Watershed Conditions Statements

March 29, 2019 – Since early March, we have experienced a very gradual snow melt with limited precipitation across much of the Rideau Valley Watershed.  In the lower Rideau Valley Watershed (North Grenville and Ottawa) and in the Tay Valley Watershed, there still remains above average snow pack which indicates a potential for above average flooding in low lying areas adjacent to any rivers, creeks or ditches. The current weather forecast indicates that it will remain cool (near freezing) for Saturday and Sunday with a mix of rain, freezing rain, and snow on Saturday.  However, there is uncertainty about how…
March 19, 2019 – Despite some gradual snow melting over the last two weeks, the snowpack throughout the Rideau Valley Watershed remains above average so there is still a potential for above average flooding this spring across the Rideau Valley Watershed, especially in low lying areas which have flooded in the past. However, the current weather forecast until end of March is indicating that daytime temperatures with single digit highs and below zero conditions at night with very little precipitation, so no significant flooding is anticipated in the next week or so.  This could change if the forecast changes (i.e.,…
March 6, 2019 – The winter of 2018-19 has been an old-fashioned winter with lots of snow (over 250 cm to-date) and no significant thaw events. As such, the snowpack throughout the Rideau Valley Watershed is well above average. Current conditions at several RVCA snow course sites are indicating near record water content amounts in the snow for this time of year, generally not seen since the late 1970s.  Based solely on the fact we have above average water content, there is a potential for above average flooding this spring across the Rideau Valley Watershed, especially in low lying areas…
January 21, 2019 — The current very cold weather and large snow storm yesterday is creating some localized ice jams which can cause significant fluctuations in water levels as ice builds and releases. More specifically, the RVCA has received reports of ice jams in the Tay River at Port Elmsley which is causing flooding of some residential properties. There may be other areas as well where ice jams have formed and are causing localized flooding, especially along the Tay River. Since ice jams can form anywhere that there is open water, it is difficult to predict where or when they can…
December 20, 2018 — A significant weather system is expected to cross through our area over the next two days. Environment and Climate Change Canada is forecasting up to 40 mm of rain starting tonight, Thursday, December 20 through Friday, December 21. The forecast calls for above freezing temperatures during the day on Friday. Water levels across the Rideau Valley watershed are generally normal to slightly below normal and the amount of snow cover is slightly below normal for this time of year. The forecasted heavy rain and warm air temperatures are expected to melt most of the snow on…
December 5, 2018 – This statement is to advise that the low water status in the Rideau River watershed is returned to “Normal” including the Kemptville Creek sub-watershed. Precipitation over the last month has brought stream flows up to historical averages throughout the Rideau watershed. Runoff from the rain and snowmelt caused levels to rise late in November. The impacts of low flows experienced throughout 2018, particularly in the Kemptville Creek subwatershed, will not be known until next spring. With inflows well below normal, fish and other inhabitants of the creek struggled to survive in the intermittent ponds left by the…
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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.

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