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
Cherry Point, WA
Friday Harbor WA
Port Townsend
Seattle, WA
Port Angeles, WA
Neah Bay, WA
Toke Point, WA
Astoria, OR
South Beach, OR
Charleston, OR
Port Orford, OR
Crescent City, CA
North Spit, CA
Arena Cove, CA
Point Reyes, CA
Port Chicago, CA
San Francisco CA
Surge List
West Coast
#Seattle, WA : 04/16/2026 11:22:56 GMT (units in feet HAT)
#Date(GMT), Surge,   Tide,    Obs,   Fcst,   Anom, Comment
#------------------------------------------------------------
04/14 12Z,   0.60,  -3.32,  -2.69,  99.90,   0.03,  (max)
04/14 13Z,   0.60,  -4.69,  -3.85,  99.90,   0.24,
04/14 14Z,   0.60,  -6.47,  -5.57,  99.90,   0.30,
04/14 15Z,   0.60,  -8.24,  -7.47,  99.90,   0.17,
04/14 16Z,   0.60,  -9.49,  -8.89,  99.90,  -0.00,
04/14 17Z,   0.60,  -9.89,  -9.41,  99.90,  -0.12,  (min)
04/14 18Z,   0.70,  -9.43,  -8.89,  99.90,  -0.16,
04/14 19Z,   0.70,  -8.30,  -7.79,  99.90,  -0.19,
04/14 20Z,   0.80,  -6.80,  -6.38,  99.90,  -0.38,
04/14 21Z,   0.80,  -5.37,  -4.90,  99.90,  -0.33,
04/14 22Z,   0.80,  -4.46,  -3.90,  99.90,  -0.24,
04/14 23Z,   0.80,  -4.35,  -3.74,  99.90,  -0.19,  (max)
04/15 00Z,   0.90,  -5.03,  -4.35,  99.90,  -0.22,
04/15 01Z,   0.90,  -6.35,  -5.54,  99.90,  -0.09,
04/15 02Z,   0.90,  -8.07,  -7.21,  99.90,  -0.04,
04/15 03Z,   0.90,  -9.78,  -8.87,  99.90,   0.01,
04/15 04Z,   0.90, -10.92, -10.04,  99.90,  -0.02,
04/15 05Z,   0.90, -11.06, -10.30,  99.90,  -0.14,  (min)
04/15 06Z,   0.90, -10.14,  -9.42,  99.90,  -0.18,
04/15 07Z,   0.90,  -8.42,  -7.76,  99.90,  -0.24,
04/15 08Z,   1.00,  -6.30,  -5.68,  99.90,  -0.38,
04/15 09Z,   1.00,  -4.25,  -3.48,  99.90,  -0.23,
04/15 10Z,   1.00,  -2.79,  -1.93,  99.90,  -0.14,
04/15 11Z,   1.00,  -2.27,  -1.38,  99.90,  -0.11,  (max)
04/15 12Z,   1.00,  -2.76,  -1.82,  99.90,  -0.06,
04/15 13Z,   1.00,  -4.11,  -3.01,  99.90,   0.10,
04/15 14Z,   1.00,  -6.09,  -4.86,  99.90,   0.23,
04/15 15Z,   1.00,  -8.33,  -7.18,  99.90,   0.15,
04/15 16Z,   1.00, -10.25,  -9.23,  99.90,   0.02,
04/15 17Z,   1.00, -11.31, -10.37,  99.90,  -0.06,  (min)
04/15 18Z,   1.00, -11.23, -10.35,  99.90,  -0.12,
04/15 19Z,   1.00, -10.14,  -9.23,  99.90,  -0.09,
04/15 20Z,   1.00,  -8.37,  -7.60,  99.90,  -0.23,
04/15 21Z,   1.00,  -6.37,  -5.63,  99.90,  -0.26,
04/15 22Z,   1.00,  -4.66,  -3.83,  99.90,  -0.17,
04/15 23Z,   1.00,  -3.68,  -2.90,  99.90,  -0.22,
04/16 00Z,   1.00,  -3.63,  -2.88,  99.90,  -0.25,  (max)
04/16 01Z,   1.00,  -4.44,  -3.75,  99.90,  -0.31,
04/16 02Z,   1.00,  -5.91,  -5.11,  99.90,  -0.20,
04/16 03Z,   1.00,  -7.72,  -6.98,  99.90,  -0.26,
04/16 04Z,   1.00,  -9.39,  -8.85,  99.90,  -0.46,
04/16 05Z,   1.00, -10.33,  -9.93,  99.90,  -0.60,  (min)
04/16 06Z,   1.00, -10.19,  -9.87,  99.90,  -0.68,
04/16 07Z,   0.90,  -8.98,  -8.69,  99.90,  -0.61,
04/16 08Z,   0.90,  -7.08,  -6.88,  99.90,  -0.70,
04/16 09Z,   0.90,  -4.94,  -4.66,  99.90,  -0.62,
04/16 10Z,   0.80,  -3.12,  -2.73,  99.90,  -0.41,
04/16 11Z,   0.80,  -2.11,  -1.64,  99.90,  -0.33,  (max)
#------------------------------------------------------------
#Date(GMT), Surge,   Tide,    Obs,   Fcst,   Anom, Comment
#------------------------------------------------------------
04/16 12Z,   0.80,  -2.20,  99.90,  -1.72,  -0.32,
04/16 13Z,   0.70,  -3.37,  99.90,  -2.97,  -0.30,
04/16 14Z,   0.70,  -5.39,  99.90,  -4.97,  -0.28,
04/16 15Z,   0.70,  -7.92,  99.90,  -7.48,  -0.27,
04/16 16Z,   0.70, -10.45,  99.90, -10.00,  -0.25,
04/16 17Z,   0.70, -12.33,  99.90, -11.86,  -0.23,
04/16 18Z,   0.60, -12.99,  99.90, -12.61,  -0.21,  (min)
04/16 19Z,   0.60, -12.29,  99.90, -11.89,  -0.20,
04/16 20Z,   0.60, -10.51,  99.90, -10.09,  -0.18,
04/16 21Z,   0.60,  -8.14,  99.90,  -7.70,  -0.16,
04/16 22Z,   0.60,  -5.73,  99.90,  -5.28,  -0.15,
04/16 23Z,   0.50,  -3.86,  99.90,  -3.49,  -0.13,
04/17 00Z,   0.50,  -2.90,  99.90,  -2.53,  -0.13,  (max)
04/17 01Z,   0.50,  -2.98,  99.90,  -2.61,  -0.13,
04/17 02Z,   0.50,  -3.92,  99.90,  -3.55,  -0.13,
04/17 03Z,   0.50,  -5.47,  99.90,  -5.10,  -0.13,
04/17 04Z,   0.50,  -7.28,  99.90,  -6.91,  -0.13,
04/17 05Z,   0.50,  -8.82,  99.90,  -8.45,  -0.13,
04/17 06Z,   0.50,  -9.50,  99.90,  -9.13,  -0.13,  (min)
04/17 07Z,   0.60,  -9.05,  99.90,  -8.58,  -0.13,
04/17 08Z,   0.60,  -7.63,  99.90,  -7.16,  -0.13,
04/17 09Z,   0.60,  -5.66,  99.90,  -5.19,  -0.13,
04/17 10Z,   0.50,  -3.69,  99.90,  -3.32,  -0.13,
04/17 11Z,   0.50,  -2.25,  99.90,  -1.88,  -0.13,
04/17 12Z,   0.50,  -1.81,  99.90,  -1.44,  -0.13,  (max)
04/17 13Z,   0.50,  -2.57,  99.90,  -2.20,  -0.13,
04/17 14Z,   0.50,  -4.41,  99.90,  -4.04,  -0.13,
04/17 15Z,   0.50,  -7.00,  99.90,  -6.63,  -0.13,
04/17 16Z,   0.50,  -9.91,  99.90,  -9.54,  -0.13,
04/17 17Z,   0.50, -12.54,  99.90, -12.17,  -0.13,
04/17 18Z,   0.50, -14.16,  99.90, -13.80,  -0.13,
04/17 19Z,   0.50, -14.29,  99.90, -13.92,  -0.13,  (min)
04/17 20Z,   0.50, -12.93,  99.90, -12.56,  -0.13,
04/17 21Z,   0.50, -10.53,  99.90, -10.16,  -0.13,
04/17 22Z,   0.50,  -7.69,  99.90,  -7.32,  -0.13,
04/17 23Z,   0.50,  -5.04,  99.90,  -4.67,  -0.13,
04/18 00Z,   0.50,  -3.12,  99.90,  -2.75,  -0.13,
04/18 01Z,   0.50,  -2.26,  99.90,  -1.89,  -0.13,  (max)
04/18 02Z,   0.50,  -2.45,  99.90,  -2.08,  -0.13,
04/18 03Z,   0.50,  -3.48,  99.90,  -3.11,  -0.13,
04/18 04Z,   0.50,  -5.05,  99.90,  -4.68,  -0.13,
04/18 05Z,   0.50,  -6.78,  99.90,  -6.41,  -0.13,
04/18 06Z,   0.50,  -8.10,  99.90,  -7.73,  -0.13,
04/18 07Z,   0.60,  -8.51,  99.90,  -8.04,  -0.13,  (min)
04/18 08Z,   0.60,  -7.81,  99.90,  -7.34,  -0.13,
04/18 09Z,   0.60,  -6.29,  99.90,  -5.82,  -0.13,
04/18 10Z,   0.60,  -4.42,  99.90,  -3.95,  -0.13,
04/18 11Z,   0.60,  -2.76,  99.90,  -2.29,  -0.13,
04/18 12Z,   0.60,  -1.80,  99.90,  -1.33,  -0.13,  (max)
04/18 13Z,   0.60,  -1.95,  99.90,  -1.48,  -0.13,
04/18 14Z,   0.60,  -3.31,  99.90,  -2.85,  -0.13,
04/18 15Z,   0.60,  -5.68,  99.90,  -5.21,  -0.13,
04/18 16Z,   0.60,  -8.67,  99.90,  -8.20,  -0.13,
04/18 17Z,   0.60, -11.76,  99.90, -11.29,  -0.13,
04/18 18Z,   0.70, -14.28,  99.90, -13.71,  -0.13,
04/18 19Z,   0.70, -15.51,  99.90, -14.94,  -0.13,  (min)
04/18 20Z,   0.70, -15.08,  99.90, -14.51,  -0.13,
04/18 21Z,   0.70, -13.14,  99.90, -12.57,  -0.13,
04/18 22Z,   0.70, -10.27,  99.90,  -9.70,  -0.13,
04/18 23Z,   0.70,  -7.15,  99.90,  -6.59,  -0.13,
04/19 00Z,   0.70,  -4.43,  99.90,  -3.86,  -0.13,
04/19 01Z,   0.70,  -2.57,  99.90,  -2.00,  -0.13,
04/19 02Z,   0.70,  -1.83,  99.90,  -1.26,  -0.13,  (max)
04/19 03Z,   0.70,  -2.11,  99.90,  -1.54,  -0.13,
04/19 04Z,   0.80,  -3.16,  99.90,  -2.49,  -0.13,
04/19 05Z,   0.80,  -4.68,  99.90,  -4.01,  -0.13,
04/19 06Z,   0.80,  -6.24,  99.90,  -5.57,  -0.13,
04/19 07Z,   0.80,  -7.33,  99.90,  -6.66,  -0.13,
04/19 08Z,   0.80,  -7.49,  99.90,  -6.82,  -0.13,  (min)
04/19 09Z,   0.80,  -6.66,  99.90,  -5.99,  -0.13,
04/19 10Z,   0.80,  -5.18,  99.90,  -4.51,  -0.13,
04/19 11Z,   0.80,  -3.55,  99.90,  -2.88,  -0.13,
04/19 12Z,   0.80,  -2.27,  99.90,  -1.60,  -0.13,
04/19 13Z,   0.80,  -1.79,  99.90,  -1.13,  -0.13,  (max)
04/19 14Z,   0.80,  -2.45,  99.90,  -1.78,  -0.13,
04/19 15Z,   0.80,  -4.26,  99.90,  -3.59,  -0.13,
04/19 16Z,   0.80,  -6.96,  99.90,  -6.29,  -0.13,
04/19 17Z,   0.80, -10.12,  99.90,  -9.45,  -0.13,
04/19 18Z,   0.80, -13.18,  99.90, -12.51,  -0.13,
04/19 19Z,   0.80, -15.44,  99.90, -14.77,  -0.13,
04/19 20Z,   0.80, -16.24,  99.90, -15.57,  -0.13,  (min)
04/19 21Z,   0.80, -15.31,  99.90, -14.64,  -0.13,
04/19 22Z,   0.80, -12.97,  99.90, -12.30,  -0.13,
04/19 23Z,   0.80,  -9.87,  99.90,  -9.20,  -0.13,
04/20 00Z,   0.80,  -6.69,  99.90,  -6.02,  -0.13,