Synopsis: The upcoming week is shaping up to be rather active in regards to the weather thanks to major changes to the upper-level pattern. Multiple disturbances will move across the Desert Southwest through the period bringing colder temperatures, increased breezes, and eventual precipitation chances to much of the area. Our first system will dig south into the northern Baja by Tuesday before eventually ejecting northeast into AZ during the Wednesday through Friday period. We’ll have a continuation of warmer temperatures in the near term before colder and unsettled/wet conditions as the week progresses.
For Martin Luther King Day plan on clear and sunny skies early on before increasing high clouds this afternoon/evening. Daytime temperatures will warm into the 71˚F-73˚F range around the Valley. Variable winds will generally hover in the 2-7mph range with localized gusts in the 10-15mph ranger this evening. Overnight lows will only fall into the low 50s to upper 40s around the urban corridor under overcast skies.
For tomorrow plan on mostly overcast skies through much of the day with perhaps some sprinkles and a few higher terrain light showers. Afternoon highs will still climb into the 69˚F-72˚F range around the Valley. South/southeast winds will be breezy at times in the 6-12mph range with localized gusts in the 15-20mph range. The first moisture surge associated with this system is forecast to push north into AZ late Tuesday into Wednesday. This period will present our first decent opportunity for rain with guidance favoring the Wednesday morning for showers moving north though portions of the County. Additional periods of shower/rain chances are expected during the Wednesday-Friday period and we’ll have more details as guidance comes into better agreement on the evolution of this first disturbance. We’ll have more tomorrow.