Highlights
- Arizona's Family meteorologist April Warnecke declared First Alert Weather Days for both Tuesday and Wednesday.
- Storm chances reach 70% late Tuesday night and Wednesday morning, with Valley rainfall projected at a half inch to an inch.
- Heavy rain and flooding are possible overnight; conditions taper Thursday and clear by Friday.
- Temperatures drop to the mid-to-upper 90s Wednesday and Thursday before returning to triple digits over a dry weekend.
The Phoenix area is under a First Alert Weather Day Tuesday, with a second alert in effect for Wednesday, as Arizona's Family meteorologist April Warnecke warns of an active stretch of storms across Arizona.
Expect partly sunny skies and a high of 100 degrees in the Valley Tuesday, with a few morning showers and isolated thunderstorms possible. Storm chances improve by late afternoon and evening, then surge overnight: the National Weather Service Phoenix office and Warnecke's forecast both put storm probability near 70% late Tuesday night and into Wednesday morning, when showers and thunderstorms are expected to be widespread.
Valley rainfall totals are likely to land between a half inch and an inch, with isolated pockets running higher. Heavy rain and flooding are possible during the overnight window. First Alert Weather Days were also declared ahead of this system, with forecasters flagging strong winds, heavy rain, and potential flash floods for Tuesday and Wednesday.
Rain chances continue Wednesday before tapering Thursday. The Valley dries out completely by Friday, with temperatures climbing back to triple digits over a dry weekend.
When is the highest flood risk?
The greatest threat for heavy rain and flooding is overnight Tuesday into Wednesday morning, when storm chances reach 70% and thunderstorms are expected to be widespread across the Valley. Conditions ease Wednesday afternoon and taper further Thursday.
Residents should monitor conditions through Wednesday morning.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- AZ Family (3TV/CBS5) retrieved 15/09/2026 13:23
- weather.gov retrieved 15/09/2026 13:23
- AZ Family (3TV/CBS5) retrieved 15/09/2026 13:23
Authored by The Scottsdale Signal. Drafted by AI from primary-source material under our beat-specific editorial guides; reviewed by humans before publish under our five-gate process. Sources retrieved at 15/09/2026 13:23. Every claim traces to a source.
