Chilly Memorial Day Weekend
A stalled-out frontal boundary stretches across the Ohio Valley and Mid-Atlantic this morning while waves of low pressure ride along the front.
Rain ahead of one of these lows is beginning to make inroads early Friday morning into the Finger Lakes. Throughout the morning, the rain will increase and become widespread.
Steady rain will then continue through the afternoon and into the evening. Gradually, the rain will push south and become more showery overnight. Showers are likely in the southern half of the region through Saturday morning before the area mostly dries out.
Rain amounts will range from near or under a half-inch to the north of I-90, to over an inch across the southern counties.
Temperatures are starting the day in the mid 40s, and very little change in temperature is expected. The best chance for a few places to reach the upper 40s will come this morning before the rain settles in. The steady temperatures will also continue this evening before dipping a couple degrees overnight.
Saturday’s temperatures will be able to rise a little, especially north of I-90 where some afternoon sun may manage to work through the clouds. Here, highs may get above 60 degrees. The rest of the region will range through the 50s, with areas near the Pennsylvania state line possibly not reaching 50 degrees.
Another low will track along this front Saturday night and then up the New England coast on Sunday. Most of the rain should stay south and east, but a few more showers will be possible. The further east, the better the chances for rain, and the cooler the temperatures.
Highs Sunday will be warmest from Rochester to Geneva, where low or even mid 60s will be possible. Coolest will be the areas east of and Elmira-Ithaca-LaFayette line, where low and mid 50s are more likely.
Memorial Day on Monday will be the start of a shift back to quiet, warmer weather, though it will be a gradual process.
There should be a fair amount of sunshine on Monday with just some occasional clouds passing through. Precipitation is not expected.
Freed from the clouds and rain, temperatures will make a jump back into the upper 60s. This will follow morning lows in the low 40s with a few pockets dipping into the upper 30s.
Tuesday will follow suit as we begin June, with sun mixing with clouds and near average temperatures in the low 70s. Mid 70s will start to show up in the north on Wednesday, but with more clouds than sun and a few late showers.
Thursday will have a front nearby, but only a few stray showers along the front. Areas that see some sun could push 80, while those that are cloudier will be lower in the 70s.
By the weekend, temperatures will be around 80 degrees throughout the region. Dewpoints will also come up well into the 60s. The extra moisture will help some scattered thunderstorms to be possible throughout the afternoon hours, beginning Friday.
This graphic represents an average over the entire Finger Lakes region. Localized variations should be expected.
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