Weather Alerts for Philadelphia, PA

Issued by the National Weather Service

Coastal Flood Advisory  COASTAL FLOOD ADVISORY   Coastal Flood Advisory

Areas Affected:
Delaware - Lower Bucks - Philadelphia
Effective: Sat, 4/20 12:00am Updated: Fri, 4/19 8:09pm Urgency: Expected
Expires: Sat, 4/20 4:00am Severity: Minor Certainty: Likely

The National Weather Service in Mount Holly has issued a Coastal
Flood Advisory, which is in effect from midnight tonight to 4 AM
EDT Saturday.
* LOCATIONS...The tidal portions of the Delaware River down to the
Commodore Bay Bridge area.
* TIMING...High tide on the tidal Delaware River occurs between
2:00 and 3:30 AM Saturday.
* COASTAL FLOOD IMPACTS...Up to one half foot of saltwater
inundation above ground level is possible in low-lying areas
near shorelines and tidal waterways. In Philadelphia, roadway
flooding is possible in the Navy Shipyard, and along Linden
Avenue, Spring Garden Street, and Washington Avenue. In Delaware
County, flooding is possible in Tinicum Township. In Gloucester
and Camden Counties, roadway flooding is possible in Camden,
West Deptford Township, Gloucester City, and other locations
near the Delaware River and its tributaries. Minor flooding is
possible in Bristol, South Trenton, Hamilton Township,
Burlington City, Delran, and other locations near the Delaware
River and its tributaries.
Time of high total tides are approximate to the nearest hour.
Burlington NJ
MLLW Categories - Minor 9.3 FT, Moderate 10.3 FT, Major 11.3 FT
MHHW Categories - Minor 1.6 FT, Moderate 2.6 FT, Major 3.6 FT
Total      Total    Departure
Day/Time    Tide       Tide     from Norm   Flood
ft MLLW    ft MHHW       ft      Impact
--------  ---------  ---------  ---------  --------
20/04 AM    10.1        2.4        1.0       Minor
20/04 PM     9.3        1.6        0.8       Minor
21/04 AM     9.9        2.2        0.8       Minor
21/05 PM     9.1        1.4        0.8        None
22/05 AM     9.8        2.1        0.8       Minor
Philadelphia PA
MLLW Categories - Minor 8.2 FT, Moderate 9.2 FT, Major 10.2 FT
MHHW Categories - Minor 1.5 FT, Moderate 2.5 FT, Major 3.5 FT
Total      Total    Departure
Day/Time    Tide       Tide     from Norm   Flood
ft MLLW    ft MHHW       ft      Impact
--------  ---------  ---------  ---------  --------
20/03 AM     8.5        1.8        1.0       Minor
20/03 PM     7.7        1.0        0.8        None
21/04 AM     8.3        1.6        0.8       Minor
21/04 PM     7.5        0.8        0.8        None
22/04 AM     8.2        1.5        0.8       Minor

A Coastal Flood Advisory means that minor tidal flooding is
expected. Minor tidal flooding often results in some road
closures. Usually, the most vulnerable roadways will flood.
Do not leave your vehicle at a location that is prone to tidal
flooding. Do not drive your vehicle through flood waters. The
water may be deeper than you think it is. You will be putting
yourself in danger and your vehicle may be damaged, leading to
costly repairs.
Visit the Advanced Hydrologic Prediction Service at for additional water level and flood
impact information for your local tide gauge.

Flash Flood Watch  FLASH FLOOD WATCH   Flash Flood Watch

Areas Affected:
Berks - Carbon - Delaware - Eastern Chester - Eastern Montgomery - Lehigh - Lower Bucks - Monroe - Northampton - Philadelphia - Upper Bucks - Western Chester - Western Montgomery
Effective: Fri, 4/19 3:16pm Updated: Fri, 4/19 8:09pm Urgency: Expected
Expires: Sat, 4/20 10:00am Severity:  Severe  Certainty: Possible

The Flash Flood Watch continues for
* Portions of Delaware, northeast Maryland, New Jersey, and
Pennsylvania, including the following areas, in Delaware,
Delaware Beaches, Inland Sussex, Kent, and New Castle. In
northeast Maryland, Caroline, Cecil, Kent MD, Queen Annes, and
Talbot. In New Jersey, Atlantic, Atlantic Coastal Cape May,
Camden, Cape May, Coastal Atlantic, Cumberland, Gloucester,
Hunterdon, Northwestern Burlington, Salem, Southeastern
Burlington, and Warren. In Pennsylvania, Berks, Carbon,
Delaware, Eastern Chester, Eastern Montgomery, Lehigh, Lower
Bucks, Monroe, Northampton, Philadelphia, Upper Bucks, Western
Chester, and Western Montgomery.
* Through Saturday morning
* Showers and some thunderstorms, locally heavy, will move across
eastern Pennsylvania and far western New Jersey early this
evening. A second cluster of showers and some thunderstorms
moves across the region late tonight into early Saturday
morning. Areas of 1 to 2 inches of rain can be expected with
local amounts up to 3 inches possible.

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.