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
Alaska is experiencing significant weather impacts across multiple regions through Sunday. Southeast Alaska, particularly Yakutat and the Northeastern Gulf Coast, faces 2-4 inches of rainfall from an atmospheric river system with gale-force winds and seas up to 18 feet expected through Sunday afternoon. Southcentral Alaska, including Anchorage, the Kenai Peninsula, Portage, and Palmer, will experience strong southeast winds of 20-45 mph with gusts reaching 50-60 mph from late Sunday morning through evening; the Anchorage Hillside and Portage areas face the most severe conditions with isolated gusts to 60 mph. The Eastern Alaska Range north of Trims Camp is under a Wind Advisory with gusts to 60 mph from 1 PM Sunday to 1 AM Monday. Critical fire weather conditions are possible in Delta Junction and Yukon Flats Sunday afternoon due to low humidity (25%) and gusty winds despite incoming moisture. Additionally, the Brooks Range and North Slope face rising river levels from snowmelt and 0.5-1.0 inches of rainfall expected through Wednesday. Residents should secure loose objects, exercise caution with high-profile vehicles, and monitor conditions closely.
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.