Short wavelets, glassy wave crests. Leaves and twigs move around. Light weight flags extended. Moves thin branches, raises dust and paper. Fairly frequent whitecaps appear.
Small trees sway.
Moderate waves, many white foam crests. Some spray on the sea surface. Large trees begin to sway, noticeably difficult to walk. Foam from waves blown in streaks. Small branches broken from trees, walking in wind is very difficult.