FORECAST: Storm system set to move into Arizona

A ridge of high pressure over the Desert Southwest is going to keep things hot Sunday, with highs right around 97 degrees. At the same time, a storm moving into the West Coast will tighten the pressure gradient and bring in some breezy conditions by the afternoon.

MOST ACCURATE FORECAST: Temperatures climb and winds pick up Sunday

By: Justin Hobbs

PHOENIX — After a hot end to the weekend with a high near 98 degrees, big changes are on the way as a storm system moves in from the West Coast.

Temperatures will drop nearly 20 degrees by Tuesday as that system pushes through the region.

For Monday, expect mostly cloudy skies, with rain chances increasing late in the evening into the overnight hours for parts of southeastern Arizona.

In the Valley, a brief shower can’t be ruled out early Tuesday morning, but chances remain low at around 10 percent.

Farther north, scattered showers and storms will develop across the Rim and northeastern Arizona through Tuesday afternoon.

As the system moves through, winds will stay breezy at times, with Valley gusts still around 20 miles per hour.

That cooler air will knock highs back to around 80 degrees on Tuesday, with morning lows dipping into the upper 50s to lower 60s.

But that cool-down won’t last long. A strong ridge of high pressure builds in behind the storm, sending temperatures right back into the triple digits by late week and into next weekend.