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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 de la Plata at Cayey Water Level

Live river level, flow, historical records and forecast for Rio de la Plata at Cayey in PR, United States, built from official government gauge data.

About Rio de la Plata at Cayey

Rio de la Plata - A vital waterway in Eastern Puerto Rico.

The Rio de la Plata at Cayey flows through the heart of Eastern Puerto Rico, serving as an essential watercourse for both natural ecosystems and local communities. This river is an important feature of a tropical island hydrology, characterized by rainfall-driven flash floods that can occur rapidly, especially during seasonal storms.

Why the data matters here

Rio de la Plata is monitored by the U.S. Geological Survey (USGS) and boasts a drainage area of approximately 37.4 square miles upstream of the gauge. This measurement is crucial in understanding water flow dynamics, particularly in a region susceptible to sudden weather changes. The catchment’s responsiveness means that residents and authorities must remain vigilant during rain events, as the river can rise quickly.

Today's reading from the Rio de la Plata at Cayey is compared against historical data, noting the importance of measurement compared to the median for this calendar day over the last four years of record. This data informs decision-making in a landscape where flash flooding can pose risks to people and property, underlining the essential role of real-time water level monitoring.

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