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4–7 mph 6–11 km/h 1.6–3.3 m/s 1–2 ft 0.3–0.6 m Small wavelets still short but more pronounced; crests have a glassy appearance but do not break Wind felt on face; leaves rustle; wind vane moved by wind 3 Gentle breeze 7–10 knots 8–12 mph 12–19 km/h 3.4–5.4 m/s 2–4 ft 0.6–1.2 m
The fastest wind speed not related to tornadoes ever recorded was during the passage of Tropical Cyclone Olivia on 10 April 1996: an automatic weather station on Barrow Island, Australia, registered a maximum wind gust of 113.3 m/s (408 km/h; 253 mph; 220.2 kn; 372 ft/s) [6] [7] The wind gust was evaluated by the WMO Evaluation Panel, who found ...
The knot (/ n ɒ t /) is a unit of speed equal to one nautical mile per hour, exactly 1.852 km/h (approximately 1.151 mph or 0.514 m/s). [1] [2] The ISO standard symbol for the knot is kn. [3]
In 2024 another proposal to add "Category 6" was made, with a minimum wind speed of 192 mph (309 km/h), with risk factors such as the effects of climate change and warming ocean temperatures part of that research. [30] In the NHC area of responsibility, only Patricia had winds greater than 190 mph (85 m/s; 165 kn; 305 km/h).
Average walking speed—below a speed of about 2 m/s, ... 320 km/h or 200 mph is a parameter sometimes used in ... The fastest wind speed ever recorded on ...
For zero-second wind speed measurements, it is assumed to be an instantaneous wind speed measurement. [ 4 ] [ 3 ] This can only be used if it was 10 Hz or higher sample rate. [ 4 ] [ 3 ] [ 6 ]
Wind speed (Estimated) Potential damage: Example of damage: mph: km/h: m/s: T0: 39 - 54: 61 - 86: 17 - 24 Light damage. Loose light litter such as paper, leaves and twigs raised from ground level in spirals. Secured tents and marquees seriously disturbed; a few exposed tiles/slates on roofs dislodged.
When the maximum speed exceeds the average speed by 10 to 15 knots (19 to 28 km/h; 12 to 17 mph), the term gusts is used while strong gusts is used for departure of 15 to 25 knots (28 to 46 km/h; 17 to 29 mph), and violent gusts when it exceeds 25 knots (46 km/h; 29 mph). [4]