Area Forecast Discussion
Issued by NWS Burlington, VT
Issued by NWS Burlington, VT
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795 FXUS61 KBTV 232338 AFDBTV Area Forecast Discussion National Weather Service Burlington VT 638 PM EST Sat Nov 23 2024 .SYNOPSIS... A breezy, upslope pattern will continue throughout the weekend, supporting several inches of wet mountain snow through the weekend in the northern Greens and blustery conditions. Additional precipitation will return as mainly rain Monday night into Tuesday, with more uncertain chances towards late week. && .NEAR TERM /THROUGH SUNDAY/... As of 608 PM EST Saturday... Light showers continue across the Northeast Kingdom and westerly upslope areas, whether they are visible on radar or not. A more organized area of precipitation is moving into northern New York from the west associated with a weak shortwave. It will pass through the region tonight and intensify slightly. Snow levels generally range between 1,000 to 2,000 feet, with the lowest levels in the Northeast Kingdom and highest levels in southern Vermont. These will hold relatively steady for a few hours before dropping later tonight behind that shortwave. Decreased the winds a little to reflect observations but they will pick up later tonight with cold air advection behind the shortwave. Previous Discussion...Surface low pressure centered over the Canadian Maritimes will continue to bring unsettled weather to the region this weekend as we remain under cyclonic flow. Throughout the afternoon, precipitation has decreased in areal coverage and has become more terrain focused. A shortwave will pass through the region tonight, reinvigorating shower chances this evening, especially in the favored upslope areas. Temperatures tonight will be seasonable, in the 20s and 30s. The strong pressure gradient will allow for gusty winds to continue throughout the night, especially on Lake Champlain. Tomorrow the region will continue to be under northwest flow and a strong pressure gradient, continuing to bring upslope showers and blustery conditions. Precipitation will largely be limited to the northern Greens tomorrow, with strong westerly flow, so locations like Jay Peak should see several inches of snowfall. Temperatures tomorrow will be on the cool side, with highs in the 30sw to low 40s, but with strong winds it would feel more like 30s, and even the teens across the higher terrain. By Sunday night showers will begin to wind down as a brief period of surface high pressure begins to build into the region. Overnight lows will generally be in the mid to upper 20s, with some cooler spots across the Adirondacks. && .SHORT TERM /SUNDAY NIGHT THROUGH MONDAY/... As of 346 PM EST Saturday...Monday will be characterized by partly cloudy skies increasing to cloudy through the day with high temperatures ranging from the mid/upper 30s (coldest in northeastern Vermont) to low mid 40s(warmest in southern Vermont). Breezes will be light with high pressure cresting and beginning to exit. Overnight, temperatures should cool initially with northeastern Vermont radiating more efficiently due to less cloud cover than the rest of the North Country. This cooling will have implications as a system moves into the Great Lakes region with a frontal boundary pushing into the region. Sub-freezing surface temperatures in the Adirondacks and northeastern Vermont combined with a warming profile aloft will promote a period of freezing rain before profiles warm enough to allow enough sensible heat transfer to warm surface temperatures above freezing. Up to a tenth of an inch of ice is possible overnight, but more could occur in northeastern Vermont should a northerly cold wedge form replenishing cold air. Elsewhere, rain is expected with some snow possible for highest peaks. && .LONG TERM /MONDAY NIGHT THROUGH SATURDAY/... As of 346 PM EST Saturday...The system continues to push through Tuesday with surface temperatures rising to preclude freezing rain. Total QPF looks to range 0.2-0.5", so not as much as recent rainfall, but enough to continue to provide beneficial wetting of soils. A breezy northwesterly flow pattern develops behind the front resulting in cooling late Tuesday and continue upslope precipitation chances. Could see snow levels drop to near Lake Champlain level Tuesday night with a transition to snow for most elevations. QPF will be lower, so accumulating snow chances will be highest for higher elevations with little expected below 1000ft given wet surface conditions. The region is favored to remain under the influence of the upper low with winds promoting some lake enhanced showers off of Lake Ontario Wednesday into Thursday. Most of these showers will stay south of the Adirondacks, but could see some extending eastward into portions of the southern Adirondacks. Elsewhere, the upslope pattern will weaken by Wednesday night as relative high pressure moves through. More certain will be cooler temperatures with highs generally in the 30s and lows in the 20s. The next system is favored to approach towards the end of the week. However, models are split on the surface track lending to uncertainty in the system`s character. Consensus favors a southerly track keeping the North Country on the colder side Friday with potential for snow while some single runs show a westward track with potential for rain, snow, and mixed precipitation. Either way, this system could impact post holiday travel plans. && .AVIATION /00Z SUNDAY THROUGH THURSDAY/... Through 00Z Monday...A mix of MVFR and IFR will prevail across the region over the next 24 hours, along with light rain and snow showers. IFR most likely at KSLK/KMPV/KEFK, mainly due to ceilings, though IFR visibility possible in snow showers at KSLK and possibly KEFK, especially 02z-14z Sun. Other terminals to remain MVFR with ceilings 18-2800 ft, and scattered rain showers overnight. Rain/snow showers gradually taper to an end after 12z Sun, lingering longest at KEFK. Ceilings will gradually lift as well, with MVFR/VFR by 21z at all terminals. North/northwest winds will continue to occasionally gust to 20 kt through 02z, but expect gustiness to become more regular overnight and persist through Sunday morning. LLWS will be possible overnight as well, mainly at KRUT/KMPV/KEFK. Outlook... Sunday Night: VFR. NO SIG WX. Monday: VFR. NO SIG WX. Monday Night: Mainly VFR, with local MVFR possible. Chance SHRA, Chance FZRA. Tuesday: Mainly MVFR, with local VFR possible. Definite SHRA, Definite FZRA. Tuesday Night: MVFR. Chance SHSN, Chance SHRA. Wednesday: Mainly VFR, with areas MVFR possible. Chance SHRA, Chance SHSN. Wednesday Night: Mainly VFR, with local MVFR possible. Slight chance SHSN. Thanksgiving Day: Mainly MVFR, with areas VFR possible. Slight chance SHSN. && .MARINE... Winds on Lake Champlain have calmed down a bit this evening, with gusts generally ranging in the 10-20 KT range. They will pick back up later tonight and into the day tomorrow. Gusts should reach the 25 to 30 KT range. Wind directions will switch from northerly to more northwesterly later tonight. Wave heights will be 2 to 4 feet tomorrow before becoming much smaller tomorrow night. && .BTV WATCHES/WARNINGS/ADVISORIES... VT...None. NY...None. && $$ SYNOPSIS...Kremer NEAR TERM...Kremer/Myskowski SHORT TERM...Boyd LONG TERM...Boyd AVIATION...Hastings/Kremer MARINE...WFO BTV