Alaska River Levels & Streamflow
Live discharge, gauge height, and percent-of-normal for every USGS streamgauge in Alaska.
Alaska river map
See Alaska’s rivers on a live map
Every gauge, river and reservoir, one tap each:
- Rivers now — which are running high or low
- Reservoirs — how full each one is vs normal
- Rain — past 24 hrs and the 72-hr forecast, press play
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Alaska river conditions today
Where rivers are running versus normal, what’s spiking and what’s coming — refreshed daily from USGS and NOAA.
The Alaska streamflow picture is tracked by the USGS National Water Information System — the federal real-time record for U.S. rivers. Snoflo joins the live gauge readings to a 7-day NOAA weather forecast for each station so you can see what's flowing today and what's coming.
Tap any gauge below for its full hydrograph and historical context. Use the rivers panel to jump into named rivers, or the paddle-runs section to find runnable whitewater in the state.
For flood-life-safety decisions, always cross-reference with your local NWS forecast office and your state emergency management.
Active weather warnings for Alaska
Alaska is experiencing significant wind impacts across multiple regions due to a strong low-pressure system. A High Wind Warning remains in effect for Unalaska and Nikolski until Saturday 4:00 PM, with gusts reaching 60 mph expected overnight into Saturday morning, potentially causing power outages and damage to unsecured objects. Wind Advisories are also active for the Eastern Alaska Range north of Trims Camp and Windy Pass through early Sunday morning, with gusts up to 70 mph possible Saturday morning. Residents and travelers in these areas should secure loose outdoor items, exercise caution while driving—especially in high-profile vehicles—and prepare for potential service disruptions. Conditions are expected to improve by Saturday afternoon in Southwest Alaska, though impacts will linger through Sunday morning in interior regions.
Alaska flow report
Alaska river runs
Paddleable river sections in Alaska keyed to USGS gauges, with live streamflow and whitewater class.
| River run | Status | Streamflow | Air temp | Class |
|---|---|---|---|---|
| Lake Chelatna To Yetna | · | · | 22°F | I TO IV- |
| Stephan Lake To Susitna River | · | · | 14°F | III TO IV |
About Alaska streamflow
Are Alaska rivers high or low right now?
Compare the statewide percent-of-normal on this page: above 100% means Alaska rivers are running higher than the seasonal average for the date, below 100% means lower (a dry spell or drought). Each gauge also shows its own percent of median.
Where does the Alaska streamflow data come from?
The U.S. Geological Survey National Water Information System. USGS streamgauges report continuously (every 15 minutes) and the data is the canonical real-time record for U.S. rivers. Snoflo pulls the latest readings and joins them to a 7-day NOAA weather forecast for each station.
What is cfs?
Cubic feet per second — the standard unit for streamflow. One cfs is about 7.5 gallons per second. Small creeks run at single-digit cfs; the Mississippi at hundreds of thousands.
What does Gauge Height mean?
The water level at the gauge in feet above the reference datum. Used together with discharge to track river state. Flood stage and runnable levels are typically expressed in gauge height (e.g., "flood at 16 ft").
How fresh is the Alaska data?
USGS streamgauges report every 15 minutes; Snoflo re-pulls throughout the day. The AI briefing regenerates daily.
Can I get a flow alert for a Alaska gauge?
Yes. Save any USGS gauge as a favorite in the Snoflo iOS app, set a discharge or stage threshold (e.g. "alert me when discharge crosses 2,000 cfs"), and you'll get a push the moment it crosses.
Is this a substitute for an NWS flood warning?
No. Snoflo is informational. For flood life-safety decisions always follow guidance from your local NWS forecast office and state emergency management. Snoflo data is one input among several.