Phoenix weather: Weekend monsoon storms possible

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By Tami Hoey By Tami Hoey

PHOENIX -- Over the next couple of days, we'll see very little change in the atmosphere. As a result, we’ll continue to see above-average temperatures around Arizona for this time of year. That translates into highs in the 106-110 range around metro Phoenix with overnight lows in the upper-70s and low-80s.

However, near the end of the week, a trough of low pressure approaches from the Pacific Northwest. Ahead of the trough, we’ll see a more southerly component in the upper atmosphere which will draw some moisture into the state. By Thursday and Friday, we’ll see isolated storms in SE Arizona and the mountains of the state. By the weekend, the chance for storms returns to the Valley. Some of the weather models are putting the chance for rain Saturday and Sunday as high as 60 percent, but a probability of 20 to 30 percent is more in line with probable reality.

It also looks like we may stay hooked up to monsoon moisture for several days. Prognostic charts for Monday and Tuesday are also showing an abundance of moisture across Arizona. And that could mean a bunch of thunderstorms.