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Storm-relative Helicitity (SRH) in mē/sē = colors
Bunkers Storm Motion barbs determines the movement of supercells.
Barbs indicate direction and speed. Wind speed is indicated in knots. Wind barbs always point in the direction the wind is blowing "from". A short barb means 5 knots, a long barb means 10 knots. (check: wind speed converter)
In the above example the orientation of the wind barb indicates winds from the northeast with a speed of 15 knots.
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