PHOENIX -- After a day of record warmth, our ridge of high pressure begins to break down today. Temperatures will be slightly cooler than Tuesday's record 82 degree high, but we'll still top out well above average for this time of year near 76 degrees. The average high temperature for this time of year is 65 degrees.
High clouds are increasing today from the west, but no rain is expected today in Arizona. Mostly cloudy skies and mild temperatures are expected today and tomorrow, with Valley highs dropping to the upper 60s tomorrow.
Tomorrow night, a cold front is forecast to move through our state, bringing a chance of rain and snow starting late tomorrow and increasing Friday. For the Valley, rain chances begin after about midnight Thursday and increase to about a 50 percent chance of rain Friday. There is a slight chance for rain Saturday, too, but the bulk of the rain and snow should be gone by then.
Snow in the high country will begin overnight Thursday and should move out by Saturday afternoon, with two to four inches total expected in spots like Flagstaff.
Friday's storm will dramatically drop temperatures. After days of highs in the 70s and low 80s, we'll struggle to reach the low 60s Friday and may even stay in the upper 50s on Saturday.
A warm-up is forecast to begin on Sunday, with temperatures peaking in the upper 60s by Christmas.