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Philadelphia, US Coast Guard Station, Pa. water levels in 2011
Annual rank4 / 36
vs. average9.9 cm
Highest monthly peak2.12 mApril 2011
Monthly mean vs. previous year
| Month | 2011 (cm) | 2010 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | -9.3 | -2.5 | -6.8 | 1.22 |
| Feb | -9.5 | -1.4 | -8.1 | 1.34 |
| Mar | 16.8 | 30.1 | -13.3 | 1.66 |
| Apr | 18.2 | 14.5 | 3.7 | 2.12 |
| May | 28.5 | 7.0 | 21.5 | 1.60 |
| Jun | 20.3 | 11.0 | 9.3 | 1.54 |
| Jul | 16.9 | 7.4 | 9.5 | 1.50 |
| Aug | 27.0 | 15.9 | 11.1 | 1.96 |
| Sep | 42.3 | 12.9 | 29.4 | 1.85 |
| Oct | 24.4 | 12.4 | 12.0 | 1.55 |
| Nov | 10.5 | 9.1 | 1.4 | 1.60 |
| Dec | 7.0 | -4.4 | 11.4 | 1.37 |
Nearby years (cm vs. average)
+0.6
-5.6
-1.2
+2.6
+3.2
+9.9
+2.0
-1.1
+1.1
-2.8
-0.1
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 36 years (9.9 cm vs. the period average).