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In the northern hemisphere high pressure systems are associated with
clockwise winds(anticyclonic) while low pressure systems are associated with
counterclockwise winds(cyclonic). This is opposite in the southern hemisphere
with counterclockwise highs and clockwise lows. Your location
with respect to a low will dictate whether the wind will "back" or "veer"
as the low passes. In the northern hemisphere if the low passes east of
your location the winds will "back" from NE ,N, NW,  to W and if the low passes
west of your location then winds will "veer" from NE, E, SE, to S.

By applying Buys Ballot's Law you can determine the location of the center
of the low and
predict it's path with either "backing" or "veering" winds.

Capt Joe Kliment
W3HZM
Middletown,De.

   

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