PHOENIX -- The high clouds we saw around much of the day on Tuesday and Tuesday night are signaling the start of a change in our overall weather pattern. From the ridge of high pressure that brought us the warm weather, we’ll see that gradually replaced by a huge trough of low pressure that will cover the western half of the United States.
That will bring us cooler temperatures by the weekend. Highs around the Valley were in the low-90s on Tuesday. By Saturday, we’ll see highs in the low 70s. There’s also a slight chance for rain late Saturday into Sunday, only about 10 percent right now. But that, of course, could change as we get more detail on the storm headed our way.
Overall, it doesn’t look like a moist storm but forecast charts are showing areas of the Mogollon Rim stretching from near Flagstaff to the White Mountains could get up to a half inch of rain. We’re not expecting anything near that for metro Phoenix.