EXTRA-TROPICAL  STORM  SURGE
N A T I O N A L    O C E A N I C    A N D    A T M O S P H E R I C    A D M I N I S T R A T I O N

  • This website is considered EXPERIMENTAL, is supported on an 8x5 basis, and has no guarantee of availability.
  • The data located HERE are considered OPERATIONAL and are supported on a 24x7 basis.
About
Manual
Disclaimer
Manual
Datum
hat-on
mhhw-on
msl-on
mllw-on
Regions
Northeast
Mid-Atlantic
Southeast
Gulf
Northwest
Alaska
Gulf of Alaska
Status
Stations
Ketchikan, AK
Sitka, AK
Juneau, AK
Skagway, AK
Elfin Cove, AK
Yakutat, AK
Cordova, AK
Valdez, AK
Seward, AK
Seldovia, AK
Nikiski, AK
Anchorage, AK
Kodiak Island, AK
Alitak, AK
Sand Point, AK
King Cove, AK
Adak Island, AK
Atka, AK
Unalaska, AK
Surge List
Gulf of Alaska
#Seward, AK : 04/18/2026 12:22:44 GMT (units in feet MHHW)
#Date(GMT), Surge,   Tide,    Obs,   Fcst,   Anom, Comment
#------------------------------------------------------------
04/16 12Z,   0.70,  -4.99,  -5.88,  99.90,  -1.59,
04/16 13Z,   0.70,  -7.87,  -8.63,  99.90,  -1.46,
04/16 14Z,   0.60, -10.19, -11.05,  99.90,  -1.46,
04/16 15Z,   0.60, -11.35, -12.27,  99.90,  -1.52,  (min)
04/16 16Z,   0.60, -11.09, -11.99,  99.90,  -1.50,
04/16 17Z,   0.70,  -9.53, -10.49,  99.90,  -1.66,
04/16 18Z,   0.70,  -7.07,  -8.02,  99.90,  -1.65,
04/16 19Z,   0.70,  -4.34,  -5.28,  99.90,  -1.64,
04/16 20Z,   0.80,  -2.04,  -2.92,  99.90,  -1.68,
04/16 21Z,   0.80,  -0.76,  -1.64,  99.90,  -1.68,  (max)
04/16 22Z,   0.80,  -0.77,  -1.68,  99.90,  -1.71,
04/16 23Z,   0.80,  -1.98,  -2.91,  99.90,  -1.73,
04/17 00Z,   0.80,  -4.09,  -4.80,  99.90,  -1.51,
04/17 01Z,   0.80,  -6.58,  -7.23,  99.90,  -1.45,
04/17 02Z,   0.90,  -8.75,  -9.57,  99.90,  -1.72,
04/17 03Z,   0.90,  -9.93, -10.72,  99.90,  -1.69,  (min)
04/17 04Z,   0.90,  -9.74, -10.49,  99.90,  -1.65,
04/17 05Z,   0.90,  -8.22,  -8.99,  99.90,  -1.67,
04/17 06Z,   0.90,  -5.74,  -6.52,  99.90,  -1.68,
04/17 07Z,   0.90,  -2.90,  -3.63,  99.90,  -1.63,
04/17 08Z,   0.90,  -0.42,  -1.02,  99.90,  -1.50,
04/17 09Z,   0.90,   1.00,   0.46,  99.90,  -1.44,  (max)
04/17 10Z,   0.90,   0.99,   0.32,  99.90,  -1.57,
04/17 11Z,   0.80,  -0.47,  -1.09,  99.90,  -1.42,
04/17 12Z,   0.80,  -3.07,  -3.63,  99.90,  -1.36,
04/17 13Z,   0.80,  -6.29,  -6.93,  99.90,  -1.44,
04/17 14Z,   0.80,  -9.42, -10.16,  99.90,  -1.54,
04/17 15Z,   0.80, -11.66, -12.31,  99.90,  -1.45,
04/17 16Z,   0.70, -12.45, -13.16,  99.90,  -1.41,  (min)
04/17 17Z,   0.70, -11.67, -12.37,  99.90,  -1.40,
04/17 18Z,   0.70,  -9.56, -10.36,  99.90,  -1.50,
04/17 19Z,   0.80,  -6.68,  -7.35,  99.90,  -1.47,
04/17 20Z,   0.80,  -3.76,  -4.53,  99.90,  -1.57,
04/17 21Z,   0.80,  -1.52,  -2.25,  99.90,  -1.53,
04/17 22Z,   0.80,  -0.50,  -1.34,  99.90,  -1.64,  (max)
04/17 23Z,   0.70,  -0.84,  -1.65,  99.90,  -1.51,
04/18 00Z,   0.80,  -2.37,  -3.04,  99.90,  -1.47,
04/18 01Z,   0.80,  -4.67,  -5.33,  99.90,  -1.46,
04/18 02Z,   0.80,  -7.14,  -7.91,  99.90,  -1.57,
04/18 03Z,   0.70,  -9.03,  -9.72,  99.90,  -1.39,
04/18 04Z,   0.70,  -9.72, -10.33,  99.90,  -1.31,  (min)
04/18 05Z,   0.70,  -8.97,  -9.44,  99.90,  -1.17,
04/18 06Z,   0.70,  -6.94,  -7.50,  99.90,  -1.26,
04/18 07Z,   0.70,  -4.15,  -4.66,  99.90,  -1.21,
04/18 08Z,   0.80,  -1.29,  -1.79,  99.90,  -1.30,
04/18 09Z,   0.70,   0.89,   0.35,  99.90,  -1.24,
04/18 10Z,   0.80,   1.77,   1.22,  99.90,  -1.35,  (max)
04/18 11Z,   0.80,   1.10,   0.39,  99.90,  -1.51,
04/18 12Z,   0.80,  -1.00,  -1.76,  99.90,  -1.56,
#------------------------------------------------------------
#Date(GMT), Surge,   Tide,    Obs,   Fcst,   Anom, Comment
#------------------------------------------------------------
04/18 13Z,   0.80,  -4.11,  99.90,  -4.88,  -1.57,
04/18 14Z,   0.80,  -7.62,  99.90,  -8.40,  -1.58,
04/18 15Z,   0.70, -10.74,  99.90, -11.62,  -1.59,
04/18 16Z,   0.70, -12.69,  99.90, -13.59,  -1.59,
04/18 17Z,   0.70, -13.02,  99.90, -13.93,  -1.60,  (min)
04/18 18Z,   0.70, -11.74,  99.90, -12.65,  -1.61,
04/18 19Z,   0.70,  -9.24,  99.90, -10.16,  -1.62,
04/18 20Z,   0.70,  -6.17,  99.90,  -7.10,  -1.62,
04/18 21Z,   0.70,  -3.29,  99.90,  -4.22,  -1.63,
04/18 22Z,   0.80,  -1.29,  99.90,  -2.13,  -1.64,
04/18 23Z,   0.80,  -0.60,  99.90,  -1.44,  -1.65,  (max)
04/19 00Z,   0.80,  -1.24,  99.90,  -2.10,  -1.66,
04/19 01Z,   0.80,  -2.95,  99.90,  -3.81,  -1.66,
04/19 02Z,   0.80,  -5.26,  99.90,  -6.11,  -1.66,
04/19 03Z,   0.90,  -7.51,  99.90,  -8.27,  -1.66,
04/19 04Z,   0.80,  -8.99,  99.90,  -9.84,  -1.66,
04/19 05Z,   0.80,  -9.16,  99.90, -10.01,  -1.66,  (min)
04/19 06Z,   0.80,  -7.91,  99.90,  -8.77,  -1.66,
04/19 07Z,   1.00,  -5.57,  99.90,  -6.22,  -1.66,
04/19 08Z,   0.90,  -2.71,  99.90,  -3.46,  -1.66,
04/19 09Z,   1.00,  -0.06,  99.90,  -0.72,  -1.66,
04/19 10Z,   0.90,   1.66,  99.90,   0.91,  -1.66,
04/19 11Z,   1.00,   1.96,  99.90,   1.31,  -1.66,  (max)
04/19 12Z,   1.00,   0.72,  99.90,   0.07,  -1.66,
04/19 13Z,   1.00,  -1.82,  99.90,  -2.48,  -1.66,
04/19 14Z,   1.00,  -5.18,  99.90,  -5.84,  -1.66,
04/19 15Z,   1.00,  -8.70,  99.90,  -9.36,  -1.66,
04/19 16Z,   1.00, -11.59,  99.90, -12.24,  -1.66,
04/19 17Z,   1.00, -13.14,  99.90, -13.79,  -1.66,  (min)
04/19 18Z,   1.00, -13.03,  99.90, -13.68,  -1.66,
04/19 19Z,   1.10, -11.40,  99.90, -11.95,  -1.66,
04/19 20Z,   1.20,  -8.74,  99.90,  -9.20,  -1.66,
04/19 21Z,   1.10,  -5.73,  99.90,  -6.28,  -1.66,
04/19 22Z,   1.20,  -3.08,  99.90,  -3.54,  -1.66,
04/19 23Z,   1.20,  -1.42,  99.90,  -1.87,  -1.66,
04/20 00Z,   1.20,  -1.03,  99.90,  -1.49,  -1.66,  (max)
04/20 01Z,   1.10,  -1.87,  99.90,  -2.42,  -1.66,
04/20 02Z,   1.10,  -3.59,  99.90,  -4.15,  -1.66,
04/20 03Z,   1.10,  -5.72,  99.90,  -6.28,  -1.66,
04/20 04Z,   1.10,  -7.62,  99.90,  -8.17,  -1.66,
04/20 05Z,   1.10,  -8.63,  99.90,  -9.18,  -1.66,  (min)
04/20 06Z,   1.20,  -8.34,  99.90,  -8.80,  -1.66,
04/20 07Z,   1.30,  -6.79,  99.90,  -7.14,  -1.66,
04/20 08Z,   1.30,  -4.36,  99.90,  -4.72,  -1.66,
04/20 09Z,   1.20,  -1.68,  99.90,  -2.13,  -1.66,
04/20 10Z,   1.30,   0.58,  99.90,   0.23,  -1.66,
04/20 11Z,   1.20,   1.80,  99.90,   1.35,  -1.66,  (max)
04/20 12Z,   1.20,   1.61,  99.90,   1.16,  -1.66,
04/20 13Z,   1.10,   0.00,  99.90,  -0.55,  -1.66,
04/20 14Z,   1.10,  -2.72,  99.90,  -3.27,  -1.66,
04/20 15Z,   1.00,  -6.05,  99.90,  -6.70,  -1.66,
04/20 16Z,   1.00,  -9.34,  99.90,  -9.99,  -1.66,
04/20 17Z,   1.00, -11.85,  99.90, -12.51,  -1.66,
04/20 18Z,   1.00, -13.00,  99.90, -13.65,  -1.66,  (min)
04/20 19Z,   1.00, -12.57,  99.90, -13.23,  -1.66,
04/20 20Z,   1.00, -10.81,  99.90, -11.47,  -1.66,
04/20 21Z,   1.00,  -8.24,  99.90,  -8.90,  -1.66,
04/20 22Z,   1.00,  -5.49,  99.90,  -6.15,  -1.66,
04/20 23Z,   1.10,  -3.20,  99.90,  -3.76,  -1.66,
04/21 00Z,   1.00,  -1.87,  99.90,  -2.53,  -1.66,
04/21 01Z,   0.90,  -1.69,  99.90,  -2.45,  -1.66,  (max)
04/21 02Z,   0.80,  -2.55,  99.90,  -3.41,  -1.66,
04/21 03Z,   0.90,  -4.12,  99.90,  -4.87,  -1.66,
04/21 04Z,   1.00,  -5.94,  99.90,  -6.59,  -1.66,
04/21 05Z,   0.90,  -7.43,  99.90,  -8.18,  -1.66,
04/21 06Z,   0.90,  -8.03,  99.90,  -8.78,  -1.66,  (min)
04/21 07Z,   0.90,  -7.45,  99.90,  -8.21,  -1.66,
04/21 08Z,   1.00,  -5.82,  99.90,  -6.48,  -1.66,
04/21 09Z,   0.90,  -3.56,  99.90,  -4.32,  -1.66,
04/21 10Z,   0.90,  -1.23,  99.90,  -1.99,  -1.66,
04/21 11Z,   0.90,   0.58,  99.90,  -0.18,  -1.66,
04/21 12Z,   1.00,   1.36,  99.90,   0.71,  -1.66,  (max)
04/21 13Z,   0.90,   0.86,  99.90,   0.11,  -1.66,
04/21 14Z,   0.90,  -0.85,  99.90,  -1.61,  -1.66,
04/21 15Z,   0.80,  -3.48,  99.90,  -4.33,  -1.66,
04/21 16Z,   0.80,  -6.54,  99.90,  -7.40,  -1.66,
04/21 17Z,   0.90,  -9.46,  99.90, -10.21,  -1.66,
04/21 18Z,   0.90, -11.57,  99.90, -12.33,  -1.66,
04/21 19Z,   0.90, -12.40,  99.90, -13.16,  -1.66,  (min)
04/21 20Z,   0.90, -11.85,  99.90, -12.61,  -1.66,
04/21 21Z,   0.90, -10.19,  99.90, -10.95,  -1.66,
04/21 22Z,   0.90,  -7.90,  99.90,  -8.66,  -1.66,
04/21 23Z,   0.90,  -5.52,  99.90,  -6.28,  -1.66,
04/22 00Z,   0.90,  -3.59,  99.90,  -4.35,  -1.66,