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Ketchikan water levels in 1990
Annual rank77 / 105
vs. average-2.0 cm
Highest monthly peak3.59 mDecember 1990
Monthly mean vs. previous year
| Month | 1990 (cm) | 1989 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | 12.0 | 6.2 | 5.8 | 3.14 |
| Feb | 2.0 | -24.2 | 26.2 | 3.02 |
| Mar | -1.7 | 1.1 | -2.8 | 3.13 |
| Apr | -9.9 | -10.8 | 0.9 | 3.27 |
| May | -15.1 | -11.4 | -3.7 | 3.09 |
| Jun | -5.6 | -12.7 | 7.1 | 3.12 |
| Jul | -11.7 | -8.1 | -3.6 | 2.92 |
| Aug | -5.0 | -13.3 | 8.3 | 2.80 |
| Sep | -8.1 | -14.2 | 6.1 | 2.82 |
| Oct | 8.7 | 1.1 | 7.6 | 3.05 |
| Nov | 10.5 | 8.1 | 2.4 | 3.48 |
| Dec | -4.1 | 7.2 | -11.3 | 3.59 |
Nearby years (cm vs. average)
-7.3
+0.6
+4.8
+1.2
-5.6
-2.0
-0.3
+6.1
-0.7
+0.7
-2.1
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 1990 annual mean water level ranked 77 of 105 years (-2.0 cm vs. the period average).