Missinaibi River at Mattice
Water level and flow at gauge 04LJ001, Ontario. The flow is below normal for October (29% of the median). In the last 24 hours it has been falling.
Latest reading Oct 25, 11 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 106 years of monthly averages): 39.1 m³/s1,383 cfs – 123 m³/s4,335 cfs, median 71.8 m³/s2,536 cfs. Right now it is at 29% of the median.
May 12, 1979 · approved records 1959–2025 (HYDAT). Right now the flow is 1% of that record.
50% lower than on October 25, 2025 (41.4 m³/s1,462 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 105 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
Sunny. Wind west 30 km/h gusting to 50. High 19. UV index 2 or low.
Increasing cloudiness early this evening. Wind west 20 km/h becoming light this evening. Wind becoming northwest 30 gusting to 50 late this evening. Low minus 2.
Overcast. Wind northwest 20 km/h gusting to 40. High plus 2. Wind chill minus 8 in the morning. UV index 1 or low.
Clear. Low minus 9.
Forecast for Hearst (10 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Mattawishkwia RiverHearst · 29 km | 4.92 m16.14 ft | Normal |
| Kapuskasing RiverKapuskasing · 64 km | 4.57 m14.98 ft | Below normal |
| Nagagami RiverHighway No. 11 · 93 km | 1.38 m4.52 ft | Very low |
| Groundhog RiverFauquier · 95 km | 29.38 m96.38 ft | Below normal |
| Kenogami RiverMammamattawa · 120 km | 20.14 m66.06 ft | Very low |
| Missinaibi RiverBelow Waboose River · 137 km | 24.62 m80.78 ft | Below normal |
About this gauge
Station: 04LJ001 · Missinaibi River at Mattice
Location: 49.6111, -83.2678 · Ontario
Same river: Below Waboose River
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 Missinaibi River at Mattice today?
The latest reading (Oct 25, 11 AM, local standard time) is 0.33 m (1.09 ft) with a flow of 20.8 m³/s (735 cfs).
Is the Missinaibi River at Mattice high right now?
The flow is below normal for October (29% of the median).
Is the Missinaibi River rising or falling?
In the last 24 hours it has been falling.
What is the highest flow ever recorded on the Missinaibi River at Mattice?
1,790 m³/s (63,213 cfs) on May 12, 1979, the highest instantaneous flow in the approved records of the Water Survey of Canada (1959–2025). Events after 2025 are not yet in the approved archive.
How does the Missinaibi River at Mattice compare with a year ago?
The flow is 50% lower than on October 25, 2025 (41.4 m³/s (1,462 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 04LJ001 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.