High humidity and heat are developing over the region, with extreme conditions anticipated on Friday. The National Weather Service issued Extreme Heat and Heat Advisories for parts of Northeast New Jersey, New York City, western Long Island, and the Lower Hudson Valley, effective from Friday morning until evening. An approaching cold front may trigger strong to severe storms by Friday evening, while the weekend promises continued heat, possibly less intense, along with the chance of late Sunday showers or storms.
The heat and humidity build Thursday into Friday, and some areas are expected to flirt with heat warning criteria by Friday afternoon.
An Extreme Heat Watch goes into effect at 10 a.m. Friday and lasts until 8 p.m., while a Heat Advisory starts at 11 a.m. and also lasts until 8 p.m.
Heat Advisories kick in when the heat index reaches 95-99 degrees for two consecutive days or 100-104 degrees for any length of time.
A cold front arrives Friday evening, bringing possible severe storms, though there is uncertainty about the storm's strength.
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