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Charlotte Amalie, St. Thomas Island water levels in 1991
Annual rank17 / 43
vs. average1.3 cm
Highest monthly peak0.37 mOctober 1991
Monthly mean vs. previous year
| Month | 1991 (cm) | 1990 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | -2.6 | -2.3 | -0.3 | 0.20 |
| Feb | -4.5 | -8.1 | 3.6 | 0.14 |
| Mar | -3.3 | -9.0 | 5.7 | 0.15 |
| Apr | -5.1 | -5.7 | 0.6 | 0.17 |
| May | 1.6 | -6.0 | 7.6 | 0.25 |
| Jun | 5.6 | -4.8 | 10.4 | 0.30 |
| Jul | 2.5 | -2.6 | 5.1 | 0.28 |
| Aug | 3.2 | 0.7 | 2.5 | 0.23 |
| Sep | 15.3 | 3.8 | 11.5 | 0.36 |
| Oct | 14.4 | 6.8 | 7.6 | 0.37 |
| Nov | 12.0 | 4.7 | 7.3 | 0.33 |
| Dec | 4.1 | 2.2 | 1.9 | 0.26 |
Nearby years (cm vs. average)
-1.3
-4.9
-6.2
-6.2
-4.0
+1.3
+0.5
-2.3
+0.8
-4.3
-5.1
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 1991 annual mean water level ranked 17 of 43 years (1.3 cm vs. the period average).