Get Outside Quick: Yorktown's Weekend Weather

SOMERS, NY — Friday's warmth will begin to dissipate Saturday afternoon. By Saturday night, it could be sleeting. By Sunday night, thunderstorms. So get outside quickly.

According to the National Weather Service, the problem Saturday will be the timing of a back door cold front dropping into the Hudson Valley from eastern Canada.

Anyone planning outdoor activities on what should start off as a mild day should be prepared for much cooler air to arrive at some point in the afternoon, as temps should drop a good 10-15 degrees in the span of an hour or two, especially north and east of NYC, with temps by sunset in the lower 60s in NYC, 50s most elsewhere, and mid/upper 40s across eastern CT/Long Island.

By Saturday night, temps will be back in the 30s. And sleet could mix in with light rain. Then heavy rain will develop Sunday night into Monday, with thunder possible.

And if you're traveling at all this weekend, there's a lot of extreme weather going on elsewhere in the country. Airline passengers should anticipate flight delays due to blizzard conditions in the Great Plains; an ice storm across the Great Lakes, Toronto, upstate New York and New England; and storms with possible tornadoes from the central and southern plains to Ohio, said meteorologists with AccuWeather.com

Here's the National Weather Service weekend forecast for northern Westchester:

• Today-Mostly cloudy with a slight chance of showers late this morning, then partly sunny this afternoon. Not as cool with highs in the lower 70s. West winds 5 to 10 mph, becoming southwest with gusts up to 20 mph this afternoon. Chance of rain 20 percent.
• Tonight-Partly cloudy in the evening, then clearing. Lows in the lower 50s. South winds 5 to 10 mph with gusts up to 20 mph, becoming southwest after midnight.
• Saturday-Mostly sunny in the morning, then mostly cloudy with a slight chance of light rain in the afternoon. Highs in the lower 70s. Southwest winds around 5 mph, becoming north in the afternoon. Chance of rain 20 percent.
• Saturday Night-Cloudy. A chance of light rain in the evening, then light rain likely after midnight. Cooler with lows in the upper 30s. Northeast winds around 10 mph. Gusts up to 20 mph in the evening. Chance of rain 60 percent.
• Sunday-Showers likely. Much cooler with highs in the mid 40s. East winds 10 to 15 mph. Chance of rain 70 percent.
• Sunday Night-Showers. Lows in the upper 30s. Chance of rain 90 percent.

Image: AccuWeather.com