Hello, Arizona! Loving your warm air during this weekend visit. The drive from Albuquerque down to Tucson yesterday meant heading south by nearly three degrees of latitude, plus rolling (up and down and up and eventually) downhill from an elevation of 5,312' to 2,389'—from the relative temperateness of the high desert to sheer low desert heat. It feels like I went from winter to spring to summer within a single week.