On Tuesday, Long Islanders felt a significant rise in humidity levels, along with the temperatures. As a cold front slowly approaches, the heat and humidity continue, but added to the mix will be scattered thunderstorms. Then, all eyes will be on Tropical Storm Arthur and its track.
Wednesday will be the hottest day of the week, with temperatures across Long Island from the low 80s to near 90, coolest readings at the south shore and Forks. Wednesday night is a stuffy night with lows in the 70s. There is the chance of thunderstorms mainly late in the day, but the chance continues Wednesday night. However, computer guidance suggests most of this "action" will be north and west of NYC, though not completely ruling them out for Long Island.
On Thursday, more clouds enter the picture as a cold front approaches. Slow-moving thunderstorms will start inland and trudge their way eastward throughout the day. As with Wednesday's storms, some could produce heavy rainfall in this juicy, tropical airmass. Thursday night and Friday morning could end up being more wet and stormy than the daytime Thursday.
As the cold front comes through Friday morning, attention turns to what is left of Tropical Storm Arthur. Tuesday evening, it was sitting off the eastern Florida coast. By Friday is a few hundred miles due south of Fire Island, give or take. Rain and thunderstorms may linger early Friday, not only from the stalling cold front, but also from any rain bands from Arthur. The latter carries more uncertainty. Some questions remain as to how much rain reaches Long Island from Arthur, but what is more certain is this offshore track causes headaches for swimmers and beachgoers.
Into Friday, the Fourth of July, Arthur may churn the seas as it passes south and east of Long Island. Threats include a high risk of rip currents and rough surf. While it may be a surfer's paradise, the ocean waters along the south shore could be dangerous.
The bright spot in the forecast is yet another wonderful summer weekend. Highs on Saturday and Sunday will be in the 80s with plenty of sun. By then, Arthur will have worn out its welcome.