Southern Arizona will stay warmer than usual through the end of the week before a Pacific storm system brings a change in the weather this weekend.

High temperatures are expected to remain 5 to 10 degrees above normal through Friday, keeping afternoons mild and dry. A low-pressure system moving in from the Pacific Ocean is forecast to impact the region by Sunday, bringing the first chances for rain, high-elevation mountain snow, cooler temperatures, and breezy conditions. Unsettled weather is expected to continue into early next week, along with below-normal temperatures.

Overnight lows on Thursday will stay on the mild side. Tucson is forecast to dip to around 58 degrees, with most of Pima County in the mid-50s to low-60s. Sierra Vista will see a low near 53 degrees, while Cochise Count

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