Whitson River at Chelmsford
Water level and flow at gauge 02CF007, Ontario. The flow is below normal for October (53% of the median). In the last 24 hours it has been steady.
Latest reading Oct 25, 9 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 66 years of monthly averages): 1.28 m³/s45.3 cfs – 3.00 m³/s106 cfs, median 1.91 m³/s67.6 cfs. Right now it is at 53% of the median.
April 23, 1985 · approved records 1962–2025 (HYDAT). Right now the flow is 1% of that record.
60% lower than on October 25, 2025 (2.55 m³/s90.1 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 65 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
Cloudy with 40 percent chance of showers. Wind southwest 20 km/h gusting to 40. High 16. UV index 3 or moderate.
Cloudy with 40 percent chance of showers this evening. Clearing late this evening. Wind southwest 20 km/h becoming light this evening. Low plus 4.
A mix of sun and cloud. Wind becoming north 20 km/h in the morning. High 8. UV index 3 or moderate.
Clear. Low minus 7.
Forecast for Sudbury (Greater) (2 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Whitson RiverVal Caron · 13 km | 7.32 m24.03 ft | Normal |
| Onaping RiverLevack · 14 km | 1.09 m3.58 ft | Below normal |
| Moose CreekLevack · 16 km | 1.05 m3.43 ft | Normal |
| Vermilion RiverVal Caron · 18 km | 2.84 m9.31 ft | Below normal |
| Junction CreekSudbury · 19 km | 0.93 m3.04 ft | Normal |
| Junction CreekBelow Kelley Lake · 19 km | 2.74 m8.99 ft | Normal |
About this gauge
Station: 02CF007 · Whitson River at Chelmsford
Location: 46.5834, -81.1991 · Ontario
Same river: Val Caron
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 Whitson River at Chelmsford today?
The latest reading (Oct 25, 9 AM, local standard time) is 8.73 m (28.65 ft) with a flow of 1.01 m³/s (35.7 cfs).
Is the Whitson River at Chelmsford high right now?
The flow is below normal for October (53% of the median).
Is the Whitson River rising or falling?
In the last 24 hours it has been steady.
What is the highest flow ever recorded on the Whitson River at Chelmsford?
91.8 m³/s (3,242 cfs) on April 23, 1985, the highest instantaneous flow in the approved records of the Water Survey of Canada (1962–2025). Events after 2025 are not yet in the approved archive.
How does the Whitson River at Chelmsford compare with a year ago?
The flow is 60% lower than on October 25, 2025 (2.55 m³/s (90.1 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 02CF007 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.