Chehalis River at Harrison Mills
Water level and flow at gauge 08MG001, British Columbia. The flow is well below normal for October (14% of the median). In the last 24 hours it has been rising.
Latest reading Oct 25, 4 AM local standard time (2 hours ago) · data checked · we check every 30 minutes
Compared with a normal October
Normal for October (middle half of 48 years of monthly averages): 18.8 m³/s664 cfs – 50.8 m³/s1,792 cfs, median 32.9 m³/s1,162 cfs. Right now it is at 14% of the median.
October 16, 2003 · approved records 1985–2025 (HYDAT). Right now the flow is 1% of that record.
93% lower than on October 25, 2025 (68.6 m³/s2,423 cfs)
approved daily mean (HYDAT)
Last 30 days
Hourly readings · shaded: normal range for this month
This year compared with past years
Daily flow
Normal range: monthly averages of 48 years (lighter band: 10th–90th percentile). Past years: approved daily means from HYDAT, the Water Survey of Canada archive (the latest year published is 2025). 2026: daily means of the provisional real-time readings collected by Canada River Levels since October 22, 2026.
Weather near this gauge
Periods of rain ending this morning then mainly cloudy with 40 percent chance of showers. Wind northeast 30 km/h gusting to 50. High 12. UV index 1 or low.
Mainly cloudy. 30 percent chance of showers this evening. Wind northeast 20 km/h gusting to 40. Low 7.
Mainly cloudy. Wind becoming southwest 20 km/h in the afternoon. High 13. UV index 1 or low.
Cloudy. Low 6.
Forecast for Agassiz (14 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Harrison RiverBelow Morris Creek · 3 km | 8.69 m28.51 ft | Very low |
| Harrison RiverHarrison Mills · 7 km | 6.24 m20.48 ft | Above normal |
| Harrison RiverHarrison Hot Springs · 8 km | — | Very low |
| Harrison LakeHarrison Hot Springs · 12 km | 8.84 m29.00 ft | Very low |
| Chilliwack RiverVedder Crossing · 23 km | 1.39 m4.55 ft | Very low |
| Chilliwack RiverAbove Slesse Creek · 30 km | 0.37 m1.21 ft | Very low |
About this gauge
Station: 08MG001 · Chehalis River Near Harrison Mills
Location: 49.3000, -121.9378 · British Columbia
Water levels are measured from a local reference point at each gauge, not from sea level, so they cannot be compared between gauges.
Official sources
For flood warnings, advisories and approved data, always use these official services:
Questions
What is the water level of the Chehalis River at Harrison Mills today?
The latest reading (Oct 25, 4 AM, local standard time) is 8.87 m (29.08 ft) with a flow of 4.63 m³/s (164 cfs).
Is the Chehalis River at Harrison Mills high right now?
The flow is well below normal for October (14% of the median).
Is the Chehalis River rising or falling?
In the last 24 hours it has been rising.
What is the highest flow ever recorded on the Chehalis River at Harrison Mills?
909 m³/s (32,101 cfs) on October 16, 2003, the highest instantaneous flow in the approved records of the Water Survey of Canada (1985–2025). Events after 2025 are not yet in the approved archive.
How does the Chehalis River at Harrison Mills compare with a year ago?
The flow is 93% lower than on October 25, 2025 (68.6 m³/s (2,423 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 08MG001 of the Water Survey of Canada (Environment and Climate Change Canada). Real-time data are provisional and may be revised. We check for new readings every 30 minutes. Canada River Levels is not an official source.