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Philadelphia under enhanced risk for severe weather Sunday, flash flooding, isolated tornado possible

Philadelphia region, New Jersey under "enhanced" risk for severe weather Sunday
Philadelphia region, New Jersey under "enhanced" risk for severe weather Sunday 02:33

PHILADELPHIA (CBS) — Parts of Delaware and New Jersey — Atlantic, Cape May, Cumberland and Kent Counties — are under a severe thunderstorm watch until 11 p.m.

Northern New Castle County is under a flash flood warning until 12:45 a.m. Monday, according to the National Weather Service. 

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More potentially severe storms Sunday night

Much of the region was under a thunderstorm watch earlier in the evening, and a heat advisory for all areas adjacent to the I-95 corridor, including Philadelphia; Wilmington, Delaware; and Trenton, New Jersey, expired at 7 p.m.

Heat advisory for Sunday, June 30, 2024
Heat advisory for Sunday, June 30 CBS Philadelphia

But a NEXT Weather Alert is still in effect for Sunday night. According to the National Weather Service office in Mount Holly, New Jersey, hail, lightning and wind gusts up to 75 mph are likely.

Scattered showers and strong to severe storms developed across the Delaware Valley ahead of a cold front and are now moving east across New Jersey toward the shore. Our entire area is under an enhanced risk of severe weather, or Level 3 on a five-point scale.

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The main threats are damaging winds, heavy rain with possible flash flooding and an isolated tornado, and the storms will arrive in South Jersey between 6-10 p.m.  

Severe weather threats for Sunday afternoon and evening
Severe weather threats for Sunday afternoon and evening CBS Philadelphia

Cooler start to the week

Following Sunday's storms, cooler and more comfortable conditions arrive on Monday and Tuesday, where we'll see sunshine and highs in the low 80s.

On Wednesday, we warm up again to near 90 with partly sunny skies. Then for the Fourth of July it'll be muggy and hot with highs in the low 90s and a feels-like nearing 100.

Another Heat Advisory and NEXT Weather Alert may be needed for Thursday. Showers and storms are also possible for the holiday on Thursday, although these may be very widely scattered.

Keep it close to CBS Philadelphia today, as the entire NEXT Weather Team continues to monitor the severe weather threat across the Delaware Valley.

7-day forecast

7-day forecast
7-day forecast CBS Philadelphia

Sunday: High of 91, NEXT Weather Alert Day

Monday: High of 82, low of 63, sunny and warm

Tuesday: High of 86, low of 63, sunny and warm

Wednesday: High of 86, low of 65, mostly sunny 

Thursday: High of 93, low of 72, storm or two possible

Friday: High of 91, low of 74, few storms

Saturday: High of 91, low of 75, scattered storms

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