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LI forecast: Sunny, cold Tuesday before snow arrives Wednesday

Bride Wendy Guitierrez, 32, of Hempstead, giggles as

Bride Wendy Guitierrez, 32, of Hempstead, giggles as her hair and wedding dress blow in a gust of wind in Eisenhower Park, December 6, 2021 in East Meadow, N.Y. She married Jose Guitierrez today in unseasonably warm with temps hitting 60 degrees but windy.. Credit: Debbie Egan-Chin

A cold and windy overnight will usher in a sunny, chilly Tuesday, setting the stage for the season's first accumulating snowfall Wednesday, forecasters said.

The National Weather Service, in a Monday night report, said: "A coastal low pressure system will bring a widespread light snowfall across the area on Wednesday, possibly mixed with rain at the onset. Light accumulations are possible and may impact the evening commute."

Earlier forecasts had called for less than an inch but the weather service said Monday that up to two inches is possible for some parts of the tristate, with eastern Long Island expected to get the most.

The precipitation, a mix of rain and snow, will begin about 9 a.m., turning to snow in late morning, going all day and ending late Wednesday afternoon from west to east, the weather service said.

After a high of 60 degrees Monday, the thermometer will fall to about 35 at night with a chance of a rain, the National Weather Service said. The temperature outside could be feel much colder. Wind gusts of up to 50 mph are possible, according to a special statement posted on the weather service's website Monday night.

Gale warnings were issued for all of Long Island Sound through Monday night.

Before Wednesday's snow, Tuesday will see calmer winds and the sun comes out with a high of 42. And the day after, on Thursday, sunshine arrives again, along with another high of about 42 degrees.

Wednesday’s snowflakes will result from the interplay of two other systems: an upper-level trough, an elongated low pressure system, entering the Ohio Valley, and a low pressure system along the Carolina coast. The rising air in these low pressure systems can condense into clouds.

More rain, and a quick shot of snow, could develop again early Friday morning, after 1 a.m., the forecasters said.

The odds of needing umbrellas are 30%, both before dawn and until around 1 p.m. on Friday, which will reach almost 50 degrees, forecasters said, with thickening clouds.

After another cloudy night, the chances of more rain falling on Saturday were assessed at 40%, and once again, it will be noticeably warm, with the daytime high climbing to 58.

The odds of yet more showers rise to 60% that night; the low will be around 41.

On Sunday, there is 50% chance of showers, and both clouds and much of that warmth continue, with thermometers ascending to around 53, the weather service said.

With Joan Gralla

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