A weather system approaching the region during the middle of the week will bring increased moisture and rainfall chances into the Southwest. At this time, two rounds of precipitation are likely late Tuesday through Thursday. An area of light showers is possible late Tuesday afternoon through early Wednesday morning, then a more widespread area of rainfall will likely move into the region later in the day Wednesday through Thursday. This will likely result in regional travel impacts around the holiday, particularly for those heading to/from southern California. Uncertainty in rainfall totals remains high, though the highest totals should be focused over southern and western facing slopes of foothills and mountains of northwest and central Arizona.