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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.

Wailuku River near Kaumana Water Level

Live river level, flow, historical records and forecast for Wailuku River near Kaumana in HI, United States, built from official government gauge data.

About Wailuku River near Kaumana

Wailuku River - a rainfall-driven waterway in Hawai‘i.

The Wailuku River near Kaumana is a vital river system in Hawaii, reflecting the dynamic rainfall patterns typical of the region. Its upstream catchment, draining approximately 38.5 square miles, is shaped by localized precipitation events that can lead to rapid rises in water levels. This behavior exemplifies the island's tropical hydrology, where rainfall can cause flash floods to develop quickly, particularly during trade-wind and Kona storm occurrences.

The watershed context

The Wailuku River is part of the greater Hawaii watershed, surrounded by several other streams, including Alakahi Stream near Kamuela and Hakalau Stream, which share the distinctive quick response characteristic of the local hydrology. The interconnections between these waterways create a web of ecological habitats that are nourished by the periodic influx of freshwater as storms bring rainfall.

Hawaii's lack of a snowmelt season means that the rivers are primarily fed by rainwater. The understanding of these flows is critical for various stakeholders in the area, including farmers, local communities, and environmental monitoring agencies.

Why the data matters here

Monitoring the Wailuku River provides essential insights into the current water conditions of the area. As part of the records maintained by the U.S. Geological Survey (USGS), the data offered is crucial for understanding the river's behavior and its seasonal rhythms. Today's flow reading, when compared against the median for this calendar day over the past 50 years, offers a clear sense of the river's current state, allowing for effective management and response measures during flash flood events. Such comparisons are invaluable, as they ensure awareness of rising or declining water levels, facilitating informed decision-making for all river users.

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