILL TOP OUT FROM THE MIOD TEENS NORTH TO THE LOWER 20S SOUTH. ASIDE FROM A FEW TEMPERATURES TWEAKS NO OTHER CHANGES PLANNED FOR THE FORECAST ATTM. PREV DISC... THIS MORNING WILL BEGIN WITH ARCTIC AIR ONCE AGAIN OVER THE REGION. TEMPERATURES WILL BEGIN THE DAY WITH READINGS IN THE SINGLE NUMBERS AT THE COAST TO AS COLD AS 20 BELOW ZERO IN THE MOUNTAINS. IT WILL BE MAINLY SUNNY TODAY WITH SOME CLOUDINESS REMAINING TRAPPED IN THE MOUNTAINS. HIGHS WILL MAINLY BE BETWEEN 15 AND 20 DEGREES FROM NORTH TO SOUTH...HOWEVER THIS MAY BE CONSERVATIVE WITH THE STRONG MARCH SUN.
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&& .SHORT TERM /SATURDAY/... WHILE TONIGHT WILL BE YET ANOTHER VERY COLD NIGHT...SOME SOUTHWESTERLY GRADIENT WILL KEEP READINGS FROM COMPLETELY BOTTOMING OUT ACROSS THE REGION...ALBEIT EXPECT SOME READINGS BELOW ZERO IN THE MOUNTAINS. THE CHANCE FOR LIGHT SNOWFALL WILL GRADUALLY INCREASE IN THE MOUNTAINS LATE ON SATURDAY AS A WEAK FRONT APPROACHES FROM THE WEST. THIS SYSTEM IS MOISTURE STARVED...SO VERY LITTLE IN THE WAY OF SNOWFALL IS EXPECTED OVER THE FAR NORTH AS THE SHORT WAVE APPROACHES FROM THE WEST. && .LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/... SHORTWAVE TROUGH CROSSES THE AREA SATURDAY NIGHT WITH ANY LIGHT SNOW LIKELY LIMITED TO THE MOUNTAINS. GRADUALLY MODERATING AIR MASS WILL ALLOW TEMPERATURES TO SLOWLY RISE SUNDAY AND MONDAY. BY TUESDAY THE ENTIRE AREA SHOULD RISE ABOVE FREEZING... WITH MUCH OF THE SOUTHERN AND COASTAL AREAS SEEING LOW 40S. BUT A COLD FRONT WILL MOVE THROUGH THE AREA DURING THE DAY ON WEDNESDAY... WITH MUCH COLDER AIR BEHIND IT. COOLING WILL BE LIMITED BY DOWNSLOPING CONDITIONS DOWNWIND OF THE MOUNTAINS INITIALLY ON WEDNESDAY... BUT BY WEDNESDAY NIGHT AND THURSDAY THE COLD AIR TAKES A FIRMER HOLD OVER THE AREA. WENT BELOW MODEL GUIDANCE VALUES FOR THURSDAY HIGH TEMPERATURES AS THERE IS NOW A FAIR CONSENSUS THAT THE COLD AIR WILL BE IN FULL CONTROL BY THAT POINT. TEMPERATURES MAY NOT RISE ABOVE FREEZING FOR A COUPLE OF DAYS WHILE THIS COLD AIR MASS LINGERS OVER THE AREA. NO SIGNIFICANT PRECIPITATION EXPECTED OVER THE NEXT SEVERAL DAYS AS ANY WAVES PASSING THROUGH THE FLOW LACK A CONNECTION TO ANY MOISTURE SOURCE. && .AVIATION /18Z FRIDAY THROUGH WEDNESDAY/... SHORT TERM...VFR CONDITIONS ARE EXPECTED OVER THE ENTIRE PERIOD WITH HIGH PRESSURE OVERHEAD. LONG TERM...GENERALLY VFR CONDITIONS EXPECTED THROUGH MIDWEEK. SOME MVFR CONDITIONS IN SNOW SHOWERS ARE POSSIBLE SATURDAY NIGHT IN THE MOUNTAINS. && .MARINE... SHORT TERM...COLD AIR ADVECTION OVER THE COASTAL WATERS WILL CREATE GUSTY WINDS FOR A FEW MORE HOURS. WILL HOLD ONTO THE SMALL CRAFT AND FREEZING SPRAY ADVISORIES UNTIL 7 AM. LONG TERM...WEAK PRESSURE GRADIENT ACROSS THE AREA KEEPS WINDS RELATIVELY LIGHT THROUGH THE BEGINNING OF NEXT WEEK. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. && $$

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