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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 Jacaguas at Juana Diaz Water Level

Live river level, flow, historical records and forecast for Rio Jacaguas at Juana Diaz in PR, United States, built from official government gauge data.

About Rio Jacaguas at Juana Diaz

Rio Jacaguas - A vital waterway in Southern Puerto Rico.

The Rio Jacaguas flows through Juana Diaz, contributing significantly to the region's hydrology. This river is part of the Southern Puerto Rico watershed, draining approximately 51.5 square miles above the USGS monitoring station. The catchment area is particularly responsive to the rainfall-driven hydrology characteristic of tropical islands, which can lead to rapid changes in water levels.

## The watershed context The Southern Puerto Rico watershed encompasses several nearby water bodies, including the Aes Intake Canal and various segments of the Canal de Juana Diaz. This network of rivers and canals supports a rich tapestry of ecological interactions, while also serving practical needs such as irrigation and water supply. Given the steep topography and short basins typical of this area, the Rio Jacaguas can experience flash floods, especially during heavy rainfall events associated with hurricanes and tropical waves.

## Why the data matters here Water levels at the Rio Jacaguas are monitored by the U.S. Geological Survey (USGS), providing vital information concerning river conditions, flood risks, and overall watershed health. Today's water level reading is important, as it compares to the median for this calendar day based on 42 years of historical data. This comparison helps predict trends and better understand the river's behavior over time, making it a crucial resource for locals and stakeholders who rely on accurate water information for various activities, from agriculture to flood management.

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