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Sand Point, Popof Island water levels in 1990
Annual rank47 / 50
vs. average-8.1 cm
Highest monthly peak1.93 mDecember 1990
Monthly mean vs. previous year
| Month | 1990 (cm) | 1989 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | 7.6 | -9.1 | 16.7 | 1.65 |
| Feb | -13.4 | -23.8 | 10.4 | 1.44 |
| Mar | -0.6 | -11.3 | 10.7 | 1.63 |
| Apr | -12.8 | -14.6 | 1.8 | 1.30 |
| May | -14.6 | -19.2 | 4.6 | 1.56 |
| Jun | -11.6 | -10.4 | -1.2 | 1.41 |
| Jul | -8.8 | -14.0 | 5.2 | 1.34 |
| Aug | -6.4 | -10.1 | 3.7 | 1.24 |
| Sep | 3.4 | -0.9 | 4.3 | 1.34 |
| Oct | -1.8 | -1.2 | -0.6 | 1.47 |
| Nov | -10.4 | 4.3 | -14.7 | 1.48 |
| Dec | -3.3 | 18.3 | -21.6 | 1.93 |
Nearby years (cm vs. average)
-8.7
-0.2
+2.9
+3.0
-9.7
-8.1
-3.0
-1.8
-2.6
-3.9
+0.9
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 1990 annual mean water level ranked 47 of 50 years (-8.1 cm vs. the period average).