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From 19 February 2020, the ERA5 system examines the 10m wind components and if the magnitude of either component exceeds 50 ms-1, then the analysed parameters are replaced with the "4v" parameters. These latter parameters are similar to the analysed ones, but don't usually suffer from such large values.
The choice of a 50 ms-1 cut off is an arbitrary one, which could miss spurious values that are less than 50 ms-1. It is also possible, that this cut off point could penalise realistic winds, such as in hurricanes. However, given the spatial resolution of ERA5 data, it is thought that in general, 10m wind components higher than 50 ms-1 are not realistic, even if the observed magnitude is higher - this has been seen in at least one case of a hurricane.
The tables below, for January 1979 to 18 February 2020, give details when the 10m wind components , (the 10 metre U wind component and 10 metre V wind component, ) exceed 50 ms-1. This value is an arbitrary one, which may capture real wind events, such as hurricanes and typhoons.
| Date | Time | Latitude | Longitude | 10m U |
|---|---|---|---|---|
19790417 | 900 | -74.051 | 164.160 | 7.2323150635e+01 |
19800330 | 700 | -1.827 | 280.406 | -5.9812698364e+01 |
19800330 | 800 | -1.827 | 280.406 | -9.8439865112e+01 |
19800330 | 900 | -1.827 | 280.406 | -7.1381820679e+01 |
19820908 | 700 | -74.051 | 164.160 | -6.9596405029e+01 |
19820908 | 800 | -74.051 | 164.160 | -5.2189117432e+01 |
19821024 | 2100 | -74.051 | 164.160 | -1.5377770996e+02 |
19841004 | 700 | -74.051 | 164.160 | -5.5174591064e+01 |
19841004 | 800 | -74.051 | 164.160 | -6.8660507202e+01 |
19841004 | 900 | -74.051 | 165.120 | -7.1647964478e+01 |
19860724 | 800 | -74.051 | 164.160 | -8.8280364990e+01 |
19860724 | 900 | -74.051 | 164.160 | -2.9203100586e+02 |
19871016 | 2000 | -74.051 | 164.160 | -9.4200180054e+01 |
19871016 | 2100 | -74.051 | 164.160 | -1.5219485474e+02 |
19890711 | 2100 | 38.080 | 78.333 | 7.0804840088e+01 |
19890912 | 800 | -74.051 | 164.160 | -8.3815658569e+01 |
19890912 | 900 | -74.051 | 164.160 | -1.6730293274e+02 |
19900402 | 700 | -74.051 | 164.160 | 5.8469223022e+01 |
19930624 | 600 | -74.051 | 164.160 | 6.0172592163e+01 |
19930624 | 700 | -74.051 | 164.160 | 1.0357415771e+02 |
19930624 | 800 | -74.051 | 164.160 | 7.8659744263e+01 |
19930624 | 900 | -74.051 | 164.160 | 5.5145812988e+01 |
19930705 | 2000 | 38.080 | 78.333 | 8.0320663452e+01 |
19930705 | 2100 | 38.361 | 78.398 | 5.9963912964e+01 |
19940914 | 2100 | -74.051 | 164.160 | -7.9331817627e+01 |
19970607 | 700 | -74.051 | 164.160 | 5.8002792358e+01 |
19970607 | 800 | -74.051 | 164.160 | 1.0099096680e+02 |
19970923 | 1900 | -74.051 | 164.160 | 1.3710269165e+02 |
20010423 | 2100 | -74.051 | 164.160 | -8.0685379028e+01 |
20040327 | 800 | -74.051 | 164.160 | -6.4567825317e+01 |
20050314 | 800 | -1.827 | 280.406 | -6.1867416382e+01 |
20050314 | 900 | -1.827 | 280.406 | -9.2169509888e+01 |
20060304 | 900 | -1.827 | 280.125 | -6.3722732544e+01 |
20060328 | 800 | -1.827 | 280.406 | -5.7734420776e+01 |
20060328 | 900 | -1.827 | 280.406 | -1.1018218994e+02 |
20070331 | 2100 | -74.051 | 164.160 | 8.7419113159e+01 |
20090303 | 700 | -1.827 | 280.406 | -8.9056137085e+01 |
20090303 | 800 | -1.827 | 280.406 | -1.3375457764e+02 |
20090303 | 900 | -1.827 | 280.406 | -2.0406346130e+02 |
20091218 | 2100 | 43.138 | 75.000 | -5.9425277710e+01 |
20100325 | 900 | -1.827 | 280.688 | -5.4004959106e+01 |
20110127 | 900 | -1.827 | 280.406 | -5.3115798950e+01 |
20111224 | 2100 | 43.138 | 75.000 | -6.8307769775e+01 |
20130719 | 2100 | -74.051 | 164.160 | -6.1746520996e+01 |
20140426 | 700 | -1.265 | 280.688 | 5.7151275635e+01 |
20140426 | 700 | -1.546 | 280.406 | -8.5247161865e+01 |
20140426 | 800 | -1.265 | 280.688 | 7.2114089966e+01 |
20140426 | 800 | -1.546 | 280.406 | -1.4157341003e+02 |
20140426 | 900 | -1.546 | 280.406 | -2.0927426147e+02 |
20160522 | 2000 | -74.051 | 164.160 | -6.6684082031e+01 |
20160522 | 2100 | -74.051 | 164.160 | -5.9349365234e+01 |
20160929 | 2100 | -74.051 | 164.160 | 6.5295028687e+01 |
20161128 | 2100 | 42.857 | 75.375 | -5.2441085815e+01 |
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