Synopsis: Lots to talk about today with a welcomed pattern shift in the upcoming weather, which will finally bring our first taste of fall to the desert! In the near term, plan on continuing quiet weather conditions with increasing high clouds tomorrow into Saturday. Daily highs will step back into the lower 90s to end the work week before the 80s arrive over the weekend. Moving ahead, model guidance continues to advertise a strong Pacific disturbance digging south into Desert Southwest Sunday and lingering into Tuesday. This system and an attendant cold front are forecast to bring windy conditions, a dramatic cool down (highs in the 60s and 70s) and possible precipitation to portions of southcentral AZ. We’ll continue to provide additional details in regards to precipitation chances as models come into better agreement over the coming days.
For today plan on mainly sunny skies with perhaps a few stray high clouds and some lingering haze (smoke). Afternoon temperatures will warm into the 92˚F-94˚F range around the Valley with upper 80s to low 90s across the higher terrain locales. Variable winds will remain in the 3-10mph range with no gusts of any consequence. Overnight lows will dip into the mid 60s around the urban corridor under mostly clear skies.
For tomorrow plan on mainly sunny skies early on before increasing afternoon/evening high clouds. Daytime highs will climb into the 90˚F-93˚F range around the Valley. Variable winds will continue to hover in the light category with no noteworthy gusts throughout the day. Heading into Saturday high temperatures will step back into the upper 80s. Plan on overcast skies but dry conditions. Big changes begin on Sunday as the leading edge of our disturbance is forecast to bring additional cooling (highs in the mid 80s), breezy to windy conditions, and possible showers/t-storm activity beginning in the late afternoon/evening. The bulk of the system is then forecast to arrive on Monday along with our dramatic drop in temperatures. As mentioned above, we’ll have more details on this in the coming days.