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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.

Oheo Gulch at dam near Kipahulu, Maui Water Level

Live river level, flow, historical records and forecast for Oheo Gulch at dam near Kipahulu, Maui in HI, United States, built from official government gauge data.

About Oheo Gulch at dam near Kipahulu, Maui

Oheo Gulch - A vibrant river driven by tropical rains.

Oheo Gulch runs through the lush landscapes of Maui, capturing the essence of the island's rainfall-driven hydrology. Located near Kipahulu, this river is closely monitored by the U.S. Geological Survey (USGS), providing valuable insights into its water levels and flooding potential. With a drainage area of roughly 8.5 square miles, Oheo Gulch serves as a vital catchment for the intense rain that can lead to rapid water level rises and flash floods.

The watershed context

The Oheo Gulch drainage area is part of the Maui watershed, which includes other notable streams such as Haipuaena Stream and Hanawi Stream. This network of streams gives way to a dynamic hydrological system characterized by steep short basins. The region's tropical rainfall patterns are influenced by trade winds and seasonal storms, which can result in sudden spikes in water levels. Unlike many other regions, there's no traditional snowmelt season here; instead, the hydrology of Maui is shaped almost entirely by rainfall.

Why the data matters here

Understanding water levels at Oheo Gulch is critical for assessing flood risks, especially given the propensity for flash flooding in the region. The current reading from the USGS is compared against the historical median for this calendar day over the past 38 years, providing context that raw elevation numbers alone cannot offer. This data is essential not just for local residents, but also for visitors and anyone engaging in outdoor activities around Kipahulu. By keeping an eye on these metrics, stakeholders can better prepare for the effects of sudden storms and heavy rainfall 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