Looks like it will be a hit or miss thing, but where it hits will be heavy. Flash flood watches are up.
Flash Flood Watch
New Castle-Kent-Cecil-Kent MD-Queen Annes-Talbot-Caroline-Sussex-
Northwestern Burlington-Ocean-Coastal Ocean-
Delaware-Philadelphia-Western Chester-Eastern Chester-
Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Wilmington, Dover, Elkton, Chestertown,
Centreville, Easton, Denton, Newton, Washington, Morristown,
Flemington, Somerville, New Brunswick, Freehold, Sandy Hook,
Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown,
Mount Holly, Jackson, Long Beach Island, Wharton State Forest,
Jim Thorpe, Stroudsburg, Reading, Allentown, Bethlehem, Media,
Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square,
Collegeville, Pottstown, Norristown, Lansdale, Chalfont,
Perkasie, Morrisville, and Doylestown
332 AM EDT Wed Jul 25 2018
...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT...
The Flash Flood Watch continues for
* Portions of Delaware, northeast Maryland, New Jersey, and
Pennsylvania, including the following areas, in Delaware, Kent
and New Castle. In northeast Maryland, Caroline, Cecil, Kent
MD, Queen Annes, and Talbot. In New Jersey, Camden, Coastal
Ocean, Eastern Monmouth, Gloucester, Hunterdon, Mercer,
Middlesex, Morris, Northwestern Burlington, Ocean, Salem,
Somerset, Southeastern Burlington, Sussex, Warren, and Western
Monmouth. In Pennsylvania, Berks, Carbon, Delaware, Eastern
Chester, Eastern Montgomery, Lehigh, Lower Bucks, Monroe,
Northampton, Philadelphia, Upper Bucks, Western Chester, and
* Through late tonight
* Showers and scattered thunderstorms will develop today and
continue into tonight. A tropical airmass will support areas of
heavy rain, especially if there is training of showers and
thunderstorms over the same area. Rainfall amounts over 1 inch
in an hour are possible, locally higher amounts are possible
where there is training of showers and thunderstorms.
* Excessive rainfall within a short period of time can lead to
rapidly rising water and flash flooding, particularly in urban
areas and along small creeks and streams.
A Flash Flood Watch means that there is the potential for flash
flooding which can be life-threatening. Heavy rain is expected to
occur over a short period of time. Rapidly rising flood waters
may quickly inundate roadways and areas of poor drainage. Streams
and creeks could leave their banks, flooding nearby properties.
Please monitor the forecast, especially if you live in a location
that is prone to flooding. Be prepared to take action if a flash
flood warning is issued for your area.