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CA · NOAA 9410660 · 33° 43′ N · 118° 16′ W
Tides at Los Angeles
A mixed, mainly semidiurnal tide (form factor 0.78), spring this week. Predicted from the station's 23 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, 3:31 PM | Low | -0.4 ft |
| Sun, Oct 25, 9:45 PM | High | 4.6 ft |
| Mon, Oct 26, 3:04 AM | Low | 1.5 ft |
| Mon, Oct 26, 9:17 AM | High | 6.6 ft |
| Mon, Oct 26, 4:14 PM | Low | -0.7 ft |
| Mon, Oct 26, 10:34 PM | High | 4.3 ft |
| Tue, Oct 27, 3:34 AM | Low | 1.8 ft |
| Tue, Oct 27, 9:51 AM | High | 6.8 ft |
| Tue, Oct 27, 5:02 PM | Low | -0.8 ft |
| Tue, Oct 27, 11:30 PM | High | 4.0 ft |
| Wed, Oct 28, 4:07 AM | Low | 2.2 ft |
| Wed, Oct 28, 10:30 AM | High | 6.7 ft |
| Wed, Oct 28, 5:55 PM | Low | -0.7 ft |
| Thu, Oct 29, 12:36 AM | High | 3.7 ft |
| Thu, Oct 29, 4:45 AM | Low | 2.6 ft |
| Thu, Oct 29, 11:15 AM | High | 6.5 ft |
| Thu, Oct 29, 6:57 PM | Low | -0.5 ft |
| Fri, Oct 30, 2:02 AM | High | 3.5 ft |
| Fri, Oct 30, 5:33 AM | Low | 3.0 ft |
| Fri, Oct 30, 12:10 PM | High | 6.0 ft |
| Fri, Oct 30, 8:09 PM | Low | -0.3 ft |
| Sat, Oct 31, 3:46 AM | High | 3.6 ft |
| Sat, Oct 31, 6:57 AM | Low | 3.3 ft |
| Sat, Oct 31, 1:22 PM | High | 5.5 ft |
| Sat, Oct 31, 9:27 PM | Low | -0.1 ft |
| Sun, Nov 1, 4:03 AM | High | 4.0 ft |
| Sun, Nov 1, 8:10 AM | Low | 3.3 ft |
The constants that make it
| Constituent | Amplitude | Phase |
|---|---|---|
| M2 | 1.7 ft | 145.5° |
| K1 | 1.1 ft | 207.7° |
| O1 | 0.7 ft | 192.3° |
| S2 | 0.7 ft | 141.1° |
| N2 | 0.4 ft | 123.7° |
| P1 | 0.4 ft | 204.6° |
| SA | 0.2 ft | 184.4° |
| K2 | 0.2 ft | 135.5° |
The eight largest of 23. Source: NOAA CO-OPS harmonic constituents for 9410660, public domain.
The year as a print
The last two days, measured
At Sun, Oct 25 12:36 the gauge read 3.6 ft, 1.3 ft above the computed curve: wind and pressure, not the moon. The widest gap of the two days was 1.5 ft, at Sat, Oct 24 11:42.
- 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 01:00 | 3.20 ft | 1.85 ft | 1.83 ft |
| Sun, Oct 25 02:00 | 2.63 ft | 1.27 ft | 1.25 ft |
| Sun, Oct 25 03:00 | 2.54 ft | 1.21 ft | 1.21 ft |
| Sun, Oct 25 04:00 | 3.07 ft | 1.76 ft | 1.76 ft |
| Sun, Oct 25 05:00 | 4.14 ft | 2.79 ft | 2.81 ft |
| Sun, Oct 25 06:00 | 5.41 ft | 4.07 ft | 4.09 ft |
| Sun, Oct 25 07:00 | 6.66 ft | 5.28 ft | 5.31 ft |
| Sun, Oct 25 08:00 | 7.47 ft | 6.10 ft | 6.14 ft |
| Sun, Oct 25 09:00 | 7.65 ft | 6.30 ft | 6.35 ft |
| Sun, Oct 25 10:00 | 7.15 ft | 5.81 ft | 5.86 ft |
| Sun, Oct 25 11:00 | 6.18 ft | 4.71 ft | 4.75 ft |
| Sun, Oct 25 12:00 | 4.68 ft | 3.22 ft | 3.26 ft |
Measured heights from NOAA CO-OPS station 9410660, preliminary, above mean lower low water. The print carries the computed curve only: one year, no weather.