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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.

Kaukonahua Stream blw Wahiawa Reservoir, Oahu Water Level

Live river level, flow, historical records and forecast for Kaukonahua Stream blw Wahiawa Reservoir, Oahu in HI, United States, built from official government gauge data.

About Kaukonahua Stream blw Wahiawa Reservoir, Oahu

Kaukonahua Stream - A dynamic river in Oahu's rainforest.

Kaukonahua Stream flows below the Wahiawa Reservoir, coursing through the lush landscapes of Oahu. This river is significant within its watershed, responding rapidly to the frequent rainfall that characterizes island hydrology. The stream is one of several that shape the Oahu region, creating a complex network of waterways that share their resources and ecological dynamics.

The watershed context

The Kaukonahua Stream is part of the Oahu watershed, which experiences a unique hydrological cycle driven primarily by rainfall, resulting in flash floods that can develop within minutes during intense weather. Unlike many regions that rely on seasonal snowmelt, this river is influenced by the seasonal variations of tropical storms and trade winds, leading to sudden increases in water levels. The catchment above the gauge encompasses approximately 16.7 square miles, a relatively small but vital area that informs much about the stream's behavior and health.

Neighboring streams such as Heeia Stream and Helemano 6 Reservoir offer a broader context to the Kaukonahua's flow, exhibiting similar patterns of rapid response during periods of heavy rainfall. This presents vital connections in the ecosystem, as the water quality and quantity in neighboring water bodies can directly affect one another.

Why the data matters here

Understanding the data from the USGS gauge at Kaukonahua Stream is crucial for anticipating and managing the challenges posed by flooding in the region. Today's reading provides insights into the stream's current state compared to historical averages, with today's figure measured against the median for this date across the station's record of 14 years. This context allows local residents, farmers, and decision-makers to gauge whether water levels are typical for the season, taking informed actions when necessary. Monitoring and analyzing these levels is vital in Oahu’s dynamic environment, ensuring both safety and ecological health.

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