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Area Forecast Discussion
Issued by NWS Burlington, VT
Issued by NWS Burlington, VT
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416 FXUS61 KBTV 170547 AFDBTV Area Forecast Discussion National Weather Service Burlington VT 147 AM EDT Wed Jul 17 2024 .SYNOPSIS... Showers and thunderstorms east this afternoon and evening with potentially strong to damaging wind gusts and heavy rain. One more warm and humid day is expected with a few more storms possible ahead of a cold front shifting east during the afternoon. Vermont and northern New York will then enjoy a reprieve from humid, wet weather with dry conditions and seasonable temperatures. Temperatures will begin to warm over the weekend, but a reinforcing cold front from the north will help maintain dry, seasonable condition for a bit longer after some scattered showers on Sunday. && .NEAR TERM /THROUGH THURSDAY/... As of 1209 AM EDT Wednesday...Yesterday evening`s thunderstorm/flooding threat has come to an end as showers depart the region to the east. Total rainfall amounts for the last 12 hours generally range form 0.25 to 1.25 inch, with some locally higher amounts in the northern Adirondacks and into portions of central Vermont. Main forecast challenge tonight will just be potential for some patchy fog development in areas that clear out. However, enough winds will remain just off the surface to prevent widespread formation of fog, so any fog that does form will be localized. Previous discussion follows... Heading into Wednesday, we have a proper cold front swinging southeastwards. Showers and storms still appear likely to form, mainly across Essex County, New York and the southern and eastern portions of Vermont. With about 35 to 40 knots of shear and 500-1000 J/kg of CAPE, a few stronger storms may develop before stable air drives eastwards as an upper trough moves through. It will not be quite as hot (excepting the lower Connecticut River Valley), but another humid day will be on tap. The front crosses overnight, so northern New York will enjoy mid 50s to lower 60s, but Vermont will have to wait one more day for a refreshingly cool morning. && .SHORT TERM /THURSDAY NIGHT/... As of 257 PM EDT Tuesday...Some residual showers can be expected Wednesday night, though drier air moving into the area will result in decreasing precipitation rates. Best chance for some continued overnight showers will be in Vermont, where a moisture boundary will remain draped overhead during the overnight hours. With the loss of diurnal instability, showers will be scattered in nature but can`t rule out some early night embedded rumbles of thunder. Overnight lows will be in the 60s for most areas, and into the mid to upper 50s locally over the northern Adirondacks. The moisture boundary over Vermont will clear the area by Thursday morning, allowing for drier air to work in from the northwest. Dewpoints Thursday will be noticeably lower than Wednesday`s, and high temperatures will range from the low 70s to low 80s. An upper- level shortwave dropping through will provide scattered clouds and maybe an isolated shower or two...though afternoon shower potential is capped in the 10-20 percent range. Some breezy afternoon west/northwest winds with gusts in the 10-15 mph range are expected. && .LONG TERM /FRIDAY THROUGH TUESDAY/... As of 257 PM EDT Tuesday...The work week will close out with expansive surface high pressure building to our west, which will provide tranquil weather conditions for Friday and Saturday. With the center of the anticyclone located over the midwest, our forecast area will see refreshing northwesterly flow. High temperatures will be in the 70s to mid 80s, with dewpoints in the 50s. Saturday night into Sunday brings a slight chance of showers as a cold front drops through, followed by another shot of cooler air to start next week. Given overall lack of moisture, the passage of the cold front will be largely uneventful with just some isolated to scattered showers expected. Highs Sunday will be in the 70s to low 80s, with a gradual warning trend through Tuesday. On continued northwesterly flow, no oppressive humidity on the horizon. && .AVIATION /06Z WEDNESDAY THROUGH SUNDAY/... Through 06Z Thursday...Variable conditions are expected over the first 6-8 hours of the TAF period with some areas seeing clear skies and others BR and low stratus. Lowest ceilings will be at KSLK and KMPV, but other TAF sites may see occasional low stratus and mist during the overnight hours. After 12Z, expect improvement to predominantly VFR. Showers and thunderstorms will develop between 15Z and 00Z today, but coverage will be scattered and thus have not included mention of TS in the TAFs until more precise timing is refined. Ceilings should remain mainly VFR even within storms, though visibilities will drop to the MVFR/IFR range within heavier rain showers/tstorms. Outlook... Thursday: VFR. Slight chance SHRA. Thursday Night: VFR. NO SIG WX. Friday: VFR. NO SIG WX. Friday Night: VFR. NO SIG WX. Saturday: VFR. NO SIG WX. Saturday Night: Mainly VFR, with local MVFR possible. Slight chance SHRA. Sunday: Mainly VFR, with areas MVFR possible. Slight chance SHRA. && .BTV WATCHES/WARNINGS/ADVISORIES... VT...None. NY...None. && $$ SYNOPSIS...Haynes NEAR TERM...Duell/Haynes SHORT TERM...Myskowski LONG TERM...Myskowski AVIATION...Duell