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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.

Waikamoi Str above Kula PL intake near Olinda, Maui Water Level

Live river level, flow, historical records and forecast for Waikamoi Str above Kula PL intake near Olinda, Maui in HI, United States, built from official government gauge data.

About Waikamoi Str above Kula PL intake near Olinda, Maui

Waikamoi Stream - A vital mountain stream on Maui.

Located on the lush island of Maui, Waikamoi Stream flows just above the Kula Power Light intake near Olinda. This stream is a crucial part of the broader Maui watershed, where tributaries and small streams converge to nourish the landscape. Given Maui's tropical island hydrology, this stream responds rapidly to rainfall, leading to potential flash floods for those in the vicinity.

The watershed context

The Waikamoi Stream is part of a dynamic network of waterways in Maui, a region characterized by steep basins that can experience significant fluctuations in water level due to sudden rainstorms. Flash floods can develop within minutes to hours, influenced by trade winds and Kona storms. The area is surrounded by several other streams, including Haipuaena Stream and Hanawi Stream, which further enrich the hydrology and ecology of the island. With a drainage area of approximately 2.5 square miles upstream of this station, Waikamoi Stream plays an essential role in managing precipitation runoff and maintaining the habitat within its ecosystems.

Why the data matters here

Real-time hydrological data from the U.S. Geological Survey (USGS) provides vital insights into the stream's behavior, particularly during rainfall events. Monitoring the stream level not only alerts residents to potential flooding risks but also aids in understanding the ecological health and flow dynamics of Waikamoi Stream. Today’s reading compared to the median for this calendar day over the last sixteen years reveals crucial information about water levels. Assessing the current measurement in relation to historical data helps to understand whether the stream is experiencing typical conditions or significant anomalies. This context is essential for local stakeholders, including residents, cottagers, and environmental researchers, making the data from Waikamoi Stream invaluable.

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