PAINTED SHORES
MENUBegin
FL · NOAA 8724580 · 24° 33′ N · 81° 48′ W
Tides at Key West
A mixed, mainly semidiurnal tide (form factor 0.76), 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, 9:45 PM | High | 2.4 ft |
| Mon, Oct 26, 4:13 AM | Low | 0.1 ft |
| Mon, Oct 26, 11:05 AM | High | 1.9 ft |
| Mon, Oct 26, 3:53 PM | Low | 0.9 ft |
| Mon, Oct 26, 10:22 PM | High | 2.5 ft |
| Tue, Oct 27, 4:59 AM | Low | -0.0 ft |
| Tue, Oct 27, 11:54 AM | High | 1.7 ft |
| Tue, Oct 27, 4:27 PM | Low | 0.9 ft |
| Tue, Oct 27, 11:03 PM | High | 2.5 ft |
| Wed, Oct 28, 5:48 AM | Low | -0.1 ft |
| Wed, Oct 28, 12:45 PM | High | 1.6 ft |
| Wed, Oct 28, 5:03 PM | Low | 0.9 ft |
| Wed, Oct 28, 11:48 PM | High | 2.5 ft |
| Thu, Oct 29, 6:41 AM | Low | -0.0 ft |
| Thu, Oct 29, 1:38 PM | High | 1.4 ft |
| Thu, Oct 29, 5:44 PM | Low | 0.9 ft |
| Fri, Oct 30, 12:40 AM | High | 2.5 ft |
| Fri, Oct 30, 7:41 AM | Low | 0.1 ft |
| Fri, Oct 30, 2:37 PM | High | 1.4 ft |
| Fri, Oct 30, 6:33 PM | Low | 0.9 ft |
| Sat, Oct 31, 1:38 AM | High | 2.4 ft |
| Sat, Oct 31, 8:49 AM | Low | 0.3 ft |
| Sat, Oct 31, 3:45 PM | High | 1.3 ft |
| Sat, Oct 31, 7:39 PM | Low | 1.0 ft |
| Sun, Nov 1, 1:48 AM | High | 2.2 ft |
| Sun, Nov 1, 9:00 AM | Low | 0.4 ft |
The constants that make it
| Constituent | Amplitude | Phase |
|---|---|---|
| M2 | 0.6 ft | 66.9° |
| SA | 0.3 ft | 183.1° |
| O1 | 0.3 ft | 351.9° |
| K1 | 0.3 ft | 354.8° |
| S2 | 0.2 ft | 89.4° |
| SSA | 0.2 ft | 57.6° |
| N2 | 0.1 ft | 48.9° |
| P1 | 0.1 ft | 357.8° |
The eight largest of 32. Source: NOAA CO-OPS harmonic constituents for 8724580, public domain.
The year as a print
The last two days, measured
At Sun, Oct 25 16:24 the gauge read 2.1 ft, 1.1 ft above the computed curve: wind and pressure, not the moon. The widest gap of the two days was 1.3 ft, at Sat, Oct 24 21:00.
- 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 | 1.65 ft | 0.50 ft | 0.50 ft |
| Sun, Oct 25 06:00 | 1.92 ft | 0.83 ft | 0.83 ft |
| Sun, Oct 25 07:00 | 2.25 ft | 1.20 ft | 1.19 ft |
| Sun, Oct 25 08:00 | 2.59 ft | 1.54 ft | 1.53 ft |
| Sun, Oct 25 09:00 | 2.90 ft | 1.82 ft | 1.80 ft |
| Sun, Oct 25 10:00 | 3.06 ft | 1.96 ft | 1.95 ft |
| Sun, Oct 25 11:00 | 3.00 ft | 1.92 ft | 1.90 ft |
| Sun, Oct 25 12:00 | 2.76 ft | 1.69 ft | 1.68 ft |
| Sun, Oct 25 13:00 | 2.43 ft | 1.35 ft | 1.34 ft |
| Sun, Oct 25 14:00 | 2.08 ft | 1.04 ft | 1.03 ft |
| Sun, Oct 25 15:00 | 1.91 ft | 0.87 ft | 0.86 ft |
| Sun, Oct 25 16:00 | 1.96 ft | 0.90 ft | 0.90 ft |
Measured heights from NOAA CO-OPS station 8724580, preliminary, above mean lower low water. The print carries the computed curve only: one year, no weather.