Area Forecast Discussion
Issued by NWS Buffalo, NY
Issued by NWS Buffalo, NY
097 FXUS61 KBUF 072338 AFDBUF Area Forecast Discussion National Weather Service Buffalo NY 738 PM EDT Sun Jun 7 2026 .WHAT HAS CHANGED... No significant changes with this forecast package. && .KEY MESSAGES... 1) Increasing heat this week. Heat indices could reach the mid 90s by the end of next week. 2) Scattered showers and thunderstorms are expected to return mid- week. && .DISCUSSION... KEY MESSAGE 1...Increasing heat this week. Heat indices could reach the mid 90s by the end of next week. An upper level ridge will build into the eastern Great Lakes region for the first part of the week. Surface high pressure will move from northern Ontario across the Northeast, before settling off the Mid- Atlantic coast by Tuesday. Mid-level flow will veer through Tuesday and warm air will move into the region. The upper level ridge axis will move across the region Tuesday and warm air advection will strengthen with mostly sunny skies. Day to day warming is expected through Tuesday, with highs in the mid to upper 80s, potentially hitting the low 90s across the lake plains and valleys in the Finger Lakes region. Lower maximum temperatures are expected near the lakeshores. As the ridge breaks down across the region the second half of the work week, increasing clouds and increasing chances for showers and thunderstorms will bring maximum temperatures slightly down Wednesday. Warm and moist conditions are expected to linger into Thursday and Friday, however confidence is lower due to an unsettled period. Heat headlines are possible for some locations across the area late in the week. KEY MESSAGE 2...Scattered showers and thunderstorms are expected to return mid-week. An upper level ridge axis is expected to move across the forecast area Tuesday. Ahead of an approaching shortwave trough, warm and moist area will spread across the region from late Tuesday through Wednesday morning, increasing the potential for scattered showers and thunderstorms. A mid-level ridge is expected to move into the region towards the end of the week, however the warm and moist airmass will reside across the region. At this time, mean 0-500mb shear is weak through Thursday night. The primary impact from any heavy showers or thunderstorms will be heavy rain, as PWAT values are expected to exceed 1.5", which is above the 90th percentile for this time of year. Drier air is expected to move into the region for the start of the weekend. && .AVIATION /00Z MONDAY THROUGH FRIDAY/... For the 00Z TAFS VFR flight conditions are found as a deep upper level trough and its associated cloud cover slides eastward, with a fair weather ridge nudging towards the eastern Great Lakes region. There likely will be fog forming tonight, especially in the So. Tier river valleys and the Black River valley east of Lake Ontario where recent rain/wet ground will be conducive for fog formation. Fog here will likely remain just to the SE of KART, through the restricted valley through the night. For KJHW, a decent flow of 12-14 knots through the boundary layer will likely produce enough mixing and prevent the river valley fog from encroaching up and over the airport, but will place a VCFG into the TAF as it will be nearby. Otherwise VFR flight conditions the remainder of this TAF cycle with a light wind influence tomorrow afternoon by local lake breeze effects. Outlook... Monday night and Tuesday...VFR. Wednesday through Friday...Mainly VFR with a chance of showers and thunderstorms. Localized lower flight CATs within any heavier showers or storms. && .MARINE... High pressure building into the lower Great Lakes will maintain quiet conditions today through early next week, with generally light to modest winds and minimal waves. && .BUF WATCHES/WARNINGS/ADVISORIES... NY...None. MARINE...None. && $$ DISCUSSION...HSK AVIATION...Thomas MARINE...HSK