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- Q162 - Navigation General: Near Coastal
275. What do widely spaced isobars on a weather map indicate?
Widely spaced isobars indicate a weak pressure gradient, resulting in gentle breezes. Isobars represent lines of equal atmospheric pressure; closely spaced isobars signify a strong pressure gradient and high winds, while widely spaced isobars indicate a weak gradient and light winds. Wind speed is directly related to the pressure gradient, not precipitation type or tornado potential.
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