Lewis River Flow Today
As of November 4, 2026 at 12:00 AM, the Lewis River is flowing at 2,570 cfs at Ariel, WA — 60% of normal for the date and down 40% in 24 hours. 2 of 2 USGS gauges reported in the last 3 days; flows range from 220 to 2,570 cfs. ❤ Favorite
Lewis River map
See the Lewis River on a live map
Every gauge, dam and paddle run on the river, one tap each:
- Gauges now — which reaches are high or low
- Dams & paddle runs — storage and what’s in range
- Rain — past 24 hrs and the 72-hr forecast, press play
✓ Free for 7 days · ✓ Cancel anytime
Lewis River conditions today
Where the river is running versus normal, what’s rising or dropping, and what it means for a trip — built from the live USGS readings below.
At Ariel, the Lewis River is running 2,570 cfs — 60% of normal, down 40% since yesterday. Along the river, 2 of 2 reporting gauges are below normal (the typical gauge is at 50% of normal).
In the last 24 hours the river is dropping at Ariel (-40%).
How the Lewis River compares to normal
Every reporting gauge from the top of the river to the bottom: bar length is today’s flow, colour is percent of normal for the date.
Flow along the river, upstream to downstream
- Cougar1,085 ft 220 cfs40%
- Ariel49 ft 2,570 cfs60%
Bar length uses a square-root scale so small headwater flows stay visible next to big downstream ones. Colour: <50% 50–90 90–110 110–150 150%+ of normal.
Where every gauge sits
One dot per Lewis River streamgauge, placed by its own percent of normal. The line is the typical gauge (50%).
Lewis River flow report
| Streamgage | Streamflow | % of normal | 24h | Gage height | Elevation |
|---|---|---|---|---|---|
|
Lewis River Above Muddy River Near Cougar WA
Nov 3, 11:30 PM · USGS 14216000 |
220 cfs | 40% | -7% | 1.02 ft | 1,085 ft |
|
Lewis River At Ariel WA
Nov 4, 12:00 AM · USGS 14220500 |
2,570 cfs | 60% | -40% | 2.51 ft | 49 ft |
USGS provisional data. Readings are in each gauge’s local time; gauges silent for more than 3 days are marked “Last reported”. Tap any gauge for its hydrograph, forecast and history.
Lewis River streamflow over time
Daily total flow across every monitored gauge on the river.
Maximum streamflow by year
Lewis River
The Lewis River is located in southwestern Washington state and stretches 95 miles, originating from the western slopes of Mount Adams. Historically, the river was used by the Chinook Indians as a trading and fishing route. Today, it is primarily used for hydroelectric power and is managed by the Pacific Power and Light Company. The river is dammed in several locations, including the Merwin Dam, Yale Dam, and Swift Dam, which create reservoirs for power generation and recreational activities such as fishing, boating, and swimming. The river also supports agriculture in the region, with farms located along its banks producing crops such as berries and vegetables. The Lewis River remains an important resource for the community, providing power, recreation, and sustenance.
About the Lewis River
How is the Lewis River flowing right now?
As of November 4, 2026, the Lewis River is flowing at 2,570 cfs at Ariel, WA, about 60% of normal for the date. Across its 2 USGS gauges, current flows range from 220 to 2,570 cfs. Every gauge’s live reading is in the table above.
Is the Lewis River running high or low?
The typical gauge on the Lewis River is at 50% of normal for the date. Above 100% means higher than the historical average for this calendar day; below 100% means lower. The profile above shows which reaches are high or low.
Where does the data come from?
Discharge and gage height are from the USGS National Water Information System; flood stages from the National Weather Service. The history chart sums every monitored gauge on the river.
Can I get alerts for a gauge?
Yes — open any gauge from the table, favorite it in the Snoflo app and set a flow threshold.