Warmer Wednesday, rain possibly this weekend

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PHOENIX -- After several fairly cool days, Wednesday will bring warmer weather that lasts for the rest of the workweek. 

Morning lows were a tad warmer, but still chilly Wednesday morning, with most Valley locations starting off in the 40s. 

A ridge of high pressure will bring clear skies and afternoon highs in the mid 70s -- a full 10 degrees warmer than Tuesday's highs.

As that ridge shifts tomorrow, look for breezy conditions to develop, with easterly winds between 10 and 15 mph Thursday.  Gusts of up to 30 mpg are possible.  Some mid and high-level clouds will also begin to spread into Arizona ahead of a weekend storm, bringing partly sunny skies for Thursday and Friday. 

A low-pressure system is forecast to move across the state this weekend, although the exact timing is still uncertain. 

Temperatures will drop off both days, with a 40 percent chance of rain Saturday and Saturday night in the Valley, and a 30 percent chance Sunday. 

Snow looks likely in the high country, especially Saturday night into Sunday morning.