bws48 - You are right, Philly is like DC. I grew up outside DC and the weather changes that quickly. I also find that the weather can be very different between Philly and Bordentown (south of Trenton, where I get off of light rail and into my car). I have a pair of something similar to totes that I take with me when the forecast suggests that there might be really slushy, yucky wet weather.