Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 191521 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 1121 AM EDT TUE AUG 19 2014 .SYNOPSIS... HIGH PRESSURE BUILDS OVER NEW ENGLAND TODAY THROUGH WEDNESDAY. A WEAK FRONT WILL WASHOUT AS IT APPROACHES FROM THE GREAT LAKES LATE THIS WEEK. OTHERWISE...HIGH PRESSURE IS EXPECTED TO BUILD ACROSS THE WESTERN ATLANTIC FOR MUCH OF THE PERIOD. && .NEAR TERM /TODAY/... MADE MINOR UPDATES TO HOURLY TEMPERATURE TRENDS. OTHERWISE FORECAST REMAINS UNCHANGED. ORIGINAL DISCUSSION... HIGH PRESSURE BUILDS OVER THE REGION TODAY GIVING US MOSTLY SUNNY WEATHER WITH LIGHT WINDS. THIS ALLOWS A SEA BREEZE TO DEVELOP ALONG THE COAST. HIGHS WILL BE MOSTLY IN THE 70S...MAYBE AROUND 80 OVER SOUTHERN INTERIOR NH. VALLEY FOG AROUND EARLY THIS MORNING SHOULD BURN OFF FAIRLY QUICKLY EARLY THIS MORNING. && .SHORT TERM /TONIGHT AND WEDNESDAY/... HIGH PRESSURE REMAINS OVER THE REGION TONIGHT AND WEDNESDAY. THIS WILL GIVE US MOSTLY CLEAR SKIES WITH LIGHT WINDS TONIGHT ALLOWING TEMPERATURES TO COOL AND VALLEY FOG TO FORM AGAIN. OVERNIGHT LOWS WILL BE MOSTLY IN THE 40S...EXCEPT SOME LOWER TO MID 50S NEAR THE COAST AND PERHAPS SOME UPPER 30S IN THE NORMALLY COLDEST SPOTS IN THE MOUNTAINS OF NORTHERN NH AND WESTERN ME. THE VALLEY FOG SHOULD BURN OFF QUICKLY EARLY WEDNESDAY...LEAVING US WITH MOSTLY SUNNY SKIES IN THE MORNING BEFORE SOME HIGH/MID LEVEL CLOUDS MOVE IN FROM THE SW LATER IN THE DAY. THE LIGHT WINDS ALLOW FOR A SEA BREEZE TO DEVELOP ALONG THE COAST ON WEDNESDAY. HIGHS MAY BE A FEW DEGREES WARMER... MOSTLY IN THE MID 70S TO LOWER 80S. && .LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/... THE MODELS ARE IN GENERAL AGREEMENT ON THE LONG WAVE PATTERN THROUGH LATE THIS WEEK. WE BEGIN THE PERIOD WITH A WEAK IMPULSE AND ASSOCIATED SURFACE DISTURBANCE APPROACHING FROM THE GREAT LAKES. THE BLOCK AND HIGH PRESSURE CENTERED JUST OFFSHORE WILL SLOW THE EASTWARD PROGRESSION OF THE GREAT LAKES SYSTEM. ADDITIONALLY...ONSHORE FLOW AND INCREASING CLOUDS WILL RESULT IN SEVERAL DAYS OF SEASONABLY COOL WEATHER FOR THE TAIL-END OF THE WORKWEEK. THE RIDGE WILL ONCE AGAIN REESTABLISH ITSELF BY THE WEEKEND. BUT WITH THE SURFACE HIGH SITUATED OVER THE MARITIMES...WE`LL BE LOCKED INTO A COOL AND PERSISTENT EAST TO NORTHEAST FLOW WITH POTENTIAL FOR MARINE STRATUS TO EVENTUALLY IMPACT SOUTHERN AND COASTAL SECTIONS OF THE FORECAST AREA. && .AVIATION /15Z TUESDAY THROUGH SATURDAY/... SHORT TERM...VFR THRU THE SHORT TERM FORECAST PERIOD EXCEPT IFR/LIFR IN VALLEY FOG THRU EARLY THIS MORNING AND AGAIN LATE TONIGHT INTO EARLY WEDNESDAY. FOG WILL MAINLY IMPACT HIE AND LEB AND PERHAPS CON. LONG TERM... THU - FRI...SCATTERED MVFR POSSIBLE IN SHOWERS. && .MARINE... SHORT TERM... HIGH PRESSURE KEEPS WINDS AND SEAS WELL BELOW SCA LEVELS THRU THE SHORT TERM FORECAST PERIOD. LONG TERM... WINDS AND SEAS ARE EXPECTED TO REMAIN BELOW SMALL CRAFT THRESHOLD. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. && $$ NEAR TERM UPDATE... KIMBLE

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