Although a dense fog advisory issued for early Friday has expired, light rain, wind and low cloud cover are still causing travel problems in the metropolitan area, with a handful of traffic accidents reported in Nassau and Suffolk -- and delays at area airports.

By midafternoon, weather-related delays were still being reported for flights in and out of Kennedy, LaGuardia and Newark Liberty airports.

Long Island MacArthur Airport flights were mostly on time.

The FAA advised travelers to check with their airlines.

The New York State Department of Transportation reported a handful of accidents involving vehicles on the Southern State Parkway.

Suffolk County police reported a significant accident, a collision between a car and a truck, closed westbound Veterans Memorial Highway near Broadway in Holbrook at 5:46 a.m. The state DOT said the road was reopened at 9:23 a.m.

The Long Island Rail Road did not report any weather-related delays, but said 5-to-10-minute delays affected both the Port Jefferson and Ronkonkoma branches during the morning rush after a vehicle strike on the railroad bridge over Post Avenue in Westbury. That issue forced trains to operate at reduced speed in the area, the railroad said.

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The weather service said rain is likely for much of the day Friday and that temperatures, in the mid-50s early morning, will drop dramatically -- settling in the low 40s by midafternoon or early evening. Overnight temperatures will dip into the 30s.

Forecasters said about a half-inch of rain is possible, but warned that rain could turn into a wintry mix including sleet overnight into Saturday.