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Ketchikan water levels in 1991
Annual rank58 / 105
vs. average-0.3 cm
Highest monthly peak3.80 mDecember 1991
Monthly mean vs. previous year
| Month | 1991 (cm) | 1990 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | -8.4 | 12.0 | -20.4 | 3.35 |
| Feb | 12.3 | 2.0 | 10.3 | 3.24 |
| Mar | -3.2 | -1.7 | -1.5 | 3.07 |
| Apr | -9.9 | -9.9 | 0.0 | 2.88 |
| May | -11.7 | -15.1 | 3.4 | 3.14 |
| Jun | -12.4 | -5.6 | -6.8 | 3.05 |
| Jul | -9.6 | -11.7 | 2.1 | 3.14 |
| Aug | -0.8 | -5.0 | 4.2 | 3.19 |
| Sep | -5.9 | -8.1 | 2.2 | 2.95 |
| Oct | -1.1 | 8.7 | -9.8 | 3.19 |
| Nov | 19.7 | 10.5 | 9.2 | 3.63 |
| Dec | 24.2 | -4.1 | 28.3 | 3.80 |
Nearby years (cm vs. average)
+0.6
+4.8
+1.2
-5.6
-2.0
-0.3
+6.1
-0.7
+0.7
-2.1
-2.8
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 1991 annual mean water level ranked 58 of 105 years (-0.3 cm vs. the period average).