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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 Rosario near Hormigueros Water Level

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

About Rio Rosario near Hormigueros

Rio Rosario - A vital flow in the Culebrinas-Guanajibo watershed.

The Rio Rosario, located near Hormigueros, Puerto Rico, serves as an important waterway within the Culebrinas-Guanajibo watershed. This river contributes to the intricate network of streams and rivers in the area, enhancing the region's ecology and hydrology. With a drainage area of approximately 18.3 square miles, Rio Rosario plays a significant role in managing rainfall runoff and the natural flow of water, particularly in the context of Puerto Rico's tropical hydrology.

The watershed context

The Culebrinas-Guanajibo watershed is characterized by its rainfall-driven hydrology, making it susceptible to flash floods throughout the year, exacerbated during hurricane season and tropical wave events. This rapid response to heavy rainfall can result in steeper and more intense river flows, making monitoring vital for flood management and ecological health. The Rio Rosario’s flow dynamics are closely linked to this watershed, ensuring the sustenance of local habitats while also impacting nearby communities.

Surrounding waterways, including the Canal de Riego de Lajas and the Rio Guanajibo, further contribute to the interconnectedness of this watershed. Each of these rivers plays a role in runoff management, sediment transport, and supporting the diverse flora and fauna that thrive along their banks.

Why the data matters here

Monitoring the Rio Rosario is essential for various stakeholders, including farmers, cottagers, and flood-watchers. The data provided by the U.S. Geological Survey gives insights into water flow and elevation, which can be critical for planning agricultural activities and ensuring safe access to the river and surrounding areas, especially after heavy rainfall events. Today's reading reflects a vital measure of stream health and flood risk when compared against the median for this calendar day over the station's historical record of 41 years. This context helps local residents and authorities better understand current conditions, allowing for informed decisions in managing water resources and responding to potential flash floods.

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