Astronomical Low Tide in Pennsylvania
Every astronomical low tide event the National Weather Service has filed in Pennsylvania, year by year, with the most significant episodes. Unusually low water from tides and offshore wind that caused impacts.
The most significant on the map
The most significant astronomical low tide episodes in Pennsylvania.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The record
- Events
- 58
- Deaths
- 0
- Injuries
- 0
- Damage
- None recorded
Every year
The most significant
Ranked by deaths, injuries, damage and size together.
- Winter Weather and Astronomical Low Tide in Pennsylvania, March 1, 2019A fast moving weather system brought a short duration but fairly intense burst of snow to much of the mid-Atlantic. A widespread 2 to 4 inches of snow were observed, most of it within a 3 hour window.
- Astronomical Low Tide in Pennsylvania, February 5 to 6, 2007A persistent northwest flow started on February 4th and continued through February 6th.
- Astronomical Low Tide in Pennsylvania, January 28, 2014The very persistent and strong northwest flow that started during the afternoon of the 27th caused blowout tide conditions during the morning low tide cycle on the 28th along tidal sections of the Delaware River in Pennsylvania.
- Astronomical Low Tide in Pennsylvania, February 28, 2014The very persistent and strong west to northwest winds that started during the afternoon of the 27th coupled with the greater tidal fluctuations associated with the spring tides with the approaching new moon caused blowout tides during the morning low tide cycle on the 28th…
- Astronomical Low Tide in Pennsylvania, February 15 to 16, 2015The very persistent and strong to damaging northwest winds that started overnight on the 14th caused blowout tide conditions on the Delaware River and tidal sections of its tributaries during the three subsequent low tide cycles from the early morning of the 15th through the…
- Astronomical Low Tide in Pennsylvania, February 20 to 21, 2015The combination of persistent northwest winds and spring tides following the new moon caused blowout tides on the tidal Delaware River and its tidal tributaries with both low tide cycles on the 20th.
- Astronomical Low Tide in Pennsylvania, February 14, 2016A strong northwester wind created blowout tide conditions along the tidal sections of the Delaware River during the times of low tide late Saturday evening into early Sunday morning February 13th/February 14th.
- Astronomical Low Tide in Pennsylvania, December 15 to 16, 2016Strong northwesterly wind gusts of 40-50 mph in the wake of an arctic cold front resulted in Low Water/Blowout Tides along the tidal Delaware River during the overnight hours of December 15th into the 16th.
- Astronomical Low Tide in Pennsylvania, February 19, 2007A renewed strong northwest flow coupled with the astronomical spring (low) tides around the new moon caused blow-out tides around the times of the morning low tide on the 19th. The low tide In Philadelphia reached 2.53 feet below mean lower low water.
- Astronomical Low Tide in Pennsylvania, February 16 to 17, 2007A persistent northwest to west flow following the winter storm on February 13th and 14th culminated in blow-out tides around the times of low tide during the evening of the 16th and the morning of the 17th. The lowest tides occurred on the morning of the 17th.
- Astronomical Low Tide in Pennsylvania, March 6, 2007The continued strong west to northwest winds from the 5th into the 6th produced blow out tides during the morning and evening low tides on the 6th along the Delaware River. The lowest tides occurred during the morning low tide.
- Astronomical Low Tide in Pennsylvania, January 3, 2008On January 3rd, a persistent gale force northwest flow down Delaware Bay caused blow-out tides to occur during the early morning low tide along the Delaware River and tidal sections of its tributaries in Delaware and Philadelphia Counties.
- Astronomical Low Tide in Pennsylvania, February 10 to 12, 2008Persistent and strong west to northwest winds caused blowout tide conditions to occur at times of low tide along the Delaware River and tidal sections of its tributaries from the overnight low tide on the 10th through the overnight low tide on the 11th.
- Astronomical Low Tide in Pennsylvania, December 31, 2008The persistent and strong west to northwest offshore flow caused blowout tides to occur along the Delaware River with the evening low tide on the 31st. The low tide in Philadelphia reached 2.0 feet below mean lower low water.
- Astronomical Low Tide in Pennsylvania, December 29, 2009The combination of the strong northwest winds during the day on the 29th and the larger tide ranges associated with the approaching full moon spring tides produced blowout tides during the early evening low tide on the 29th.
- Astronomical Low Tide in Pennsylvania, January 9, 2009A potent pair of storms moved through the Mid Atlantic and Northeast during the 7th and into the 8th. One potent storm moved across the eastern Great Lakes region during the evening of the 7th, while a secondary potent storm developed along a front off the New Jersey coast.
- Astronomical Low Tide in Pennsylvania, December 28, 2010The persistent offshore flow caused by the departed winter storm and an approaching high pressure system caused blow out tides to occur at the time of low tide on the Delaware River and tidal sections of its tributaries overnight on the 27th into the early morning on the 28th.
- Astronomical Low Tide in Pennsylvania, January 2 to 4, 2010The strong and persistent offshore flow coupled with the recent full moon caused blow out tides at the times of low tide along tidal sections of the Delaware River and its tributaries from the evening of the 2nd into the overnight of the 3rd.
- Astronomical Low Tide in Pennsylvania, February 15, 2011The strong west to northwest winds that persisted overnight on the 14th caused blowout tides and low water problems around the times of low tide early Friday morning on the 15th along the Delaware River and tidal sections of its tributaries.
- Astronomical Low Tide in Pennsylvania, February 19, 2011The strong to high northwest winds that occurred throughout the day caused blowout tides to occur along tidal sections of the Delaware River and its tributaries during the evening low tide cycle on the 19th.
- Astronomical Low Tide in Pennsylvania, February 25 to 26, 2012Strong west winds circulating around an intense low pressure system moving through the Canadian Maritimes (it bottomed at 963 millibars at 1 p.m.
- Astronomical Low Tide in Pennsylvania, May 25, 2013The combination of a strong northwest flow around an anomalously strong (for late May) low pressure system slowly moving through the New England coastal waters and larger tidal spreads associated with the full moon caused pockets of blowout tides to occur during both low tide…
- Astronomical Low Tide in Pennsylvania, November 24, 2013The very persistent and strong northwest flow that started during the evening of the 23rd caused blowout tide conditions during the daytime low tide cycle on the 24th along tidal sections of the Delaware River in Pennsylvania.
- Astronomical Low Tide in Pennsylvania, January 7, 2014The very persistent and strong west winds that started during the day on the 6th caused blowout tide conditions during the daytime low tide cycle on the 7th along tidal sections of the Delaware River and its tributaries in Pennsylvania.
- Astronomical Low Tide in Pennsylvania, January 7 to 8, 2015The very persistent and strong northwest winds that started during the day on the 7th caused blowout tide conditions along the tidal Delaware River and its tributaries during the two subsequent low tide cycles during the night of the 7th and morning of the 8th.
More
Astronomical Low Tide everywhereEvery kind of event in Pennsylvania
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.