Alaska streamflow
Live discharge, gauge height, water temperature, and percent-of-normal readings from every USGS streamgauge in Alaska. Built for paddlers, anglers, water managers, and flood researchers.
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
A significant windstorm is impacting Alaska as a Gulf of Alaska storm system moves northward, bringing unseasonably strong winds across multiple regions through Sunday. The Anchorage Bowl, Turnagain Arm, and Portage Valley face sustained winds of 20-30 mph with gusts up to 55 mph, while the Knik River Valley, Palmer, and Butte areas experience stronger conditions with sustained winds of 25-35 mph and gusts up to 50 mph (isolated gusts to 55 mph), creating hazardous blowing dust and reduced visibility. Prince William Sound, Cordova, Whittier, and the Kenai Peninsula, including Homer, are also affected with gusts of 30-45 mph. A Wind Advisory for Anchorage and Eagle River Hillsides warns of southeast winds 35-45 mph with gusts up to 70 mph through Sunday evening, with possible isolated gusts to 75 mph at higher elevations. Additionally, Yakutat is under a Frost Advisory and Freezing Fog Advisory until 8 AM with visibility down to a quarter mile, while the Yukon River basin faces flooding concerns from ongoing snowmelt. Residents should secure loose objects, exercise caution when driving high-profile vehicles, and prepare for hazardous travel conditions.
Alaska USGS streamgauges
Every USGS gauge Snoflo tracks in Alaska. Sortable, quickly filterable. Numeric columns heat-mapped from light to deep. Tap any gauge for its full hydrograph and forecast.
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
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.