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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 Loiza at Caguas Water Level

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

About Rio Grande de Loiza at Caguas

Rio Grande de Loiza - A vital artery in Eastern Puerto Rico.

The Rio Grande de Loiza at Caguas is a key river in the vibrant Eastern Puerto Rico region. Stretching through tropical landscapes, this river flows with a seasonal rhythm influenced primarily by rainfall. Known for its responsiveness to rainfall, the Rio Grande de Loiza serves as a natural channel that supports both the local ecology and the communities nearby.

The watershed context

This river drains approximately 89.8 square miles (or about 233 square kilometers) of land, collecting water from a network of smaller creeks and tributaries. As part of the Eastern Puerto Rico watershed, the Rio Grande de Loiza connects with various nearby water bodies, including Lago Carite at Spillway and Rio Bairoa above Bairoa, Caguas. Given Puerto Rico's tropical island hydrology, the Rio Grande de Loiza is particularly susceptible to flash floods, especially during hurricane season. This attribute necessitates close monitoring, as the river can rise dramatically within hours, reflecting the intense localized rainfall that can occur during storms.

Why the data matters here

Current data from the U.S. Geological Survey (USGS) provides vital insights into the river's conditions and flow patterns, enabling residents and local businesses to make informed decisions in the face of potential flooding. The gauge at the Rio Grande de Loiza not only measures water elevation but also records discharge, giving a comprehensive view of the river's behavior.

Today’s reading represents a valuable snapshot against the historical context, as it can be compared to the median for this calendar day over the past 50 years. This comparison enhances understanding of the river's current behavior beyond mere elevation, helping to paint a fuller picture of potential flood risks or drought conditions. Monitoring these readings is essential for effective water management and public safety in the region.

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