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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.

Waikoloa Str at Marine Dam near Kamuela Water Level

Live river level, flow, historical records and forecast for Waikoloa Str at Marine Dam near Kamuela in HI, United States, built from official government gauge data.

About Waikoloa Str at Marine Dam near Kamuela

Waikoloa Stream - A dynamic waterway shaped by rainfall.

The Waikoloa Stream flows with vitality at the Marine Dam near Kamuela, Hawaii. This river, part of a complex network in the Hawaii watershed, is influenced predominantly by the unique tropical island hydrology characteristic of the region. As one of the numerous streams feeding this area, it plays a crucial role in the local ecosystem and serves various purposes from hydrological monitoring to recreational activities.

The watershed context

Waikoloa Stream is a vital water body within Hawaii's intricate watershed system. It is surrounded by several peers, including Alakahi Stream, Hakalau Stream, and Kawainui Stream, all contributing to the hydrology of the region. The steep terrains of Hawaii facilitate a rapid rise in water levels during periods of intense rainfall, leading to potential flash flooding. This tropical pattern underscores the importance of vigilance and awareness for those living and working around these waterways, as conditions can change swiftly.

The absence of a snowmelt season in Hawaii places greater emphasis on rainfall as the primary driver of water levels in the streams. This means that monitoring rainfall and understanding its impact on stream levels is vital for effective management and safety in the region. The interplay between seasonal rain and stream flow can affect everything from agriculture to local habitats.

Why the data matters here

Understanding the water levels at Waikoloa Stream is essential for multiple stakeholders in the area. The gauge, operated by the U.S. Geological Survey (USGS), provides crucial data regarding stream levels that can inform flood alerts and water resource management. Today's reading from the gauge reflects the stream's current elevation, compared against the median for this calendar day across more than 50 years of historical data. This comparison is essential because it gives context to today's conditions rather than just a raw reading, allowing for better forecasting and planning. Keeping an eye on these numbers helps ensure that communities and ecosystems remain resilient in the face of Hawaii's intense rain-driven hydrology.

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