An increase in moisture Sunday 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 gust, which may also generate 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 temperatures will continue through the weekend as afternoon highs near the triple digits. However, temperatures will also begin a gradual cooling trend starting this weekend and continue through the early to middle portion of next week. In addition, moisture will also be on the increase during the weekend leading to low-end rain chances, mainly over the AZ high terrain, starting on Monday.
Daily high temperatures will remain in record territory into the weekend. 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!
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