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MS · NOAA 8747437 · 30° 20′ N · 89° 20′ W
Tides at Bay Waveland Yacht Club
A diurnal tide (form factor 5.77), 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 |
|---|---|---|
| Sun, Oct 25, 11:21 PM | High | 2.1 ft |
| Mon, Oct 26, 8:51 AM | Low | 0.2 ft |
| Mon, Oct 26, 11:51 PM | High | 2.3 ft |
| Tue, Oct 27, 9:46 AM | Low | 0.1 ft |
| Wed, Oct 28, 12:29 AM | High | 2.5 ft |
| Wed, Oct 28, 10:53 AM | Low | -0.0 ft |
| Thu, Oct 29, 1:14 AM | High | 2.6 ft |
| Thu, Oct 29, 12:25 PM | Low | -0.0 ft |
| Fri, Oct 30, 2:03 AM | High | 2.6 ft |
| Fri, Oct 30, 2:17 PM | Low | -0.1 ft |
| Sat, Oct 31, 2:57 AM | High | 2.5 ft |
| Sat, Oct 31, 3:33 PM | Low | -0.0 ft |
| Sun, Nov 1, 2:53 AM | High | 2.3 ft |
The constants that make it
| Constituent | Amplitude | Phase |
|---|---|---|
| K1 | 0.6 ft | 58.5° |
| O1 | 0.5 ft | 48.8° |
| SA | 0.4 ft | 138.5° |
| SSA | 0.3 ft | 40.7° |
| P1 | 0.1 ft | 60.8° |
| Q1 | 0.1 ft | 37.6° |
| M2 | 0.1 ft | 205.7° |
| S2 | 0.1 ft | 216.1° |
The eight largest of 32. Source: NOAA CO-OPS harmonic constituents for 8747437, public domain.
The year as a print
The last two days, measured
At Sun, Oct 25 15:24 the gauge read 2.5 ft, 1.1 ft above the computed curve: wind and pressure, not the moon. The widest gap of the two days was 1.1 ft, at Sun, Oct 25 14:30.
- 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 04:00 | 2.13 ft | 1.07 ft | 1.09 ft |
| Sun, Oct 25 05:00 | 1.87 ft | 0.82 ft | 0.84 ft |
| Sun, Oct 25 06:00 | 1.60 ft | 0.62 ft | 0.64 ft |
| Sun, Oct 25 07:00 | 1.39 ft | 0.49 ft | 0.51 ft |
| Sun, Oct 25 08:00 | 1.29 ft | 0.45 ft | 0.46 ft |
| Sun, Oct 25 09:00 | 1.31 ft | 0.48 ft | 0.49 ft |
| Sun, Oct 25 10:00 | 1.44 ft | 0.59 ft | 0.59 ft |
| Sun, Oct 25 11:00 | 1.66 ft | 0.74 ft | 0.73 ft |
| Sun, Oct 25 12:00 | 1.88 ft | 0.90 ft | 0.88 ft |
| Sun, Oct 25 13:00 | 2.11 ft | 1.05 ft | 1.03 ft |
| Sun, Oct 25 14:00 | 2.34 ft | 1.20 ft | 1.18 ft |
| Sun, Oct 25 15:00 | 2.44 ft | 1.33 ft | 1.31 ft |
Measured heights from NOAA CO-OPS station 8747437, preliminary, above mean lower low water. The print carries the computed curve only: one year, no weather.