By Matt Peterson

PHILADELPHIA (CBS) — After a soggy start to our Sunday with rain and a few rumbles of thunder this morning we’re getting a break this afternoon. That said the Eyewitness News weather team continues to track a narrow line of thunderstorms which have the potential to turn severe.

The mugginess is palpable as we sit on the backside of a warm front and await an approaching cold font. The mechanism responsible for the line of storms which is currently traversing central Pennsylvania and will cross our region between 6 p.m. and 9 p.m. The approximate timing for the weather to hit Center City is 7 p.m.

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The first Severe Thunderstorm Watch of 2021 has been issued for parts of Southeastern Pennsylvania, New Jersey, and Delaware until 9 p.m. The Severe Thunderstorm Watch includes Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester, Mercer, Monmouth, Ocean and Salem Counties in New Jersey; Kent, New Castle, and Sussex Counties in Delaware; and Bucks, Chester, Delaware, Montgomery and Philadelphia Counties in Pennsylvania.

During this time heavy downpours and strong wind gusts will be possible.

A spin-up tornado cannot be completely ruled out — but the chance of that is more in the central and southern portions of Delaware rather than closer to Philadelphia.

The cold front clears the Philadelphia area late this evening, setting the stage for a windy and chilly night.

Lows tonight will dip into the low 40s throughout the region and winds could gust up to 30mph at times.

The start of the week will be breezy and chilly.

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You can expect plenty of sunshine Monday, but highs will only be in the mid 50s — and wind gusts especially in the morning could be as high as 40mph.

Temperatures are expected to be back in the 60s Tuesday with more sunshine. It should be a typical spring day.

By Wednesday, the region’s next weather maker is expected to move in.

Rain will be likely Wednesday with a few thunderstorms as well. Highs Wednesday afternoon will rise into the low 60s.

The shock to the system then comes Wednesday night and Thursday.

Thursday is April 1, but it will remind us more of Jan. 1.

Spotty rain showers will be possible Thursday morning in the city however, some wet snowflakes will be something the Eyewitness Weather Team monitors across the Poconos, not just Thursday morning but into the afternoon as well.

Highs on Thursday will only be in the upper 40s.

It turns even colder by the end of the week as lows on Friday morning could be in the 20s and highs might not escape the low 40s.

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Stay with the Eyewitness News Weather Team for the most up-to-date forecast.