EXTRA-TROPICAL  STORM  SURGE
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Manual
Datum
hat-on
mhhw-on
msl-on
mllw-on
Regions
Northeast
Mid-Atlantic
Southeast
Gulf
Northwest
Alaska
Gulf of Alaska
Status
Stations
Eastport, ME
Bar Harbor, ME
Portland, ME
Portsmouth, ME
Boston, MA
Buzzards Bay MA
Woods Hole, MA
Nantucket, MA
Providence, RI
Newport, RI
Block Island, RI
Montauk Point NY
New London, CT
Bridgeport, CT
Port Jefferson NY
Kings Pnt, NY
The Battery, NY
Bergen Pnt, NY
Sandy Hook, NJ
Atlantic City, NJ
Cape May, NJ
Philadelphia, PA
Reedy Pnt, DE
Lewes, DE
Surge List
East Coast
#Philadelphia, PA : 04/21/2026 22:21:11 GMT (units in feet MLLW)
#Date(GMT), Surge,   Tide,    Obs,   Fcst,   Anom, Comment
#------------------------------------------------------------
04/20 06Z,   0.60,   5.83,   6.05,  99.90,  -0.38,
04/20 07Z,   0.70,   6.89,   7.13,  99.90,  -0.46,
04/20 08Z,   0.70,   7.37,   7.78,  99.90,  -0.29,  (max)
04/20 09Z,   0.70,   7.13,   7.40,  99.90,  -0.43,
04/20 10Z,   0.70,   6.18,   6.19,  99.90,  -0.69,
04/20 11Z,   0.70,   5.06,   4.96,  99.90,  -0.80,
04/20 12Z,   0.70,   3.99,   3.84,  99.90,  -0.85,
04/20 13Z,   0.70,   2.90,   2.66,  99.90,  -0.94,
04/20 14Z,   0.70,   1.75,   1.55,  99.90,  -0.90,
04/20 15Z,   0.70,   0.74,   0.59,  99.90,  -0.85,
04/20 16Z,   0.70,   0.65,   0.07,  99.90,  -1.28,  (min)
04/20 17Z,   0.60,   1.94,   2.12,  99.90,  -0.42,
04/20 18Z,   0.50,   3.70,   3.79,  99.90,  -0.41,
04/20 19Z,   0.40,   4.97,   4.98,  99.90,  -0.39,
04/20 20Z,   0.40,   5.78,   5.79,  99.90,  -0.39,
04/20 21Z,   0.40,   6.08,   5.98,  99.90,  -0.50,  (max)
04/20 22Z,   0.40,   5.57,   4.97,  99.90,  -1.00,
04/20 23Z,   0.30,   4.59,   3.80,  99.90,  -1.09,
04/21 00Z,   0.20,   3.58,   2.74,  99.90,  -1.04,
04/21 01Z,   0.20,   2.62,   1.63,  99.90,  -1.19,
04/21 02Z,   0.20,   1.74,   0.53,  99.90,  -1.41,
04/21 03Z,   0.10,   1.00,  -0.43,  99.90,  -1.53,  (min)
04/21 04Z,   0.10,   0.92,  -0.30,  99.90,  -1.32,
04/21 05Z,   0.10,   2.16,   2.12,  99.90,  -0.14,
04/21 06Z,   0.00,   4.23,   3.80,  99.90,  -0.43,
04/21 07Z,   0.00,   5.90,   5.28,  99.90,  -0.62,
04/21 08Z,   0.00,   6.84,   6.39,  99.90,  -0.45,
04/21 09Z,   0.00,   7.24,   7.15,  99.90,  -0.09,  (max)
04/21 10Z,   0.00,   6.93,   6.83,  99.90,  -0.10,
04/21 11Z,   0.00,   6.01,   5.61,  99.90,  -0.40,
04/21 12Z,   0.10,   4.97,   4.46,  99.90,  -0.61,
04/21 13Z,   0.10,   3.96,   3.37,  99.90,  -0.69,
04/21 14Z,   0.10,   2.89,   2.27,  99.90,  -0.72,
04/21 15Z,   0.10,   1.73,   1.19,  99.90,  -0.64,
04/21 16Z,   0.10,   0.75,   0.32,  99.90,  -0.53,  (min)
04/21 17Z,   0.10,   0.79,   0.37,  99.90,  -0.52,
04/21 18Z,   0.10,   2.12,   2.67,  99.90,   0.45,
04/21 19Z,   0.10,   3.75,   4.22,  99.90,   0.37,
04/21 20Z,   0.10,   4.90,   5.41,  99.90,   0.41,
04/21 21Z,   0.20,   5.69,   6.17,  99.90,   0.28,
04/21 22Z,   0.20,   5.95,   6.45,  99.90,   0.30,  (max)
#------------------------------------------------------------
#Date(GMT), Surge,   Tide,    Obs,   Fcst,   Anom, Comment
#------------------------------------------------------------
04/21 23Z,   0.20,   5.44,  99.90,   5.87,   0.23,
04/22 00Z,   0.20,   4.51,  99.90,   4.87,   0.16,
04/22 01Z,   0.20,   3.55,  99.90,   3.84,   0.09,
04/22 02Z,   0.20,   2.62,  99.90,   2.84,   0.02,
04/22 03Z,   0.30,   1.73,  99.90,   1.99,  -0.05,
04/22 04Z,   0.30,   1.01,  99.90,   1.20,  -0.12,  (min)
04/22 05Z,   0.40,   1.03,  99.90,   1.24,  -0.19,
04/22 06Z,   0.40,   2.35,  99.90,   2.50,  -0.26,
04/22 07Z,   0.50,   4.32,  99.90,   4.50,  -0.32,
04/22 08Z,   0.50,   5.79,  99.90,   5.90,  -0.39,
04/22 09Z,   0.60,   6.65,  99.90,   6.78,  -0.46,
04/22 10Z,   0.60,   7.04,  99.90,   7.11,  -0.53,  (max)
04/22 11Z,   0.60,   6.73,  99.90,   6.80,  -0.53,
04/22 12Z,   0.70,   5.88,  99.90,   6.04,  -0.53,
04/22 13Z,   0.70,   4.93,  99.90,   5.10,  -0.53,
04/22 14Z,   0.70,   3.98,  99.90,   4.14,  -0.53,
04/22 15Z,   0.70,   2.91,  99.90,   3.08,  -0.53,
04/22 16Z,   0.70,   1.72,  99.90,   1.89,  -0.53,
04/22 17Z,   0.70,   0.77,  99.90,   0.94,  -0.53,  (min)
04/22 18Z,   0.60,   0.91,  99.90,   0.98,  -0.53,
04/22 19Z,   0.60,   2.24,  99.90,   2.30,  -0.53,
04/22 20Z,   0.50,   3.71,  99.90,   3.68,  -0.53,
04/22 21Z,   0.50,   4.79,  99.90,   4.75,  -0.53,
04/22 22Z,   0.40,   5.61,  99.90,   5.47,  -0.53,
04/22 23Z,   0.40,   5.89,  99.90,   5.76,  -0.53,  (max)
04/23 00Z,   0.30,   5.41,  99.90,   5.18,  -0.53,
04/23 01Z,   0.30,   4.55,  99.90,   4.32,  -0.53,
04/23 02Z,   0.30,   3.63,  99.90,   3.39,  -0.53,
04/23 03Z,   0.30,   2.70,  99.90,   2.46,  -0.53,
04/23 04Z,   0.30,   1.79,  99.90,   1.56,  -0.53,
04/23 05Z,   0.30,   1.05,  99.90,   0.81,  -0.53,  (min)
04/23 06Z,   0.30,   1.11,  99.90,   0.88,  -0.53,
04/23 07Z,   0.40,   2.44,  99.90,   2.31,  -0.53,
04/23 08Z,   0.40,   4.24,  99.90,   4.11,  -0.53,
04/23 09Z,   0.40,   5.54,  99.90,   5.41,  -0.53,
04/23 10Z,   0.40,   6.38,  99.90,   6.25,  -0.53,
04/23 11Z,   0.40,   6.83,  99.90,   6.70,  -0.53,  (max)
04/23 12Z,   0.40,   6.57,  99.90,   6.44,  -0.53,
04/23 13Z,   0.40,   5.81,  99.90,   5.67,  -0.53,
04/23 14Z,   0.50,   4.95,  99.90,   4.91,  -0.53,
04/23 15Z,   0.50,   4.02,  99.90,   3.98,  -0.53,
04/23 16Z,   0.50,   2.94,  99.90,   2.91,  -0.53,
04/23 17Z,   0.50,   1.71,  99.90,   1.68,  -0.53,
04/23 18Z,   0.50,   0.78,  99.90,   0.75,  -0.53,  (min)
04/23 19Z,   0.50,   0.99,  99.90,   0.95,  -0.53,
04/23 20Z,   0.60,   2.26,  99.90,   2.33,  -0.53,
04/23 21Z,   0.60,   3.61,  99.90,   3.68,  -0.53,
04/23 22Z,   0.60,   4.68,  99.90,   4.75,  -0.53,
04/23 23Z,   0.60,   5.59,  99.90,   5.66,  -0.53,
04/24 00Z,   0.50,   5.93,  99.90,   5.90,  -0.53,  (max)
04/24 01Z,   0.50,   5.50,  99.90,   5.46,  -0.53,
04/24 02Z,   0.50,   4.69,  99.90,   4.66,  -0.53,
04/24 03Z,   0.50,   3.79,  99.90,   3.76,  -0.53,
04/24 04Z,   0.50,   2.84,  99.90,   2.81,  -0.53,
04/24 05Z,   0.50,   1.88,  99.90,   1.85,  -0.53,
04/24 06Z,   0.50,   1.08,  99.90,   1.05,  -0.53,  (min)
04/24 07Z,   0.50,   1.14,  99.90,   1.11,  -0.53,
04/24 08Z,   0.50,   2.41,  99.90,   2.38,  -0.53,
04/24 09Z,   0.50,   4.03,  99.90,   3.99,  -0.53,
04/24 10Z,   0.50,   5.21,  99.90,   5.18,  -0.53,
04/24 11Z,   0.50,   6.12,  99.90,   6.09,  -0.53,
04/24 12Z,   0.50,   6.66,  99.90,   6.63,  -0.53,  (max)
04/24 13Z,   0.50,   6.47,  99.90,   6.43,  -0.53,
04/24 14Z,   0.50,   5.79,  99.90,   5.76,  -0.53,
04/24 15Z,   0.50,   4.98,  99.90,   4.95,  -0.53,
04/24 16Z,   0.60,   4.06,  99.90,   4.13,  -0.53,
04/24 17Z,   0.60,   2.95,  99.90,   3.02,  -0.53,
04/24 18Z,   0.60,   1.66,  99.90,   1.73,  -0.53,
04/24 19Z,   0.60,   0.74,  99.90,   0.81,  -0.53,  (min)
04/24 20Z,   0.70,   1.00,  99.90,   1.17,  -0.53,
04/24 21Z,   0.70,   2.23,  99.90,   2.40,  -0.53,
04/24 22Z,   0.70,   3.50,  99.90,   3.67,  -0.53,
04/24 23Z,   0.70,   4.64,  99.90,   4.81,  -0.53,
04/25 00Z,   0.70,   5.69,  99.90,   5.85,  -0.53,
04/25 01Z,   0.70,   6.08,  99.90,   6.25,  -0.53,  (max)
04/25 02Z,   0.70,   5.68,  99.90,   5.85,  -0.53,
04/25 03Z,   0.80,   4.91,  99.90,   5.18,  -0.53,
04/25 04Z,   0.80,   4.01,  99.90,   4.27,  -0.53,
04/25 05Z,   0.80,   3.02,  99.90,   3.29,  -0.53,
04/25 06Z,   0.80,   1.97,  99.90,   2.23,  -0.53,
04/25 07Z,   0.80,   1.08,  99.90,   1.34,  -0.53,  (min)
04/25 08Z,   0.80,   1.11,  99.90,   1.38,  -0.53,
04/25 09Z,   0.80,   2.30,  99.90,   2.57,  -0.53,
04/25 10Z,   0.80,   3.75,  99.90,   4.01,  -0.53,
04/25 11Z,   0.80,   4.90,  99.90,   5.17,  -0.53,
04/25 12Z,   0.80,   5.93,  99.90,   6.20,  -0.53,
04/25 13Z,  99.90,   6.56,  99.90,  99.90,  -0.53,
04/25 14Z,  99.90,   6.42,  99.90,  99.90,  -0.53,
04/25 15Z,  99.90,   5.80,  99.90,  99.90,  -0.53,
04/25 16Z,  99.90,   5.01,  99.90,  99.90,  -0.53,
04/25 17Z,  99.90,   4.06,  99.90,  99.90,  -0.53,
04/25 18Z,  99.90,   2.90,  99.90,  99.90,  -0.53,