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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 Tanama at Charco Hondo Water Level

Live river level, flow, historical records and forecast for Rio Tanama at Charco Hondo in PR, United States, built from official government gauge data.

About Rio Tanama at Charco Hondo

Rio Tanama - A vital river shaped by intense rainfall.

The Rio Tanama flows gracefully through the lush landscape of Puerto Rico, where its vibrant current reflects the island's dynamic weather patterns. This river, measured at Charco Hondo, acts as an important indicator of the hydrology within the Cibuco-Guajataca watershed. As a rainfall-driven river, the Rio Tanama is particularly susceptible to immediate and dramatic changes, making it a key focus for local observers and hydrologists alike.

The watershed context

The Cibuco-Guajataca watershed encompasses a diverse network of waterways, with the Rio Tanama at its heart. This region experiences heavy rainfall throughout the year, with the potential for flash floods, especially during hurricane season. The steep basins in Puerto Rico's geography lead to rapid runoff, which can elevate river levels within hours. Understanding the Rio Tanama’s response to rainfall is essential for managing potential flood risks and maintaining ecological balance within the watershed.

Nearby, the river connects with various peers, such as the Canal de Aguadilla, Canal de Derivacion at Lago de Guajataca, and Lago Guerrero. These waterways collectively represent the intricate hydrological interdependence across the region, illustrating how each contributes to the broader ecosystem.

Why the data matters here

Currently, the USGS station at Rio Tanama is equipped to measure not only the water level but also the river's discharge. This data is invaluable, especially with a historical record exceeding 45 years, allowing for robust comparisons to understand trends in water level and discharge over time.

Today’s reading serves as a critical representation of the river’s health and activity, evaluated against the median for this calendar day based on the historical data. Monitoring the Rio Tanama’s levels is vital for individuals living and working in the area, particularly during periods of heavy rainfall. Real-time information helps ensure safety and preparedness in the face of natural weather events, reinforcing the significance of maintaining awareness of local water conditions.

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