NWS Forecast Office Phoenix, AZ

An increase in moisture today will support isolated shower and thunderstorm development in the afternoon through the evening, primarily across southern AZ with activity forecast to stay south of Phoenix. Any shower or storm will be capable of producing locally strong wind gusts, which may also generate areas of blowing dust. Gusty outflow boundaries will be capable of travelling far from the parent activity, including through Phoenix. Rainfall will be spotty and very limited due to dry sub-cloud air.

Record high or near record high temperatures will continue through Monday as afternoon highs will be in the upper 90s. Temperatures will also begin a gradual cooling trend through the first half of the week with more noticeable cooling during the middle of the week. Additionally, Moisture will also be on the increase during the first part of the week leading to low-end rain chances, mainly across southern AZ. Another weather system arrives during the middle of the workweek, however, rain chances are expected to stay in the higher terrain to the north and east of Phoenix.

Daily high temperatures will remain near record territory through Monday. Even when an Extreme Heat Warning is not in effect, it is important to not let your guard down! This early-season heat (high-end Minor to low-end Moderate HeatRisk) still pose a danger to folks who are sensitive to the heat and if you do not take the proper precautions, especially during strenuous or long duration outdoor activities!