A progressively rainy day is on tap for the Delaware Valley later today as a frontal boundary moves through from the west later on. The front has a good bit of moisture to work with, having been fed over the past 24-36 hours by a steady influx off of the Atlantic, had also will be bringing its own energy to the mix. The result will be a rainy...perhaps thundery day later on through the Delaware Valley. Most computer models are in agreement that a portion of the region will pick up an inch of rain, with two inches of rain not out of the question in the heaviest of rainfall totals later on.
Rainfall may be steadier, if not heavier, this afternoon and evening across the region. The best timeframe for heavy rainfall appears to be after 2 PM locally.
While no flood watches are out today, localized ponding of water or some minor flooding can't be ruled out in the "usual suspect" streams and roads that are prone to flooding. The good news with this front is that its faster movement should result in a relatively nice afternoon after a potentially cloudy and drizzly start tomorrow.