Monsoon shows signs of a return to Ariz.

Posted: Updated:
By Andrew Michalscheck By Andrew Michalscheck

PHOENIX -- While the Valley spent Wednesday afternoon baking under a blazing sun, some portions of Eastern Arizona saw an increase in storm activity.

A subtropical ridge of high pressure moving into Arizona is pumping in enough monsoon moisture for afternoon storms to develop across the Mogollon Rim and to the southeast. An increase in high country storms is expected through the end of the week and into the weekend.

By Friday, the Valley could get in on some of the action. Outflow boundaries may kick up dust or even isolated storms. Albeit, the potential for storms is small, but the chance will return each afternoon and evening to the Valley through at least next Monday.

Meanwhile, those living in the southwest Valley were greeted early Wednesday morning by a few nuisance sprinkles. The surprise moisture came from a mesoscale convective system in northern Mexico that pushed enough energy into this portion of the Valley and through Pinal County.

The heat was the bigger story for desert-dwellers. Wednesday afternoon, the high at Sky Harbor reached 109. Thursday morning’s low should dip to 83 in Phoenix, with an afternoon high expected to hit 110. The unseasonably hot temperatures will continue into the weekend. The seasonal average for this time of year is 105.