Synopsis: We’re about to begin another long string of 110°F+ days that should easily take us into next week. Before we dive into that, let’s instead focus on the near term and a slow upper level pattern shift underway which has the Monsoon ridge building west into the NM/AZ border. This will allow for a brief intrusion of moisture north into AZ lending to a modest uptick in clouds/showers and possibly a few t-storms across southcentral AZ later today and again tomorrow. Back to the heat, as excessive heat warnings are in place through the remainder of the week as the heat wave kicks into high gear. Daily highs are expected to reach the 110°F F-113°F range through Thursday before seeing a jump into the 114°F-115°F range Friday through Sunday.
For today plan on mostly sunny skies early on before increasing clouds into the evening hours. Afternoon temperatures will warm back into the 110°F-112°F range around the Valley. South/southwest winds will hover in the 5-10mph range with localized greater gusts into this evening. Storm activity later today will generally remain limited to eastern and southern AZ. We could see a storm or two closer to the greater Phoenix Valley with the help of outflow boundaries. Otherwise plan on warm overnight lows only dipping into the low 90s around the urban corridor.
Plan on lingering debris clouds into tomorrow morning before sunnier skies into the early afternoon. Daytime highs will climb back into the 111°F-113°F range around the Valley. South/southwest winds will again remain in the 5-10mph range with localized greater gusts possible into the evening hours. Storm activity will generally remain across the higher terrain areas north and east of the Valley and across southern AZ, but we could also see a few evening showers/storms pop up in and around the Valley, if we get the help of outflow boundaries. Moving ahead, plan on drier and hotter conditions Friday and into the upcoming weekend. We’ll have more on this in tomorrow’s extended Outlook.