Area Forecast Discussion
Issued by NWS Portland, ME

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429 FXUS61 KGYX 161501 AAA AFDGYX Area Forecast Discussion...UPDATED National Weather Service Gray ME 1001 AM EST Thu Feb 16 2017 .SYNOPSIS... Low pressure will pull away today leaving behind upslope snow showers in the mountains after snow ends this morning elsewhere. High pressure will build into the region on Friday as the storm departs to the maritimes. A few upslope snow showers will linger in the mountains through Saturday but elsewhere skies will be mainly sunny. Temperatures will warm through the weekend reaching the mid 40s by Sunday. && .NEAR TERM /UNTIL 6 PM THIS EVENING/...
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Update...I have allowed the warnings/advisories to expire for all but Nrn NH. Low level moisture will linger in cyclonic flow behind the departing low pressure...allowing bands of snow to rotate thru the area today. Eventually we will transition to terrain forced snow showers...where an additional several inches is possible today. Previous Discussion: Inverted (NORLUN) trof axis extends across western Maine and into eastern NH. A well defined area of steady snow continues across the this axis early this morning and will slowly dissipate by later this morning. Have continued the winter storm warnings in areas along this axis while further north and east have dropped the warnings where little support remains for any significant accumulations. Some upslope snow showers will continue today across northern NH so have continued winter storm warnings those areas as well. Over southwest NH some light snow continues with some light accumulations possible over the next few hours so have continue the winter weather advisories over those areas. By afternoon expect the snows to come to an end over all areas with only leftover upslope snow showers in the mountains as a broad northwest flow aloft and at the surface develops. Downsloping areas in the afternoon should see some clearing. Use a blend of models for max temps which should not warm that much during the day due to cold air advection.
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&& .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/... A drier and colder northwest flow expected tonight through Friday. Gusty northwest winds can be expected. Mostly sunny conditions on Friday can be expected except in the mountains where some upsloping clouds and a few isolated snow showers will linger. && .LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/... Much quieter weather is expected in the extended period of the forecast along with warmer temperatures. The temperatures should peak on Sunday with high perhaps around 50 in a few locations. There is little to no signal in the deterministic and ensemble guidance at this point to suggest any major precipitation systems are in the offing. && .AVIATION /15Z THURSDAY THROUGH MONDAY/... Short Term...MVFR to IFR conditions in areas of snow this morning will gradually improve to VFR by afternoon. In the mountains MVFR conditions will continue in scattered snow showers. VFR conditions are expected tonight and Friday except locally MVFR in any scattered mountain snow showers. Long Term... VFR will prevail from Friday night right through the weekend except in the mountains where HIE will see periods of MVFR in SHSN. && .MARINE... Short Term...Gusty northwest winds in the wake of the exiting coastal low will continue through the day. Northwest winds will remain gusty tonight into Friday and probably will remain in SCA range. In the bays SCA conditions are expected today so SCA`s are in effect. Tonight and Friday SCA conditions are possible and SCA` may need to be extended. Long Term... Very quiet period on the waters with high pressure built overhead. Expect conditions to remain below SCA right through the start of next week. && .GYX WATCHES/WARNINGS/ADVISORIES...
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ME...None. NH...Winter Storm Warning until 7 PM EST this evening for NHZ001>003. MARINE...Small Craft Advisory until 7 PM EST this evening for ANZ151- 153. Gale Warning until 7 PM EST this evening for ANZ150-152-154.
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&& $$ NEAR TERM...Legro

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