Watershed Conditions Statements

(WCS – R06/2024)April 15, 2024 – A Flood Outlook Statement is being issued for the Upper Rideau Valley Watershed. Since early April, two large weather systems have brought between 60 to 90 mm of precipitation across the Rideau Valley Watershed. The highest precipitation amounts (90 mm) fell across the Upper Rideau Valley Watershed near Bob’s and Christie Lakes and the Tay River. The weather forecast indicates another 10 to 15 mm of precipitation for the next week. The significant precipitation received since early April has resulted in increased water levels and flows in all waterways in the Rideau Valley Watershed.  Based on the…
Water Conditions Statement: Flood Outlook — Lower Ottawa River April 14, 2024 — A Flood Outlook Statement is being issued for areas along the Lower Ottawa River (Arnprior to Hawkesbury).  Based on a large weather system from Texas that brought 15 to 75 mm of precipitation over much of the Ottawa River basin between April 11 and 13, levels and flows along the Ottawa River have begun increasing due to spring runoff. Residents along the shores of the Lower Ottawa River should be aware that throughout the spring freshet period water levels can rise rapidly at times and cause minor flooding…
(WCS – R05/2024)April 3, 2024 – The Rideau Valley Conservation Authority is issuing a WATER SAFETY message for the entire Rideau Valley Watershed. A Colorado Low is expected to bring significant precipitation to the region, starting Wednesday, April 3 and lasting through Thursday, April 4. The precipitation will fall as a mix of snow and rain. Exact amounts are unknown, but up to 30 mm of rain and up to 20 cm of snow is possible. Currently, water levels and flows are generally low and soil moisture levels are also low across the Rideau Valley watershed. While significant flooding is not anticipated, water…
Water Conditions Statement: Water Safety — Lower Ottawa River March 18, 2024 — A Water Safety Statement is being issued for areas along the Lower Ottawa River (Arnprior to Hawkesbury). This winter has been characterised by unseasonably warm temperatures, below-average precipitation in many locations and several melt events. As of mid-March, the amount of water in the snowpack is well below average for this time of year across the Ottawa River watershed. The snow is essentially gone in the south-east portion of the basin and well below average elsewhere for this time of year. Environment Canada is forecasting cooler, more seasonable,…
(WCS – R04/2024)March 8, 2024 – The Rideau Valley Conservation Authority is issuing a WATER SAFETY message for the entire Rideau Valley Watershed. A low pressure system is expected to bring widespread rain to the region, with between 20mm and 40mm expected throughout Saturday and Sunday. Snow conditions in the Rideau Valley watershed are largely depleted, but flows and water levels remain elevated from recent melt and rainfall events.  While significant flooding is not anticipated at this time, water levels and flows in all waterways are expected to increase and may exceed their banks along smaller tributaries and streams. Residents in these regions…
(WCS – R03/2024)February 26, 2024 – Unseasonably warm temperatures combined with significant rainfall is expected to trigger a widespread melt across the Rideau Valley Watershed this week. Temperatures are expected to rise significantly on Tuesday, February 27 and last until Thursday, February 29, with daily highs exceeding 10°C. Widespread precipitation is also expected during this period, with forecasts estimating between 20 and 30 mm of rainfall. Although snow conditions are considered below normal for this time of year, the warm temperatures and added rain will trigger an accelerated melt. Beginning on Tuesday, water levels and flows are expected to increase in all…
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Rideau Valley Conservation Authority
3889 Rideau Valley Drive
Manotick, Ontario K4M 1A5

613-692-3571, 1-800-267-3504



Regular Hours: Monday to Friday, 8:30 a.m. to 4:30 p.m.

Member of: conservation ontario