National Network of Regional Coastal Monitoring Programmes
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Wave Spectra for 21/04/2024 16:30 GMT
Note that these are real-time data and are not quality-controlled. Long-range graphs are plotted from a randomised subsample of half-hourly data.
Second Severn Crossing
Tide Levels and Harmonics Wave Spectra for 21/04/2024 16:30 GMT
Wave Spectra page developed in conjunction with Fugro GB Limited.
Wave Spectra page developed in conjunction with Fugro GB Limited.
Sea and Swell Summary for (21/04/2024 16:30 GMT) | |
---|---|
Significant Wave Height (m) | 0.1 |
Wave zero up crossing period (Spectrum Tz) (s) | 5.8 |
Wind Wave Significant Wave Height (m) | 0.04 |
Wind Wave Peak Period (s) | 5.8 |
Wind Wave Peak Period Direction (°) | 0 |
Swell Significant Wave Height (m) | 0.02 |
Swell Peak Period (s) | 25.6 |
Swell Peak Period Direction (°) | 0 |
% Swell | 13.8 |
Wave Spectra for date 21/04/2024 16:30:
Frequency (Hz) | Period (s) | Normalised Energy | Energy |
---|---|---|---|
0.0313 | 31.9 | 0.58 | 0 |
0.0391 | 25.6 | 0.783 | 0 |
0.0469 | 21.3 | 0.632 | 0 |
0.0547 | 18.3 | 0.618 | 0 |
0.0625 | 16 | 0.613 | 0 |
0.0703 | 14.2 | 0.577 | 0 |
0.0781 | 12.8 | 0.574 | 0 |
0.0859 | 11.6 | 0.549 | 0 |
0.0937 | 10.7 | 0.574 | 0 |
0.1016 | 9.8 | 0.621 | 0 |
0.1094 | 9.1 | 0.668 | 0 |
0.1172 | 8.5 | 0.712 | 0 |
0.1250 | 8 | 0.797 | 0 |
0.1328 | 7.5 | 0.885 | 0 |
0.1406 | 7.1 | 0.956 | 0 |
0.1484 | 6.7 | 0.97 | 0 |
0.1563 | 6.4 | 1 | 0 |
0.1641 | 6.1 | 1 | 0 |
0.1719 | 5.8 | 1 | 0 |
0.1797 | 5.6 | 0.948 | 0 |
0.1875 | 5.3 | 0.885 | 0 |
0.1953 | 5.1 | 0.819 | 0 |
0.2031 | 4.9 | 0.777 | 0 |
0.2109 | 4.7 | 0.701 | 0 |
0.2188 | 4.6 | 0.599 | 0 |
0.2266 | 4.4 | 0.511 | 0 |
0.2344 | 4.3 | 0.489 | 0 |
0.2422 | 4.1 | 0.47 | 0 |
0.2500 | 4 | 0.456 | 0 |
0.2578 | 3.9 | 0.448 | 0 |
0.2656 | 3.8 | 0.442 | 0 |
0.2734 | 3.7 | 0.44 | 0 |
0.2812 | 3.6 | 0.437 | 0 |
0.2891 | 3.5 | 0.431 | 0 |
0.2969 | 3.4 | 0.423 | 0 |
0.3047 | 3.3 | 0.418 | 0 |
0.3125 | 3.2 | 0.412 | 0 |
0.3203 | 3.1 | 0.387 | 0 |
0.3281 | 3 | 0.36 | 0 |
0.3359 | 3 | 0.354 | 0 |
0.3437 | 2.9 | 0.338 | 0 |
0.3516 | 2.8 | 0.319 | 0 |
0.3594 | 2.8 | 0.31 | 0 |
0.3672 | 2.7 | 0.297 | 0 |
0.3750 | 2.7 | 0.302 | 0 |
0.3828 | 2.6 | 0.305 | 0 |
0.3906 | 2.6 | 0.299 | 0 |
0.3984 | 2.5 | 0.286 | 0 |
0.4063 | 2.5 | 0.291 | 0 |
0.4141 | 2.4 | 0.299 | 0 |
0.4219 | 2.4 | 0.286 | 0 |
0.4297 | 2.3 | 0.294 | 0 |
0.4375 | 2.3 | 0.297 | 0 |
0.4453 | 2.2 | 0.294 | 0 |
0.4531 | 2.2 | 0.308 | 0 |
0.4609 | 2.2 | 0.28 | 0 |
0.4688 | 2.1 | 0.272 | 0 |
0.4766 | 2.1 | 0.266 | 0 |
0.4844 | 2.1 | 0.264 | 0 |
0.4922 | 2 | 0.25 | 0 |
0.5000 | 2 | 0.242 | 0 |
0.5078 | 2 | 0.239 | 0 |
0.5156 | 1.9 | 0.231 | 0 |
0.5235 | 1.9 | 0.239 | 0 |
0.5312 | 1.9 | 0.234 | 0 |
0.5391 | 1.9 | 0.217 | 0 |
0.5469 | 1.8 | 0.214 | 0 |
0.5547 | 1.8 | 0.203 | 0 |
0.5625 | 1.8 | 0.201 | 0 |
0.5703 | 1.8 | 0.203 | 0 |
0.5781 | 1.7 | 0.201 | 0 |
0.5859 | 1.7 | 0.195 | 0 |
0.5938 | 1.7 | 0.198 | 0 |
0.6016 | 1.7 | 0.192 | 0 |
0.6094 | 1.6 | 0.184 | 0 |
0.6172 | 1.6 | 0.181 | 0 |
0.6250 | 1.6 | 0.181 | 0 |
0.6328 | 1.6 | 0.176 | 0 |
0.6406 | 1.6 | 0.176 | 0 |
0.6484 | 1.5 | 0.181 | 0 |
0.6563 | 1.5 | 0.176 | 0 |
0.6641 | 1.5 | 0.176 | 0 |
0.6719 | 1.5 | 0.173 | 0 |
0.6797 | 1.5 | 0.176 | 0 |
0.6875 | 1.5 | 0.173 | 0 |
0.6953 | 1.4 | 0.168 | 0 |
0.7031 | 1.4 | 0.162 | 0 |
0.7109 | 1.4 | 0.151 | 0 |
0.7188 | 1.4 | 0.151 | 0 |
0.7266 | 1.4 | 0.151 | 0 |
0.7344 | 1.4 | 0.14 | 0 |
0.7422 | 1.3 | 0.137 | 0 |
0.7500 | 1.3 | 0.14 | 0 |
0.7578 | 1.3 | 0.137 | 0 |
0.7656 | 1.3 | 0.132 | 0 |
0.7735 | 1.3 | 0.132 | 0 |
0.7813 | 1.3 | 0.129 | 0 |
0.7891 | 1.3 | 0.132 | 0 |
0.7969 | 1.3 | 0.137 | 0 |
0.8047 | 1.2 | 0.146 | 0 |
0.8125 | 1.2 | 0.14 | 0 |
0.8203 | 1.2 | 0.146 | 0 |
0.8282 | 1.2 | 0.14 | 0 |
0.8359 | 1.2 | 0.129 | 0 |
0.8437 | 1.2 | 0.129 | 0 |
0.8516 | 1.2 | 0.121 | 0 |
0.8594 | 1.2 | 0.113 | 0 |
0.8672 | 1.2 | 0.113 | 0 |
0.8750 | 1.1 | 0.107 | 0 |
0.8828 | 1.1 | 0.096 | 0 |
0.8906 | 1.1 | 0.091 | 0 |
0.8985 | 1.1 | 0.082 | 0 |
0.9063 | 1.1 | 0.077 | 0 |