Rio Yauco above Diversion Monserrate, PR
River level and flood forecast · Yauco County
The river is 6.8 ft below flood stage (8.5 ft).
Flow: 8 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Rio Yauco above Diversion Monserrate to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 16 ft |
| Moderate flood stage | 11 ft |
| Flood stage | 8.5 ft |
| Action stage | 6 ft |
| Record crest (May 1, 2025) | 12.03 ft |
What floods at each level
From the National Weather Service, highest first.
- 13 ftThe flood waters could reach Ernesto Ramos Antonini Specialized School of Fine Arts. Flood water will reach Sector Chichamba (18.0386, -66.84364); the roads will become impassable with water entering the low level structures of about 11 houses close to the river banks. -erg 05/2025
- 12 ftPR-335 in Barrio Barinas will be extensively flooded. The road and the access to several houses will be impassable.
- 11.5 ftFlooding will begin to impact Urb. Luchetti. Calle Marginal and Calle 1 will become impassable, with about a foot of water accumulated. The water will not reach the houses. At the other side of the river, flooding will impact the lowest portion of Calle del Rio. The water will flood PR-127 from Urb. Luchetti toward Las Letras de Yauco. Flood waters will also reach PR-335, intersection with PR-3335, next to Guayanilla.
- 9 ftPR-127 in Yauco becomes impassable. - erg 05/2025
- 8.5 ftFlooding along PR-335, near the confluence of Quebrada Berrenchin and near the Planta de Tratamiento de Yauco. The road will become impassable.
Highest crests on record
- 12.03 ft — May 1, 2025
- 9.83 ft — August 31, 1979
- 9.47 ft — November 13, 2024
- 9.03 ft — March 24, 2026
- 8.97 ft — September 12, 1982
Recent crests: 9.03 ft (March 24, 2026) · 8.56 ft (August 30, 2025) · 12.03 ft (May 1, 2025) · 9.47 ft (November 13, 2024) · 8.29 ft (August 14, 2024)
Up and down the river, and nearby
- Rio Guayanilla near Guayanilla, PR
- Rio Loco near Yauco, PR
- Rio Loco at Las Latas, PR
- Canal de Riego de Lajas Sabana Grande, PR
- Canal de Riego de Lajas Abv Majinas Filtration Plant, PR
- Canal de Riego de Lajas Blw Majinas Filtration Plant, PR
- Rio Portugues near Tibes, PR
- Canal de Riego de Lajas Abv Lajas Filtration Plant, PR
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (LLYP4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.