Warm, generally quiet weather is expected to hold across the Finger Lakes and Central New York through most of the weekend, with highs in the 80s and relatively comfortable humidity before a more active stretch of showers and thunderstorms settles in late Sunday and lingers into next week.
The latest National Weather Service forecast discussions from Buffalo and Binghamton keep high pressure in control through at least the first part of Sunday, limiting rain chances and holding the more widespread unsettled weather off until the second half of the weekend. From there, forecasters expect several rounds of showers and occasional thunderstorms from Sunday afternoon through at least the middle of next week, with Tuesday still standing out as the period most likely to turn busy.
No watches, warnings or advisories were posted for New York in either forecast area early Saturday, and neither office is signaling a high-end severe weather setup at the outset of this pattern change. The bigger story is a gradual shift from dry, seasonable late-July weather into a more humid and changeable stretch in which some communities may see repeated rounds of rain while others spend long periods dry between storms.
Saturday stays quiet
Saturday should be the cleaner day of the weekend for most of the region. Both forecast offices describe high pressure as the dominant feature, and that supports a broad stretch of dry weather from the northern Finger Lakes east toward Syracuse and south into the higher terrain of Central New York.
Afternoon temperatures are expected to climb into the 80s across much of the region, a few degrees warmer than Friday but still short of the more oppressive midsummer feel that often arrives when dew points rise deeper into the 60s. Binghamton forecasters said humidity should remain fairly pleasant through the day, while Buffalo forecasters also keep the warmup gradual rather than abrupt.
The one complication is that the dry forecast is not perfectly uniform everywhere. Buffalo’s discussion allows for a few isolated showers or thunderstorms Saturday afternoon and evening as a weak upper-level disturbance slides into the eastern Great Lakes and interacts with a Lake Erie breeze boundary. That setup favors the far western Southern Tier and areas closer to western New York more than the heart of the Finger Lakes, so the most likely outcome for most communities remains a dry day with a mix of sun and fair-weather clouds.
Patchy fog also remains part of the pattern in the usual valleys and lower-lying locations around daybreak. Both forecast offices continue to flag the early-morning fog signal, especially south of the Thruway and in terrain-favored river valleys, but that should burn off after sunrise and give way to the warmer afternoon.
Sunday begins the turn
Sunday still starts from a relatively quiet place, but the forecast becomes less settled as the day goes on. High pressure is expected to weaken and shift away, allowing deeper moisture to work back into the eastern Great Lakes and Central New York while weak disturbances begin moving through the broader upper-level pattern.
That change is important because it marks the point where shower and thunderstorm chances expand beyond a stray pop-up. Buffalo forecasters expect isolated to widely scattered storms Sunday afternoon and evening, while Binghamton’s discussion also brings showers and occasional thunderstorms into the forecast late Sunday as the pattern grows more active.
Even with that transition, the guidance does not support an all-day washout. Buffalo’s discussion specifically notes that storm coverage should remain sparse with plenty of rain-free time, and that fits the kind of summer setup in which one town catches a quick downpour while another stays dry under the same broad forecast. Temperatures should still reach the 80s Sunday, but the air mass is expected to feel a little stickier than it did at the start of the weekend.
For the Finger Lakes and Central New York, the forecast confidence is stronger on the regional shift than on exact timing from one county to the next. Boundary-driven storms often produce uneven results in this part of the state, especially when lake influences and terrain begin to shape where cells actually form.
Monday and Tuesday carry the steadiest risk
The clearest signal in both forecast discussions arrives from Monday into Tuesday, when a larger trough and an approaching frontal system are expected to bring more frequent showers and thunderstorms into the region. Buffalo forecasters say the best coverage currently looks to fall from Monday afternoon through Tuesday night, while Binghamton’s office keeps multiple rounds of rain and storm chances in the forecast through at least Wednesday.
That does not mean nonstop rain. Both discussions leave room for breaks, and Binghamton notes that some morning showers could be followed by partial clearing that helps recharge instability later in the day. But it does mean the atmosphere should be active enough for repeated storm windows rather than a single isolated period of weather.
Tuesday remains the day to watch most closely. Binghamton said model guidance still points to Tuesday as the busiest period in the stretch, especially as low pressure drops into the Northeast and a frontal boundary moves through. Buffalo’s office also keeps thunderstorms going into Tuesday and highlights that a better overlap of forcing and daytime heating could raise the intensity of some storms if the timing lines up correctly.
Even so, both offices stop well short of describing a clearly organized severe-weather event at this point. Binghamton said shear looks weak and that severe chances appear limited for now, while Buffalo emphasized continued uncertainty in the timing details. If stronger storms do develop, the more credible concerns at this stage appear to be localized gusty winds, lightning and heavier downpours rather than a broad, higher-end severe threat.
Rain chances may linger into midweek
The unsettled pattern may not end as soon as the Tuesday system passes. Binghamton’s discussion keeps wraparound moisture and additional shower chances in the picture through at least Thursday, and possibly Thursday night, before weak high pressure tries to reassert itself by the end of the week. Buffalo also trends the broader pattern drier later next week, but not immediately.
That part of the forecast carries more uncertainty than the early-week transition, especially when it comes to where the heaviest rain bands might set up and how much dry time develops between rounds. Binghamton noted that precipitable water values should stay only modestly elevated overall, but also said there is at least some training potential if the flow aligns with a passing frontal boundary Tuesday. Even with that possibility, forecasters said hydro concerns remain low for now because the region heads into the pattern after several relatively dry days.
Temperatures are expected to ease back closer to, or slightly below, late-July normals once the more persistent clouds and showers arrive. That would make next week feel noticeably different from the warm, fairly pleasant start to the weekend, even if the forecast still includes extended dry breaks between the more active periods.
By Friday or next weekend, both forecast offices suggest the region should begin trending drier again as weak ridging and surface high pressure build back in. That later improvement is still far enough out to leave room for adjustments, but the overall arc of the forecast remains consistent: a mostly quiet weekend start, a late-Sunday turn toward scattered storms, and the most changeable weather arriving from Monday through midweek.
Check the latest forecast at the FingerLakes1.com Weather Center.
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