Chilly air is on the move and will deliver some of the lowest temperatures of the season so far to the New York metropolitan area by the weekend.
The second and stronger of two cold fronts will reach the Atlantic coast during the day Friday.
In its wake follows an area of high pressure that had its origins over the Alaska North Slope.
Under clear skies, in dry air and diminishing wind, temperatures will stop above 40 degrees in most urban areas Friday night into Saturday morning. However, lows in the 30s are likely in many suburban locations.
Temperatures will dip low enough to allow the formation of frost in the coldest locations outside of the city. This not only includes portions of northern and central New Jersey, the lower Hudson Valley and Connecticut, but also central Long Island.
If you have pepper or tomato plants still bearing fruit, you may want to harvest these items or risk losing them. Annual flowers should be covered or brought indoors if they are potted.
Rooftop or ground-level neighborhood gardens in urban areas should survive without damage during this event as warmth given off from buildings and pavement should keep temperatures higher.
Remember that official temperatures are measured at a height of approximately 6 feet above the ground. Temperatures nearest the ground in grassy, open areas of the countryside can be much lower, hence the danger of a killing frost or freeze in this event.
After a bright, crisp autumn day Saturday, temperatures will rebound to well-above seasonable levels Sunday through much of next week.
As the region turns chilly to start the weekend, violent weather is forecast to erupt over the Central States.
The coldest air of the season so far has descended on northeastern Pennsylvania and the I-80/I-81 corridors. A storm will move in Saturday and tap into some of that cold air.
Looking for a unique holiday gift idea? Ice wine will provide a special, sweet flavor if the winter weather conditions are right.
The coldest air of the season so far has descended on central Pennsylvania. A new storm will move in Saturday and tap into some of that cold air.
Episodes of snow and slippery travel are forecast prior to the departure of Arctic air this weekend around Cleveland.
Watch the latest edition of AccuWeather LIVE, discussing how to stay warm at outdoor winter events and the conditions necessary to create the intricate designs in snowflakes.
The coldest air of the season so far is settling in around Boston. A new winter storm will move in this weekend and tap into the cold air.
Kent, WA (near Seattle) (1969)
Waterspout moved inland over Kent, south of Seattle; 5 mile path, damage to residences; 0 killed.
Charleston, SC (1899)
3.9" snow; greatest single storm total and 24- hour total for city.
Second severe storm in 10 days hit settlers.