Area Forecast Discussion
Issued by NWS Burlington, VT

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275 FXUS61 KBTV 090649 AFDBTV Area Forecast Discussion National Weather Service Burlington VT 249 AM EDT Wed Jul 9 2025 .SYNOPSIS...
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High pressure just north of the region will provide mainly quiet weather through tonight though some isolated showers are possible. More numerous showers and thunderstorms are likely on Thursday, while more limited shower chances are expected for Friday and especially Saturday followed by another round of organized showers and thunderstorms Sunday into Monday. Temperatures will largely be seasonably warm to hot through the period.
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&& .NEAR TERM /THROUGH TONIGHT/...
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As of 249 AM EDT Wednesday...Seasonable weather is expected across the North Country and Vermont today as weak high pressure centered north of the region remains largely in control. After overnight low clouds and fog scour out by midday, some high clouds will filter in, so only partial sunshine is expected. Some weak shortwave energy ejecting northeastward from a trough over the midwest may provide enough upper level support to develop some isolated terrain driven showers, but the overall probability for precipitation today is low. Temps will be about 5 degrees warmer than yesterday pushing in the upper 70s to low 80s, and with dewpoints holding in the low/mid 60s it will feel slightly muggy like a normal summer day. Some additional isolated showers remain possible tonight as well with little overall airmass change as the trough approaches the region. Skies should remain partly to mostly cloudy offering a warmer and muggier night with lows ranging through the 60s.
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&& .SHORT TERM /THURSDAY THROUGH FRIDAY/...
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As of 249 AM EDT Wednesday...The forecast remains on track for some showers and thunderstorms to develop Thursday as the aforementioned trough glances the region as it lifts northeast through Quebec. Soundings continue to show sufficient CAPE upwards of 1000 J/kg and 30kts of 0-6km bulk shear developing from noon through the afternoon, but overall models show limited upper level height falls and a fairly weak cold pool aloft supporting more of the garden variety of thunderstorms and a low threat of severe storms. Areal coverage of the convection remains very much in question with little consensus amongst the CAMs, but the SPC has placed our region in a Marginal Risk for severe storms so it`s something to keep an eye on. The most likely threat right now would be localized pockets of heavy rain as low level wind fields remain weak with PWATS upwards of 1.5" and warm cloud depths around 10kft. Current 1-hour flash flood guidance is as low as 1.5" in some areas, but overall around 2" for the region, and with a dry day today that will likely rise a little bit for Thursday. Any convection on Thursday will wane into Thursday night with the loss of diurnal heating with mainly dry conditions returning for Friday as an upper level ridge approaches. A warming trends continues into Friday with widespread low/mid 80s expected.
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&& .LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
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As of 249 AM EDT Wednesday...Generally a low-impact but unsettled weather pattern in the long- term is expected. Above average heat from a short ridge Saturday into Sunday will help to drive heat index values towards heat advisory criteria. Probabilities of exceeding heat advisory conditions of 95 or higher will peak on Sunday with the approach of a large scale frontal passage. Shower and thunderstorm chances in the long term will be most likely Sunday afternoon with only a marginal change in air mass behind the boundary. As a result, seasonable heat and humidity looks to persist into early next week.
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&& .AVIATION /07Z WEDNESDAY THROUGH SUNDAY/...
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Through 06Z Wednesday...Low clouds and fog have set in across majority of the area terminals. Sites that will see prevailing fog with IFR/LIFR ceilings and visibilities will be at SLK/EFK where a lack of low clouds should allow for predominate fog. MPV will see periodic IFR visibilities through the beginning of the TAF period, but as low clouds dissipate in the next few hours, clearing should give way to fog beyond 08Z. Low clouds at MSS/PBG/RUT have led to bouncing MVFR 5SM visibilities from BR which should persist through 10Z, when more prevailing MVFR is expected through 12Z. While confidence is lower in mist affecting BTV, satellite imagery suggests the possibility of some late low clouds or fog intrusion into the Champlain Valley by 10Z, with further detail in the NAM3K model soundings. Only utilized a tempo group given the lower confidence. By 12Z, any low clouds and fog should dissipate with calm winds persisting through the remainder of the TAF period. Model guidance for tomorrow night suggests a return of fog to the climatologically favored terminals. Outlook... Thursday: Mainly VFR, with local MVFR possible. Likely SHRA, Chance TSRA. Thursday Night: Mainly VFR, with local IFR possible. Chance SHRA, Slight chance TSRA. Friday: Mainly VFR, with local IFR possible. Slight chance SHRA, Slight chance TSRA. Friday Night: VFR. NO SIG WX. Saturday: Mainly VFR, with local MVFR possible. NO SIG WX. Saturday Night: VFR. Slight chance SHRA. Sunday: Mainly VFR, with local MVFR possible. Chance SHRA, Slight chance TSRA.
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&& .BTV WATCHES/WARNINGS/ADVISORIES... VT...None. NY...None. && $$ SYNOPSIS...Lahiff NEAR TERM...Lahiff SHORT TERM...Lahiff LONG TERM...Danzig AVIATION...Danzig