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Portland water levels in 2011
Annual rank4 / 114
vs. average12.0 cm
Highest monthly peak2.38 mJanuary 2011
Monthly mean vs. previous year
| Month | 2011 (cm) | 2010 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | 9.1 | 14.1 | -5.0 | 2.38 |
| Feb | 6.3 | 20.0 | -13.7 | 2.16 |
| Mar | 2.5 | 20.2 | -17.7 | 2.19 |
| Apr | 7.0 | 15.0 | -8.0 | 2.17 |
| May | 13.4 | 9.8 | 3.6 | 2.17 |
| Jun | 15.1 | 13.4 | 1.7 | 2.16 |
| Jul | 12.3 | 9.8 | 2.5 | 1.97 |
| Aug | 14.3 | 10.0 | 4.3 | 2.13 |
| Sep | 9.5 | 12.1 | -2.6 | 2.23 |
| Oct | 14.4 | 13.0 | 1.4 | 2.16 |
| Nov | 4.3 | 11.0 | -6.7 | 2.22 |
| Dec | 1.3 | 17.2 | -15.9 | 2.16 |
Nearby years (cm vs. average)
+7.4
+1.9
+3.9
+9.3
+16.7
+12.0
+11.4
+9.6
+8.8
+3.1
+7.1
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 2011 annual mean water level ranked 4 of 114 years (12.0 cm vs. the period average).