Center City to Cobbs Creek Trail

I was looking for another ride this weekend if the weather holds out. From Center City, I was considering heading west on Walnut Street, riding the Cobbs Creek Trail and back on Chestnut Street? A few questions - how is the Cobbs Creek trail after Saturday’s storms? Is there another way to get through West/Southwest Philly to Grays Ferry Avenue to cross that bridge and get back on the SRT? How safe is Chestnut and Walnut Streets in West Philadelphia? Any suggestions?

Thanks in advance.