A more active weather period is expected Saturday through Monday as increasing moisture and instability, combined with an upper-level disturbance, will result in a greater coverage of showers and storms. The greatest coverage of activity is currently forecast across south-central AZ, with Sunday and Monday appearing to be the most active periods at this time. All thunderstorm hazards are on the table including heavy rainfall leading to localized flash flooding, strong to severe wind gusts, areas of blowing dust, frequent lightning, and even some small hail.
Strong high pressure over the Southwest will lead to abnormally hot temperatures continuing into the weekend with temperatures 5-7°F above normal and near record territory at times. This will result in Major to Extreme HeatRisk across much of the lower deserts. The Extreme Heat Warning remains in effect through Saturday for much of the area.
Heat can escalate quickly. Make sure to drink plenty of water and electrolytes and wear loose-fitting light-colored clothes. Stay indoors in air conditioning as much as possible, especially during the afternoons. If you have to be outside take frequent breaks in the shade. Never leave people or pets alone in a closed car. Don't underestimate the heat, it's the deadliest weather hazard.
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