Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 291602 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 1102 AM EST THU JAN 29 2015 .SYNOPSIS... HIGH PRESSURE WILL BUILD EAST AND CREST ACROSS THE REGION TODAY. ANOTHER STORM SYSTEM WILL BRING SNOWFALL TO THE AREA LATE TONIGHT THROUGH EARLY SATURDAY. HIGH PRESSURE FOLLOWS OVER THE WEEKEND...WITH ANOTHER SYSTEM MOVING SOUTH OF NEW ENGLAND ON MONDAY. HIGH PRESSURE WILL FOLLOW MIDWEEK. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... 11 AM...UPDATED TEMPS TO REFLECT A LITTLE SLOWER CLIMB IN TEMPS AWAY FROM THE COAST...AND ONLY A SLIGHT DROP OFF AFTER PEAK HEATING. ALSO...BACKED OFF ON SKY AS MOST OF WHAT WILL MOVE IN DURING THE AFTERNOON WILL BE TRANSPARENT CIRRUS. PREV DISC... AT 08Z...A 1030 MILLIBAR ARCTIC HIGH WAS BUILDING EAST INTO NEW ENGLAND. CLEAR SKIES...LIGHT WINDS AND FRESH SNOWPACK HAD ALLOWED TEMPERATURES TO TUMBLE BELOW ZERO ACROSS MUCH OF THE INTERIOR. AFTER A CHILLY START...TEMPERATURES SHOULD REBOUND INTO THE 20S IN MANY LOCATIONS UNDER SUNNY SKIES. WE`LL SEE SOME INCREASING CLOUDS THIS AFTERNOON IN ADVANCE OF THE NEXT DISTURBANCE OVER WESTERN SECTIONS OF THE FORECAST AREA. && .SHORT TERM /6 PM THIS EVENING THROUGH FRIDAY NIGHT/... CLOUDS THICKEN QUICKLY TONIGHT...WITH LIGHT SNOW GRADUALLY SPREADING EAST ACROSS THE AREA BY DAWN AHEAD OF THE SYSTEM APPROACHING FROM THE GREAT LAKES. LOW TEMPERATURES SHOULD OCCUR EARLY...THEN REMAIN STEADY OE EVEN RISE A DEGREE OR TWO AS CLOUD COVER INCREASES AND LOWERS ACROSS THE REGION. ON FRIDAY...THE UPPER TROUGH BEGINS TO GO NEGATIVE AND EVENTUALLY CLOSES OFF. AT THE SURFACE...LOW PRESSURE WILL SLOW DOWN AND INTENSIFY AS IT SLIDES OFFSHORE. SNOW BECOMES HEAVY AT TIMES BY AFTERNOON THEN CONTINUES INTO FRIDAY NIGHT. IT GRADUALLY TAPERS TO FLURRIES FROM SOUTHWEST TO NORTHEAST BY SATURDAY MORNING...WITH HIGHEST SNOW TOTALS FOUND FROM THE MAINE MIDCOAST NORTHWARD ACROSS THE CAPITAL DISTRICT INTO THE KENNEBEC VALLEY. THERE WILL BE A DISTINCT SOUTHWEST TO NORTHEAST GRADIENT TO SNOW TOTALS...RANGING FROM 3 OR 4 INCHES IN EXTREME SOUTHWEST NEW HAMPSHIRE TO AROUND A FOOT VICINITY OF THE MIDCOAST AND KENNEBEC VALLEY. THE WINTER STORM WATCH HAS BEEN REPLACED WITH A WARNING IN OUR MAINE ZONES...WITH A WINTER WEATHER ADVISORY ISSUED FOR NEW HAMPSHIRE. GUSTY NORTHWEST WINDS WILL DRAW MUCH COLDER AIR BACK INTO THE REGION LATE FRIDAY NIGHT BEHIND THE OFFSHORE LOW. && .LONG TERM /SATURDAY THROUGH WEDNESDAY/... LOW PRESSURE IN THE GULF OF MAINE EXITS INTO THE MARITIMES SATURDAY MORNING. CLEARING TAKES PLACE IN ITS WAKE FROM WEST TO EAST ALONG WITH GUSTY NORTHWEST WINDS AND VERY COLD TEMPERATURES. CANADIAN HIGH PRESSURE BUILDS ACROSS THE REGION THE REST OF THE WEEKEND. A STRONG PROGRESSIVE SHORT WAVE MOVES ACROSS THE OHIO VALLEY LATE SUNDAY AND WILL BE SHEARED AS IT PASSES OFF THE MID ATLANTIC COAST HARMLESSLY MONDAY. IT WILL PASS WELL SOUTH OF OUR AREA BRINGING NOTHING MORE THAN A CHANCE OF LIGHT SNOW OVER SOUTHERN AREAS MONDAY. THEN, A CONTINUED COLD BUT GENERALLY DRY PATTERN OCCURS THROUGH THE MIDWEEK. && .AVIATION /15Z THURSDAY THROUGH MONDAY/... SHORT TERM...MVFR WITH AREAS OF IFR DEVELOPING AFTER MIDNIGHT FROM WEST TO EAST IN SNOW. WIDESPREAD IFR FRIDAY AND FRIDAY NIGHT IN SNOW...GRADUALLY IMPROVING TO VFR ON SATURDAY. NW WIND GUSTING TO 25 KT DEVELOPING FOR LATE FRI NIGHT AND SAT. LONG TERM...CONDITIONS WILL IMPROVE TO VFR ACROSS ALL TERMINALS SATURDAY AND REMAIN VFR THROUGH THE WEEKEND. && .MARINE... SHORT TERM...WINDS AND SEAS BELOW SMALL CRAFT THROUGH TONIGHT THEN STEADILY INCREASING WITH GALES LIKELY BY FRIDAY NIGHT. LONG TERM...GALES WILL LKLY BE NEEDED IN NW FLOW LATE FRI NIGHT INTO SAT. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...WINTER STORM WARNING FROM 1 AM FRIDAY TO 6 AM EST SATURDAY FOR MEZ007-008-012-013-018>020-023-024. WINTER STORM WARNING FROM 3 AM FRIDAY TO 10 AM EST SATURDAY FOR MEZ009-014-021-022-025>028. NH...WINTER WEATHER ADVISORY FROM 11 PM THIS EVENING TO 6 AM EST SATURDAY FOR NHZ001>015. MARINE...NONE. && $$ SYNOPSIS... NEAR TERM...CEMPA SHORT TERM... LONG TERM... AVIATION... MARINE...

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