You are given the lower right (six-hour precipitation and vertical motion) and lower left (700-mb relative humidity and 700-mb h
eights) panels of a 4-panel prog. On the lower left-hand panel, there is a broad swath of low relative humidity at 700 mb that is predicted to extend eastward across northern Mexico into Texas. Notice, however, that the model predicts that there will be a gap in the low relative humidity over southern and central Texas (note at point P the relative humidity is greater than 50%). This "break" constitutes a local maximum in relative humidity. This predicted maximum will result because...
In this case of a "generic" low-pressure system over the central United States, the statistical correlation between rather high 700-mb relative humidity on a bottom-left panel (left) from a four-panel prog (not shown here) and the presence and corresponding pattern of clouds (right) is strong
We can create a logical way to transfer coordinates from the sphere onto a flat map. Such ways of transferring coordinates are known as projections, after the original method of transferring by literally projecting a light through a globe onto a surface. But no projection can accomplish its task without some distortion.
