A hot and humid Sunday on Long Island, big cool down in the 10-day forecast
It's a hot Sunday with storms unlikely, but there is more rain in the forecast ahead, along with a big cool down!
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What to know
Heat Advisory today as feels-like temperatures approach 95 to 100 degrees.
Atlantic Ocean beaches carry a moderate risk for rip currents today before conditions improve on Monday.
Dry air keeps rain chances very low on Sunday, but a line of strong to severe storms moves in late Monday afternoon into the evening commute.
After another round of rain on Thursday, a major cold front will usher in a refreshing cool down with highs dropping into the upper 70s for Friday and the weekend.
Sunny Sunday
Today is hot and humid with mostly sunny skies. It is a great day for summer activities that keep you cool, but take it easy during the peak afternoon hours. High temperatures will rise to near 90 degrees, and thick humidity will push heat index values between 95 and 100 degrees.
The National Weather Service in Upton has issued a Heat Advisory for today. For Long Island, NWS Upton triggers a Heat Advisory whenever the heat index is forecast to reach 95 to 99 degrees for two consecutive days or hit 100 degrees or higher for any length of time. While dry air overhead will keep most places rain-free, an isolated pop-up shower or thunderstorm cannot be completely ruled out during peak afternoon heating along local sea breeze boundaries.
Boat & Beach
A moderate risk for rip currents is in effect today for all Atlantic-facing beaches due to southwest wind waves. Anyone looking for relief in the ocean should swim only where lifeguards are actively on duty. Rip current risks will drop to low on Monday as ocean wave action eases.
Winds will blow out of the west to southwest at 10 to 13 mph today, with afternoon gusts reaching 15 to 20 mph along coastal areas. Marine conditions remain favorable on both the Long Island Sound and the Atlantic Ocean with no advisories in effect, though boaters should stay alert for sudden coastal wind shifts.
Monday Storms
Monday morning starts warm in the low 70s before temperatures quickly soar back near 90 degrees. Most of the daytime hours will stay dry, but an approaching cold front from the west will bring a line of strong to severe thunderstorms late Monday afternoon into the evening.
Western Long Island will likely see the first impacts from these storms. The line could bring localized damaging wind gusts, frequent lightning, and brief heavy downpours, creating slow conditions for the evening commute on the Long Island Expressway, Sunrise Highway, and LIRR branches.
Mid Week Changes
A stray shower or storm is possible early Tuesday morning before skies clear and temperatures return closer to normal in the mid-80s. Wednesday stays mostly fair during the day before a strong cold front dropping down from Canada brings another round of rain and storms Wednesday evening into Thursday.
Once that front clears, a significant cool down arrives just in time for the weekend. Sunshine and low humidity will return by Friday, bringing crisp high temperatures in the upper 70s to around 80 degrees through next weekend.
