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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.

Kamananui Str at Maunawai, Oahu Water Level

Live river level, flow, historical records and forecast for Kamananui Str at Maunawai, Oahu in HI, United States, built from official government gauge data.

About Kamananui Str at Maunawai, Oahu

Kamananui Stream - A vital channel in Oahu's lush landscape.

Kamananui Stream flows at Maunawai, Oahu, in a dynamic tropical setting characterized by intense rainfall events. As part of the Oahu watershed, this stream serves as an important indicator of hydrological activity in the area, particularly given Hawaii's unique rainfall-driven hydrology, which can lead to rapid fluctuations in water levels.

The watershed context

The Kamananui Stream drains roughly 12.4 square miles (32 square kilometers) of the Oahu watershed, contributing to the area's rich ecosystem. Located on the island of Oahu, it shares its space with several nearby streams and bodies of water, including Heeia Stream and Kahaluu Stream. These neighboring waterways, like Kamananui Stream, respond swiftly to rainfall, influencing local geography and sediment dynamics.

Oahu's water patterns are heavily shaped by trade winds and Kona storms, which can create flash floods in short basins. This rainfall-driven cycle is unique to the region, as there is no snowmelt season influencing water levels. Consequently, observing water levels in Kamananui Stream is particularly relevant for local residents and stakeholders as they navigate the implications of sudden weather changes.

Why the data matters here

Today's readings from the Kamananui Stream at Maunawai are instrumental for understanding the current hydrological state of the area. Monitoring the stream allows for valuable insights into short-term trends and extreme weather events, providing essential information for flood preparedness and natural resource management.

The US Geological Survey (USGS) operates the gauge, and today's reading, compared against the median for this calendar day over more than 50 years of historical records, showcases the stream's response patterns. Understanding how today’s measurement aligns with expected norms helps define community responses to rainfall and potential flooding scenarios.

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