Beaufort Wind Speed Scale

Beaufort Wind Scale, Inland Lake Version
Wind Speed & Observed Effects

Force Mph Water Conditions Observable Phenomena Windsurfer comments
0 <1 absolutely glassy trees perfectly still Damn!
1 0-5 jetskis out in force birds circle overhead (*%^&(*
2 0-10 mirage whitecaps faint rustling in trees "It's buildin'!"
3 0-12 faint ripples Gentle breeze "Shoulda bought a wide-tail!"
4 0-15 kites rise only to plummet seconds later NOAA continues to say: 10-15 "Was that a bird or a whitecap?"
5a 2-18 occasional patches of whitecaps parking lot begins to fill "In the footstraps twice already!"
5b 18-2 many whitecaps close to shore short gusts, long lulls "Why did I sail all the way over here?!"
6 2-26 dark bands on the water on the other side of the lake one sailor rigs a 4.0 "I'll be planing all the time!"
7 8-29 huge 2 ft. swells atomic power plant plume nearly horizontal "It's crankin'!"
8 11-35 whole lake covered in whitecaps newbies drift hopelessly downwind "It's nukin'!!!!!"
9 8-40 entire lake covered in whitecaps except those spots where you try to jibe unattended boards tumble downwind "Holy shit!"


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Last revised: April 15, 2000.