Meteorology · Tropical Cyclones — Buys Ballot
Applying Buys Ballot's law in the Northern Hemisphere, if you face the wind the center of low pressure is to your:
- ALeft and slightly behind
- BDirectly behind
- CDirectly ahead
- DRight and slightly behind✓ Correct
Explanation
In the NH, with the wind at your back the low is on your left; therefore facing into the wind the low is to your right (and somewhat behind, because surface wind crosses the isobars inward). This helps locate a storm center.
Authority: Bowditch (Pub. No. 9), Buys Ballot's law
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