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4 products issued by NWS for: Philadelphia PA
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Flash Flood Watch

Flood Watch
National Weather Service Mount Holly NJ
446 AM EDT Thu Sep 23 2021

DEZ001-PAZ070-071-102-104-106-240215-
/O.CON.KPHI.FF.A.0011.210923T1500Z-210924T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Delaware-Philadelphia-Eastern Chester-Eastern Montgomery-
Lower Bucks-
Including the cities of Lansdale, West Chester, Media, Morrisville,
Wilmington, Philadelphia, Doylestown, Kennett Square, and Norristown
446 AM EDT Thu Sep 23 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 11 AM EDT THIS MORNING
THROUGH LATE TONIGHT...

The Flash Flood Watch continues for

* Portions of northern Delaware...and southeast Pennsylvania...
  including the following areas...in northern Delaware...New Castle.
  In southeast Pennsylvania...Delaware, Eastern Chester, Eastern
  Montgomery, Lower Bucks, and Philadelphia.

* From 11 AM EDT this morning through late tonight.

* Showers and thunderstorms will develop ahead of and with the
  passage of a cold front this afternoon and evening. Rain will be
  heavy at times. Widespread rainfall totals will range from 1.5 to
  3 inches with locally higher amounts possible.

* Flash flooding of creeks, streams, urban areas, and poor drainage
  areas is possible in the areas of heaviest rain.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$



Flood Advisory

Flood Advisory
National Weather Service Mount Holly NJ
1133 AM EDT Thu Sep 23 2021

DEC001-003-NJC011-015-033-PAC011-029-045-091-101-231830-
/O.NEW.KPHI.FA.Y.0185.210923T1533Z-210923T1830Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kent DE-New Castle DE-Cumberland NJ-Gloucester NJ-Salem NJ-Berks PA-
Chester PA-Delaware PA-Montgomery PA-Philadelphia PA-
1133 AM EDT Thu Sep 23 2021

The National Weather Service in Mount Holly has issued a

* Flood Advisory for...
  Northern Kent County in central Delaware...
  New Castle County in northern Delaware...
  Western Cumberland County in southern New Jersey...
  Northwestern Gloucester County in southern New Jersey...
  Salem County in southern New Jersey...
  Southeastern Berks County in eastern Pennsylvania...
  Chester County in southeastern Pennsylvania...
  Delaware County in southeastern Pennsylvania...
  Southwestern Montgomery County in southeastern Pennsylvania...
  Southwestern Philadelphia County in southeastern Pennsylvania...

* Until 230 PM EDT.

* At 1133 AM EDT, Doppler radar indicated heavy rain due to
  thunderstorms. Minor flooding is expected to begin shortly in the
  advisory area as the heavy rain moves into the area. Rainfall
  rates of 1 to 2 inches in an hour or two are occuring with these
  storms.

* Some locations that may experience flooding include...
  Philadelphia, Wilmington, Dover, Newark, Bridgeton, Middletown,
  West Chester, Norristown, Chester, Deptford, Pottstown, and West
  Deptford.

This includes the following highways...
New Jersey Turnpike between exits 1 and 2.
Pennsylvania Turnpike between mile markers 296 and 333.
Interstate 95 in Pennsylvania between mile markers 0 and 16.
Interstate 95 in Delaware between mile markers 0 and 23.
Interstate 76 in Pennsylvania between mile markers 327 and 336...and
between mile markers 346 and 349.
Interstate 295 in New Jersey between mile markers 0 and 23.
Interstate 176 in Pennsylvania between mile markers 1 and 10.
Interstate 476 in Pennsylvania between mile markers 0 and 19.

LAT...LON 4032 7615 4024 7536 3981 7513 3913 7523
      3900 7574 3972 7579 3972 7584 4014 7587

$$

Robertson



Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
1101 AM EDT Thu Sep 23 2021

PAZ071-241501-
Philadelphia-
1101 AM EDT Thu Sep 23 2021

This Hazardous Weather Outlook is for Philadelphia County in
Pennsylvania.

.DAY ONE...Through tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Coastal Flood Advisory.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

$$



Coastal Flood Advisory

Coastal Hazard Message
National Weather Service Mount Holly NJ
958 AM EDT Thu Sep 23 2021

NJZ017>019-PAZ070-071-106-232300-
/O.CON.KPHI.CF.Y.0011.210923T1800Z-210923T2300Z/
Gloucester-Camden-Northwestern Burlington-Delaware-Philadelphia-
Lower Bucks-
958 AM EDT Thu Sep 23 2021

...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 2 PM THIS
AFTERNOON TO 7 PM EDT THIS EVENING...

* WHAT...Up to one half foot of inundation above ground level
  expected in low-lying areas near shorelines and tidal waterways.

* WHERE...The tidal Delaware River and its tidal tributaries down
  to the Commodore Barry Bridge area.

* WHEN...From 2:00 PM this afternoon until 7:00 PM this evening.

* IMPACTS...At this level, flooding begins on the most vulnerable
  roads along tidal waterways. Some partial or full road closures
  are possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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
water.weather.gov/ahps for additional water level and flood impact
information for your local tide gauge.

&&

Time of high total tides are approximate to the nearest hour.

Delaware River at Philadelphia
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
 --------  ---------  ---------  ---------  --------
 23/04 PM     8.5        1.8       1.7      Minor
 24/04 AM     7.5        0.8       0.9       None
 24/05 PM     7.7        1.0       0.9       None
 25/05 AM     7.2        0.5       0.9       None
 25/05 PM     7.6        0.9       0.9       None
 26/06 AM     6.9        0.2       0.8       None

Delaware River at Burlington
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
 --------  ---------  ---------  ---------  --------
 23/05 PM     9.7        2.0       1.5      Minor
 24/05 AM     8.8        1.1       0.9       None
 24/06 PM     8.9        1.2       0.9       None
 25/06 AM     8.5        0.8       0.8       None
 25/06 PM     8.7        1.0       0.8       None

&&

$$



U.S. Dept. of Commerce
NOAA National Weather Service
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Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
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