This Doppler radar image from the National Weather Service in Yuma shows the northern portions of Baja as far south as Puertecitos. The color scheme (see scale at right hand side of the picture) indicates the amount of rain (in inches) that the radar system has detected in the past hour. When you see the lightest blue color, which means less than a tenth of an inch of rain, this is almost always an indication that there is water in the local atmosphere but it is unlikely to be falling as rain.
A general view showing the estimated rainfall over the past day in the US mainland and the border region with Mexico is shown below. The scale is inches of rain in the past 24 hours.