The weekend kicks off with cooler than average temperatures

Posted: Updated:
PHOENIX (3TV/CBS 5) -

Cooler than average temps, high humidity and a chance of storms are in the forecast for the Valley to kick off the weekend, with scattered storms expected in the mountains of northern Arizona.

Southerly flow continues to pump gulf moisture into the state, but instability is expected to be pretty modest across Metro Phoenix, so storm chances are at 20 to 30 percent this morning through this afternoon under partly to mostly cloudy skies.

Ingredients for storms are more abundant across the mountains of northern and central Arizona, as well as southwest Arizona. The main threats will be heavy rain, strong winds, lightning and hail.

A Flash Flood Watch continues for western Arizona, as well as Coconino and Yavapai counties until 5 p.m. this evening.

By Sunday, high pressure near the Four Corners region and low pressure off the coast of California will start to import a drier, more stable air mass into the state. This will clear out skies in the Valley and heat temperatures through the middle of next week.

Despite the drier air, storms are still in the forecast for the mountains each day, but low grade monsoon conditions are expected Monday through Wednesday.

In Phoenix, look for a high of 95 Saturday, with Sunday at 103 under mostly sunny skies. Highs will rise to around 107 Monday and remain near 105 through Wednesday.

As of the 5 a.m. update of Hurricane Irma from the National Hurricane Center, the storm is a category 3 storm with winds of 130 miles per hour. It's moving near northern Cuba this afternoon, expected to pass the Florida Keys Sunday morning and the southwest Florida coast by Sunday afternoon as either a category 4 or 3 hurricane.

The Florida Keys could see 10 to 20 inches of rain, with the Florida panhandle and southern Georgia seeing 8 to 15 inches through Tuesday night. Storm surge could be as high as 10 feet for parts of Florida.

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Copyright 2017 KPHO/KTVK (KPHO Broadcasting Corporation). All rights reserved.


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