Mostly clear, breezy at times and becoming chilly. Highs this afternoon under sunshine only hit the low 60s. It is cooling through the 50s and eventually 40s during the mid-evening hours. Have a coat with you if you will be out tonight.

Skies will be clear, with a lighter wind and chilly. Temperatures will be in the low to mid-40s across most of Long Island. It will be colder in and around the Pine Barrens and the Hamptons, with low temperatures early Wednesday morning in the 30s there. This can lead to the first frost of the season in those colder spots early Wednesday. Protect any sensitive vegetation in eastern Suffolk County tonight just in case and dress warmly overnight and early in the morning.

Wednesday through Saturday continues to look great for local weather across Nassau and Suffolk counties. It will be mostly sunny, with a light breeze each of those days. Temperatures will be warmest on Thursday, mostly in the mid-70s. The rest of the stretch will be seasonable in the upper 60s. Overnight temperatures will be more comfortable after tonight, too. mostly in the upper 40s to mid- 50s.

Tropical Depression Nine officially formed in the Gulf Tuesday afternoon. This is likely to soon become Tropical Storm Isaias (ees-ah-EE-ahs). This is important to Long Island because some tropical moisture in the form of steady rain from this may reach the Island by early next week.

This storm would track inland from the Gulf and weaken, but it is possible that rain from this can extend into the northeast and Long Island by late Sunday into Monday. This would NOT be a tropical storm or hurricane for Long Island. A likely worst-case scenario on Long Island would be 1" to 2" of rain and a very wet Sunday evening through Monday next week. You can see details on News 12's new tropical weather page here. The News 12 Storm Watch Team will keep you updated on this through the week.

TONIGHT: Clear and chilly, with lows in the low 40s. It will be colder - in the 30s, with patchy frost possible - in and around the Pine Barrens and the Hamptons. Wind: light out of the northwest.

WEDNESDAY: Beautiful again, with a sunny sky. Wind: southwest 5 to 15 mph. Highs will be around the mid-60s. Lows near 57.

THURSDAY: Sunny and warmer. Highs around 72. Lows near 55.

FRIDAY: Mostly sunny. Highs near 68. Lows near 53.

SATURDAY: Mostly sunny. Highs around 67. Lows near 54.

SUNDAY: Increasing clouds, with the chance for late-day rain. Highs around 68. Lows near 57.

MONDAY: RAIN CHANCE - Cloudy, with periods of moderate to heavy rain possible. Highs near 69. Lows near 56.

TUESDAY: Early showers give way to sunshine. Highs around 66. Lows near 55.