Nibi Metrics
Real-time water levels, forecasts, and alerts for lakes and rivers across Canada and the US. Built on official government data.
Nibi Metrics turns raw gauge readings from official hydrometric networks into something a person standing on a dock can actually use: is the water high or low for today, which way is it moving, and how unusual is this? This page explains where every number on the platform comes from and what we do to it along the way.
Water Stories
For five years, spring 2019 was the mark every Lake Muskoka decision answered to. In April 2026 the lake went two centimeters higher - and the official books have not caught up yet.
Inside the freshet cycle that puts Manitoba shorelines at risk each year - and why 2026 broke the script.
The science of snow water equivalent and why it drives the season ahead.
What the numbers on the measuring stick actually tell you.
Why Central and South Texas rivers go from gravel beds to fifty-year records in an afternoon - including July 2026 on the Nueces.
One percent, every year, forever - unwrapping hydrology's most misunderstood phrase, and how it differs from our own percentiles.
Rio Grande de Arecibo near San Pedro Water Level
Live river level, flow, historical records and forecast for Rio Grande de Arecibo near San Pedro in PR, United States, built from official government gauge data.
- Location PR, United States
- Watershed cibuco guajataca
- Primary gauge 50027600 (USGS)
About Rio Grande de Arecibo near San Pedro
Rio Grande de Arecibo - A vital river in the Cibuco-Guajataca watershed.
The Rio Grande de Arecibo flows near San Pedro, Puerto Rico, serving as an essential component of the local hydrology. This river contributes to the broader Cibuco-Guajataca watershed, an area that depends heavily on its rainfall-driven flow patterns, especially given the tropical island's propensity for flash floods driven by tropical weather systems.
## The watershed context The Cibuco-Guajataca watershed encompasses a network of rivers, including the Rio Grande de Arecibo, which drains approximately 174 square miles. This extensive drainage basin facilitates the watershed's role in managing the rapid influx of water during heavy rain events, common throughout the year. The river's peers, such as the Canal de Aguadilla and Lago Guerrero, further illustrate the interconnected nature of these water bodies in Puerto Rico's tropical landscape. The seasonal patterns characterized by frequent storms underscore the importance of understanding the river's flow, as they can rise significantly in a short time due to heavy rainfall.
## Why the data matters here The US Geological Survey (USGS) monitors the Rio Grande de Arecibo for both water levels and discharge. Today's reading, when compared against the median for this calendar day spanning over 25 years of records, provides a clearer understanding of current conditions. This context is far more revealing than raw elevation alone, allowing for better predictions of potential flooding and water management strategies. Monitoring the river's flow is crucial for local residents, businesses, and the overall health of the watershed.
How this page is built
Readings come from official government gauges and are rolled into daily records: the daily mean, high and low for every day on record. Each calendar day gets its own baseline from the full history, so the level you see is compared against what this specific date usually looks like rather than an annual average.
How Nibi Metrics works · Water stories
