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Oceanographic Institution water levels in 1999
Annual rank23 / 88
vs. average5.1 cm
Highest monthly peak0.78 mApril 1999
Monthly mean vs. previous year
| Month | 1999 (cm) | 1998 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | -5.9 | 6.3 | -12.2 | 0.77 |
| Feb | 4.9 | 13.0 | -8.1 | 0.77 |
| Mar | -1.2 | 1.5 | -2.7 | 0.69 |
| Apr | 4.5 | 7.9 | -3.4 | 0.78 |
| May | 2.8 | 10.8 | -8.0 | 0.64 |
| Jun | 1.9 | 10.4 | -8.5 | 0.70 |
| Jul | 8.0 | 9.6 | -1.6 | 0.68 |
| Aug | 10.1 | 5.8 | 4.3 | – |
| Sep | 8.8 | 10.6 | -1.8 | – |
| Oct | 4.5 | 4.6 | -0.1 | – |
| Nov | -0.2 | 2.4 | -2.6 | 0.61 |
| Dec | -1.6 | -1.2 | -0.4 | 0.65 |
Nearby years (cm vs. average)
-2.8
-0.7
+6.6
+6.8
+8.9
+5.1
+3.4
+4.7
+3.4
+3.7
+4.0
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 1999 annual mean water level ranked 23 of 88 years (5.1 cm vs. the period average).