Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 251313 AAA AFDGYX AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE GRAY ME 813 AM EST WED FEB 25 2015 .SYNOPSIS... A COLD FRONT WILL CROSS THE AREA TODAY WHILE LOW PRESSURE PASSES BY OFFSHORE. THE OFFSHORE LOW WILL PRODUCE A PERIOD OF SNOW THIS MORNING ALONG THE COAST AND INTO MIDCOAST AND CENTRAL MAINE...BEFORE RACING INTO THE MARITIMES. HIGH PRESSURE FOLLOWS THIS SYSTEM FOR THURSDAY INTO THE START OF NEXT WEEKEND. THE NEXT CHANCE FOR PRECIPITATION WILL COME AS HIGH PRESSURE RETREATS LATE IN THE WEEKEND OR EARLY NEXT WEEK. && .NEAR TERM /UNTIL 6 PM THIS EVENING/...
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UPDATE...MODERATE SNWFL...WITH EMBEDDED HEAVY RATES LIKELY...CONTINUES TO SLOWLY EDGE EWD ACROSS MIDCOAST ME. WITH REPORTS OF 5 TO 6 INCHES OF SNWFL ALREADY THIS MORNING...AND AN ADDITIONAL 2 TO 4 INCHES POSSIBLE I HAVE ISSUED A WINTER STORM WARNING FOR LINCOLN...KNOX...AND WALDO COUNTIES. EXPANDED ADVISORIES NWD INTO KENNEBEC AND SRN SOMERSET AS WELL. CLEARING WILL RAPIDLY OCCUR FROM THE W THRU THIS AFTERNOON...BUT SEVERAL HOURS OF SNWFL ARE LEFT FOR THE COUNTIES CURRENTLY IN THE WARNING. PREV DISC... AT 07Z...A 995 MILLIBAR SURFACE LOW WAS VICINITY OF HUDSON BAY WITH TRAILING COLD FRONT THROUGH THE EASTERN GREAT LAKES. A 998 MILLIBAR LOW WAS CENTERED OFF THE CAROLINA COAST. THE TWO SYSTEMS WILL MERGE LATER TODAY TO THE NORTHEAST OF THE FORECAST AREA AND INTENSIFY. THE CURRENT SNOW SHIELD FROM THE SOUTHERN LOW COVERED SOUTHEAST NEW ENGLAND AND EXTENDED NORTHWARD INTO SOUTHEAST NEW HAMPSHIRE AND WESTERN MAINE. MODELS CONTINUE TO SHOW A SHARP WEST TO EAST GRADIENT IN SNOWFALL AND WE`VE MADE SLIGHT ADJUSTMENTS TO SNOW TOTALS TO REFLECT LATEST RADAR TRENDS. THIS WILL BE A QUICK HITTING SYSTEM WITH MUCH OF THE SNOW ON THE GROUND BY THE MORNING COMMUTE. THE EXCEPTION WILL BE MIDCOAST AND CENTRAL MAINE WHERE THE SNOW WILL END AN HOUR OR TWO LATER. OUTSIDE OF THE HIGHER TERRAIN...A DRIER WESTERLY FLOW AND DOWNWARD MOTION TAKES HOLD BY MIDDAY WITH PARTIAL CLEARING AND HIGH TEMPERATURES IN THE 20S TO LOWER 30S.
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&& .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM THURSDAY/... WINDS DROP OFF TONIGHT WITH MAINLY CLEAR SKIES AND WE`LL DROP INTO THE SINGLE NUMBERS ABOVE ZERO NEAR THE COAST...WITH MANY INLAND LOCATIONS NEAR ZERO AND THE MOUNTAINS 5 TO 10 BELOW. ON THURSDAY...WE`LL SEE CLOUDS SPREAD MAINLY INTO SOUTHERN AND CENTRAL SECTIONS AS A DISTURBANCE PASSES WELL TO OUR SOUTH WHILE HIGH PRESSURE BEGINS TO BUILD IN FROM THE WEST. IT`LL AVERAGE A GOOD TEN DEGREES COLDER THEN TODAY WITH HIGH TEMPERATURES RANGING FROM SINGLE NUMBERS IN THE MOUNTAINS TO TEENS AND LOWER 20S ELSEWHERE. && .LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/... VARIABLE HIGH CLOUDS THURSDAY NIGHT WILL GIVE WAY TO CLEARING SKIES AFTER MIDNIGHT AS HIGH PRESSURE BUILDS IN FROM THE WEST. LOW TEMPS WILL BOTTOM OUT 5 TO 15 BELOW NORTH AND 5 BELOW TO 5 ABOVE SOUTH. HIGH PRESSURE WILL CONTINUE TO BUILD IN FROM THE WEST FRIDAY PRODUCING MOSTLY SUNNY SKIES. DESPITE THE SUN...TEMPERATURES WILL REMAIN BELOW NORMAL WITH HIGHS RANGING THROUGH THE TEENS NORTH AND UPPER TEENS TO LOWER 20S SOUTH. FAIR WEATHER CONTINUES FRIDAY NIGHT AND SATURDAY AS HIGH PRESSURE CONTINUES TO BUILD SOUTH OF THE REGION. MORE SUB ZERO READINGS ON TAP FRIDAY NIGHT AS MOST OF THE FORECAST AREA SEES LOWS OF ZERO TO 10 BELOW. PLENTY OF SUN FOR SATURDAY ALONG WITH A SLIGHT MODERATION IN TEMPS. HIGHS WILL REACH 15 TO 20 NORTH AND THE LOWER TO MID 20S SOUTH. HIGH PRESSURE WILL CREST OVER THE REGION SATURDAY NIGHT. MOSTLY CLEAR SKIES AND LIGHT WINDS WILL ALLOW TEMPS TO ONCE AGAIN FALL TO WELL BELOW NORMAL LEVELS. LOWS WILL RANGE FROM ZERO TO 5 BELOW NORTH AND ZERO TO 5 ABOVE SOUTH. HIGH PRESSURE WILL SHIFT OFFSHORE SOUTH OF NEW ENGLAND ON SUNDAY. COLD FRONT APPROACHING FROM THE NORTHWEST WILL BRING INCREASING HIGH CLOUDS INTO THE REGION IN THE AFTERNOON. HIGH TEMPS WILL RANGE THROUGH THE 20S TO NEAR 30 IN THE SOUTH. COLD FRONT DROPPING SOUTH FROM CANADA WILL BRING THICKENING CLOUDS AND A PERIOD OF SNOW SHOWERS TO THE REGION SUNDAY NIGHT THROUGH MONDAY MORNING. EXPECT ANY ACCUMULATION TO BE LIGHT WITH JUST AN INCH OR TWO POSSIBLE. EXPECT THIS ACTIVITY TO PUSH OFFSHORE DURING THE MORNING HOURS AS HIGH PRESSURE BUILDS IN FROM THE WEST. NOT MUCH IN THE WAY OF COLD AIR BEHIND THE FRONT AND HIGH TEMPS WILL ACTUALLY TOP OUT AT OR NEAR NORMAL WITH HIGHS RANGING THROUGH THE 30S. && .AVIATION /13Z WEDNESDAY THROUGH SUNDAY/... SHORT TERM...MVFR THIS MORNING VCNTY OF KPSM...KPWM...KAUG AND KRKD WITH LCL IFR PSBL IN SNOW...THEN IMPROVING TO VFR AFT 15Z THROUGHOUT. LONG TERM...VFR THURSDAY NIGHT THROUGH SUNDAY. && .MARINE... SHORT TERM...SMALL CRAFT THROUGH LATE TONIGHT AS LOW PRESSURE PASSES BY OFFSHORE...ALONG WITH A SURFACE COLD FRONT CROSSING THE WATERS. LONG TERM...NO PROBLEMS NOTED. && .GYX WATCHES/WARNINGS/ADVISORIES...
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ME...WINTER STORM WARNING UNTIL NOON EST TODAY FOR MEZ022-026>028. WINTER WEATHER ADVISORY UNTIL NOON EST TODAY FOR MEZ014-021. NH...NONE. MARINE...SMALL CRAFT ADVISORY UNTIL 5 AM EST THURSDAY FOR ANZ151-153. SMALL CRAFT ADVISORY UNTIL 5 AM EST THURSDAY FOR ANZ150-152- 154.
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&& $$ NEAR TERM...LEGRO

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