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Downhill Notations
Qualité quand ça marche: 2.0
Consistance des Vagues: 3.0

Général: 3.3

Voir toutes les 18 notations

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Surf Report Feed

Statistiques de Houle pour Downhill, Automne: Vagues avec Vents Légers ou Favorables.

The rose diagram shows only the swells directed at Downhill that coincided with light winds or offshore conditions over a normal northern hemisphere autumn and is based upon 8476 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours illustrate increasing wave sizes. Blue shows the smallest swells, less that 0.5m (1.5 feet) high. Green and yellow illustrate increasing swell sizes and red shows largest swells greater than >3m (>10ft). In both graphs, the area of any colour is proportional to how commonly that size swell happens.

The diagram implies that the most common swell direction, shown by the largest spokes, was WNW, whereas the the most common wind blows from the SW. The chart at the bottom shows the same thing but without direction information. For example, swells larger than 1.5 feet (0.5m) coincided with good wind conditions 18% of the time, equivalent to 16 days. Open water swells exceeding >3m (>10ft) only arise 0.7% of the time in a typical northern hemisphere autumn, equivalent to just one day but 6% of the time we expect swell in the range 2-3m (6.5-10ft) 6%, equivalent to (5 days). Taking into account the fraction of these swells that coincided with predicted offshore winds, and given the fact that Downhill is slightly protected from open water swells, we calculate that clean surf can be found at Downhill about 18% of the time and that surf is messed up by onshore wind 50% of the time. This is means that we expect 62 days with waves in a typical northern hemisphere autumn, of which 16 days should be surfable.

IMPORTANT: Beta version feature! Swell heights are open water values from NWW3. There is no attempt to model near-shore effects. Coastal wave heights will generally be less, especially if the break does not have unobstructed exposure to the open ocean.