The Uppy Downy Wind Flag
The Uppy/Downy flag identifies up drafts and downdraft winds found at ranges with baffles, berms, barriers, trees, gullies or swirling wind.
Read MoreThe Uppy/Downy flag identifies up drafts and downdraft winds found at ranges with baffles, berms, barriers, trees, gullies or swirling wind.
Read More