Coastal Skipper and Yachtmaster Quiz · Meteorology
How would a Met Office marine forecast describe the pressure change shown on this barograph over the last three hours?
A barograph trace of pressure in hectopascals over the last three hours, on a grid with a line every 2 hPa and every hour. The trace falls steadily from 1012 at 0900 to 1007 at 1200.
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Falling quickly. The pressure has dropped 5 hPa in three hours. The Met Office terms are: slowly for 0.1 to 1.5 hPa in the preceding three hours, falling or rising with no qualifier for 1.6 to 3.5, quickly for 3.6 to 6.0, and very rapidly for more than 6.0. A fall this fast is a warning of strong winds on the way.
