By Justin Drabick

PHILADELPHIA (CBS) – The unofficial start to summer will feel like mid summer this weekend with a hot and humid weather pattern in place.

High temperatures average in the upper 70s this time of year but will be a good 10+ degrees above the average through Memorial Day. There will be some showers and storm chances as a lingering frontal boundary and high heat and humidity will help trigger and fuel some storms each afternoon.

The front will remain north of Philadelphia and it triggered a line of strong storms Saturday night, north of the city. These storms will diminish Saturday evening, but the threat for a shower or storm (mainly north of Phila.) will return Sunday as the front still lingers to our north.

Highs on Sunday will be in the mid to upper 80s. Memorial Day looks very hot and humid with highs near 90 but the humidity will make it feel like well in the mid 90s. An excessive heat watch is issued for Monday afternoon through Tuesday night. There will be a chance for a shower or storm on Monday but not as high as Sunday.

Better chances for showers and storms will arrive on Tuesday as a cold front slides through the region. The forecast should remain dry at the shore but with cool ocean water temps in the 60s, afternoon highs in the mid-upper 70s through Memorial Day.

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