Lingering high pressure south of Long Island will generate warmer temperatures for most of this week, starting Tuesday, the National Weather Service said.

The morning commute was snarled by an fatal crash on the Northern State Parkway in the area of Dix Hills, officials said. The parkway was closed in both directions between exits 40, Route 110 in Huntington, and 42, Deer Park Avenue in Dix Hills, shortly after the 2:38 a.m. accident, with the westbound parkway reopening by about 9:30 a.m., according to the state Department of Transportation.

The weather service's Upton office calls for partly sunny skies Tuesday with daily highs in the upper 60s and pushing 70 degrees. Tuesday will be breezy, with southwest winds blowing up to 18 mph.

There will be "warmer weather the next few days," News 12 Long Island meteorologist Rich Hoffman said. "After a high of 51 Monday, temperatures will be closer to 70 through Thursday."

There's also a chance of showers late Thursday, but otherwise the seven-day forecast will be dry, Hoffman said.

The ramps to the parkway on Route 231, Deer Park Avenue, also were closed until just before 10 a.m., according to the state DOT website.

Traffic was heavy on the westbound Long Island Expressway through Suffolk, according to the state Department of Transportation website

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Traffic on most other major roadways was moving well during the commute, according to the state website

The Long Island Rail Road also was reporting good service at its site,