Highlights
- NWS Phoenix issued a Flood Advisory for Maricopa County effective 9:25 p.m. Tuesday, expiring at 12:30 a.m. Wednesday.
- Scottsdale, Fountain Hills, and McDowell Mountain Park are among the named locations expected to experience flooding.
- Between 0.5 and 1.5 inches of rain have already fallen; an additional 0.25 to 0.75 inches is forecast.
- NWS urges drivers not to cross flooded roads, noting most flood deaths occur in vehicles.
FLOOD ADVISORY: The National Weather Service in Phoenix issued a Flood Advisory for Maricopa County at 9:25 p.m. Tuesday, valid until 12:30 a.m. Wednesday, citing heavy rainfall from overnight thunderstorms.
Scottsdale, Fountain Hills, and McDowell Mountain Park are among the locations NWS identified as likely to see flooding. Doppler radar and automated rain gauges confirmed between 0.5 and 1.5 inches of rain had already fallen across the advisory area as of the alert's issuance. An additional 0.25 to 0.75 inches is expected, which NWS says will produce minor flooding in low-lying and poor-drainage areas.
The advisory carries a severity rating of minor. NWS warns that most flood deaths occur in vehicles and urges drivers to turn around rather than attempt to cross flooded roads. Nighttime conditions increase the risk, the agency noted, as darkness makes it harder to gauge road flooding.
The advisory expires at 12:30 a.m. MST Wednesday, September 17.
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- api.weather.gov retrieved 17/09/2026 04:28
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 17/09/2026 04:28. Every claim traces to a source.
