Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 241557 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 1157 AM EDT THU JUL 24 2014 .SYNOPSIS... A COLD FRONT OFF THE COAST WILL MOVE FURTHER OUT TO SEA THIS AFTERNOON. HIGH PRESSURE WILL BUILD IN FROM THE WEST TONIGHT THEN MOVE OFF THE COAST...STAYING WELL TO OUR SOUTH FRIDAY AND SATURDAY. WET WEATHER IS LIKELY SUNDAY THROUGH MONDAY AS AN UPPER LEVEL TROUGH DROPS INTO THE REGION BRINGING LOW PRESSURE AND A FRONTAL SYSTEM IN FROM THE WEST AND SOUTH. THE TROUGH WILL REMAIN OVER THE EASTERN U.S THROUGH MUCH OF NEXT WEEK KEEPING UNSETTLED WEATHER ACROSS THE AREA. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... WILL UPDATE TO ADD SLGT CHC -SHRA ALONG THE COAST AND EXTREME SE NH AS LATEST RADAR LOOP SHOWING ISOLD -SHRA ACROSS SOME OF THESE AREAS. MORE SHRA CONT ACROSS THE MID COAST REGION AT THIS TIME. STILL TREND WILL BE FOR IMPROVING WX THIS AFTERNOON. ANY OTHER CHANGES JUST MINOR TWEAKS BASED ON LATEST OBSERVED DATA. CLEARING OR AT LEAST PARTIAL CLEARING CONTINUES TO BUILD IN FROM THE NW TODAY AS THE SFC LOW AND FNT MOVE FURTHER OUT TO SEA. COOLER AND LESS HUMID WX MOVE IN TODAY AS N NW WINDS SET UP. WINDS DROP OFF SO THAT A SEA BREEZE MAY FORM ALONG THE IMMEDIATE COAST THIS AFTERNOON WHICH MAY IMPACT SOME COASTAL COMMUNITIES. EXPECT HIGHS TO TOP OUT IN THE 70S...THOUGH A FEW SPOTS IN THE S MAY REACH 80. UPDATED SUMMITS FCST TO LOWER TEMPS FOR THE HIGHEST SUMMITS AND ADJUST SKY COVER A BIT PER LATEST SATELLITE AND SFC REPORTS. UPDATED SURF FCST TO REMOVE ANY CHC OF TSTMS THIS MORNING. ALSO ADJUSTED CHC OF PRCP PER RADAR AND SKY COVER PER SATELLITE AND SFC OBS. WITH CLEARING TO BE SLOW ALONG THE COAST...ESPECIALLY THE MID COAST HAVE LOWERED THE UV INDEX E OF PWM FOR TODAY. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/... HIGH PRES CONTINUES TO NOSE INTO THE REGION TONIGHT. CLEAR SKIES AND WINDS BECOMING LIGHT AND VARIABLE WILL PROMOTE QUICK COOLING AFTER SUNSET. RECENT RNFL AND COOL TEMPS SHOULD LEAD TO A ROUND OF VALLEY FOG. HIGH PRES REMAINS IN CONTROL FRI...WITH TEMPS MODERATING UPWARDS A FEW DEGREES. && .LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/... FAIR WEATHER IS EXPECTED FRIDAY NIGHT AND SATURDAY AS A RIDGE OF HIGH PRESSURE MOVES OFF THE COAST. RETURN FLOW ON THE BACK SIDE OF THE HIGH WILL BRING WARMER TEMPERATURES AND HIGHER HUMIDITY LEVELS FOR THE DAY SATURDAY AND INTO SUNDAY. THE APPROACHING UPPER LEVEL TROUGH WILL BRING AN INCREASING THREAT OF SHOWERS AND THUNDERSTORMS DURING THE DAY SUNDAY...SUNDAY NIGHT...AND MONDAY AS SURFACE LOW PRESSURE MOVES NORTHEAST ALONG AN APPROACHING FRONTAL BOUNDARY. GREATEST CHANCES OF THUNDERSTORMS WILL BE DURING THE AFTERNOON HOURS. UPPER TROUGH REMAINS DRAPED ACROSS THE EASTERN U.S. FOR MUCH OF NEXT WEEK KEEPING THE COOL AND UNSETTLED WEATHER PATTERN IN PLACE && .AVIATION /16Z THURSDAY THROUGH MONDAY/... SHORT TERM /THROUGH FRIDAY/...VSBY UNRESTRICTED AT THIS TIME AND CIGS CONTINUE TO IMPROVE AROUND NOON TIME THOUGH STILL SOME LOWER CLOUDS AROUND AND EVEN ISOLD -SHRA ALONG/NEAR THE COAST WITH SCT -SHRA AROUND THE MID COAST OF ME. TREND WILL BE FOR CIG TO BECOME VFR THIS AFTERNOON. EXPECT VFR CONDITIONS TO PREVAIL TNGT THRU FRIDAY. EXCEPTION FOR TONIGHT...WHERE HIGH PRES BUILDING IN WITH CLEARING SKIES AND LGT WINDS THAT MAY PROMOTE VALLEY FOG WITH COOL TEMPS AND RECENT PRCP. LONG TERM...VFR CONDITIONS EXPECTED FRIDAY NIGHT THROUGH SUNDAY MORNING WITH SOME IFR CONDITIONS POSSIBLE IN VALLEY FOG EARLY SATURDAY AND SUNDAY MORNINGS. OCCASIONAL MVFR CONDITIONS EXPECTED SUNDAY THROUGH MONDAY IN SHOWERS AND THUNDERSTORMS WITH IFR CONDITIONS POSSIBLE IN DAYTIME THUNDERSTORMS AND OVERNIGHT PATCHY FOG. && .MARINE... SHORT TERM /TODAY THROUGH FRIDAY/...WILL UPDATE TO INPUT LATEST OBSERVED DATA RESULTING IN ONLY A FEW TWEAKS TO THE PREVIOUS FCST. SOME GUSTS CLOSE TO 25 KT POSSIBLE OVER THE OPEN WATERS BUT NOT FREQUENT ENOUGH FOR AN SCA. WINDS SHOULD DROP OFF THIS AFTERNOON. WINDS AND SEAS WILL REMAIN BELOW SCA LEVELS THRU FRIDAY WITH HIGH PRES BUILDING TO OUR S. LONG TERM...SHOWERS AND THUNDERSTORMS EXPECTED SUNDAY THROUGH MONDAY...THEN A CHANCE OF SHOWERS OR THUNDERSTORMS THROUGH MID WEEK. WINDS EXPECTED TO REMAIN BELOW SCA CRITERIA...HOWEVER BUILDING SEAS SATURDAY NIGHT AND SUNDAY MAY REACH 4 TO 6 FEET. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. && $$

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