PHOENIX -- If you are tired of the 110-degree temperatures that scorched the Valley for the past couple of days, you’re in luck. After Friday afternoon, cooler days are headed our way.
An area of low pressure across the Pacific Northwest is expected to push a ridge of high pressure that’s been anchored over Arizona to the east. This ridge was a big player in our sweltering early September heat wave.
Friday afternoon, look for a high in Phoenix of 108 with a 10 percent chance of storms or blowing dust moving in from the south.
As the ridge of high pressure shifts east, monsoon moisture will increase from the southeast.
Beginning Saturday afternoon, expect Valley storm chances to increase to around 20 percent and temperatures to drop to around 103 in Phoenix.
On Sunday, the remnants of what is now tropical storm Lorena, churning near Baja California, will dissipate and send a moisture plume across western Arizona. Between this, and our monsoon moisture, storm chances will once again increase across the state.
In the Valley, we’ll keep a 40 to 30 percent chance of storms in the forecast Sunday through the first half of next week. Temperatures will also continue a downward spiral.
Look for a high in Phoenix of 99 degrees Sunday, with a high of only 93 degrees Monday. Overnight lows will drop into the mid and upper 70s.