The best chance of showers looks to be along and south of I-10 today. Better rain chances however will move in over the next couple of days.
On Friday it looks like a cold front will start moving in to the northern areas by the afternoon. This will trigger showers and storms that will be moving through the area into Saturday. It looks like the front pushes south by Saturday evening.
At that point, rain chances will come to an end and we should see a rare shot of lower humidity for the end of May. Right now it looks like very pleasant conditions on Sunday and Memorial Day.