PAINTED SHORES
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HI · NOAA 1615680 · 20° 54′ N · 156° 28′ W
Tides at Kahului, Kahului Harbor
A mixed, mainly semidiurnal tide (form factor 0.95), spring this week. Predicted from the station's 29 harmonic constants; heights above mean lower low water, times in station time. Weather is not in these numbers.
This week
| When | Water | Height |
|---|---|---|
| Sun, Oct 25, 1:19 PM | High | 1.9 ft |
| Sun, Oct 25, 7:39 PM | Low | -0.3 ft |
| Mon, Oct 26, 2:38 AM | High | 2.7 ft |
| Mon, Oct 26, 8:45 AM | Low | 0.8 ft |
| Mon, Oct 26, 1:44 PM | High | 1.8 ft |
| Mon, Oct 26, 8:08 PM | Low | -0.4 ft |
| Tue, Oct 27, 3:20 AM | High | 2.8 ft |
| Tue, Oct 27, 9:36 AM | Low | 0.9 ft |
| Tue, Oct 27, 2:08 PM | High | 1.6 ft |
| Tue, Oct 27, 8:40 PM | Low | -0.4 ft |
| Wed, Oct 28, 4:06 AM | High | 2.8 ft |
| Wed, Oct 28, 10:35 AM | Low | 1.1 ft |
| Wed, Oct 28, 2:29 PM | High | 1.5 ft |
| Wed, Oct 28, 9:16 PM | Low | -0.3 ft |
| Thu, Oct 29, 5:00 AM | High | 2.7 ft |
| Thu, Oct 29, 11:54 AM | Low | 1.2 ft |
| Thu, Oct 29, 2:41 PM | High | 1.3 ft |
| Thu, Oct 29, 9:55 PM | Low | -0.2 ft |
| Fri, Oct 30, 6:05 AM | High | 2.5 ft |
| Fri, Oct 30, 10:42 PM | Low | 0.0 ft |
| Sat, Oct 31, 7:27 AM | High | 2.4 ft |
| Sat, Oct 31, 11:48 PM | Low | 0.3 ft |
| Sun, Nov 1, 8:51 AM | High | 2.4 ft |
The constants that make it
| Constituent | Amplitude | Phase |
|---|---|---|
| M2 | 0.6 ft | 8.0° |
| K1 | 0.6 ft | 233.3° |
| S2 | 0.3 ft | 15.3° |
| O1 | 0.3 ft | 219.7° |
| P1 | 0.2 ft | 230.1° |
| SA | 0.2 ft | 179.2° |
| N2 | 0.1 ft | 1.4° |
| K2 | 0.1 ft | 9.4° |
The eight largest of 29. Source: NOAA CO-OPS harmonic constituents for 1615680, public domain.
The year as a print
The last two days, measured
At Sun, Oct 25 10:24 the gauge read 1.4 ft, 0.2 ft above the computed curve: wind and pressure, not the moon. The widest gap of the two days was 0.5 ft, at Sat, Oct 24 02:12.
- 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 |
|---|---|---|---|
| Sat, Oct 24 23:00 | 1.70 ft | 1.48 ft | 1.46 ft |
| Sun, Oct 25 00:00 | 2.33 ft | 2.04 ft | 2.02 ft |
| Sun, Oct 25 01:00 | 2.74 ft | 2.42 ft | 2.41 ft |
| Sun, Oct 25 02:00 | 2.83 ft | 2.55 ft | 2.55 ft |
| Sun, Oct 25 03:00 | 2.72 ft | 2.41 ft | 2.42 ft |
| Sun, Oct 25 04:00 | 2.41 ft | 2.06 ft | 2.06 ft |
| Sun, Oct 25 05:00 | 1.91 ft | 1.58 ft | 1.60 ft |
| Sun, Oct 25 06:00 | 1.43 ft | 1.12 ft | 1.14 ft |
| Sun, Oct 25 07:00 | 0.96 ft | 0.80 ft | 0.82 ft |
| Sun, Oct 25 08:00 | 0.93 ft | 0.69 ft | 0.72 ft |
| Sun, Oct 25 09:00 | 1.14 ft | 0.81 ft | 0.83 ft |
| Sun, Oct 25 10:00 | 1.44 ft | 1.09 ft | 1.11 ft |
Measured heights from NOAA CO-OPS station 1615680, preliminary, above mean lower low water. The print carries the computed curve only: one year, no weather.