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Portland water levels in 1998
Annual rank19 / 114
vs. average7.3 cm
Highest monthly peak2.21 mJanuary 1998
Monthly mean vs. previous year
| Month | 1998 (cm) | 1997 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | 5.7 | 3.2 | 2.5 | 2.21 |
| Feb | 11.6 | -2.1 | 13.7 | 2.18 |
| Mar | 4.2 | -0.4 | 4.6 | 2.06 |
| Apr | 7.9 | 8.9 | -1.0 | 2.07 |
| May | 7.9 | 2.2 | 5.7 | 2.11 |
| Jun | 9.0 | 4.3 | 4.7 | 1.99 |
| Jul | 6.7 | -0.5 | 7.2 | 1.94 |
| Aug | 0.2 | 1.5 | -1.3 | 1.78 |
| Sep | 5.6 | 2.7 | 2.9 | 2.10 |
| Oct | -0.5 | 3.7 | -4.2 | 1.94 |
| Nov | -1.1 | 6.7 | -7.8 | 2.06 |
| Dec | -4.3 | 4.2 | -8.5 | 2.11 |
Nearby years (cm vs. average)
+2.8
-0.6
+3.9
+7.1
+5.8
+7.3
+2.0
+2.3
+2.0
+0.8
+2.9
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 1998 annual mean water level ranked 19 of 114 years (7.3 cm vs. the period average).