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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.

Little Colorado Rvr Blw Zion Reservoir. near ST Johns Water Level

Live river level, flow, historical records and forecast for Little Colorado Rvr Blw Zion Reservoir. near ST Johns in AZ, United States, built from official government gauge data.

About Little Colorado Rvr Blw Zion Reservoir. near ST Johns

Little Colorado River Below Zion Reservoir - A vital channel of the Upper Little Colorado.

Flowing gently beneath the watchful gaze of Arizona's high desert, the Little Colorado River below Zion Reservoir near St. Johns carves its path through the landscape, shaped by the region's unique hydrology. This river plays a crucial role in the Upper Little Colorado watershed, which encompasses a diverse ecosystem supported by the influx of both monsoon rains and winter snows from higher altitudes.

The watershed context

The Little Colorado River, revered for its seasonal variations, acts as a lifeline for its surrounding areas. Fed intermittently by summer monsoon thunderstorms that can bring violent flash floods, this river can transform dramatically during the rainy season, while winter storms frequently bring snowmelt that bolsters flows in the larger waterways. This rhythm keeps the river's health dynamic and reflects the essence of the arid Southwest's climate. Moreover, the drainage area above this station spans approximately 1,171 square miles, providing critical input from both local streams and occasional precipitation. Its most notable peers include the Little Colorado River at Woodruff and below Salado Springs, each contributing to the overall vitality and diversity of the watershed.

Why the data matters here

Monitoring data from the U.S. Geological Survey (USGS) allows us to understand the river's flow dynamics and overall health. Data collection includes discharge measurements, which help gauge the water's behavior as it fluctuates between dry spells and seasonal floods. Today's reading is compared against the median for this calendar day, pulling from an extensive historical data set spanning 28 years. This approach provides a clearer picture of current conditions, helping local farmers, cottagers, and conservationists understand how today’s water levels reflect typical patterns and assist in planning and management efforts. This contextual framework enriches our understanding of the Little Colorado River's role, ensuring informed stewardship of both the river and its surrounding ecosystems.

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