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Sand Point, Popof Island water levels in 1999
Annual rank45 / 50
vs. average-6.4 cm
Highest monthly peak1.67 mDecember 1999
Monthly mean vs. previous year
| Month | 1999 (cm) | 1998 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | -1.5 | 23.1 | -24.6 | 1.42 |
| Feb | 4.3 | 35.7 | -31.4 | 1.52 |
| Mar | 0.0 | 4.8 | -4.8 | 1.52 |
| Apr | -18.4 | -4.1 | -14.3 | 1.39 |
| May | -19.5 | -11.1 | -8.4 | 1.27 |
| Jun | -12.1 | -15.9 | 3.8 | 1.51 |
| Jul | -20.7 | -8.2 | -12.5 | 1.38 |
| Aug | -9.1 | -9.9 | 0.8 | 1.21 |
| Sep | -0.4 | -0.7 | 0.3 | 1.20 |
| Oct | 3.4 | 3.8 | -0.4 | 1.41 |
| Nov | 16.6 | 15.9 | 0.7 | 1.67 |
| Dec | 4.9 | 7.2 | -2.3 | 1.67 |
Nearby years (cm vs. average)
-3.9
+0.9
-8.9
+1.5
+1.4
-6.4
-3.0
-0.3
-1.3
+4.1
+2.0
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 1999 annual mean water level ranked 45 of 50 years (-6.4 cm vs. the period average).