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GA · NOAA 8670870 · 32° 02′ N · 80° 54′ W
Tides at Fort Pulaski
A semidiurnal tide (form factor 0.16), spring this week. Predicted from the station's 34 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, 8:09 PM | High | 7.7 ft |
| Mon, Oct 26, 2:29 AM | Low | 0.0 ft |
| Mon, Oct 26, 8:28 AM | High | 8.8 ft |
| Mon, Oct 26, 3:06 PM | Low | 0.3 ft |
| Mon, Oct 26, 8:54 PM | High | 7.7 ft |
| Tue, Oct 27, 3:16 AM | Low | -0.1 ft |
| Tue, Oct 27, 9:14 AM | High | 8.9 ft |
| Tue, Oct 27, 3:56 PM | Low | 0.3 ft |
| Tue, Oct 27, 9:41 PM | High | 7.5 ft |
| Wed, Oct 28, 4:05 AM | Low | -0.2 ft |
| Wed, Oct 28, 10:04 AM | High | 8.9 ft |
| Wed, Oct 28, 4:46 PM | Low | 0.4 ft |
| Wed, Oct 28, 10:32 PM | High | 7.3 ft |
| Thu, Oct 29, 4:55 AM | Low | -0.0 ft |
| Thu, Oct 29, 10:58 AM | High | 8.7 ft |
| Thu, Oct 29, 5:38 PM | Low | 0.6 ft |
| Thu, Oct 29, 11:30 PM | High | 7.1 ft |
| Fri, Oct 30, 5:48 AM | Low | 0.2 ft |
| Fri, Oct 30, 11:59 AM | High | 8.4 ft |
| Fri, Oct 30, 6:34 PM | Low | 0.8 ft |
| Sat, Oct 31, 12:36 AM | High | 6.9 ft |
| Sat, Oct 31, 6:45 AM | Low | 0.5 ft |
| Sat, Oct 31, 1:05 PM | High | 8.1 ft |
| Sat, Oct 31, 7:34 PM | Low | 1.0 ft |
| Sun, Nov 1, 1:45 AM | High | 6.9 ft |
| Sun, Nov 1, 6:49 AM | Low | 0.7 ft |
| Sun, Nov 1, 1:11 PM | High | 7.9 ft |
The constants that make it
| Constituent | Amplitude | Phase |
|---|---|---|
| M2 | 3.3 ft | 17.5° |
| N2 | 0.7 ft | 2.1° |
| S2 | 0.5 ft | 45.3° |
| K1 | 0.4 ft | 200.0° |
| SA | 0.4 ft | 174.2° |
| SSA | 0.3 ft | 52.9° |
| O1 | 0.3 ft | 205.2° |
| L2 | 0.2 ft | 9.4° |
The eight largest of 34. Source: NOAA CO-OPS harmonic constituents for 8670870, public domain.
The year as a print
The last two days, measured
At Sun, Oct 25 16:24 the gauge read 3.8 ft, 1.0 ft above the computed curve: wind and pressure, not the moon. The widest gap of the two days was 3.0 ft, at Sat, Oct 24 22:54.
- 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 05:00 | 5.90 ft | 5.24 ft | 5.24 ft |
| Sun, Oct 25 06:00 | 7.62 ft | 7.10 ft | 7.09 ft |
| Sun, Oct 25 07:00 | 8.87 ft | 8.22 ft | 8.22 ft |
| Sun, Oct 25 08:00 | 9.54 ft | 8.43 ft | 8.44 ft |
| Sun, Oct 25 09:00 | 9.58 ft | 7.78 ft | 7.78 ft |
| Sun, Oct 25 10:00 | 8.52 ft | 6.44 ft | 6.45 ft |
| Sun, Oct 25 11:00 | 6.92 ft | 4.69 ft | 4.70 ft |
| Sun, Oct 25 12:00 | 5.31 ft | 2.88 ft | 2.89 ft |
| Sun, Oct 25 13:00 | 3.65 ft | 1.34 ft | 1.35 ft |
| Sun, Oct 25 14:00 | 2.44 ft | 0.52 ft | 0.53 ft |
| Sun, Oct 25 15:00 | 2.18 ft | 0.78 ft | 0.79 ft |
| Sun, Oct 25 16:00 | 3.39 ft | 2.08 ft | 2.09 ft |
Measured heights from NOAA CO-OPS station 8670870, preliminary, above mean lower low water. The print carries the computed curve only: one year, no weather.