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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.

Waiahole Stream above Kamehameha Highway, Oahu Water Level

Live river level, flow, historical records and forecast for Waiahole Stream above Kamehameha Highway, Oahu in HI, United States, built from official government gauge data.

About Waiahole Stream above Kamehameha Highway, Oahu

Waiahole Stream - a lively watercourse shaped by island storms.

Located above Kamehameha Highway on Oahu, Waiahole Stream channels the island's vibrant hydrology. This stream operates within a rainfall-driven environment, where storm events can cause rapid fluctuations in water levels. With a drainage area encompassing approximately 3.8 square miles, Waiahole Stream plays a significant role in managing the high-intensity rain events characteristic of Hawaii’s tropical climate.

The watershed context

The Waiahole Stream is part of the broader Oahu watershed, which comprises numerous streams and rivers. The stream connects to other local waterways such as Heeia Stream and Kahana Stream. Given Oahu's mountainous terrain and short basins, the region experiences quick responses to precipitation, resulting in flash floods that are often driven by trade winds and seasonal Kona storms. As rainfall collects swiftly, water levels can rise dramatically in a matter of minutes to hours, making it crucial for those living and working nearby to keep abreast of current water conditions.

Why the data matters here

Monitoring the Waiahole Stream is vital for understanding its flow dynamics and managing potential flooding risks in the area. Today's reading of the stream is measured by the USGS and, like any river gauge, allows for comparisons against the historical median for this calendar day. This measurement is more informative than merely looking at the raw elevation, as it contextualizes current conditions within the stream's historical behavior over 25 years of record-keeping. Adapting to Oahu's unique flood risks begins with awareness of the data, allowing residents and stakeholders to make informed decisions during intense weather events.

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