Synopsis: As mentioned last week, the blocking pattern that has kept much of the Desert Southwest unseasonably hot and dry will finally break down allowing for cooler and unsettled weather conditions later this week. At least two disturbances will move across the region this week, with the first arriving tomorrow bringing increased cloud cover (perhaps some sprinkles) along with modest drop in temperatures. A second more dynamic system is slated to arrive Thursday/Fri bringing possible desert rain/ mountain snow followed by significant cooling into the weekend. We’ll have plenty of details as the week unfolds.
For today plan on mainly clear skies early on before increasing high clouds into this afternoon/evening. Daytime temperatures will warm into the 76˚F-78˚F range around the Valley. Variable winds will hover in the 5-10mph range with no gusts of any consequence throughout the day. Overnight lows will dip into the mid to low 50s around the urban corridor under cloudy skies.
For tomorrow plan on cloudy/overcast skies mixed with some pockets of sun. Afternoon highs will settle in the 74˚F-76˚F range around the Valley. Variable winds will remain in the light category with no noteworthy gusts to contend with. We’re not expecting any measurable rain with this first system, but some lucky areas might get some sprinkles before the disturbance exits the area late Tuesday. Heading into Wednesday, plan on a return to sunnier conditions. Highs will step back into the low 70s before our next system arrives on Thursday into Friday bringing unsettled conditions and much colder temperatures.