Area Forecast Discussion
Issued by NWS Burlington, VT

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006 FXUS61 KBTV 210713 AFDBTV Area Forecast Discussion National Weather Service Burlington VT 313 AM EDT Sat Sep 21 2024 .SYNOPSIS...
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Outside an isolated shower to two near the Adirondacks, dry weather is expected today with partly cloudy skies and temperatures in the 70s. Our dry pattern continues, but with more seasonable temperatures of 60s to lower 70s during the day and lower 40s to lower 50s at night. Chances for rain will increase Monday evening into Tuesday as a weak low pressure moves towards Lake Ontario with additional chances midweek when that low pressure is replaced by another.
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&& .NEAR TERM /THROUGH SUNDAY/...
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As of 309 AM EDT Saturday...A few sprinkles are possible in the Adirondacks today as a weak trough lingers in northern New York. Otherwise, quiet weather with patchwork cloud cover will typify the day. Highs will reach the 70s. It will be a real nice Saturday all in all! For tonight, cool conditions in the mid 40s to mid 50s are expected with more valley fog possible. Though it may not be as prevalent in eastern Vermont with mid to high clouds. A few models are trying to spit precipitation out across the Connecticut River Valley towards dawn on Sunday. However, the lower levels of the atmosphere appear quite dry, and largely think this will be virga. During the day on Sunday, high pressure will build south, extending into our area, with dry and cooler weather ranging from the upper 60s to mid 70s.
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&& .SHORT TERM /SUNDAY NIGHT THROUGH MONDAY NIGHT/...
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As of 309 AM EDT Saturday...We will finish up the weekend dry as we remain under the influence of upper level ridging and surface high pressure. However, rain chances will gradually increase from the west as an upper level trough over the Great Lakes shifts eastward toward Quebec. This feature will be proceeded by a weak disturbance approaching ahead of the main upper low. This may be enough to spark a few showers on Monday, mainly in northern NY as moisture will become more limited as one heads into VT. Some of this shower activity could make it into VT overnight Monday night, but chances remain low at this time given lack of model agreement on eastward extent of precipitation. Monday`s daytime highs will be seasonable though a few degrees cooler than on Sunday, generally topping out in the mid 60s to low 70s. Lows both Sunday and Monday nights will be quite similar, with the St Lawrence and Champlain Valley remaining in the 50s while the higher terrain and much of the rest of VT will get down into the 40s.
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&& .LONG TERM /TUESDAY THROUGH FRIDAY/...
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As of 309 AM EDT Saturday...Shower chances will increase as we head into the middle of next week. WHile model consensus shows best shower chances will be Tuesday into Wednesday as the low pressure to our west pushes a frontal boundary across our region, there remains considerable uncertainty as to exactly how the synoptic setup will evolve with a large upper low potentially cutting off somewhere over northern New England/Canadian Maritimes while a southern stream system remains somewhere over the ArkLaTex or mid-Mississippi Valley regions. So just about every period has at least a slight chance or low chance of showers through the end of the week. Temperatures will be cooler but seasonable, with highs in the 60s to around 70F and lows in the 40s and 50s.
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&& .AVIATION /07Z SATURDAY THROUGH WEDNESDAY/... Through 06Z Sunday...Conditions are a mix of MVFR and VFR as some stratus around 2000-2800 ft agl are lingering near mountainous terrain, and some patchy fog at KSLK. There is some gradient flow keeping fog at bay for now, but this should lighten up, and we should see fog become more dominant at favored locations like KSLK and KMPV about 08z to 09z. Clouds will linger at KEFK and in and out near KMSS, which should limit fog compared to the last several nights, but did TEMPO some 4SM BR for a few hours based on little overall change to the current weather pattern. Beyond 12-13z, fog will diminish with mainly VFR conditions throughout the day. Clouds today will generally remain at or above 5000 ft agl. Winds will be south to southeast around 4 to 8 knots, except northeast at KMSS, through about 00z and then trend light and variable. Outlook... Sunday: VFR. NO SIG WX. Sunday Night: VFR. NO SIG WX. Monday: VFR. NO SIG WX. Monday Night: Mainly VFR, with local MVFR possible. Chance SHRA. Tuesday: Mainly VFR, with local MVFR possible. Slight chance SHRA. Tuesday Night: Mainly VFR, with areas MVFR possible. Chance SHRA. Wednesday: Mainly MVFR, with local VFR possible. Chance SHRA. && .BTV WATCHES/WARNINGS/ADVISORIES... VT...None. NY...None. && $$ SYNOPSIS...Haynes NEAR TERM...Haynes SHORT TERM...Hastings LONG TERM...Hastings AVIATION...Haynes