Debris Flow — San Sebastian, Puerto Rico

2025-08-23 · near San Sebastian, San Sebastian, Puerto Rico

Event narrative

Landslide affected road PR-111 near Cascada Salto Collazo (waterfall) in San Sebastian. The road was partially closed.

Wider weather episode

Abundant tropical moisture from a passing tropical wave combines and favorable upper-level conditions from an approaching trough helped promote showers and t-storms during the afternoon of August 23rd. Southeasterly winds steered activity toward northwestern Puerto Rico and from El Yunque to the metro area (El Yunque Streamer).

View location on OpenStreetMap → (18.3331, -66.9499)

Source: NOAA Storm Events Database, event_id 1292826. Narrative written by the NWS forecast office that issued the report.