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Johnston Atoll water levels in 1990
Annual rank30 / 48
vs. average-2.0 cm
Highest monthly peak0.66 mDecember 1990
Monthly mean vs. previous year
| Month | 1990 (cm) | 1989 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | 8.1 | -3.2 | 11.3 | 0.61 |
| Feb | -11.4 | -16.0 | 4.6 | 0.40 |
| Mar | -15.4 | -11.1 | -4.3 | 0.42 |
| Apr | -6.8 | 7.5 | -14.3 | 0.57 |
| May | -7.1 | -7.0 | -0.1 | 0.46 |
| Jun | -5.0 | -14.5 | 9.5 | 0.44 |
| Jul | -3.5 | -5.6 | 2.1 | 0.50 |
| Aug | 10.2 | -2.9 | 13.1 | 0.56 |
| Sep | -1.7 | -1.3 | -0.4 | 0.46 |
| Oct | -2.6 | 0.5 | -3.1 | 0.54 |
| Nov | -1.3 | 9.3 | -10.6 | 0.50 |
| Dec | -1.7 | 1.1 | -2.8 | 0.66 |
Nearby years (cm vs. average)
-3.2
-3.9
-0.4
+6.6
-2.4
-2.0
-3.4
+4.5
+0.6
+1.5
+1.5
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 1990 annual mean water level ranked 30 of 48 years (-2.0 cm vs. the period average).