Massy Reservoir
Higher than usualWater level is higher than usual for mid-September and holding steady.
This is a controlled waterbody (reservoir or regulated lake). Water levels may be managed by dam operations and may not follow natural seasonal patterns.
Low (24.77m)Normal rangeHigh (28.90m)
Current Weather
2d ago18°C
Wind SE 21 km/h
Humidity 56%
Sunny
Environment Canada — Cypress Hills Provincial Park - Foremost
vs. Last Year
No data available
7-Day Trend
→Stable
Changed less than 2.0 cm over the past week
-1.4 cm over 7 days
Seasonal Position
86th percentile
Based on 38 years of records
Seasonal Outlook
Typical next 7 days
This lake usually drops slightly over the next week.
Typical next 14 days
Over two weeks, levels typically drops moderately.
Tracking
This year is tracking near the seasonal norm.
Based on 29 years of seasonal patterns. Moderate historical coverage. This is a historical seasonal pattern, not a forecast.
Water Level — Last 30 Days
Technical details
- Current level
- 28.10 m
- Reference value
- 28.10 m (rolling_6h_mean)
- Percentile for date
- 86th percentile
- Years of record
- 38
- Source station
- MASSY RESERVOIR NEAR ELKWATER (11AB104)
- Est. average depth
- —
- Relationship type
- controlled_system
- Mapping confidence
- medium
- Today's normal range
- 26.72–27.84 m
- Same-date historical range
- 24.77–28.90 m
- 30-day change
- -6.8 cm
- Data confidence
- medium
- Observed at
- Sep 20, 2026
- Last snapshot
- Sep 20, 2026
Data source: ECCC Water Office — Station 11AB104. Water level readings are provisional and subject to revision. This is not a navigation or flood-warning service.