Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 231910 AFDGYX Area Forecast Discussion National Weather Service Gray ME 310 PM EDT Tue Jul 23 2019 .SYNOPSIS... Low pressure will shift into the maritimes by this evening. Another area of low pressure will track east along the boundary south of New England tonight. High pressure will build in from the west on Wednesday and Wednesday night. A weak frontal boundary will wash out as it sags into northern zones on Thursday. High pressure will build south of New England Thursday night through Saturday and will hold off the coast on Sunday. && .NEAR TERM /UNTIL 8 PM THIS EVENING/... Precipitation will continue to exit into the Canadian Maritimes this evening. This will allow for a gradual clearing over southern areas. Across the north, a weak weather disturbance may bring a brief shower to the mountains this evening as they head east out of Canada and weaken with time. It will be a much cooler night then we have seen recently with lows primarily in the 50s. These temperatures will approach their dew points in the north and west, allowing for patchy fog to develop. Across the south, some cloudiness will linger as yet another area of low pressure passes by east of our region. There will be a slight chance for a shower but this will be confined to the coastal waters. && .SHORT TERM /8 PM THIS EVENING THROUGH WEDNESDAY NIGHT/... Clouds will exit the coastline on Wednesday as the surface low tracks north and east well off the New England and Mid Atlantic coastline. Partly to mostly sunny conditions will allow for temperatures to climb through the 70s during the day. Patchy fog may redevelop Wednesday night in some areas. This fog potential will be very dependent on whether clouds advect into the region from the west late at night in association with an approaching short wave trough. && .LONG TERM /THURSDAY THROUGH TUESDAY/... Weak cold front drifts through northwest zones Thursday morning but with weak forcing shower and thunderstorm activity looks to be isolated and mainly over western areas. The rest of the region looks to remain partly sunny with high temperatures from mid to upper 70s. High pressure then moves into the region Friday from the southwest bringing with it warm southwesterly flow through the weekend. Temperatures will cool down Thursday night under mostly clear skies into the 50s before quickly rebounding Friday into the low to mid 80s. A slightly warmer and more humid airmass will move into the region Friday night through Saturday with an area of high pressure moving off the coast. Low temperatures Friday night will remain in the 60s and highs on Saturday will be in the mid to upper 80s under mostly sunny skies. Saturday night looks to remain quiet under partly cloudy skies with low temperatures mainly in the 60s. A weak pulse of energy on Sunday combined with radiational heating may spark a few showers Sunday afternoon across mainly northwestern zones. Monday and Tuesday will return to mostly sunny skies with temperatures in the 80s. && .AVIATION /19Z TUESDAY THROUGH SUNDAY/... Short Term...Ceilings will continue to improve this evening as low pressure exits off the coast. Localized IFR and LIFR conditions over northern areas and the Connecticut River Valley in overnight fog. Fog lifts early Wednesday morning only to redevelop late Wednesday night. Long Term...VFR conditions will continue through the weekend as high pressure dominates the pattern. && .MARINE... Short Term...Winds and seas will remain below SCA levels through the short term portion of the forecast (through Wednesday night). Long Term... High pressure will build in for the end of the week and into the weekend keeping winds and seas calm. && .EQUIPMENT...The Sugarloaf NWR transmitter is off the air until further notice. This will be an extended outage as the tower, which was severely damaged in a winter storm, is rebuilt. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...None. NH...None. MARINE...None. && $$ is the U.S. government's official web portal to all federal, state and local government web resources and services.