PAINTED SHORES
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AK · NOAA 9455920 · 61° 14′ N · 149° 53′ W
Tides at Anchorage
A semidiurnal tide (form factor 0.23), toward spring this week. Predicted from the station's 37 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, 1:38 PM | Low | 4.0 ft |
| Sun, Oct 25, 7:05 PM | High | 31.7 ft |
| Mon, Oct 26, 2:09 AM | Low | -0.5 ft |
| Mon, Oct 26, 7:50 AM | High | 30.6 ft |
| Mon, Oct 26, 2:20 PM | Low | 4.6 ft |
| Mon, Oct 26, 7:35 PM | High | 32.3 ft |
| Tue, Oct 27, 2:52 AM | Low | -1.2 ft |
| Tue, Oct 27, 8:31 AM | High | 30.5 ft |
| Tue, Oct 27, 3:02 PM | Low | 5.2 ft |
| Tue, Oct 27, 8:06 PM | High | 32.5 ft |
| Wed, Oct 28, 3:35 AM | Low | -1.4 ft |
| Wed, Oct 28, 9:14 AM | High | 30.0 ft |
| Wed, Oct 28, 3:45 PM | Low | 5.9 ft |
| Wed, Oct 28, 8:42 PM | High | 32.2 ft |
| Thu, Oct 29, 4:19 AM | Low | -1.1 ft |
| Thu, Oct 29, 10:02 AM | High | 29.0 ft |
| Thu, Oct 29, 4:30 PM | Low | 6.6 ft |
| Thu, Oct 29, 9:24 PM | High | 31.2 ft |
| Fri, Oct 30, 5:05 AM | Low | -0.3 ft |
| Fri, Oct 30, 10:56 AM | High | 27.9 ft |
| Fri, Oct 30, 5:20 PM | Low | 7.5 ft |
| Fri, Oct 30, 10:15 PM | High | 29.5 ft |
| Sat, Oct 31, 5:57 AM | Low | 1.0 ft |
| Sat, Oct 31, 11:59 AM | High | 26.7 ft |
| Sat, Oct 31, 6:17 PM | Low | 8.3 ft |
| Sat, Oct 31, 11:23 PM | High | 27.2 ft |
| Sun, Nov 1, 5:56 AM | Low | 2.5 ft |
The constants that make it
| Constituent | Amplitude | Phase |
|---|---|---|
| M2 | 11.5 ft | 105.2° |
| S2 | 3.2 ft | 147.4° |
| K1 | 2.2 ft | 342.1° |
| N2 | 2.0 ft | 79.2° |
| O1 | 1.2 ft | 325.0° |
| M4 | 0.9 ft | 80.7° |
| K2 | 0.9 ft | 138.1° |
| MU2 | 0.7 ft | 234.0° |
The eight largest of 37. Source: NOAA CO-OPS harmonic constituents for 9455920, public domain.
The year as a print
The last two days, measured
Station 9455920 has no water-level gauge: NOAA publishes its prediction here, not a measurement. The computed curve stands alone, and the week's table above is its check.
- Computed here, from the constants
- NOAA's own prediction
- Measured at the gauge, every six minutes
Measured heights from NOAA CO-OPS station 9455920, preliminary, above mean lower low water. The print carries the computed curve only: one year, no weather.