 And then we hit 121 in 1995. The excessive heat warning issued June 30th remains in effect through Friday. A chance of storms for the weekend and storm chances start developing Tuesday and Wednesday in southern Arizona, says meteorologist Chris Rasmussen. The heat does help, and it usually kind of signals the deeper moisture to come in. Flagstaff will be in the 90s this week, says meteorologist Carter Humphreys. It is warm for Flagstaff, but we don't have any excessive heat products up here. Connie Weber, Arizona Newsradio.