PAINTED SHORES
MENUBegin
Wake I. · NOAA 1890000 · 19° 17′ N · 166° 37′ E
Tides at Wake Island, Pacific Ocean
A mixed, mainly semidiurnal tide (form factor 0.27), spring this week. Predicted from the station's 32 harmonic constants; heights above mean lower low water, times in station time. Weather is not in these numbers.
This week
| When | Water | Height |
|---|---|---|
| Mon, Oct 26, 9:37 AM | Low | -0.1 ft |
| Mon, Oct 26, 3:52 PM | High | 2.9 ft |
| Mon, Oct 26, 10:11 PM | Low | -0.4 ft |
| Tue, Oct 27, 4:15 AM | High | 2.5 ft |
| Tue, Oct 27, 10:07 AM | Low | -0.1 ft |
| Tue, Oct 27, 4:23 PM | High | 3.0 ft |
| Tue, Oct 27, 10:49 PM | Low | -0.5 ft |
| Wed, Oct 28, 4:51 AM | High | 2.4 ft |
| Wed, Oct 28, 10:38 AM | Low | -0.1 ft |
| Wed, Oct 28, 4:57 PM | High | 3.0 ft |
| Wed, Oct 28, 11:29 PM | Low | -0.4 ft |
| Thu, Oct 29, 5:29 AM | High | 2.2 ft |
| Thu, Oct 29, 11:10 AM | Low | 0.0 ft |
| Thu, Oct 29, 5:32 PM | High | 2.9 ft |
| Fri, Oct 30, 12:12 AM | Low | -0.3 ft |
| Fri, Oct 30, 6:09 AM | High | 2.0 ft |
| Fri, Oct 30, 11:45 AM | Low | 0.2 ft |
| Fri, Oct 30, 6:11 PM | High | 2.7 ft |
| Sat, Oct 31, 1:00 AM | Low | -0.1 ft |
| Sat, Oct 31, 6:55 AM | High | 1.7 ft |
| Sat, Oct 31, 12:24 PM | Low | 0.4 ft |
| Sat, Oct 31, 6:57 PM | High | 2.5 ft |
| Sun, Nov 1, 1:56 AM | Low | 0.2 ft |
| Sun, Nov 1, 7:53 AM | High | 1.5 ft |
| Sun, Nov 1, 1:12 PM | Low | 0.6 ft |
| Sun, Nov 1, 7:58 PM | High | 2.2 ft |
| Mon, Nov 2, 3:11 AM | Low | 0.4 ft |
The constants that make it
| Constituent | Amplitude | Phase |
|---|---|---|
| M2 | 0.9 ft | 115.5° |
| S2 | 0.5 ft | 149.5° |
| K1 | 0.2 ft | 44.5° |
| O1 | 0.2 ft | 14.8° |
| N2 | 0.2 ft | 105.8° |
| K2 | 0.1 ft | 146.6° |
| SA | 0.1 ft | 167.2° |
| P1 | 0.1 ft | 40.7° |
The eight largest of 32. Source: NOAA CO-OPS harmonic constituents for 1890000, public domain.
The year as a print
The last two days, measured
At Mon, Oct 26 08:24 the gauge read 0.8 ft, 0.6 ft above the computed curve: wind and pressure, not the moon. The widest gap of the two days was 0.9 ft, at Sat, Oct 24 16:36.
- Computed here, from the constants
- NOAA's own prediction
- Measured at the gauge, every six minutes
The last twelve hours as numbers
| Station time | Measured | Computed here | NOAA |
|---|---|---|---|
| Sun, Oct 25 21:00 | 0.42 ft | -0.18 ft | -0.17 ft |
| Sun, Oct 25 22:00 | 0.34 ft | -0.21 ft | -0.21 ft |
| Sun, Oct 25 23:00 | 0.64 ft | 0.12 ft | 0.12 ft |
| Mon, Oct 26 00:00 | 1.39 ft | 0.72 ft | 0.72 ft |
| Mon, Oct 26 01:00 | 2.20 ft | 1.43 ft | 1.43 ft |
| Mon, Oct 26 02:00 | 2.81 ft | 2.07 ft | 2.07 ft |
| Mon, Oct 26 03:00 | 3.24 ft | 2.47 ft | 2.46 ft |
| Mon, Oct 26 04:00 | 3.36 ft | 2.53 ft | 2.52 ft |
| Mon, Oct 26 05:00 | 2.97 ft | 2.22 ft | 2.21 ft |
| Mon, Oct 26 06:00 | 2.38 ft | 1.64 ft | 1.63 ft |
| Mon, Oct 26 07:00 | 1.67 ft | 0.96 ft | 0.94 ft |
| Mon, Oct 26 08:00 | 1.00 ft | 0.35 ft | 0.34 ft |
Measured heights from NOAA CO-OPS station 1890000, preliminary, above mean lower low water. The print carries the computed curve only: one year, no weather.