Temperatures will continue to increase through this weekend, resulting in widespread major to locally extreme HeatRisk. Lower desert high temperatures will reach 106-118 degrees, while lows will be in the upper 80s to middle 90s. An Extreme Heat Warning is in effect for all of the Arizona lower deserts through Monday and for Friday and Saturday across portions of the eastern Arizona high terrain.
High pressure will expand and strengthen over the region resulting in rapidly warming temperatures through this weekend. Major HeatRisk will become widespread across the lower deserts with localized areas of extreme HeatRisk.
Isolated to scattered showers and thunderstorms will return south-central AZ by this weekend. Storm activity will likely remain mostly confined to the high terrain on Saturday with good chances for outflows and blowing dust across the lower deserts. Better storm chances for the lower deserts will arrive on Sunday.
Increasingly hot and humid conditions will develop over the next few days creating Major to even localized Extreme HeatRisk across the area. Practicing good heat safety will be vital if you need to spend any length of time outdoors. Extreme Heat Warnings go in effect across southeast CA today and then across much of southern and central Arizona starting Thursday. The most dangerous heat is expected to be Friday-Sunday.
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