You are given the lower right (six-hour precipitation and vertical motion) and lower left (700-mb relative humidity and 700-mb heights) 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...