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PLEASE NOTE that zero is now at Mean Lower Low Water (MLLW).
This is the old default datum.
 
#Chesapeake Bay Br Tunnel, VA : 05/25/2013 06:23:47 GMT (units in feet MLLW)
#Date(GMT), Surge,   Tide,    Obs,   Fcst,   Anom, Comment
#------------------------------------------------------------
05/23 12Z,  -0.40,   2.46,   2.39,  99.90,   0.33,  (max)
05/23 13Z,  -0.40,   2.06,   2.05,  99.90,   0.39,
05/23 14Z,  -0.40,   1.43,   1.39,  99.90,   0.36,
05/23 15Z,  -0.40,   0.68,   0.62,  99.90,   0.34,
05/23 16Z,  -0.40,   0.05,   0.05,  99.90,   0.40,
05/23 17Z,  -0.40,  -0.21,  -0.27,  99.90,   0.34,  (min)
05/23 18Z,  -0.40,  -0.04,  -0.09,  99.90,   0.35,
05/23 19Z,  -0.40,   0.49,   0.44,  99.90,   0.35,
05/23 20Z,  -0.40,   1.26,   1.25,  99.90,   0.39,
05/23 21Z,  -0.40,   2.12,   2.02,  99.90,   0.30,
05/23 22Z,  -0.40,   2.86,   2.70,  99.90,   0.24,
05/23 23Z,  -0.30,   3.30,   3.13,  99.90,   0.13,
05/24 00Z,  -0.30,   3.34,   3.17,  99.90,   0.13,  (max)
05/24 01Z,  -0.30,   3.01,   3.03,  99.90,   0.32,
05/24 02Z,  -0.30,   2.36,   2.38,  99.90,   0.32,
05/24 03Z,  -0.30,   1.49,   1.47,  99.90,   0.28,
05/24 04Z,  -0.30,   0.59,   0.59,  99.90,   0.30,
05/24 05Z,  -0.30,  -0.05,  -0.08,  99.90,   0.27,
05/24 06Z,  -0.30,  -0.26,  -0.15,  99.90,   0.41,  (min)
05/24 07Z,  -0.30,  -0.05,   0.08,  99.90,   0.43,
05/24 08Z,  -0.30,   0.48,   0.59,  99.90,   0.41,
05/24 09Z,  -0.20,   1.20,   1.37,  99.90,   0.37,
05/24 10Z,  -0.20,   1.94,   2.18,  99.90,   0.44,
05/24 11Z,  -0.20,   2.48,   2.74,  99.90,   0.46,
05/24 12Z,  -0.10,   2.67,   2.99,  99.90,   0.42,  (max)
05/24 13Z,  -0.10,   2.51,   2.74,  99.90,   0.33,
05/24 14Z,  -0.10,   2.05,   2.22,  99.90,   0.27,
05/24 15Z,  -0.10,   1.34,   1.60,  99.90,   0.36,
05/24 16Z,   0.00,   0.53,   1.06,  99.90,   0.53,
05/24 17Z,   0.00,  -0.10,   0.78,  99.90,   0.88,
05/24 18Z,  -0.10,  -0.32,   0.50,  99.90,   0.92,
05/24 19Z,  -0.10,  -0.09,   0.43,  99.90,   0.62,  (min)
05/24 20Z,  -0.10,   0.52,   0.74,  99.90,   0.32,
05/24 21Z,  -0.10,   1.36,   1.51,  99.90,   0.25,
05/24 22Z,  -0.10,   2.27,   2.59,  99.90,   0.42,
05/24 23Z,  -0.10,   3.03,   3.60,  99.90,   0.67,
05/25 00Z,   0.00,   3.45,   4.05,  99.90,   0.60,  (max)
05/25 01Z,   0.00,   3.44,   3.82,  99.90,   0.38,
05/25 02Z,   0.00,   3.04,   3.32,  99.90,   0.28,
05/25 03Z,  -0.10,   2.30,   2.87,  99.90,   0.67,
05/25 04Z,  -0.10,   1.35,   1.93,  99.90,   0.68,
05/25 05Z,  -0.10,   0.42,   1.14,  99.90,   0.82,
05/25 06Z,  -0.10,  -0.20,   0.37,  99.90,   0.67,
#------------------------------------------------------------
#Date(GMT), Surge,   Tide,    Obs,   Fcst,   Anom, Comment
#------------------------------------------------------------
05/25 07Z,  -0.10,  -0.36,  99.90,   0.19,   0.65,  (min)
05/25 08Z,  -0.10,  -0.08,  99.90,   0.44,   0.62,
05/25 09Z,  -0.10,   0.51,  99.90,   1.01,   0.60,
05/25 10Z,  -0.10,   1.29,  99.90,   1.76,   0.57,
05/25 11Z,  -0.10,   2.06,  99.90,   2.51,   0.55,
05/25 12Z,  -0.20,   2.59,  99.90,   2.92,   0.53,
05/25 13Z,  -0.20,   2.75,  99.90,   3.06,   0.50,  (max)
05/25 14Z,  -0.20,   2.55,  99.90,   2.83,   0.48,
05/25 15Z,  -0.20,   2.02,  99.90,   2.27,   0.46,
05/25 16Z,  -0.20,   1.24,  99.90,   1.48,   0.43,
05/25 17Z,  -0.10,   0.41,  99.90,   0.72,   0.41,
05/25 18Z,  -0.20,  -0.20,  99.90,  -0.02,   0.38,
05/25 19Z,  -0.20,  -0.38,  99.90,  -0.19,   0.38,  (min)
05/25 20Z,  -0.20,  -0.09,  99.90,   0.10,   0.38,
05/25 21Z,  -0.20,   0.57,  99.90,   0.75,   0.38,
05/25 22Z,  -0.20,   1.45,  99.90,   1.63,   0.38,
05/25 23Z,  -0.20,   2.39,  99.90,   2.57,   0.38,
05/26 00Z,  -0.20,   3.14,  99.90,   3.32,   0.38,
05/26 01Z,  -0.20,   3.51,  99.90,   3.70,   0.38,  (max)
05/26 02Z,  -0.20,   3.45,  99.90,   3.63,   0.38,
05/26 03Z,  -0.20,   2.99,  99.90,   3.17,   0.38,
05/26 04Z,  -0.20,   2.19,  99.90,   2.38,   0.38,
05/26 05Z,  -0.20,   1.20,  99.90,   1.39,   0.38,
05/26 06Z,  -0.20,   0.28,  99.90,   0.47,   0.38,
05/26 07Z,  -0.20,  -0.29,  99.90,  -0.10,   0.38,
05/26 08Z,  -0.20,  -0.39,  99.90,  -0.20,   0.38,  (min)
05/26 09Z,  -0.20,  -0.06,  99.90,   0.13,   0.38,
05/26 10Z,  -0.20,   0.58,  99.90,   0.76,   0.38,
05/26 11Z,  -0.20,   1.39,  99.90,   1.58,   0.38,
05/26 12Z,  -0.20,   2.17,  99.90,   2.35,   0.38,
05/26 13Z,  -0.30,   2.67,  99.90,   2.76,   0.38,
05/26 14Z,  -0.30,   2.80,  99.90,   2.88,   0.38,  (max)
05/26 15Z,  -0.30,   2.55,  99.90,   2.63,   0.38,
05/26 16Z,  -0.30,   1.97,  99.90,   2.06,   0.38,
05/26 17Z,  -0.30,   1.17,  99.90,   1.25,   0.38,
05/26 18Z,  -0.30,   0.33,  99.90,   0.42,   0.38,
05/26 19Z,  -0.30,  -0.24,  99.90,  -0.16,   0.38,
05/26 20Z,  -0.40,  -0.37,  99.90,  -0.38,   0.38,  (min)
05/26 21Z,  -0.40,  -0.04,  99.90,  -0.06,   0.38,
05/26 22Z,  -0.40,   0.63,  99.90,   0.62,   0.38,
05/26 23Z,  -0.30,   1.53,  99.90,   1.61,   0.38,
05/27 00Z,  -0.30,   2.45,  99.90,   2.54,   0.38,
05/27 01Z,  -0.40,   3.17,  99.90,   3.15,   0.38,
05/27 02Z,  -0.40,   3.49,  99.90,   3.47,   0.38,  (max)
05/27 03Z,  -0.40,   3.37,  99.90,   3.36,   0.38,
05/27 04Z,  -0.40,   2.87,  99.90,   2.86,   0.38,
05/27 05Z,  -0.40,   2.05,  99.90,   2.03,   0.38,
05/27 06Z,  -0.40,   1.07,  99.90,   1.05,   0.38,
05/27 07Z,  -0.40,   0.19,  99.90,   0.18,   0.38,
05/27 08Z,  -0.40,  -0.31,  99.90,  -0.33,   0.38,
05/27 09Z,  -0.40,  -0.35,  99.90,  -0.37,   0.38,  (min)
05/27 10Z,  -0.40,   0.01,  99.90,  -0.00,   0.38,
05/27 11Z,  -0.40,   0.67,  99.90,   0.66,   0.38,
05/27 12Z,  -0.40,   1.49,  99.90,   1.48,   0.38,
05/27 13Z,  -0.40,   2.25,  99.90,   2.24,   0.38,
05/27 14Z,  -0.40,   2.72,  99.90,   2.71,   0.38,
05/27 15Z,  -0.40,   2.81,  99.90,   2.79,   0.38,  (max)
05/27 16Z,  -0.40,   2.53,  99.90,   2.51,   0.38,
05/27 17Z,  -0.40,   1.93,  99.90,   1.92,   0.38,
05/27 18Z,  -0.40,   1.13,  99.90,   1.11,   0.38,
05/27 19Z,  -0.40,   0.32,  99.90,   0.31,   0.38,
05/27 20Z,  -0.40,  -0.20,  99.90,  -0.22,   0.38,
05/27 21Z,  -0.40,  -0.29,  99.90,  -0.31,   0.38,  (min)
05/27 22Z,  -0.40,   0.04,  99.90,   0.03,   0.38,
05/27 23Z,  -0.40,   0.70,  99.90,   0.69,   0.38,
05/28 00Z,  -0.40,   1.57,  99.90,   1.56,   0.38,
05/28 01Z,  -0.40,   2.46,  99.90,   2.44,   0.38,
05/28 02Z,  -0.40,   3.11,  99.90,   3.10,   0.38,
05/28 03Z,  -0.40,   3.38,  99.90,   3.36,   0.38,  (max)
05/28 04Z,  -0.50,   3.23,  99.90,   3.11,   0.38,
05/28 05Z,  -0.50,   2.71,  99.90,   2.60,   0.38,
05/28 06Z,  -0.50,   1.90,  99.90,   1.79,   0.38,
05/28 07Z,  -0.50,   0.96,  99.90,   0.85,   0.38,
05/28 08Z,  -0.50,   0.16,  99.90,   0.04,   0.38,
05/28 09Z,  -0.50,  -0.27,  99.90,  -0.39,   0.38,  (min)
05/28 10Z,  -0.50,  -0.27,  99.90,  -0.39,   0.38,
05/28 11Z,  -0.50,   0.11,  99.90,  -0.01,   0.38,
05/28 12Z,  -0.50,   0.77,  99.90,   0.66,   0.38,
05/28 13Z,  -0.50,   1.58,  99.90,   1.46,   0.38,
05/28 14Z,  -0.50,   2.30,  99.90,   2.19,   0.38,
05/28 15Z,  -0.50,   2.73,  99.90,   2.62,   0.38,
05/28 16Z,  -0.50,   2.79,  99.90,   2.67,   0.38,  (max)
05/28 17Z,  -0.50,   2.50,  99.90,   2.38,   0.38,
05/28 18Z,  -0.50,   1.91,  99.90,   1.79,   0.38,
05/28 19Z,  -0.50,   1.13,  99.90,   1.02,   0.38,
05/28 20Z,  -0.50,   0.38,  99.90,   0.26,   0.38,
05/28 21Z,  -0.40,  -0.10,  99.90,  -0.12,   0.38,
05/28 22Z,  -0.40,  -0.17,  99.90,  -0.19,   0.38,  (min)
05/28 23Z,  -0.40,   0.14,  99.90,   0.13,   0.38,
05/29 00Z,  -0.40,   0.76,  99.90,   0.75,   0.38,
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