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Update on Tropics with Nana no longer expected today and Long Island weather through Labor Day:

Tropics:

  • Tropical Depression Fifteen is encountering strong wind shear, and while there is still a slight chance that it becomes Tropical Storm Nana today, it's not looking likely.

  • Regarding Invest 99L in the Caribbean, this is from the National Hurricane Center: a tropical depression is likely to form during the next couple of days before the system reaches Central America Wednesday night. Locally heavy rains and gusty winds are possible on Jamaica today, and interests there, as well as in northern Nicaragua, Honduras, Belize, Guatemala, and the Yucatan Peninsula, should monitor the progress of this disturbance.

  • The tropical wave that will be emerging off the coast of Africa is being given a 30% chance of tropical development within the next 5 days by the National Hurricane Center. This one will bear watching.

Long Island:

  • Today: Cloudy and humid this morning with scattered showers, and then becoming partly cloudy this afternoon with highs mostly in the upper 70's. The wind will be mostly out of the ESE to SE at 10 to 15 mph.

  • Tomorrow: Cloudy and humid with a 60% chance of scattered showers at times and possibly a thunderstorm in the late afternoon or evening. Highs will be mostly in the upper 70's.

  • Thursday: Partly cloudy, warm, and humid with a 30% chance of a scattered thunderstorm in the afternoon or evening. Highs mostly in the low to mid 80's. There is a better chance of showers and thunderstorms later at night in association with the cold front that will be moving through.

  • Friday: Mostly sunny and very warm with decreasing humidity throughout the day. Highs mostly in the mid 80's, but some upper 80's are possible for northern and western sections of Long Island. Cooler for the south shore and east end.

  • Saturday: Partly cloudy and cooler with low humidity with highs mostly in the mid to upper 70's.

  • Sunday: Sunny with low humidity with highs mostly in the mid to upper 70's.

  • Labor Day: Mostly sunny in the morning with clouds possibly increasing by late afternoon with a 30% chance of showers by evening or at night with an approaching cold front. Highs mostly in the upper 70's with moderate humidity levels.

- 1st image: Tropical Depression Fifteen

- 2nd image: From the National Hurricane Center.

- 3rd image: Euro ensembles for the next 15 days.

- 4th image: Projected temperatures for Long Island for the next 10 days from the National Weather Service model blend.

- 5th image: Projected rainfall for the next 7 days from the Weather Prediction Center.

- 6th image (video): Simulated future radar from the NAM model from 2 PM today to 2 PM Thursday.









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