Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 271032 AFDGYX Area Forecast Discussion National Weather Service Gray ME 632 AM EDT Sun May 27 2018 .SYNOPSIS... Cool high pressure will build in from the northeast today and will hold over the region into Monday with plenty of clouds expected. High pressure will shift east late Monday and Monday night as a weak warm front approaches from the west. A cold front will drop south through the region by Tuesday morning. High pressure will build over the region Tuesday and will push offshore south of New England Wednesday. Low pressure may bring appreciable rainfall to the region Friday into the weekend. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... 630 am...Pops lowered below 10% thru a good chunk of the morning across all of the CWA, as front has pushed to the S and W of the CWA, and there is little in the way of forcing. That wave passing to our south later today could push showers into southern zones this afternoon. Otherwise, the cool and cloudy day is expected as advertised. Previously...Looks like sfc cold front has made thru all but Cheshire county as of 07Z, but should move thru there very shortly. The rain showers across srn NH, should start to diminish as they continue to slowly shift S and E thru the early morning. While the threat for showers across the srn tier of NH counties will be around thru today, it will be minimal thru most of the day, increasing only late in the day. Most of the CWA should stay cloudy thru the day as the onshore flow takes hold, but should stay dry, as airmass above the marine inversion remains very dry. The exception will be the NE zones, which will see partly sunny conds, especially into early to mid afternoon. Temps in the NE will be the warmest with highs in the low to mid 60s, although thanks to downsloping on the easterly flow, spots int the CT vly could be this warm as well, with some breaks of sun possible here, too. Otherwise highs will be in the mid to upper 50s, which is pretty much where temps are now. May see some showers move into SW coastal ME late today as a weak sfc low passes to our south. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM MONDAY/... As the sfc low to our south shifts east, the flow will diminish and the well-mixed inversion will drop and become more stable. So, could see some DZ overnight on the coastal plain and into the foothills. Will likely see some patchy fog as well, as Tds start to rise, and temps fall off into the 40s. Monday will see some slight improvement, especially in the afternoon, once the fog and drizzle diminish during the morning. The weak gradient flow becomes more SW, which could allow some warmer air in away from the coast, as well as some breaks of sun. On the coast, any SW flow will be too weak to shift the flow offshore, and clouds and cool temps will linger thru the day. Highs will be warmer, ranging from around 60 on the coast to 70-75 inland. && .LONG TERM /MONDAY NIGHT THROUGH SATURDAY/... A cold front will cross the region Monday night with the chance of showers mainly across northern and central zones. Canadian high pres then builds southeast into the region Tuesday through Thursday with warming temperatures expected. Thereafter, models indicating the remnants of Alberto move into the Ohio valley and then possibly into the northeast toward the weekend. Some much needed rainfall is possible Friday and into the weekend. && .AVIATION /12Z SUNDAY THROUGH THURSDAY/... Short Term...DEspite onshore flow will see VFR cigs for the most part today. This will change as all but KHIE, and maybe KLEB, degrade to IFR or lower tonight in low cigs, fog, and some DZ near the coast. IFR likely to linger into part of Monday morning, with improvement to VFR inland terminals during the afternoon. Long Term...Scattered MVFR conditions in the mountains and foothills Mon night with a FROPA otherwise VFR through Thu. && .MARINE... Short Term...Have extended the SCA thru today. At some during the afternoon the winds will fall below SCA criteria, but seas will remain up thru tonight, so SCA will transitions to haz seas for the overnight. Long Term...No flags. && .FIRE WEATHER... Moist onshore flow will continue into Monday. The rest of the week looks warm, with light winds, and moderate humidity. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...None. NH...None. MARINE...Small Craft Advisory until 6 PM EDT this evening for ANZ150- 152-154. && $$ SYNOPSIS... NEAR TERM...Cempa SHORT TERM... LONG TERM... AVIATION... MARINE... FIRE WEATHER...

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