NWS Forecast Office Phoenix, AZ

An increase in moisture from the south and southeast late this week into the weekend will lead to slight (15-20%) chances for showers and storms across the AZ lower deserts. Chances will mostly be focused on Friday and Saturday morning for the lower deserts, then better chances become relegated to the AZ high terrain (Mogollon Rim, portions of Southeast AZ) by Saturday afternoon. Lingering moisture on Sunday could lead to additional shower/storm activity once again over the AZ high terrain. The main concerns with lower desert showers and storms will be the potential for lightning and locally gusty winds. The rainfall potential is expected to be limited with this activity, though a quick 0.10" is conceivable with some of the stronger convective showers.

Afternoon high temperatures are likely to reach a 5 to 10 degree above normal range by this weekend, which could result in some areas of Major HeatRisk across the lower deserts. Never underestimate the heat, and plan your weekend accordingly! Remember to drink plenty of water and take breaks in air conditioning.