FORECAST: Isolated and scattered storms through Saturday

Posted: Updated:
Phoenix seven-day forecast (Source: 3TV/ CBS 5) Phoenix seven-day forecast (Source: 3TV/ CBS 5)
PHOENIX (3TV/CBS 5) -

Isolated to scattered storms are in the forecast from the mountains to the Valley this evening through at least Saturday night.

The main threats with these storms are heavy rains producing flash flooding, strong winds, lightning and blowing dust.

[RELATED CATEGORY: Currents]

The Valley has a 40 percent chance of storms through Friday night. Storm chances drop to 30 percent Saturday.

An area of low pressure off the coast of California  and high pressure to the east are allowing deep monsoon moisture to stream in from the south. Moderate instability is helping fuel thunderstorm development. Storms are tracking from south to north. Outflows from storms south of Metro Phoenix may produce dust storms and generate new thunderstorms in the Valley.

[RELATED: Weather Blog]

A Flash Flood Watch is in effect for Metro Phoenix through 12 a.m. Saturday and for the mountains north of the Valley in Coconino and Yavapai counties until 5 p.m. Saturday.

[RELATED: Rain Totals]

A Blowing Dust Advisory is in effect for the southern deserts, including Metro Phoenix until 8 p.m. Friday. This means thunderstorms are capable of winds that would kick up dust and reduce visibility.

With winds flowing from south to north, most of that wildfire smoke should be pushed out of Arizona.

[RELATED: Seven-day forecast]

Thanks to increasing clouds, storms and higher humidity, cooler than average temperatures are expected this weekend. In Metro Phoenix, look for a high of 97 Saturday. By Sunday, highs will be closer to 104 under mostly sunny skies. Sunshine and hotter temperatures return next week as a drying trend begins for a lot of Arizona.


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