Maricopa County weather update: Soaring temps to continue but liquid relief may arrive later

Phoenix, Arizona: According to the National Weather Service, extreme heat will continue to prevail through the upcoming week as strong high pressure remains entrenched across the region. High temperatures across the lower deserts will range between 112-120F. Some moisture will start to move over the region by the middle to latter half of the week, aiding in increasing thunderstorm chances across southeast AZ and the Arizona high terrain.

As the center of the high pressure moves near the NV/AZ/UT border by mid-week, the flow pattern will become a bit more favorable to allow for some moisture intrusion into portions of southeastern and eastern AZ. This will lead to afternoon and early evening isolated storm chances starting as early as Tuesday across portions of southeastern and the higher terrain areas of eastern AZ. Unfortunately, given the isolated nature of the storms, any associated outflow boundaries or cloud debris will likely not be enough to have a significant effect on the overall temperatures.

Heading into the weekend, the high pressure is expected to migrate towards the Four Corners Region. This will lead to increased storm chances, at least for the Arizona lower deserts. With the increased moisture, temperatures will trend down below the excessive heat threshold.