Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 251920 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 320 PM EDT MON AUG 25 2014 .SYNOPSIS... HIGH PRESSURE WILL HOLD OVER THE NORTHEAST THROUGH TUESDAY. A COLD FRONT WILL MOVE IN FROM THE NORTHWEST ON WEDNESDAY...BRINGING A CHANCE OF SHOWERS OR THUNDERSTORMS...BUT NOT BEFORE WE SEE ANOTHER WARM AND HUMID DAY. HIGH PRESSURE WILL GRADUALLY BUILD IN FROM THE WEST THURSDAY AND FRIDAY...SHIFTING OFFSHORE BY SATURDAY. A WARM FRONT MOVES INTO THE AREA SATURDAY NIGHT...AND COULD STALL OVER THE REGION SUNDAY INTO MONDAY. && .NEAR TERM /THROUGH TONIGHT/... MAINLY CLEAR SKIES WILL CONTINUE OVERNIGHT WITH DEW POINT VALUES REMAINING IN THE LOWER 60S IN MANY AREAS. AREAS OF FOG WILL DEVELOP ONCE AGAIN...MOSTLY IN THE INTERIOR VALLEY LOCATIONS. && .SHORT TERM /TUESDAY AND TUESDAY NIGHT/... READINGS WILL SHOOT UP INTO THE LOWER TO MID 80S ONCE AGAIN UNDER SUNNY SKIES ON TUESDAY. 850 MB TEMPS WILL REACH +16C BY LATE IN THE DAY. THERE WILL BE A DEEP MIXING LAYER AND A SOUTHWEST GRADIENT INCREASING WITH TIME. THIS GRADIENT...ALONG WITH INCREASING CLOUDS OVER NORTHERN SECTIONS WILL LIMIT THE INLAND FOG TUESDAY NIGHT. && .LONG TERM /WEDNESDAY THROUGH MONDAY/... A ZONAL FLOW DEVELOPS WEDNESDAY AS THE UPPER RIDGE OVER THE NORTHEAST BECOMES FLATTENED AS A S/WV AND ACCOMPANIED COLD FRONT MOVES THROUGH THE RIDGE. A DOWNSLOPING FLOW AND WARM TEMPS ALOFT EXPECTED WED...TEMPS WILL BECOME VERY MILD AND MAY APPROACH 90 DEGS IN SOME AREAS. A FEW WDLY SCT SHWRS MAY ACCOMPANY THE FRONT. FOR THU AND FRI... A NWLY FLOW ALOFT WILL REDEVELOP LATER AS AN UPPER LOW ONCE AGAIN BECOMES ANCHORED IN THE MARITIMES. THIS WILL MEAN A RETURN TO COOLER TEMPS AND CONDITIONS WILL REMAIN DRY THU AND FRI. BY THE WEEKEND THE PATTERN BECOMES PROGRESSIVE AND A SW FLOW AT THE SURFACE AND ALOFT WILL ALLOW FOR WARMER AND MORE HUMID WEATHER WITH THE RISK OF SOME CONVECTION EACH DAY OVER THE WEEKEND AS A FRONTAL SYSTEM STALLS OVER THE AREA. STAYED COSE TO THE SUPERBLEND MODELLING FOR POPS AND TEMPS. && .AVIATION /18Z MONDAY THROUGH SATURDAY/... .SHORT TERM...VFR TODAY THROUGH TUESDAY...WITH AREAS OF IFR/LIFR CEILINGS AND VSBY IN MORNING VALLEY FOG. .LONG TERM...MAINLY VFR CONDS. && .MARINE... .SHORT TERM... WAVES WILL RUN IN THE 3 TO 4 FOOT RANGE IN SOME AREAS TODAY. HAVE ADJUSTED THE WAVE FORECAST UPWARDS FOR TONIGHT. THERE IS MOSTLY AN 8 SECOND OR HIGHER PERIOD. .LONG TERM... WINDS AND SEAS WILL REMAIN BELOW SCA CRITERIA. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. && $$

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