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UPDATE: A heat advisory was put into place at 12:21 for these additional counties: Sussex, Warren, Morris, Hunterdon, Somerset, Middlesex, western Monmouth, Mercer, Gloucester, Camden, Ocean and Burlington. It lasts until 7 p.m. with a heat index of up to 100 expected.

Ocean-Southeastern Burlington

By Jeff Goldman/NJ Advance Media for NJ.com

The hot, humid weather continues Tuesday in New Jersey with a third consecutive day of 90-plus degree temperatures for much of the state.

That means once the thermometer hits that mark this afternoon we'll officially have a heat wave.

The other thing to watch out for later is a threat of afternoon pop-up showers and thunderstorms. It's only about a 20 to 30 percent chance that they'll develop but heavy downpours could cause flooding in areas with poor drainage.

Otherwise, we should see sunny skies.

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With temperatures in the upper 80s to mid 90s and heat index values approaching 100° in some places, it's not just... Posted by US National Weather Service New York NY on Tuesday, August 7, 2018

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Tomorrow (August 7) is a big day in Philadelphia weather history, the 100th anniversary of the city's hottest day on record. The temp reached 106. It is also the 100th for Wilmington, which recorded a temp of 107 on August 7, 1918. #pawx #dewx #njwx pic.twitter.com/rNdSdtbCkA — NWS Mount Holly (@NWS_MountHolly) August 6, 2018

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While it'll be plenty warm everywhere, only the five northeastern counties (Bergen, Essex, Hudson, Passaic and Union) are under a heat advisory this morning. Temps will climb into the low to mid 90s this afternoon though it will feel even hotter — the National Weather Service says the heat index will be between 95 and 100.

The advisory expires at 6 p.m.

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The heat will be plenty stifling most everywhere, albeit not nearly as bad as Monday. Afternoon highs are expected to reach 92 in Newark, 91 in Trenton and 92 in Camden. On Monday, the high reaches 95 in Newark, a bit shy of the record 97 set in 2001, according to the weather service. Trenton's peak temp was 93, while at Atlantic City International Airport, the mercury reached 93.

The high temperature in New Jersey on Monday was 96 in Hawthorne, Passaic County, according to the state climatologist's office. The Bergen County towns of Haworth and Lyndhurst made it to 95.

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Here are your numbers for the day. Hot & humid again this afternoon with a few drenching storms around. More of the same Wed., but a little better afer that. Your 7Day on @6abc + @GMA. Have a good one! pic.twitter.com/l1YkDcSuLu — davidmurphy6abc (@davidmurphy6abc) August 7, 2018

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There's again a moderate risk of rip currents along the ocean on Tuesday. As usual, temperatures will be a bit cooler at the shore — it should be in the low 80s on Long Beach Island, about 84 in Cape May and at Island Beach State Park and 86 in Asbury Park.

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Hot, Hazy, Humid Today and Tomorrow With Thunderstorms in the Afternoon! Less Humid and A Bit Cooler top End The Week! Just a Scattered Afternoon Thunderstorm This Weekend. pic.twitter.com/pQL7SPsUHk — Bill Evans (@Evansweather) August 7, 2018

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The chance of showers and thunderstorms increases into the evening and overnight. Then Wednesday, it's likely we'll have afternoon rain that could be heavy as well as possibly strong winds.

It'll still be humid, but a a touch cooler with highs in the upper 80s to near 90. Thursday and Friday are shaping up as mainly dry and sunny with temps in the upper 80s.

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Jeff Goldman may be reached at jeff_goldman@njadvancemedia.com. Follow him on Twitter @JeffSGoldman. Find NJ.com on Facebook.

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