Flash Flood — San Lorenzo, Puerto Rico

2009-12-25 · near San Lorenzo, San Lorenzo, Puerto Rico

Event narrative

A house was reported flooded at Vistas de San Lorenzo sector, Lirio Rd in the municipality of San Lorenzo.

Wider weather episode

December 24th and December 25th stood out because they were the wettest days of the month which in turn evolved into the most hydrologically active period across the region. By the evening of December 24th, a Flood Watch was issued for most of Puerto Rico and the U.S. Virgin Islands as heavy rain began to envelope the area due to shower and thunderstorm development from the interaction of local effects and a low pressure center northeast of Hispaniola that was slowly drifting east northeast across the forecast area. Maximum rainfall reports from this event ranged from 5 to 9 inches. The two highest reports in Puerto Rico were 7.13 inches in San Lorenzo and 9.0 inches in Aibonito. The runoff from this rainfall resulted in flash flooding in Aibonito, Fajardo, Las Piedras and Naguabo. Rapid and significant rises were also noted on the Rio Fajardo, Rio Naguabo, Rio Gurabo, Rio de La Plata and the Rio Grande de Loiza and many of its tributaries.

View location on OpenStreetMap → (18.1932, -65.9666)

Source: NOAA Storm Events Database, event_id 210094. Narrative written by the NWS forecast office that issued the report.