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Philadelphia Office of Emergency Management
Sunday May 27th, 2018 :: 12:07 a.m. EDT


Flash Flood Watch

Flash Flood Watch in effect from 2:00AM until 10:00AM. Be prepared to take action in the event that flooding develops.

The National Weather Service in Mount Holly has issued a

* Flash Flood Watch for portions of New Jersey and Pennsylvania,
including the following areas, in New Jersey, Atlantic,
Camden, Coastal Atlantic, Coastal Ocean, Eastern Monmouth,
Gloucester, Hunterdon, Mercer, Middlesex, Morris, Northwestern
Burlington, Ocean, Somerset, Southeastern Burlington, Warren,
and Western Monmouth. In Pennsylvania, Berks, Delaware,
Eastern Chester, Eastern Montgomery, Lehigh, Lower Bucks,
Northampton, Philadelphia, Upper Bucks, Western Chester, and
Western Montgomery.

* Until 10 AM EDT Sunday

* Showers and thunderstorms are expected to develop overnight in
the general vicinity of the Interstate 78 corridor as a cold
front sinks south into the area. These storms will be capable of
producing very heavy rainfall with rainfall amounts in excess of
2 to 3 inches possible in just a few hours. This may lead to
urban and small stream flooding along with flooding of low-lying
areas. Flash flooding will also be possible, especially if
storms move repeatedly over the same areas. By morning, these
showers and storms will shift southward along the front,
affecting southeast Pennsylvania, including the Greater
Philadelphia area, and central New Jersey. Urban, small stream,
and flash flooding will remain a threat as the storms affect
these areas.


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.

For additional updates and weather information, visit
For all current NWS Watches, Warnings, or Advisories, visit  
For further information on emergency preparedness, visit

Philadelphia Office of Emergency Management
240 Spring Garden St
Philadelphia, PA 19123

Emergency: 9-1-1

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