Synopsis: 2012's hottest weather likely Monday or Tuesday. A powerful ridge of high pressure will send highs to 102-105 in Tucson. The ridge will break a bit toward the end of the week with temperatures closer to average in the middle 90s.

Saturday Night:  Clear with lows near normal in the lower 60s.  Mount Lemmon: 48 degrees.

Sunday: Mostly sunny with highs in the upper 90s.  Mount Lemmon: 71 degrees.

Sunday night: Clear and warmer Lows dipping to the mid to upper 60s.  Mount Lemmon: 51 degrees.

-Meteorologist Aaron Brackett