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
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.
Inside the freshet cycle that puts Manitoba shorelines at risk each year - and why 2026 broke the script.
The science of snow water equivalent and why it drives the season ahead.
What the numbers on the measuring stick actually tell you.
Why Central and South Texas rivers go from gravel beds to fifty-year records in an afternoon - including July 2026 on the Nueces.
One percent, every year, forever - unwrapping hydrology's most misunderstood phrase, and how it differs from our own percentiles.
Honouliuli Str at H-1 Freeway near Waipahu, Oahu Water Level
Live river level, flow, historical records and forecast for Honouliuli Str at H-1 Freeway near Waipahu, Oahu in HI, United States, built from official government gauge data.
- Location HI, United States
- Watershed oahu
- Primary gauge 16212490 (USGS)
About Honouliuli Str at H-1 Freeway near Waipahu, Oahu
Honouliuli Stream - a dynamic waterway shaped by rainfall.
The Honouliuli Stream flows beneath the H-1 Freeway near Waipahu, Oahu, offering a glimpse into the island’s intricate hydrology. This river is part of the Oahu watershed and is closely related to the island's unique weather patterns, where intense rainstorms can rapidly increase water levels. Functioning within a tropical island climate, this stream exemplifies how quickly rainfall can generate flash floods in steep basins, pointing to the need for observers and residents to stay vigilant during storm events.
The watershed context
Draining approximately 10.6 square miles (about 27.5 square kilometers), Honouliuli Stream serves as a vital watercourse on the island, interacting with its peers such as Heeia Stream, Kahaluu Stream, and the Kalihi Stream. The hydrology of Oahu, driven by seasonal rainfall rather than snowmelt, leads to dramatic fluctuations in streamflow that can peak in minutes to hours. This rapid response is a hallmark of Hawaii’s tropical environments where major storm systems, like trade-wind and Kona storms, play a significant role in shaping the water levels and flow within the region.
Why the data matters here
Monitoring the stream’s flow is essential not only for understanding local ecosystem health but for community safety as well. Real-time data provides crucial insights into water levels, helping residents and officials prepare for potential flooding during heavy rain events. Today's reading, obtained from the U.S. Geological Survey (USGS), can be compared against the historical median for this calendar day. This comparison offers a clearer narrative than just raw elevation numbers, presenting a valuable context that accounts for natural variability over the 14 years of recorded data. Understanding these patterns helps in managing the waterway and protecting the surrounding communities.
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
