Sunday, December 27, 2009

Does a tight pressure gradient at the surface mean that winds aloft will be weak?

Or can a tight pressure gradient at surface (which creates fast surface winds) still correspond to strong winds aloft?Does a tight pressure gradient at the surface mean that winds aloft will be weak?
Tight pressure gradients always mean strong wind, on surface or aloft. As a rule of thumb, seafarers say that if the barometer falls 10 millibars in 8 hours, a gale wind will certainly come.





Because of the drag induction of the surface, the wind aloft is always stronger. I know and experience that very often since I fly my own light aircraft. If the wind at the airfield is say, 10 knots, it wouldn't be surprising to experience 30 knots at only 2,000 feet of altitude.

No comments:

Post a Comment