Rotation vs. Color
Posted by
Cape_Fear_NC on 8/19/2009, 11:27 am
Dark areas are dry areas. Red areas are extremely dry areas.
Remember, Highs and Lows are about rotation, not color.
Surface lows usually have lots of color because they're stormy, upper level lows (ULLs) are typically whispy white anti-clockwise rotations surrounded by darkness. (They are lows in the upper atmosphere that don't exist down at the surface which is dry.)
Although Highs are typically dry, as I said before they certainly can have clouds. And just because an area is dry - that doesn't mean it's a High (there are other features such as convergence and divergence zones, boundary layers, etc. that can be confusing.
You can always just look at an ordinary weather map to see where the large scale Highs and Lows are! Don't let yourself get TOO confused by the minute details - not everything on the satellite is important - though your interest is to be applauded.
Tim |
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