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
#Unalaska, AK : 04/12/2026 00:21:48 GMT (units in feet MLLW)
#Date(GMT), Surge,   Tide,    Obs,   Fcst,   Anom, Comment
#------------------------------------------------------------
04/10 06Z,  -0.30,   0.88,   0.49,  99.90,  -0.09,
04/10 07Z,  -0.30,   1.58,   1.15,  99.90,  -0.13,
04/10 08Z,  -0.30,   2.27,   1.72,  99.90,  -0.25,
04/10 09Z,  -0.30,   2.82,   2.27,  99.90,  -0.25,
04/10 10Z,  -0.30,   3.18,   2.61,  99.90,  -0.27,
04/10 11Z,  -0.40,   3.31,   2.70,  99.90,  -0.21,  (max)
04/10 12Z,  -0.40,   3.24,   2.58,  99.90,  -0.26,
04/10 13Z,  -0.40,   3.05,   2.45,  99.90,  -0.20,
04/10 14Z,  -0.40,   2.82,   2.16,  99.90,  -0.26,
04/10 15Z,  -0.40,   2.65,   2.02,  99.90,  -0.23,
04/10 16Z,  -0.40,   2.57,   1.97,  99.90,  -0.20,
04/10 17Z,  -0.40,   2.61,   1.93,  99.90,  -0.28,  (min)
04/10 18Z,  -0.40,   2.72,   2.02,  99.90,  -0.30,
04/10 19Z,  -0.40,   2.83,   2.10,  99.90,  -0.33,
04/10 20Z,  -0.40,   2.85,   2.15,  99.90,  -0.30,  (max)
04/10 21Z,  -0.40,   2.72,   1.97,  99.90,  -0.35,
04/10 22Z,  -0.40,   2.42,   1.70,  99.90,  -0.32,
04/10 23Z,  -0.50,   1.94,   1.24,  99.90,  -0.20,
04/11 00Z,  -0.40,   1.36,   0.73,  99.90,  -0.23,
04/11 01Z,  -0.40,   0.76,   0.15,  99.90,  -0.21,
04/11 02Z,  -0.40,   0.25,  -0.37,  99.90,  -0.22,
04/11 03Z,  -0.50,  -0.07,  -0.67,  99.90,  -0.10,  (min)
04/11 04Z,  -0.50,  -0.14,  -0.63,  99.90,   0.01,
04/11 05Z,  -0.50,   0.07,  -0.35,  99.90,   0.08,
04/11 06Z,  -0.50,   0.53,   0.12,  99.90,   0.09,
04/11 07Z,  -0.50,   1.15,   0.70,  99.90,   0.05,
04/11 08Z,  -0.50,   1.82,   1.42,  99.90,   0.10,
04/11 09Z,  -0.50,   2.43,   2.02,  99.90,   0.09,
04/11 10Z,  -0.40,   2.87,   2.48,  99.90,   0.01,
04/11 11Z,  -0.40,   3.11,   2.62,  99.90,  -0.09,
04/11 12Z,  -0.50,   3.12,   2.64,  99.90,   0.02,  (max)
04/11 13Z,  -0.50,   2.98,   2.42,  99.90,  -0.06,
04/11 14Z,  -0.50,   2.75,   2.19,  99.90,  -0.06,
04/11 15Z,  -0.50,   2.54,   2.03,  99.90,  -0.01,
04/11 16Z,  -0.50,   2.41,   1.85,  99.90,  -0.06,  (min)
04/11 17Z,  -0.50,   2.41,   1.92,  99.90,   0.01,
04/11 18Z,  -0.50,   2.51,   1.96,  99.90,  -0.05,
04/11 19Z,  -0.50,   2.67,   2.13,  99.90,  -0.04,
04/11 20Z,  -0.50,   2.79,   2.21,  99.90,  -0.08,  (max)
04/11 21Z,  -0.50,   2.79,   2.19,  99.90,  -0.10,
04/11 22Z,  -0.50,   2.62,   1.92,  99.90,  -0.20,
04/11 23Z,  -0.50,   2.27,   1.62,  99.90,  -0.15,
04/12 00Z,  -0.50,   1.77,   1.20,  99.90,  -0.07,
#------------------------------------------------------------
#Date(GMT), Surge,   Tide,    Obs,   Fcst,   Anom, Comment
#------------------------------------------------------------
04/12 01Z,  -0.50,   1.19,  99.90,   0.62,  -0.07,
04/12 02Z,  -0.50,   0.64,  99.90,   0.07,  -0.07,
04/12 03Z,  -0.50,   0.21,  99.90,  -0.36,  -0.07,
04/12 04Z,  -0.50,  -0.00,  99.90,  -0.57,  -0.07,  (min)
04/12 05Z,  -0.50,   0.05,  99.90,  -0.52,  -0.07,
04/12 06Z,  -0.60,   0.35,  99.90,  -0.32,  -0.07,
04/12 07Z,  -0.60,   0.86,  99.90,   0.19,  -0.06,
04/12 08Z,  -0.60,   1.47,  99.90,   0.81,  -0.06,
04/12 09Z,  -0.60,   2.08,  99.90,   1.41,  -0.06,
04/12 10Z,  -0.60,   2.57,  99.90,   1.91,  -0.06,
04/12 11Z,  -0.60,   2.87,  99.90,   2.21,  -0.06,  (max)
04/12 12Z,  -0.70,   2.95,  99.90,   2.19,  -0.06,
04/12 13Z,  -0.70,   2.85,  99.90,   2.09,  -0.06,
04/12 14Z,  -0.70,   2.62,  99.90,   1.86,  -0.06,
04/12 15Z,  -0.70,   2.37,  99.90,   1.61,  -0.06,
04/12 16Z,  -0.70,   2.18,  99.90,   1.42,  -0.06,
04/12 17Z,  -0.70,   2.11,  99.90,   1.35,  -0.06,  (min)
04/12 18Z,  -0.60,   2.19,  99.90,   1.53,  -0.06,
04/12 19Z,  -0.70,   2.36,  99.90,   1.60,  -0.06,
04/12 20Z,  -0.70,   2.55,  99.90,   1.79,  -0.06,
04/12 21Z,  -0.70,   2.69,  99.90,   1.93,  -0.06,  (max)
04/12 22Z,  -0.70,   2.68,  99.90,   1.92,  -0.06,
04/12 23Z,  -0.70,   2.49,  99.90,   1.73,  -0.06,
04/13 00Z,  -0.70,   2.12,  99.90,   1.36,  -0.06,
04/13 01Z,  -0.70,   1.62,  99.90,   0.86,  -0.06,
04/13 02Z,  -0.70,   1.08,  99.90,   0.32,  -0.06,
04/13 03Z,  -0.70,   0.61,  99.90,  -0.15,  -0.06,
04/13 04Z,  -0.70,   0.29,  99.90,  -0.47,  -0.06,
04/13 05Z,  -0.70,   0.21,  99.90,  -0.55,  -0.06,  (min)
04/13 06Z,  -0.70,   0.37,  99.90,  -0.39,  -0.06,
04/13 07Z,  -0.70,   0.75,  99.90,  -0.01,  -0.06,
04/13 08Z,  -0.80,   1.27,  99.90,   0.41,  -0.06,
04/13 09Z,  -0.80,   1.84,  99.90,   0.98,  -0.06,
04/13 10Z,  -0.80,   2.34,  99.90,   1.48,  -0.06,
04/13 11Z,  -0.80,   2.68,  99.90,   1.82,  -0.06,
04/13 12Z,  -0.80,   2.80,  99.90,   1.94,  -0.06,  (max)
04/13 13Z,  -0.80,   2.72,  99.90,   1.86,  -0.06,
04/13 14Z,  -0.70,   2.47,  99.90,   1.71,  -0.06,
04/13 15Z,  -0.70,   2.17,  99.90,   1.41,  -0.06,
04/13 16Z,  -0.70,   1.89,  99.90,   1.13,  -0.06,
04/13 17Z,  -0.60,   1.74,  99.90,   1.08,  -0.06,  (min)
04/13 18Z,  -0.60,   1.74,  99.90,   1.08,  -0.06,
04/13 19Z,  -0.60,   1.89,  99.90,   1.23,  -0.06,
04/13 20Z,  -0.60,   2.13,  99.90,   1.47,  -0.06,
04/13 21Z,  -0.60,   2.38,  99.90,   1.72,  -0.06,
04/13 22Z,  -0.60,   2.54,  99.90,   1.88,  -0.06,
04/13 23Z,  -0.60,   2.55,  99.90,   1.89,  -0.06,  (max)
04/14 00Z,  -0.50,   2.36,  99.90,   1.80,  -0.06,
04/14 01Z,  -0.50,   2.01,  99.90,   1.45,  -0.06,
04/14 02Z,  -0.40,   1.56,  99.90,   1.09,  -0.06,
04/14 03Z,  -0.40,   1.09,  99.90,   0.63,  -0.06,
04/14 04Z,  -0.40,   0.73,  99.90,   0.26,  -0.06,
04/14 05Z,  -0.40,   0.53,  99.90,   0.07,  -0.06,  (min)
04/14 06Z,  -0.30,   0.57,  99.90,   0.21,  -0.06,
04/14 07Z,  -0.30,   0.82,  99.90,   0.46,  -0.06,
04/14 08Z,  -0.30,   1.25,  99.90,   0.88,  -0.06,
04/14 09Z,  -0.30,   1.75,  99.90,   1.39,  -0.06,
04/14 10Z,  -0.30,   2.23,  99.90,   1.87,  -0.06,
04/14 11Z,  -0.20,   2.58,  99.90,   2.32,  -0.06,
04/14 12Z,  -0.20,   2.73,  99.90,   2.47,  -0.06,  (max)
04/14 13Z,  -0.20,   2.66,  99.90,   2.40,  -0.06,
04/14 14Z,  -0.10,   2.39,  99.90,   2.23,  -0.06,
04/14 15Z,  -0.10,   2.02,  99.90,   1.86,  -0.06,
04/14 16Z,  -0.10,   1.63,  99.90,   1.47,  -0.06,
04/14 17Z,  -0.10,   1.34,  99.90,   1.18,  -0.06,
04/14 18Z,  -0.10,   1.22,  99.90,   1.06,  -0.06,  (min)
04/14 19Z,  -0.10,   1.29,  99.90,   1.13,  -0.06,
04/14 20Z,  -0.20,   1.53,  99.90,   1.27,  -0.06,
04/14 21Z,  -0.20,   1.86,  99.90,   1.60,  -0.06,
04/14 22Z,  -0.20,   2.18,  99.90,   1.92,  -0.06,
04/14 23Z,  -0.20,   2.40,  99.90,   2.14,  -0.06,
04/15 00Z,  -0.20,   2.44,  99.90,   2.18,  -0.06,  (max)
04/15 01Z,  -0.20,   2.30,  99.90,   2.04,  -0.06,
04/15 02Z,  -0.10,   2.00,  99.90,   1.84,  -0.06,
04/15 03Z,  -0.10,   1.62,  99.90,   1.46,  -0.06,
04/15 04Z,  -0.10,   1.26,  99.90,   1.10,  -0.06,
04/15 05Z,  -0.10,   1.00,  99.90,   0.84,  -0.06,
04/15 06Z,  -0.10,   0.93,  99.90,   0.77,  -0.06,  (min)
04/15 07Z,  -0.20,   1.06,  99.90,   0.80,  -0.06,
04/15 08Z,  -0.20,   1.37,  99.90,   1.11,  -0.06,
04/15 09Z,  -0.20,   1.80,  99.90,   1.54,  -0.06,
04/15 10Z,  -0.20,   2.24,  99.90,   1.98,  -0.06,
04/15 11Z,  -0.20,   2.60,  99.90,   2.34,  -0.06,
04/15 12Z,  -0.20,   2.78,  99.90,   2.51,  -0.06,  (max)
04/15 13Z,  -0.20,   2.73,  99.90,   2.47,  -0.06,
04/15 14Z,  -0.10,   2.45,  99.90,   2.29,  -0.06,
04/15 15Z,  -0.10,   2.01,  99.90,   1.85,  -0.06,
04/15 16Z,  -0.10,   1.50,  99.90,   1.34,  -0.06,
04/15 17Z,  -0.10,   1.04,  99.90,   0.88,  -0.06,
04/15 18Z,  -0.10,   0.74,  99.90,   0.58,  -0.06,