Station Name: Delaware River at Fort Mifflin at Philadelphia, PA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 0 feet / 0 meters

Nearest Address:
Fort Mifflin Road
Philadelphia, PA 19153
Philadelphia County

GPS Coordinates: 39.8792798, -75.20268029

Nearby Water Temperatures

Coastal Flood Watch issued October 9 at 5:14AM EDT until October 13 at 9:00PM EDT by NWS Mount Holly NJ

Effective: Thu October 9, 2025, 5:14 AM
Expires: Thu October 9, 2025, 7:00 PM

* WHAT...One to two feet of inundation above ground level possible in low-lying areas near shorelines and tidal waterways. * WHERE...In Delaware, New Castle. In New Jersey, Salem. * WHEN...From Sunday afternoon through Monday evening. * IMPACTS...At this level, widespread roadway flooding occurs along tidal waterways. Some roads become impassable. Minor damage to vulnerable structures may begin to occur. * ADDITIONAL DETAILS...A strong coastal storm will impact the region Sunday through Monday. Moderate coastal flood impacts are possible. Interests along Delaware Bay and its tidal tributaries should remain alert for forecast updates regarding this potentially significant coastal flood event.

A Coastal Flood Watch means that conditions favorable for flooding are expected to develop. Be prepared to begin taking appropriate action to protect life and property. Follow the recommendations of local emergency management officials. Be sure to check the latest forecast from time to time in case a warning is issued or any new information becomes available. Visit the National Water Prediction Service at https://water.noaa.gov/wfo/phi for additional water level and flood impact information for your local tide gauge.

Coastal Flood Advisory issued October 9 at 5:14AM EDT until October 9 at 3:00PM EDT by NWS Mount Holly NJ

Effective: Thu October 9, 2025, 5:14 AM
Expires: Thu October 9, 2025, 7:00 PM

* WHAT...For the Coastal Flood Advisory, up to one half foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways. For the Coastal Flood Watch, one to two feet of inundation above ground level possible in low- lying areas near shorelines and tidal waterways. * WHERE...Ocean, Coastal Ocean and Southeastern Burlington. * WHEN...For the Coastal Flood Advisory, until 3 PM EDT this afternoon. For the Coastal Flood Watch, from Sunday morning through Monday evening. * IMPACTS...At this level, widespread roadway flooding occurs in coastal and bayside communities and along inland tidal waterways. Many roads become impassable. Some damage to vulnerable structures may begin to occur. * ADDITIONAL DETAILS...A strong coastal storm will impact the region Sunday through Monday. Moderate to potentially major coastal flood impacts are possible. Significant beach erosion is possible. Interests along the Atlantic coast, back bays, and tidal waterways should remain alert for forecast updates regarding this potentially significant coastal flood event.

A Coastal Flood Watch means that conditions favorable for flooding are expected to develop. Be prepared to begin taking appropriate action to protect life and property. Follow the recommendations of local emergency management officials. Be sure to check the latest forecast from time to time in case a warning is issued or any new information becomes available. Visit the National Water Prediction Service at https://water.noaa.gov/wfo/phi for additional water level and flood impact information for your local tide gauge.

Coastal Flood Watch issued October 9 at 5:14AM EDT until October 13 at 8:00PM EDT by NWS Mount Holly NJ

Effective: Thu October 9, 2025, 5:14 AM
Expires: Thu October 9, 2025, 7:00 PM

* WHAT...For the Coastal Flood Advisory, up to one half foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways. For the Coastal Flood Watch, one to two feet of inundation above ground level possible in low- lying areas near shorelines and tidal waterways. * WHERE...Ocean, Coastal Ocean and Southeastern Burlington. * WHEN...For the Coastal Flood Advisory, until 3 PM EDT this afternoon. For the Coastal Flood Watch, from Sunday morning through Monday evening. * IMPACTS...At this level, widespread roadway flooding occurs in coastal and bayside communities and along inland tidal waterways. Many roads become impassable. Some damage to vulnerable structures may begin to occur. * ADDITIONAL DETAILS...A strong coastal storm will impact the region Sunday through Monday. Moderate to potentially major coastal flood impacts are possible. Significant beach erosion is possible. Interests along the Atlantic coast, back bays, and tidal waterways should remain alert for forecast updates regarding this potentially significant coastal flood event.

A Coastal Flood Watch means that conditions favorable for flooding are expected to develop. Be prepared to begin taking appropriate action to protect life and property. Follow the recommendations of local emergency management officials. Be sure to check the latest forecast from time to time in case a warning is issued or any new information becomes available. Visit the National Water Prediction Service at https://water.noaa.gov/wfo/phi for additional water level and flood impact information for your local tide gauge.

Frost Advisory issued October 9 at 1:56AM EDT until October 10 at 9:00AM EDT by NWS Mount Holly NJ

Effective: Thu October 9, 2025, 1:56 AM
Expires: Thu October 9, 2025, 5:00 PM

* WHAT...Temperatures in the low to mid 30s will result in frost formation. * WHERE...Portions of central, northern, and northwest New Jersey and east central and southeast Pennsylvania. * WHEN...From 2 AM to 9 AM EDT Friday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.

Coastal Flood Advisory issued October 9 at 5:14AM EDT until October 10 at 3:00PM EDT by NWS Mount Holly NJ

Effective: Thu October 9, 2025, 5:14 AM
Expires: Thu October 9, 2025, 7:00 PM

* WHAT...For the Coastal Flood Advisory, up to one foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways. For the Coastal Flood Watch, one to two feet of inundation above ground level possible in low- lying areas near shorelines and tidal waterways. * WHERE...Cumberland. * WHEN...For the Coastal Flood Advisory, until 3 PM EDT Friday. For the Coastal Flood Watch, from Sunday morning through Monday evening. * IMPACTS...At this level, widespread roadway flooding occurs in coastal and bayside communities and along inland tidal waterways. Many roads become impassable. Some damage to vulnerable structures may begin to occur. * ADDITIONAL DETAILS...A strong coastal storm will impact the region Sunday through Monday. Moderate to potentially major coastal flood impacts are possible. Interests along Delaware Bay and its tidal tributaries should remain alert for forecast updates regarding this potentially significant coastal flood event.

A Coastal Flood Watch means that conditions favorable for flooding are expected to develop. Be prepared to begin taking appropriate action to protect life and property. Follow the recommendations of local emergency management officials. Be sure to check the latest forecast from time to time in case a warning is issued or any new information becomes available. Visit the National Water Prediction Service at https://water.noaa.gov/wfo/phi for additional water level and flood impact information for your local tide gauge.

Coastal Flood Watch issued October 9 at 5:14AM EDT until October 13 at 8:00PM EDT by NWS Mount Holly NJ

Effective: Thu October 9, 2025, 5:14 AM
Expires: Thu October 9, 2025, 7:00 PM

* WHAT...For the Coastal Flood Advisory, up to one foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways. For the Coastal Flood Watch, one to two feet of inundation above ground level possible in low- lying areas near shorelines and tidal waterways. * WHERE...Cumberland. * WHEN...For the Coastal Flood Advisory, until 3 PM EDT Friday. For the Coastal Flood Watch, from Sunday morning through Monday evening. * IMPACTS...At this level, widespread roadway flooding occurs in coastal and bayside communities and along inland tidal waterways. Many roads become impassable. Some damage to vulnerable structures may begin to occur. * ADDITIONAL DETAILS...A strong coastal storm will impact the region Sunday through Monday. Moderate to potentially major coastal flood impacts are possible. Interests along Delaware Bay and its tidal tributaries should remain alert for forecast updates regarding this potentially significant coastal flood event.

A Coastal Flood Watch means that conditions favorable for flooding are expected to develop. Be prepared to begin taking appropriate action to protect life and property. Follow the recommendations of local emergency management officials. Be sure to check the latest forecast from time to time in case a warning is issued or any new information becomes available. Visit the National Water Prediction Service at https://water.noaa.gov/wfo/phi for additional water level and flood impact information for your local tide gauge.

Coastal Flood Advisory issued October 9 at 5:14AM EDT until October 10 at 3:00PM EDT by NWS Mount Holly NJ

Effective: Thu October 9, 2025, 5:14 AM
Expires: Thu October 9, 2025, 7:00 PM

* WHAT...For the Coastal Flood Advisory, up to one foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways. For the Coastal Flood Watch, one to two feet of inundation above ground level possible in low- lying areas near shorelines and tidal waterways. * WHERE...Atlantic, Cape May, Atlantic Coastal Cape May and Coastal Atlantic. * WHEN...For the Coastal Flood Advisory, until 3 PM EDT Friday. For the Coastal Flood Watch, from Sunday morning through Monday evening. * IMPACTS...At this level, widespread roadway flooding occurs in coastal and bayside communities and along inland tidal waterways. Many roads become impassable. Some damage to vulnerable structures may begin to occur. * ADDITIONAL DETAILS...A strong coastal storm will impact the region Sunday through Monday. Moderate to potentially major coastal flood impacts are possible. Significant beach erosion is possible. Interests along the Atlantic coast, back bays, and tidal waterways should remain alert for forecast updates regarding this potentially significant coastal flood event.

A Coastal Flood Watch means that conditions favorable for flooding are expected to develop. Be prepared to begin taking appropriate action to protect life and property. Follow the recommendations of local emergency management officials. Be sure to check the latest forecast from time to time in case a warning is issued or any new information becomes available. Visit the National Water Prediction Service at https://water.noaa.gov/wfo/phi for additional water level and flood impact information for your local tide gauge.

Coastal Flood Watch issued October 9 at 5:14AM EDT until October 13 at 8:00PM EDT by NWS Mount Holly NJ

Effective: Thu October 9, 2025, 5:14 AM
Expires: Thu October 9, 2025, 7:00 PM

* WHAT...For the Coastal Flood Advisory, up to one foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways. For the Coastal Flood Watch, one to two feet of inundation above ground level possible in low- lying areas near shorelines and tidal waterways. * WHERE...Atlantic, Cape May, Atlantic Coastal Cape May and Coastal Atlantic. * WHEN...For the Coastal Flood Advisory, until 3 PM EDT Friday. For the Coastal Flood Watch, from Sunday morning through Monday evening. * IMPACTS...At this level, widespread roadway flooding occurs in coastal and bayside communities and along inland tidal waterways. Many roads become impassable. Some damage to vulnerable structures may begin to occur. * ADDITIONAL DETAILS...A strong coastal storm will impact the region Sunday through Monday. Moderate to potentially major coastal flood impacts are possible. Significant beach erosion is possible. Interests along the Atlantic coast, back bays, and tidal waterways should remain alert for forecast updates regarding this potentially significant coastal flood event.

A Coastal Flood Watch means that conditions favorable for flooding are expected to develop. Be prepared to begin taking appropriate action to protect life and property. Follow the recommendations of local emergency management officials. Be sure to check the latest forecast from time to time in case a warning is issued or any new information becomes available. Visit the National Water Prediction Service at https://water.noaa.gov/wfo/phi for additional water level and flood impact information for your local tide gauge.