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SwedenChehalis River at Porter water level
River gauge, Chehalis River, Washington, United States
Right now
High for mid-October
Water level
- Flow
- 350 cfs
History
20252026
The forecast expects the river to fall to 30.47 ft by Friday, October 23 at 11:00 PM. Issued Saturday, October 17 at 08:33 AM by NOAA National Weather Service.
What this means
High water at Chehalis River at Porter: the latest reading is 30.58 ft, above normal for mid-October.
The median for mid-October is 4.74 ft, based on 35 years of readings, so the river stage is 25.84 ft above typical. It is 17.42 ft below the flood stage of 48.00 ft. On the same day last year the reading was 30.33 ft, a difference of +0.25 ft.
It has barely moved over the past 24 hours. The forecast expects the river to fall to 30.47 ft by Friday, October 23 at 11:00 PM. The 30-day range is 30.53 ft – 31.27 ft.
Compared with 35 years of daily readings for this time of year. How to read levels
Key numbers
- Median for this date
- 4.74 ft25.84 ft above the median for this date
- Normal for this date
- 3.19 ft – 30.86 ft8 years in 10 fall in this range (35 years of records)
- Same day last year
- 30.33 ft+0.25 ft
- Lowest and highest in 30 days
- 30.53 ft – 31.27 ft
- Lowest and highest in 12 months
- 30.33 ft – 49.46 ft
- Highest on record
- 53.17 ftDecember 5, 2007
- Forecast peak
- 30.61 ftSaturday, October 17 at 11:00 PM
Paddling and fishing conditions
Above-normal flows push fish to the edges and make wading risky. Wait for the river to drop and clear.
For reference, flood stage is 48.00 ft.
What happens at each level
- 52.00 ft
- the Chehalis River in Grays Harbor will cause major near record flooding from Oakville downstream to Grays Harbor. Deep and swift flood waters will inundate numerous farms and roads...including SR 12. High tidal levels at Aberdeen will worsen flooding along the lower reaches. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Chehalis River Basin.
- 50.00 ft
- feet...the Chehalis River in Grays Harbor will flood numerous farms and roads including SR 12. High tidal levels at Aberdeen will worsen flooding along the lower reaches.
- 49.00 ft
- the Chehalis River in Grays Harbor will flood pasture lands and many roads...including SR 12 between Oakville and Rochester. High tidal levels at Aberdeen will worsen flooding along the lower reaches.
- 48.00 ft
- the Chehalis River in Grays Harbor will flood low pasture lands and some roads. High tidal levels at Aberdeen will worsen flooding along the lower reaches.
- 46.00 ft
- the Chehalis River in Grays Harbor County will locally spill over its banks with shallow water on several roads.
- 30.58 ft
- Right now
Impact statements from the U.S. National Weather Service.
Highest crests on record
Chance of at least minor flooding in October to December: 24 %.
| Rank | Level | Date |
|---|---|---|
| 1 | 53.17 ft | December 5, 2007 |
| 2 | 52.01 ft | January 8, 2022 |
| 3 | 49.64 ft | December 12, 2025 |
| 4 | 49.18 ft | January 15, 2021 |
| 5 | 48.99 ft | January 9, 2020 |
| 6 | 48.79 ft | March 3, 2022 |
| 7 | 48.58 ft | December 23, 2019 |
| 8 | 48.54 ft | December 8, 2023 |
| 9 | 48.36 ft | January 13, 2022 |
| 10 | 48.15 ft | November 14, 2021 |
Weather at the gauge
No rain in the last 3 days.
Forecast: Open-Meteo
Map
Other gauges on the Chehalis River
| Gauge | Level | Compared with normal | 24 hours | Distance |
|---|---|---|---|---|
| Chehalis River near DotyRiver gauge, Chehalis River | 306.11 ft | High | ±0 | 22 mi |
| Chehalis River near AdnaRiver gauge, Chehalis River | 192.87 ft | High | +0.01 ft | 24 mi |
| Chehalis River at Wwtp at ChehalisRiver gauge, Chehalis River | 152.03 ft | No reference yet | +0.03 ft | 25 mi |
| Chehalis River near Grand MoundRiver gauge, Chehalis River | 128.89 ft | High | +0.03 ft | 17 mi |
| Chehalis River near RochesterRiver gauge, Chehalis River | 103.89 ft | Very low | −0.01 ft | 13 mi |
| Chehalis River near MontesanoRiver gauge, Chehalis River | 5.82 ft | High | −1.04 ft | 14 mi |
Nearby gauges
| Gauge | Level | Compared with normal | 24 hours | Distance |
|---|---|---|---|---|
| Satsop River near SatsopRiver gauge, Satsop River | 27.75 ft | High | +0.01 ft | 10 mi |
| Wynoochee River above Black Creek near MontesanoRiver gauge, Wynoochee River | 27.08 ft | High | +0.02 ft | 17 mi |
| Deschutes River at East St Bridge at TumwaterRiver gauge, Deschutes River | 24.48 ft | Low | ±0 | 20 mi |
| Elk Creek below Deer Creek near DotyRiver gauge, Elk Creek | 19.4 cfs | Low | ±0 | 21 mi |
| Goldsborough Creek above 7th Street at SheltonRiver gauge, Goldsborough Creek | 34.0 cfs | Very low | ±0 | 21 mi |
| Skookumchuck River near BucodaRiver gauge, Skookumchuck River | 203.70 ft | Below flood stage | +0.01 ft | 22 mi |
Questions and answers
Is the Chehalis River at Porter higher than last year?
Yes, it is 0.25 ft higher than on the same day last year, when the reading was 30.33 ft.
What is flood stage for the Chehalis River at Porter?
The official flood stage is 48.00 ft. The level is currently 17.42 ft below it.
What is a normal level for the Chehalis River at Porter in mid-October?
The median for mid-October is 4.74 ft. In 8 years out of 10 the reading falls between 3.19 ft and 30.86 ft, based on 35 years of records.
Is gage height the same as water depth?
No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.
What is the water level of Chehalis River at Porter today?
On Oct 17, 2026, 02:45 PM PDT, the water level was 30.58 ft. Steady over the last 24 hours.
Is Chehalis River at Porter rising or falling?
Steady over the last 24 hours. Steady over the last 7 days.
Is the level of Chehalis River at Porter normal?
High for mid-October. Compared with 35 years of daily readings for this time of year.
For specialists
Station codes, datum, parameters, data quality and downloads
- Operator
- U.S. Geological Survey
- Station code
usgs:12031000(Agency page)- Coordinates
46.93926, -123.31432(WGS84)- Vertical datum
- NAVD88
- Update interval
- every 15 minutes
- Licence
- Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision
Published series
| Parameter | Last value | Time (UTC) | Quality |
|---|---|---|---|
| Water level | 30.58 ft | 2026-10-17 21:45 | Provisional |
| Flow | 350 cfs | 2026-10-17 21:45 | Provisional |
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How to cite
U.S. Geological Survey: Chehalis River at Porter (usgs:12031000). Accessed October 17, 2026 via Nivelmap, https://nivelmap.com/en/united-states/washington/chehalis-river-at-porter
How we check values
Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.
Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer