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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.

Terror R at Mouth near Kodiak AK Water Level

Live river level, flow, historical records and forecast for Terror R at Mouth near Kodiak AK in AK, United States, built from official government gauge data.

About Terror R at Mouth near Kodiak AK

Terror River - An untamed waterway in Kodiak.

The Terror River flows gracefully to the sea near Kodiak, Alaska, offering vital water resources to the surrounding Kodiak-Afognak Islands watershed. With a drainage area of approximately 46 square miles feeding into this river, it plays a significant role in the hydrology of the region, influenced by the subarctic climate characterized by seasonal rhythms of snowmelt and ice dynamics.

The watershed context

Nestled within the Kodiak-Afognak Islands, the Terror River joins the ranks of neighboring water bodies, such as the Red Cloud River. The entire watershed is shaped by the natural patterns of subarctic hydrology. Typically, this region experiences a pronounced spring breakup, where the melting snow creates surges in water flow. During these events, the river can see increases in water levels, often accompanied by the threat of ice jams, which can alter the flow dynamics significantly.

As summer approaches, the water levels are driven by snowfall and glacial melts further afield. While the winter months bring low flows under the ice, spring thaws create a stark contrast, signaling a time when the river is most active. The cyclical nature of these seasonal changes is vital for the aquatic ecosystem, impacting everything from fish habitats to water availability.

Why the data matters here

Data from the USGS gauge at Terror River provides essential insights into current conditions and ongoing hydrological trends. By comparing today's reading to the median for this same calendar day based on over 45 years of historical records, you gain a clearer understanding of how current water levels relate to long-term averages. This is critical for those who engage with the waterway for various purposes, such as fishing enthusiasts, environmental researchers, and community planners. Understanding these trends enhances the ability to manage and appreciate the river’s role in the local ecosystem and human activities.

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