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CA · NOAA 9419750 · 41° 45′ N · 124° 11′ W
Tides at Crescent City
A mixed, mainly semidiurnal tide (form factor 0.70), spring this week. Predicted from the station's 24 harmonic constants; heights above mean lower low water, times in station time. Weather is not in these numbers.
This week
| When | Water | Height |
|---|---|---|
| Mon, Oct 26, 11:45 AM | High | 7.8 ft |
| Mon, Oct 26, 6:38 PM | Low | -1.1 ft |
| Tue, Oct 27, 1:10 AM | High | 6.2 ft |
| Tue, Oct 27, 6:23 AM | Low | 2.5 ft |
| Tue, Oct 27, 12:21 PM | High | 8.0 ft |
| Tue, Oct 27, 7:23 PM | Low | -1.4 ft |
| Wed, Oct 28, 2:03 AM | High | 6.1 ft |
| Wed, Oct 28, 7:05 AM | Low | 2.9 ft |
| Wed, Oct 28, 1:02 PM | High | 8.0 ft |
| Wed, Oct 28, 8:12 PM | Low | -1.4 ft |
| Thu, Oct 29, 2:59 AM | High | 5.9 ft |
| Thu, Oct 29, 7:51 AM | Low | 3.2 ft |
| Thu, Oct 29, 1:47 PM | High | 7.8 ft |
| Thu, Oct 29, 9:05 PM | Low | -1.2 ft |
| Fri, Oct 30, 4:00 AM | High | 5.7 ft |
| Fri, Oct 30, 8:46 AM | Low | 3.5 ft |
| Fri, Oct 30, 2:39 PM | High | 7.4 ft |
| Fri, Oct 30, 10:04 PM | Low | -0.9 ft |
| Sat, Oct 31, 5:07 AM | High | 5.6 ft |
| Sat, Oct 31, 9:54 AM | Low | 3.6 ft |
| Sat, Oct 31, 3:41 PM | High | 6.9 ft |
| Sat, Oct 31, 11:07 PM | Low | -0.5 ft |
| Sun, Nov 1, 5:15 AM | High | 5.6 ft |
| Sun, Nov 1, 10:19 AM | Low | 3.6 ft |
| Sun, Nov 1, 3:56 PM | High | 6.3 ft |
| Sun, Nov 1, 11:13 PM | Low | -0.1 ft |
| Mon, Nov 2, 6:17 AM | High | 5.9 ft |
The constants that make it
| Constituent | Amplitude | Phase |
|---|---|---|
| M2 | 2.3 ft | 211.0° |
| K1 | 1.3 ft | 227.8° |
| O1 | 0.8 ft | 212.6° |
| S2 | 0.6 ft | 231.7° |
| N2 | 0.5 ft | 185.2° |
| P1 | 0.4 ft | 225.2° |
| SA | 0.2 ft | 261.4° |
| K2 | 0.2 ft | 223.6° |
The eight largest of 24. Source: NOAA CO-OPS harmonic constituents for 9419750, public domain.
The year as a print
The last two days, measured
At Mon, Oct 26 10:48 the gauge read 8.0 ft, 0.5 ft above the computed curve: wind and pressure, not the moon. The widest gap of the two days was 0.8 ft, at Mon, Oct 26 09:18.
- 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 23:00 | 6.11 ft | 5.52 ft | 5.48 ft |
| Mon, Oct 26 00:00 | 6.73 ft | 6.14 ft | 6.10 ft |
| Mon, Oct 26 01:00 | 6.73 ft | 6.03 ft | 5.99 ft |
| Mon, Oct 26 02:00 | 5.70 ft | 5.29 ft | 5.25 ft |
| Mon, Oct 26 03:00 | 4.81 ft | 4.18 ft | 4.16 ft |
| Mon, Oct 26 04:00 | 3.60 ft | 3.07 ft | 3.05 ft |
| Mon, Oct 26 05:00 | 2.89 ft | 2.30 ft | 2.29 ft |
| Mon, Oct 26 06:00 | 2.78 ft | 2.13 ft | 2.13 ft |
| Mon, Oct 26 07:00 | 3.18 ft | 2.67 ft | 2.68 ft |
| Mon, Oct 26 08:00 | 4.52 ft | 3.80 ft | 3.82 ft |
| Mon, Oct 26 09:00 | 5.94 ft | 5.25 ft | 5.28 ft |
| Mon, Oct 26 10:00 | 7.24 ft | 6.64 ft | 6.68 ft |
Measured heights from NOAA CO-OPS station 9419750, preliminary, above mean lower low water. The print carries the computed curve only: one year, no weather.