San Carlos River flooding: NWS reports GO evacuations near Peridot

That instruction concerns the affected river corridor, not every resident of Peridot or all of Graham County. The warning covers west-central Graham County, Arizona, and names Peridot and San Carlos Reservoir among places expected to experience flooding. Its broad warning geography should not be mistaken for a property-by-property evacuation boundary.⁠1

The warning’s stated expiration is 4:15 p.m. MST on November 2—the following afternoon, almost a full day after issuance. That is a weather-warning deadline, not a promised return-home time. No verified evacuation all-clear has been established.

The November 1 alert is the basis for this account of the flooding, river reading and evacuation status. A later gauge observation, a separate current tribal or county evacuation directive, and any subsequent renewal or cancellation of this warning have not been independently confirmed. Those limits matter: this is a dated emergency report, not confirmation of conditions at every affected address right now.

The 16.5-foot figure is river stage: the water level measured against the gauge’s reference point. It does not mean floodwater is 16.5 feet deep across a road, in a yard or inside a home. Those depths require separate measurements. Nor does one observation show whether the river is rising, has reached its crest or is receding.

The official U.S. Geological Survey monitoring site is numbered 09468500, San Carlos River near Peridot. The available official gauge information identifies the station, but does not provide a November 1 observation series that independently confirms the alert’s reading or establishes what happened afterward.⁠20⁠21

No official numerical threshold for major flooding was independently established for this report. It would therefore be misleading to turn the 16.5-foot observation into a claim that the river stood a particular number of feet above that threshold. The supported description is the one in the weather alert: major flooding was occurring, rather than merely being forecast.⁠1

Likewise, naming Peridot and San Carlos Reservoir as threatened locations does not establish that every property there flooded. The available account provides no confirmed count of damaged structures or casualties. Missing totals are not evidence that no one was harmed or that no buildings took on water.

For people covered by the reported GO instructions, this is the leave-now stage, not a notice to begin preparing for a possible evacuation. The weather alert reports that status; it should not be presented as a newly verified evacuation order issued by tribal or county authorities. Precise boundaries, shelter addresses and designated evacuation routes have not been established in this account.⁠1

The warning also tells drivers not to travel through flooded roads. A familiar route is not a safe route simply because it normally provides access to the community. Follow local emergency instructions when leaving the affected corridor; no verified road-by-road closure list is available here.⁠1

For residents waiting to return, the crucial missing information is an explicit emergency-management update alongside current river conditions. A warning can reach its scheduled end without that fact alone establishing that roads are passable, properties are safe or an evacuation instruction has been lifted.

The next dated checkpoint is 4:15 p.m. MST on November 2. Any continuation, replacement or cancellation of the weather warning must be distinguished from the separate decision about evacuations. Until an authorized update establishes otherwise, the clock is not an all-clear.