By Lauren Casey

PHILADELPHIA (CBS) — After severe storms roared across the Delaware Valley on Saturday, another round of atypical winter-time thunderstorms is forecast for Wednesday with the potential for storms to become strong to severe.

(credit: CBS 3)

(credit: CBS 3)

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The Storm Prediction Center has issued a “Slight Risk” of severe weather for a majority of the area on Wednesday. Despite the season, the ingredients necessary for thunderstorm formation; moisture, instability and lift will be present in our atmosphere.


A strong south-westerly wind flow in advance of a potent cold front will allow temperatures to climb to near-record levels, into the low 70s, Wednesday afternoon.

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(credit: CBS 3)

(credit: CBS 3)

This will create a moist and unstable environment, and as the cold front traverses the area, it will provide the lift needed to generate a line of thunderstorms known as a squall line.

The development of a low-level jet, a fast-moving ribbon of air with speeds of 40 to 70-plus knots in the low to mid-levels of the atmosphere, will present a damaging wind threat. Heavy rainfall, frequent lightning and hail are possible as well and a brief spin-up tornado cannot be ruled out.

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The time frame of concern will be the afternoon and early evening hours as we enter the prime heating of the day. Remember to stay weather aware!