FirstAlerts

Flood Watch in Effect Through Late Tonight for Tucson Metro Area and Southeast Arizona

The National Weather Service warns of possible flash flooding from excessive rainfall across the Tucson Metro Area and other parts of Southeast Arizona through late tonight.

2 reports on this incident · first at Sep 3, 2026, 1:42 p.m. ET

By AI ReporterWritten Sep 3, 2026, 1:53 p.m. ET
The has issued a for portions of Southeast Arizona, including the Tucson Metro Area, in effect from 1:00 PM MST today, September 3, 2026, through :00 AM MST tomorrow, September 4, 2026. The covers the Catalina and Rincon Mountains, Dragoon and Mule and Huachuca and Santa Rita Mountains, Tucson Metro Area, Upper San Pedro River Valley, and Upper Santa Cruz River Valley/Altar Valley. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas, and low-water crossings may be flooded. The Weather Service advises monitoring later forecasts and being prepared to take action should Flash Flood Warnings be issued.

Earlier reports

  1. Sep 3, 2026, 1:42 p.m. ETFirst report

    Flood Watch Issued for Tucson Metro Area and Southeast Arizona Valleys Through Late Tonight

    The National Weather Service in Tucson has issued a Flood Watch for portions of Southeast Arizona, including the Tucson Metro Area, Upper Santa Cruz River Valley/Altar Valley, and Upper San Pedro River Valley, effective from 1 p.m. Thursday, September 3, 2026, through 5 a.m. Friday, September 4, 2026. The watch was issued at 10:37 a.m. Thursday and covers the Catalina and Rincon Mountains, Dragoon and Mule and Huachuca and Santa Rita Mountains, Tucson Metro Area, Upper San Pedro River Valley, and Upper Santa Cruz River Valley/Altar Valley.

    According to the National Weather Service, flash flooding caused by excessive rainfall is possible. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas, and low-water crossings may be flooded.

    Residents are advised to monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

Was this report accurate and useful?

Sources

Revision history

  1. Version 13 Sept 2026, 17:53current

    First published.

  2. Version 13 Sept 2026, 17:42current

    First published.

How we work

This site models an investigative reporter rather than a wire desk. The aim is the most complete, accurate and timely account we can assemble — all three, not a trade between them. Reports go out within minutes of the coverage they are built from, carrying context a newsroom would otherwise need a day and a records request to gather: what has happened at this place before, what the operator’s record is, which aircraft it actually was.

Reports are built from primary sources — accident and court records, official registries, weather observations, agency statements — and from reputable news organisations, each named where their reporting is used. Facts are extracted before anything is written, and every one must be supported by a quotation found in the source itself; the model that writes the report is given only those verified facts and never sees the article, so it cannot introduce a detail no source stated.

Where sources disagree we publish the disagreement, attributed, rather than picking a figure. Where a fact comes from a record rather than a reporter, we say so, and the language matches: an instrument reading is never described as something anyone confirmed. Some things are deliberately withheld — a suspect is not named until an agency names them on the record, victims until families or officials release them — and corrections appear as visible revisions, never as silent edits.

None of that makes a report true. A quotation check proves a source said something, not that it was right, and an automated system can be confidently wrong in ways the checks do not catch. If something here is wrong, the feedback above is how it gets found. The full methodology, including what we refuse to publish.