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Main Office Phone Numbers : 613-692-3571 / 1-800-267-3504
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May 1, 2019 — Rideau Valley Conservation Authority (RVCA), in conjunction with the Mississippi Valley Conservation Authority (MVCA) and South Nation Conservation (SNC) is maintaining the FLOOD WARNING issued on April 19, 2019 for the areas under our jurisdiction along the Ottawa River. The most recent model outputs from the Ottawa River Regulation Committee (ORRC) indicate that water levels have peaked on Lac Coulonge. From Chats Lake down to Hawkesbury/Grenville, levels have stabilized but are expected to increase due to forecasted rain of 15 to 35 mm on a large part of the basin starting today. All flood-prone areas along the…
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Watershed Conditions Statements
April 29, 2019 — Rideau Valley Conservation Authority (RVCA), in conjunction with the Mississippi Valley Conservation Authority (MVCA) and South Nation Conservation (SNC) is maintaining the FLOOD WARNING issued on April 19, 2019 for the areas under our jurisdiction along the Ottawa River. The most recent model outputs from the Ottawa River Regulation Committee (ORRC) indicate that runoff from snowmelt and precipitation is decreasing from Mattawa to Lac Coulonge with levels stabilizing in Mattawa and Pembroke. The Lower Ottawa River water levels are increasing due to upstream spring runoff caused by rainfall, saturated soil and snowmelt over the central part of…
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Watershed Conditions Statements
May 7 , 2019 — Rideau Valley Conservation Authority (RVCA), in conjunction with the Mississippi Valley Conservation Authority (MVCA) and South Nation Conservation (SNC) is maintaining the FLOOD WARNING issued on April 19, 2019 for the areas under our jurisdiction along the Ottawa River. The current weather forecast indicates that significant rainfall amounts are possible from Thursday morning into Friday as a large low-pressure system moves into the area. The most recent analysis from the Ottawa River Regulation Committee (ORRC) indicate that water levels along the Ottawa River from Chats Lake down to Lac Deschenes are stable and may increase…
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Watershed Conditions Statements
August 15, 2019
Minor Low Water Conditions in Rideau Valley Watershed
August 15, 2019 — As the warm, dry weather continues, conditions in the Rideau Valley Watershed now meet the threshold for Minor Low Water status under the Ontario Low Water Response Program. Watershed residents and businesses are encouraged to conserve water during dry conditions. After a cool and wet spring with very significant flooding in some areas, July and August have been mostly warm and dry across the Rideau Valley watershed, with some localized rainfall in early August. The average 90-day rainfall measured at climate stations in and around the watershed is just shy of 80 per cent of normal…
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Watershed Conditions Statements
January 10, 2020
Forecasted Precipitation May Increase Water Levels and Flows and Cause Unstable Ice Throughout Rideau Watershed
January 10, 2020 – Environment Canada is forecasting significant precipitation in the form of rain or drizzle, freezing rain, ice pellets and snow starting Friday and continuing into Sunday with the greatest precipitation amounts on Saturday. There remains a considerable amount of uncertainty on exact precipitation amounts and what form it will take, however, rainfall amounts of between 50 and 75 mm are possible throughout the Rideau Valley watershed. Although no significant flooding is anticipated, water levels and flows are expected to increase in all waterways in the Rideau Valley Watershed. Depending on how much rain falls, residents who are…
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Watershed Conditions Statements
January 14, 2020
Record Rain Causes High Water Levels, Fast Flows, and Unstable Ice Throughout Rideau Watershed
January 14, 2020 – With high water levels and fast flows all across the Rideau Valley Watershed, the ice cover (where present) on lakes, ditches, local streams and rivers will be unstable. Extreme caution should be exercised by everyone when near local waterbodies. Parents should inform their children of the risks and provide appropriate supervision. On average, 50mm of rain fell across the Rideau Valley Watershed last Saturday before the temperature dropped to below freezing, resulting in significantly elevated water levels and flows in all waterways. The smaller creeks and waterways were impacted the most with ‘bankfull’ conditions observed in…
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Watershed Conditions Statements
March 09, 2020
Flood Outlook: Current Spring Conditions Favourable for Slow Snow Melt Across the Rideau Valley Watershed
March 9, 2020 (WCS – R03/2020) — The winter of 2019-20 has been warmer than average with near-average snowfall amounts. On January 11, about 50 mm of rain fell across the Rideau Valley Watershed, resulting in temporarily elevated water levels and flows in all waterways, and a noticeable ice layer within the snowpack. Current conditions at several RVCA and Parks Canada snow course sites are indicating above average water content amounts in the snow for this time of year. The current short-term forecast indicates daytime high temperatures above zero and below zero conditions at night with precipitation expected tomorrow (up to 15…
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Watershed Conditions Statements
March 10, 2020
Flood Watch - Water Levels Rising on Stevens Creek and Taylor Drain in the Village North Gower
(WCS – NG01/2020) March 10, 2020 – The mild weather yesterday and today has melted a significant amount of snow in the Rideau Valley Watershed. This snow melt together with some rainfall is causing the water levels to rise quickly in Stevens Creek and Taylor Drain. Based on new water level gauges installed in the spring of 2019, it appears that the water may breach the banks and cause localized flooding within the low-lying areas along Stevens Creek and Taylor Drain in the Village of North Gower. The timing of the potential breach will depend on the temperatures and rainfall…
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Watershed Conditions Statements
January 13, 2021
Mild Winter Causing Unstable Ice Throughout Rideau Watershed
WCS – R01/2021) January 13, 2021 – Environment Canada is forecasting mild temperatures for the remainder of this week, with daily temperatures above zero each day and some rain expected on Friday and Saturday. This follows a warmer than usual December and a mild January to date. As a result of a significant rain event on December 24 and 25, water levels are above normal for this time of year in the some of the lakes and rivers in the Rideau Lakes and Tay Valley sub-watersheds. Generally, water levels are at normal levels for the remainder of the watershed. Although…
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Watershed Conditions Statements
January 29, 2021
Cold Weather this weekend could cause localized frazil ice formation and flooding in Rideau Valley Watershed
WCS - R02/2021 January 29, 2021 – Environment Canada is forecasting very cold weather beginning today and continuing into Sunday before returning to normal range on Monday. This includes night-time wind chill temperatures in the range of -20 to -30 degrees Celsius. In areas where there is a lack of ice cover along with turbulent flow, these cold temperatures can trigger the formation of frazil ice which can accumulate quickly on bridge abutments, piers and riverbanks resulting in increased water levels and flooding in low-lying areas. The small rivers and streams with open water, such as the Tay River, are…
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Watershed Conditions Statements
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March 08, 2021
Spring Outlook: Early Snow Melt and Rising Water Levels Expected Across the Rideau Valley Watershed
WCS – R03/2021 March 8, 2021 –The winter of 2020-21 is quickly coming to an end. After a mild start, February brought cooler temperatures. The watershed saw a significant rain event in late December, followed by below normal precipitation in January and above normal precipitation in February. Current conditions recorded at several RVCA and Parks Canada snow course sites are indicating normal water content amounts in the snow for this time of year. In general, water levels on lakes and flows in the streams are presently below normal for this time of year. The current short-term weather forecast indicates a…
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Watershed Conditions Statements
March 25, 2021
Rain in Forecast Will Cause Water Levels to Increase Again Across the Rideau Valley Watershed
March 25, 2021 - Above normal temperatures in March have melted most of the snow across the Rideau Valley watershed. The snow melt was quite rapid at first causing water levels and flows to rise quickly in some areas. This was followed by a more gradual melt of the remaining snow. For the most part, water levels and flows are about normal for this time of year and are well below flood thresholds. The short-term forecast is calling for rainfall amounts of between 40 to 50 millimetres between Thursday and Sunday, with heaviest rain on Friday, and cooler temperatures…
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Watershed Conditions Statements
December 24, 2020
Forecasted Precipitation May Increase Water Levels and Flows and Cause Unstable Ice Throughout Rideau Watershed
(WCS – R07/2020) December 24, 2020 — Environment Canada is forecasting between 30 and 50 mm of rain starting today and continuing overnight throughout the Rideau Valley watershed. Although no significant flooding is anticipated, water levels and flows are expected to increase in all waterways in the Rideau Valley Watershed. Depending on how much rain falls, residents who are adjacent to the smaller creeks and streams are advised to keep a close watch on water levels and flows and should take the necessary precautions to protect their property, such as: Ensuring sump pump is clear, in good working condition and…
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Watershed Conditions Statements
March 27, 2020
Updated Flood Outlook & Flood Watch: Rideau Valley Watershed
Updated Flood Outlook & Flood Watch: Rain in Forecast Will Cause Water Levels to Increase Again Across the Rideau Valley Watershed (WCS – R05/2020) March 27, 2020 –The short-term forecast is calling for rainfall amounts of 35 millimetres or more on Sunday and into Monday with above zero temperatures. As such, water levels and flows across the Rideau Valley Watershed are expected to increase again. A FLOOD WATCH is being issued for properties around Christie Lake and Wolfe Lake. In these areas, residents should expect freshet like water levels and flows. Parks Canada staff are closely monitoring the water levels in…
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Watershed Conditions Statements
