A Pacific Northwest storm system is moving into Arizona, bringing a Flash Flood Watch to metro Phoenix and threatening the state with two distinct waves of heavy precipitation through the weekend, AZ Family reported. Meteorologists expect one to two inches of rain across the Valley by Sunday, raising localized flood risks without matching the severe tornado activity recorded the previous week.
First Storm Wave Brings Thursday Night and Friday Showers
The initial wave of moisture arrives Friday morning, bringing steady showers and potential thunderstorms with locally heavy rainfall that will persist through much of the day. While forecasters note that a severe storm cannot be completely ruled out, the system is expected to push east by Friday night. This movement creates a brief lull in the weather, leaving Saturday afternoon relatively quiet across most of the state before the next weather maker arrives.
Halloween Night and Sunday Rain Threat
The second storm system arrives as early as Saturday night, complicating outdoor plans for trick-or-treaters across the Valley. Precipitation is expected to intensify overnight and persist through Sunday, creating a widespread weather hazard. AZ Family indicates that Sunday will likely deliver heavier rainfall totals than Friday, accompanied by widespread cloud cover, scattered showers, and embedded thunderstorms statewide.
Weekend Temperatures Drop Below Average
Daytime temperatures will hover in the 70s across most of Arizona for the weekend, but the incoming storm front will drive cooler air into the region by Sunday. Afternoon temperatures may struggle to reach the 60s in some communities as the second wave establishes itself over the state. Residents living in flood-prone areas should monitor local alerts as weather conditions evolve through the weekend.
Frequently Asked Questions About the Arizona Storm
Which areas are under a Flash Flood Watch?
A Flash Flood Watch is out for metro Phoenix and much of the state as a storm system brings a chance for flash flooding across Arizona.
How much rain is expected in the Valley?
Forecasters expect between one and two inches of total rainfall across the Valley from the combined storm systems through Sunday evening.
Will trick-or-treating be affected on Saturday?
The second wave of moisture is projected to begin arriving on Halloween night, bringing scattered showers that may impact evening outdoor activities.
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