This week’s image was taken this morning. It is an enhanced water vapor image over the southwest.
This image shows the shortwave trough currently impacting the desert southwest. Notice the shades of blue (representing more moisture) making their way east into New Mexico and Colorado. This damper atmosphere is behind the leading edge of the trough.
As the trough passes through the area, temperatures will cool slightly, and become damper and cloudier.
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Source: College of DuPage – Meteorology