Area Forecast Discussion
Issued by NWS Burlington, VT

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319 FXUS61 KBTV 261817 AFDBTV Area Forecast Discussion National Weather Service Burlington VT 217 PM EDT Sun Mar 26 2017 .SYNOPSIS...
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High pressure over the North Country will give way to unsettled and warmer weather for tonight and Monday as developing low pressure over the central U.S. pushes a warm front northward through the region. Periods of freezing rain tonight into Monday will transition to all rain by Monday afternoon, briefly tapering off Monday night before returning for Tuesday and ending as snow Tuesday night.
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&& .NEAR TERM /THROUGH MONDAY/... As of 1114 AM EDT Sunday...No significant changes for this mid morning update. Precipitation still not very impressive moving across central New York. Previous discussion follows. Freezing Rain Advisory in effect for portions of the North Country Tonight... A relatively quiet day is on tap for the North Country to end the weekend as high pressure centered over eastern Quebec continues to provide mainly sunny and dry conditions to the region. We`ll see some increasing mid/high clouds through the day with chances for precipitation increasing from the southwest beyond the 4PM hour and heading into this evening. Highs will run slightly below normal for late March in the mid/upper 30s to around 40 in the Champlain Valley. For tonight into Monday, concerns remain from the previous forecast thinking in regards to freezing rain potential as deep low pressure north of the Ozarks this morning will push a warm front from southwest to northeast into the forecast area tonight. Thermal profiles are as such that freezing rain will be the dominant ptype across Essex County of New York and from the western slopes of the Green Mountains eastward where surface temps will hover a freezing or just below as warmer air aloft moves over the area. In the deeper Champlain and St. Lawrence Valleys surface temps remain in the low/mid 30s overnight so while pockets of freezing rain are certainly possible, the overall impacts will be minimal. On the impact side of things, under the advisory area, there is some concern that impacts will be on the low side through much of the event as modeled road temperatures show surfaces warming well above freezing during the day, and only right to freezing during the overnight. The expected ice accumulations won`t have an impact on powerlines as only up to a tenth of an inch is expected at the lower elevations, and even though higher up on the mid-slopes increased amounts could accumulate onto the larger transmission lines, they can usually handle a little more without failing. Freezing rain will be falling during the Monday morning commute though so any ice on area roadways will be a concern. By mid-day Monday the warm front pushes closer to the Canadian border allowing surface temps to warm into the mid-30s east to upper 40s west transitioning ptype to plain rain and ending the threat of ice accumulation. && .SHORT TERM /MONDAY NIGHT THROUGH TUESDAY/... As of 356 AM EDT Sunday....Shortwave trough moves out of the area Monday night and with best dynamic forcing now east of us...areal coverage of precipitation should decrease rapidly. Some lingering showers near the Canadian Border through the first part of the night will exist and that should be about it. Next shortwave trough moves into the region Tuesday afternoon and once again widespread precipitation should develop over northern New York and Vermont. High temperatures on Tuesday will be in the mid 40s to lower 50s...thus expecting precipitation to fall in the form of rain. && .LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/... As of 356 AM EDT Sunday...Rain will decrease in areal coverage from west to east Tuesday night as shortwave trough moves east of the area. Colder air will begin to filter in and any lingering precipitation will turn to snow showers. Northwest flow aloft develops on the backside of the trough Wednesday and Wednesday night and looking for some mountains snow showers in this pattern. Drier air begins to move in Thursday and Friday for no precipitation. Unfortunately data all over the place heading into the weekend with timing of systems and have kept in the chance for showers Friday night into Saturday. Highs on Wednesday and Thursday will be in the upper 30s to mid 40s...then in the 40s for Friday and Saturday. && .AVIATION /18Z SUNDAY THROUGH FRIDAY/...
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Through 18Z Monday...Mainly VFR conditions expected through 00Z Monday, as a ridge of high pressure moves off the New England coast by 00Z Monday. Composite radar loop at 18Z Sunday showing some weak returns over the region, but surface observations showing most of this activity not reaching the surface at this time due to the lower portion of the atmosphere being fairly dry at this time. A warm front will approach the region later tonight with areas of light rain developing, with areas of freezing rain east of the Green Mountains, especially at KMPV. Expecting conditions to lower to MVFR/IFR between 03Z-07Z Monday and continuing through 18Z Monday. Expecting any freezing rain across the region to change to plain rain by 15Z Monday. Outlook 18Z Monday through Friday... 18Z Monday through 00Z Tuesday...Rain with cigs/vsby variable from IFR to MVFR. 00Z Tuesday through 00Z Thursday...MVFR/IFR in scattered rain showers Monday night, becoming prevailing rain Tuesday, and rain/snow Tuesday night and Wednesday. Moderately gusty NW winds likely Wednesday. 00Z Thursday through 00Z Saturday...Mainly VFR, except for some scattered snow showers over the Adirondacks and Green Mountains, mainly 00Z Thursday until 00Z Friday.
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&& .BTV WATCHES/WARNINGS/ADVISORIES... VT...Freezing Rain Advisory from 7 PM this evening to 11 AM EDT Monday for VTZ003-004-006>008-010-012-016>019. NY...Freezing Rain Advisory from 7 PM this evening to 11 AM EDT Monday for NYZ034. && $$ SYNOPSIS...Lahiff NEAR TERM...Lahiff SHORT TERM...Evenson LONG TERM...Evenson AVIATION...WGH

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