Wind gust World Meteorological Organization. Any significant variation at this mean wind during the ten minutes preceding the observation are noted as gusts in messages such as METAR. It is generally reported in METAR when the peak wind speed reaches at least 16 knots and the variation in wind speed between the peaks and average wind is at least 9 to 10 knots. In marine meteorology, the top speed of a burst is expressed in meters per second (m/s) or in knots, while the Beaufort scale is used for reporting the mean speed. When the maximum speed exceeds the average speed by
Ode to the West Wind a prophet who does not only bring "black rain, and fire, and hail" (28), but who "will burst" (28) it. The "locks of the approaching storm" (23) are the messengers of this bursting: the "clouds". Shelley also mentions that when the West Wind blows, it seems to be singing a funeral song about the year coming to an end and that the sky covered with a dome of clouds looks like a "sepulchre", i.e., a burial chamber or grave for the dying year or the year which is coming to an end. Shelley in this canto "expands his vision from