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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

The flood of record that was overtaken

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.

Why the Assiniboine floods every spring

Inside the freshet cycle that puts Manitoba shorelines at risk each year - and why 2026 broke the script.

How snowpack becomes summer water

The science of snow water equivalent and why it drives the season ahead.

Reading a staff gauge like a hydrologist

What the numbers on the measuring stick actually tell you.

Flash Flood Alley: how Texas rivers rise in hours

Why Central and South Texas rivers go from gravel beds to fifty-year records in an afternoon - including July 2026 on the Nueces.

What a "100-year flood" actually means

One percent, every year, forever - unwrapping hydrology's most misunderstood phrase, and how it differs from our own percentiles.

Rio Grande de Manati near Manati Water Level

Live river level, flow, historical records and forecast for Rio Grande de Manati near Manati in PR, United States, built from official government gauge data.

About Rio Grande de Manati near Manati

Rio Grande de Manati - A dynamic river shaped by tropical rainfall.

Flowing through the inviting landscapes of Puerto Rico, the Rio Grande de Manati presents a vivid example of the hydrological influences characterizing tropical island environments. This river plays a crucial role in the Cibuco-Guajataca watershed, draining approximately 158 square miles before joining the intricate waterways of the region. Known for its responsiveness to rainfall, the Rio Grande de Manati exemplifies rapid hydrological changes, particularly during intense weather events such as hurricanes.

The watershed context

The Cibuco-Guajataca watershed encompasses a variety of water bodies that exhibit significant interactions during periods of heavy rainfall. The river’s surrounding peers include several notable canals and lakes, including the Canal de Aguadilla above Lago Ramey and Lago Guerrero near Isabela. These connections highlight the river's importance within a broader network of waterways that respond dynamically to both seasonal and episodic rainfall, particularly from tropical waves and storms that frequently impact Puerto Rico.

Given the island's steep terrain, it is not uncommon for water levels in the Rio Grande de Manati to change dramatically in a short span of time, which can lead to flash flooding. Local ecosystems rely on these fluctuations to maintain their health, while also presenting challenges for land management and flood preparedness.

Why the data matters here

Today's hydrological measurements from the Rio Grande de Manati near Manati are critical for understanding its current conditions in the context of historical data. The U.S. Geological Survey (USGS) provides continuous monitoring of water levels and discharge, allowing for ongoing analysis. Today's reading compared to the median for this calendar day across the station's historical record (spanning more than seven years) offers insights into how the river's water level stands relative to typical conditions for this time of year.

Monitoring the data from the Rio Grande de Manati not only aids in flood prediction but also helps inform the ecological health of the area. With each storm, the interplay of rainfall and river flow shapes the landscape, influencing both aquatic and terrestrial biodiversity. Engaging with this data is essential for the communities, cottagers, and resource managers who depend on the river's various contributions throughout the year.

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