Map: 24-hour Precipitable Water in Inches for October 20, 2016 12Z

This is a contour plot of precipitable water in inches. The contour interval is .2 inches. Precipitatable water reflects the amount of water contained in a vertical column above the surface if it were all precipitated out. This is a good indicator of how much rain or snow might fall as a result of a thunderstorm or low pressure system.