Saturday, September 8, 2012

Strong To Severe Thunderstorms Likely For This Evening, Followed by A Taste Of Fall !

A strong cold front now moving through the Ohio Valley this morning, will quickly move eastward and approach the Delaware Valley later this afternoon and evening. Ahead of this cold front, we have a warm and very moist atmosphere in place. This warm and unstable airmass will be the main fuel, but our approaching strong cold front will be the main trigger to produce a line of strong to severe thunderstorms, as it moves through this evening.

I'm expecting this line of storms to move through our area from west to east, between 4:00 PM and 11:00 PM this evening. Folks in our northern and western suburbs of PHL, should see this line of storms between 4:00 PM and 7:00 PM, with PHL, DE, and NJ mainly between 7:00 PM and 11:00 PM. Some of these storms will reach Severe limits with Damaging winds to near 60 or 70 MPH and Large Hail, so stay tuned during the afternoon and evening hours, for any warning that may be issued by the NWS.

This strong cold front will sweep off the NJ coast around midnight, followed by a much cooler and drier air from Canada. Sunday through Wednesday we can expect highs in the mid to upper 70's and lows in the 50's. With low dew points and drier air, this will feel quite pleasant and welcoming. North and NW winds of 10-20 MPH and cooler temperatures for both Sunday and Monday will give us a nice taste of early Fall weather, which continues into mid-week.

Later this week and into next weekend, temps will moderate to the low and mid 80's during the day and the low to mid 60's at night. The good news, both the dew points and humidity levels will remain low, so no more muggy/humid weather for at least the next week or so.

Enjoy the coming taste of Fall, starting tomorrow, but also be aware, some strong to severe thunderstorms will precede these changes for later this afternoon and evening.

Take Care,

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