Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 251921 AFDGYX Area Forecast Discussion National Weather Service Gray ME 321 PM EDT Fri May 25 2018 .SYNOPSIS...
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A cold front will slowly drop south through the region tonight through Saturday and will stall south of New England Saturday night. High pressure will build in from the northeast on Sunday and will hold over the region Sunday night. High pressure will shift east on Monday as a weak warm front approaches from the west. A cold front will drop south through the region Monday night. High pressure will build over the region Tuesday and will push offshore south of New England Wednesday.
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&& .NEAR TERM /THROUGH TONIGHT/...
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Back door cold front currently situated across far northern Maine will slowly work its way southwest into northern zones overnight. This boundary will be the focus for occasional showers (maybe a rumble of thunder far north) first pushing into northeast zones this evening and then into central and eastern zones after midnight. Expect QPF to be on the light side...generally less than a quarter inch. The remainder of the area will see increasing clouds overnight. Lows will range from the mid 50s north to the mid 60s south.
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&& .SHORT TERM /SATURDAY THROUGH SATURDAY NIGHT/...
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Cold front will continue to push south on Saturday gradually shifting into southern New England by evening. Although clouds may limit heating ahead of the front in southern New Hampshire and southwest Maine...expect enough instability to develop during the morning hours to pop off scattered convection in the afternoon. With freezing levels on the high side and marginal shear not looking for severe storms but healthy PWAT`s approaching 1.5 inches will contribute to heavy downpours. High temperatures will range through 70s across western Maine and northern New Hampshire. Southern New Hampshire will range through the 80s. Showers and Thunderstorms will gradually push south of the region Saturday evening and high pressure will build in from the northeast after midnight. Increasing onshore flow will bring ocean stratus into southern New Hampshire and southwest Maine overnight and areas of fog will be likely as well. Low temperatures will range through the 40s in northeast zones and lower to mid 50s in the cloudier southwest.
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&& .LONG TERM /SUNDAY THROUGH FRIDAY/...
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Forecast area will be situated north of a backdoor cold front Sunday and Monday. While we are not expecting widespread rain to wash things out, it does look cloud and much cooler than normal both days. There could also be fog, especially at the coast. Chances for showers increase across southern zones - they`ll be closer to the frontal forcing. Overall, not the best way to end the holiday weekend, but it could be worse. The low level maritime air mass should be displaced by a cold front Monday night allowing for much better weather for Tuesday - including highs back into the 70s to 80s again. Fair weather continues Wednesday and Thursday with high pressure in control. Low pressure, possibly what`s leftover from Alberto in the Gulf of Mexico could visit our region and bring some rain late in the week.
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&& .AVIATION /19Z FRIDAY THROUGH WEDNESDAY/...
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Short Term...VFR tonight. VFR with areas of MVFR/IFR ceilings and vsby in showers and thunderstorms Saturday. IFR/LIFR ceilings and vsby developing in southern New Hampshire and southwest Maine Saturday night. Long Term...MVFR to local IFR cigs on the coast and perhaps across southern NH Sunday into Monday (especially at night) with onshore flow. VFR returns later Monday night through Wednesday.
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&& .MARINE...
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Short Term...Continuing SCA`s through 800 pm. SCA`s may be needed again late Saturday night. Long Term...SCA possible Sunday and Sunday night for the ocean waters and possibly briefly in the bays.
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&& .FIRE WEATHER...
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Back door cold front will bring showers into the region overnight with showers and some thunderstorms continuing on Saturday. Moist onshore flow will set up behind the front for Saturday night and Sunday. No fire weather issues are anticipated through the period.
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&& .GYX WATCHES/WARNINGS/ADVISORIES... ME...None. NH...None. MARINE...Small Craft Advisory until 8 PM EDT this evening for ANZ150>152-154. && $$

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