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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.

Halaulani Str at alt 400 ft near Kilauea, Kauai Water Level

Live river level, flow, historical records and forecast for Halaulani Str at alt 400 ft near Kilauea, Kauai in HI, United States, built from official government gauge data.

About Halaulani Str at alt 400 ft near Kilauea, Kauai

Halaulani Stream - A dynamic waterway shaped by Kauai's unique landscape.

Nestled in the lush surroundings of Kilauea, Halaulani Stream is a vibrant watercourse that showcases the island's distinctive hydrology. As a tributary, it drains a catchment area of approximately 1.2 square miles, reflecting the rapid shifts in water levels typical of tropical island streams. The stream experiences swift fluctuations due to rainfall-driven events, characteristic of Kauai's steep terrain, which allows for fast runoff into the waterway.

The watershed context

Halaulani Stream is situated within the Kauai watershed, a region characterized by its steep gradients and susceptibility to tropical storms. The seasonal weather patterns here are profoundly influenced by trade winds and Kona storms, which deliver heavy rainfall and can trigger flash floods in a matter of minutes to hours. The upstream area contributes to the stream's flow, offering essential insight into watershed management and ecosystem health.

Surrounded by other water bodies, Halaulani Stream finds its peers among several notable waterways, including the East Branch of the North Fork Wailua River and the Hanalei River. Together, these watercourses play vital roles in the hydrology of Kauai, supporting diverse ecosystems and influencing local climate patterns.

Why the data matters here

Monitoring at the Halaulani Stream station, operated by the U.S. Geological Survey (USGS), provides critical data on current water levels and discharge rates. Today's measurement, assessed against the historical median for this calendar day across more than 50 years of records, gives a clearer picture of how conditions compare to the usual patterns. This approach surpasses mere elevation readings—it highlights anomalies and trends that can be crucial for understanding the stream’s behavior in response to rainfall and potential flooding events. Such data is invaluable for local residents, stakeholders, and anyone engaged in activities impacted by the stream's dynamics.

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