An earlier statement warning of fog in Suffolk County through 4 p.m. has been upgraded to a dense fog advisory lasting until 11 p.m.
Drivers are advised that at times visibility will be lowered to a quarter of a mile or less, the National Weather Service said. Slow down, turn on low beams and leave plenty of room between you and vehicles ahead, the weather service advised.
Low ceilings are leading to some arrival and select departure delays at Kennedy and LaGuardia airports, with some departures from Long Island MacArthur Airport also affected, according to the Federal Aviation Administration's website.
A cold front moves through the area from west to east in the 11 p.m. to 1 a.m. range, bringing a few showers, but scattered thunderstorms, which were an earlier possibility, are no longer expected for the Island, said Jay Engle, weather service meteorologist in Upton.
Daily highs are expected to be in the mid to upper 50s, slightly warmer when compared with recent days, the service said.
The good news is that the quick-moving cold front leads to improving weekend conditions, News 12 Long Island meteorologist Samantha Augeri said.
Saturday's daily highs are in the upper 50s with a west wind between 11 and 15 mph. After a mostly clear night with lows in the upper 30s, Sunday is likely to be a repeat of Saturday, with a slight chance to reach a daily high of 60 degrees.
"We'll thank that cold front because it clears us out late with big improvements for the weekend," Augeri said of the late Friday system.
"Spring makes a nice comeback."