PHOENIX -- Triple-digit heat has arrived in the Valley of the Sun.
At 2:19 p.m. Saturday, the National Weather Service reported Phoenix Sky Harbor reached 100 degrees. By 2:23 p.m. the temperature rose to 102. This was the official high for May 3 and the first 100-degree day of the year in Phoenix.
A ridge of high pressure building in from the west kept skies clear and winds light across the entire state. That ridge is shifting east, and by doing so, temperatures will drop over the next several days.
Many Valley communities may see one more 100-degree day for Sunday before a storm system from the Pacific Northwest ushers in cooler air and breezy winds across the entire state. The high country may see isolated thunderstorms by midweek.
Red Flag Warnings and Fire Weather Watches have already been issued across northern Arizona both Sunday and Monday ahead of this system. Wind gusts are expected to peak around 40 mph, with relative humidity below 15 percent. This combo will create a high fire danger.
In Phoenix, look for a morning low Sunday of 68 degrees with an afternoon high of 100. Highs Monday will dip to the upper 90s as winds kick up between 15 and 20 mph. Tuesday will be another breezy day with highs in the upper 80s.