National Weather Service United States Department of Commerce

Afternoon thunderstorms over the typically favored Northern and Eastern AZ high terrain as well as portions of Pima County are likely to send at least one outflow boundary towards the South-Central AZ lower elevations, which would reach the Greater Phoenix Area by late afternoon or evening. This outflow could carry dense blowing dust with it, especially if it comes from the south or southeast. A collision of outflow boundaries or one particularly strong outflow boundary may be sufficient to spark additional thunderstorms. Strong, gusty winds, locally heavy rainfall, and frequent lightning will be the primary concerns. Due to this
The Storm Prediction Center (SPC) has placed much of south central Arizona under a marginal risk for severe weather tonight and Monday evening. The highest risk for our region will be thunderstorms and wind gusts. Outflows boundaries from thunderstorms in Southern Arizona can produce strong damaging winds and create areas of dense blowing dust.
Lower deserts highs will top out at 110 degrees today, resulting in areas of Major HeatRisk. Temperatures gradually cool through the upcoming week. Deeper moisture will lead to better chances for more widespread shower and thunderstorm activity through the middle of the week with Monday and Wednesday into Thursday looking like the most active periods at this time.
Extreme Heat Warnings remain in effect through this evening across lower deserts locations as localized major HeatRisk continues. Many lower desert locations will near or exceed 110 degrees. The elevated humidity levels will make it feel even hotter.
Dangerously hot temperatures are in the forecast through the weekend. Make sure to take the proper precautions to protect yourself from the heat, it is the deadliest weather-related phenomenon.

 

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