Chances of a weekend snow flurry or two have diminished greatly, thanks to a low-pressure system that is tracking more southerly than first anticipated, the National Weather Service said Friday.

The Upton-based service had predicted Thursday a 30 percent to 40 percent chance of snow, for Long Island, beginning late Saturday and into Sunday morning. But the service has since altered that forecast.

Chance of snow is 20 percent, and with temperatures ranging from the mid 30s to low 40s this weekend there is but a slight possibility of accumulation, said Tim Morrin, a meteorologist with the service.

"That system, rather than tracking up the coast, will scoot out from a line near Tennessee to Cape Hatteras and then straight out to sea," Morrin said.

For Long Island, that means warmer temperatures overall, less rain and a small chance of snow.

A northern branch of the system could produce a mix of snow and rain, before 10 a.m. Sunday, the service said. But with a high of 42 degrees, it's unlikely that anything will stick to the ground.

Sunday night also calls for a slight mix of rain and snow, mostly before 11 p.m.

The best weather news for the weekend: Saturday is likely to be clear and mostly sunny, with a high of 45 degrees.

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