Publication: 2020-04-03 2:17 PM
This map includes markers representing the locations where the Ottawa River Regulating Committee provides hydrological forecasts to the public.
|Location||Type of value||Reading at 8:00 h||
|Ottawa River at Temiscaming Graph View||Flow (m3/s)||600||625||650||650|
|Ottawa River at Pembroke Graph View||Level (m)||112.00||112.03||112.08||112.09||112.1|
|Lake Coulonge at Fort-Coulonge Graph View||Level (m)||106.63||106.7||106.75||106.8||106.85|
|Chats Lake at Arnprior Graph View||Level (m)||74.42||74.45||74.5||74.55||74.6|
|Lake Deschenes at Britannia Graph View||Level (m)||59.08||59.1||59.15||59.22||59.25|
|Ottawa River at Carillon Graph View||Flow (m3/s)||4700||4700||4750||4700||4700|
River Conditions Forecast
Water levels and flows on the Ottawa River from Mattawa down to Lake Deschenes are expected to increase gradually over the next few days in response to the spring thaw. With part of the snow cover now gone in the south-eastern portion of the basin and no significant forecast rainfall, water levels and flows from Gatineau (Hull) down the Montreal Region are expected to be fairly stable over the next few days. Levels are expected to remain below flood thresholds and close to seasonal values in all locations. Some of the northern reservoirs are beginning to fill as snowmelt runoff begins in these areas.
Forecast Schedule and Frequency:
Forecasts will resume for the spring freshet of 2020.
During the spring freshet period, you may click on any marker to see additional information for this location and to access a Graph View of the data. Graph View is also accessible by clicking on any location in the table below.
- Level forecasts correspond to predicted level at midnight (24h).
- Discharge forecasts correspond to predicted average daily discharges for specified dates.
- Note that water levels are measured in metres above mean sea level.
If you think that your property may be at risk of flooding, please contact your municipality.
Please read the important warning at the bottom of the page.
- Hydrological forecasting is based on meteorological forecasting and is therefore subject to the same level of uncertainty. These data are provided for information purposes only.
- Except in unusual circumstances, the table is updated in the afternoon and only on business days. The updates therefore do not take into account any changes that have occurred during the day or between two business days.
- The flow rate and actual levels can change rapidly without warning, particularly during the freshet period. We advise those using bodies of water to exercise caution and to follow safety rules at all times.
- Users of flow data and water level data shown on this website are cautioned to consider the unverified nature of the information before using it for decisions making. Please see the Disclaimer for further details.
About this map
The coloured markers on this map depict conditions (level or flow) as a range of conditions categorized in three groups: for normal conditions, for above normal, for below normal. Click on any marker to see the most recent data from this location and what type of data is measured there. To view data related to the principal reservoirs in the basin, select ‘Reservoirs only’ in the upper right corner. Near real-time and historical data is available for additional locations by selecting ‘Graph View and Advanced Data’. Water levels at 24:00 means at midnight.
The data provided by this web service may not be reproduced or redistributed. Contact the Ottawa River Regulation Secretariat (see Contact us) for information on how to obtain historical data directly from the data owner.
Users of flow data and water level data shown on this website are cautioned to consider the unverified nature of the information before using it for decisions making. Please see the Disclaimer for further details.
The flow rate and actual levels can change rapidly without warning, particularly during the freshet period. We advise those using bodies of water to exercise caution and to follow safety rules at all times.
Understanding Range of Conditions:
The three ranges are based on percentiles, which are computed from the observations of the current day of the year over the last 30 years. The percentile (P) is the percent of all data that is lower than the actual value for the current day of the year.
: normal conditions, between P25% and P75%
: above normal conditions, P is equal or greater than P75%
: below normal conditions, P is lower than P25%