First published Oct 20, 2026, 7:23:15 AM UTC · Last updated Oct 20, 2026, 7:32:16 AM UTC

Floods

Flood Watch — NWS Phoenix AZ

Original source title

Flood Watch issued October 20 at 12:04AM MST until October 22 at 11:00PM MST by NWS Phoenix AZ

Reported by U.S. National Weather Service Alerts NWS, U.S. National Weather Service Alerts NWS

The National Weather Service issued a flood watch for multiple areas of south-central Arizona, including Phoenix-area communities, from Wednesday evening through Thursday afternoon. Flash flooding from excessive rainfall is possible, and the alert advises monitoring later forecasts.

At a glance

Affected location: South-central Arizona

Illustrative image: Hoover Dam (visitor center) on the side of Nevada , Nevada/ Arizona , USA The Hoover Dam is a monumental dam on the Colorado River between the states of Nevada and Arizona. It was built between 1931 and 1936 during the Great Depression and was one of the largest construction projects of its time. Thousands of workers were involved; the construction was considered a technical masterpiece. The dam is named after President Herbert Hoover, who promoted the project politically. The enormous arch dam — Dietmar Rabich/Wikimedia Commons, CC BY-SA 4.0

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Why it matters

The watch covers multiple communities and warns of possible flash flooding from heavy rainfall.

Update history

Oct 20, 2026, 7:04 AM UTC
The National Weather Service issued a flood watch for multiple areas of south-central Arizona, including Phoenix-area communities, from Wednesday evening through Thursday afternoon. Flash flooding from excessive rainfall is possible, and the alert advises monitoring later forecasts.
U.S. National Weather Service Alerts NWS

Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence: 7/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 3/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 2/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 3/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Urgency: 4/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

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