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Sand Point, Popof Island water levels in 1991
Annual rank35 / 50
vs. average-3.0 cm
Highest monthly peak1.95 mDecember 1991
Monthly mean vs. previous year
| Month | 1991 (cm) | 1990 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | -1.5 | 7.6 | -9.1 | 1.75 |
| Feb | 9.8 | -13.4 | 23.2 | 1.52 |
| Mar | -19.5 | -0.6 | -18.9 | 1.15 |
| Apr | -3.3 | -12.8 | 9.5 | 1.54 |
| May | -11.3 | -14.6 | 3.3 | 1.38 |
| Jun | -14.9 | -11.6 | -3.3 | 1.33 |
| Jul | -15.5 | -8.8 | -6.7 | 1.46 |
| Aug | -5.2 | -6.4 | 1.2 | 1.51 |
| Sep | 11.3 | 3.4 | 7.9 | 1.43 |
| Oct | 0.9 | -1.8 | 2.7 | 1.65 |
| Nov | 21.0 | -10.4 | 31.4 | 1.79 |
| Dec | 15.9 | -3.3 | 19.2 | 1.95 |
Nearby years (cm vs. average)
-0.2
+2.9
+3.0
-9.7
-8.1
-3.0
-1.8
-2.6
-3.9
+0.9
-8.9
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 1991 annual mean water level ranked 35 of 50 years (-3.0 cm vs. the period average).