Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 241846 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 246 PM EDT SUN AUG 24 2014 .SYNOPSIS... HIGH PRESSURE WILL HOLD OVER NEW ENGLAND MONDAY THROUGH TUESDAY. A COLD FRONT WILL DROP SOUTH THROUGH THE REGION ON WEDNESDAY. HIGH PRESSURE WILL BEGIN TO BUILD TOWARDS THE REGION THURSDAY...BEFORE REMAINING OVER NEW ENGLAND FRIDAY AND SATURDAY. A SLOW MOVING FRONT WILL APPROACH FROM THE WEST SUNDAY. && .NEAR TERM /TONIGHT/... NOT MUCH TO SPEAK ABOUT IN THE SHORT TERM...WITH A NEARLY PERFECT DAY IN PROGRESS. AFTER SUNSET CLEAR SKIES AND LIGHT WINDS WILL PROMOTE A QUICK DROP IN TEMPS. INCREASING MOISTURE WITHIN THE BOUNDARY LAYER WILL KEEP MIN TEMPS A FEW DEGREES WARMER THAN LAST NIGHT HOWEVER. SFC RIDGE AXIS MOVES CLOSER...AND THUS EXPECT ANOTHER ROUND OF VALLEY FOG OVERNIGHT. AFTER MIDNIGHT IT WILL BE LOCALLY DENSE IN THE LARGER RIVER VALLEYS. && .SHORT TERM /MONDAY AND MONDAY NIGHT/... ON MON H8 TEMPS CLIMB TO AROUND 15 C ACROSS THE AREA. FORECAST SOUNDINGS INDICATE MIXING CLOSE TO THIS LEVEL DURING THE AFTERNOON...WHICH SUPPORTS HIGH TEMPS IN THE MID 80S ACROSS THE INTERIOR...AND LOW 80S IN THE NORTH COUNTRY. SEA BREEZES SHOULD DEVELOP ALONG THE COAST AND CAP WARMTH SOMEWHAT HOWEVER. HIGH PRES REMAINS IN CONTROL MON NIGHT...WITH MORE CLEAR SKIES AND LIGHT WINDS. MORE VALLEY FOG WILL BE POSSIBLE UNDER THESE CONDITIONS. && .LONG TERM /TUESDAY THROUGH SUNDAY/... A GRADUAL INCREASE IN WARMTH AND HUMIDITY WILL CONTINUE ON TUESDAY TO BEGIN THE LONG RANGE PORTION OF THE FORECAST. IT WILL CONTINUE TO BE A LITTLE COOLER ALONG THE COAST DUE TO AN ONSHORE WIND...WITH 70S AS WELL IN THE MOUNTAINS. BY WEDNESDAY...ALL MODELS WITHIN THE 12Z MODEL SUITE ARE NOW IN GOOD AGREEMENT WITH THE TIMING OF THE APPROACHING COLD FRONT WEDNESDAY INTO WEDNESDAY EVENING. SCATTERED SHOWERS WILL DEVELOP WITH THIS SYSTEM...WITH ISOLATED CONVECTION DURING THE AFTERNOON AND EARLY EVENING HOURS. ON THURSDAY...THE UPPER LEVEL IMPULSE WILL TRIGGER A COUPLE SHOWERS OVER THE UPSLOPE FACING HIGHER TERRAIN OF THE MOUNTAINS. ELSEWHERE IT WILL REMAIN DRY...BUT IT WILL ALSO FEEL QUITE A BIT COOLER THAN THE EARLIER PORTION OF THE WEEK. HIGH PRESSURE WILL CONTINUE TO BRING DRY CONDITIONS TO THE REGION INTO NEXT WEEKEND...ALONG WITH COOLER...BELOW NORMAL TEMPERATURES. && .AVIATION /19Z SUNDAY THROUGH FRIDAY/... SHORT TERM...DIURNAL CU WITH BASES AROUND 5 KFT WILL DISSIPATE QUICKLY AFTER SUNSET. EXPECT ANOTHER ROUND OF FOG WILL SFC RIDGE AXIS MOVING CLOSE TO THE HUDSON VALLEY. EXPECT LOCALLY DENSE FOR IN THE LARGER RIVER VALLEYS ONCE AGAIN...WITH LIFR CIGS/VSBYS MOST LIKELY AT KLEB AND KHIE. FOG WILL LIFT AROUND 12Z...EXCEPT FOR KLEB WHICH MAY LINGER UNTIL NEAR 14Z. DIURNAL CU POSSIBLE AGAIN MON...BUT NO FLIGHT RESTRICTIONS ARE EXPECTED. SEA BREEZES ARE EXPECTED TO DEVELOP AT KPWM...KPSM...AND KRKD. ANOTHER CLEAR NIGHT SHOULD PROMOTE MORE VALLEY FOG MON NIGHT. LONG TERM...VFR EXCEPT AREAS OF IFR CONDITIONS DEVELOPING IN SHOWERS AND ISOLATED THUNDERSTORMS WITH A FRONTAL PASSAGE WEDNESDAY AND WEDNESDAY NIGHT. && .MARINE... .SHORT TERM...WINDS AND SEAS WILL REMAIN BELOW SCA THRESHOLDS. .LONG TERM...A FEW LONG PERIOD SWELLS WILL BE EXPECTED LATE IN THE WEEK...BUT THESE WILL BE MINOR. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. && $$ LEGRO/JC

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