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Johnston Atoll: water level history

Record1950–200248 years
Great diurnal range0.68 mNo. 87
Highest water level1.52 m1958-01-13

Annual mean water level vs. period average (cm)

annual1950: 1.319501951: 01954: 7.81955: 3.11956: 4.91957: 7.91958: 4.019581959: 8.41960: 6.11961: 12.41963: 4.41964: 9.71965: 2.419651966: 9.01967: 3.71968: 2.91969: 8.01970: 11.71971: 6.819711972: 1.11973: 4.41974: 5.81975: 7.61976: 0.71977: 6.419771978: 4.21979: 1.81980: 10.91981: 14.81982: 2.61983: 7.419831984: 12.61985: 3.41986: 2.71987: 6.11988: 13.11989: 4.119891990: 4.51991: 3.11992: 11.01993: 7.11994: 8.11995: 8.019951996: 12.31997: 7.51998: 8.62001: 11.62002: 7.6

Bars are relative to the lowest year on record.

Top 10 monthly highest water levels

MonthHighest (m above MSL)
January 19581.200
January 19621.017
January 19590.895
August 19720.895
January 19740.895
February 19860.870
January 20030.862
October 19940.849
January 19540.834
January 19990.824
Times and heights are NOAA astronomical predictions and do not include weather effects. Times are station local time (incl. daylight saving), heights in metres above MLLW. Not for navigation.
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Monthly mean water levels at Johnston Atoll since 1950.