Watershed Conditions Statements

(WCS – R01/2023) January 12, 2023 – After gaining and losing a large amount of snow over the holiday season, the short-term forecast is calling for between 15 and 30 cm of snow starting Thursday, Jan. 12 through late Friday, Jan. 13. Elevated water levels/flows are now declining across most of the watershed after above-average temperatures and precipitation caused a spike at the end of December and early January. But water levels in the upper watershed reservoir lakes, specifically Bobs and Christie Lake, are above average and continue to increase. The conditions are being monitored closely by Parks Canada staff. A FLOOD…
(WCS – R10/2022) December 30, 2022 – The Rideau Valley Conservation Authority is extending the Water Safety Statement issued on December 21, 2022 due to a prolonged warming trend and forecasted rainfall over the next few days. Above zero temperatures are expected to continue late into next week, with forecasted rainfall of 20-30 mm through the weekend. These conditions will likely accelerate the release of the existing snowpack and will result in increased flows and water levels throughout the Rideau Valley watershed. With rising water levels expected over the next few days, ice cover on lakes, ditches, local streams, and…
(WCS – R09/2022) December 21, 2022 – Caution is advised as a major winter storm makes its way to the Rideau Valley this week. Environment Canada’s short-term weather forecast indicates precipitation will begin as rain or snow late Thursday, Dec. 22 before transitioning to rain on Friday. Rainfall amounts of up to 40 mm are forecasted for Friday before the temperature drops below zero. Falling temperatures will be accompanied by strong winds along with more snow. Water levels and flows are generally low to average for this time of year across the Rideau Valley Watershed. Although no significant flooding is anticipated,…
Water Conditions Statement: Flood Outlook — Lower Ottawa River April 27, 2022 —   The Flood Outlook Statement issued on April 14th is still in effect for areas along the Lower Ottawa River (Arnprior to Hawkesbury).   Water levels and flows on the main stem of the Ottawa River are expected to increase in most locations over the next few days in response to combined snowmelt from the northern part of the basin and recent rainfall. Levels are expected to be similar to those experienced about one week ago in most locations before starting to decline. Reservoirs throughout the basin are being…
Water Conditions Statement: Flood Outlook — Lower Ottawa River April 14, 2022 —  A Flood Outlook Statement is being issued for areas along the Lower Ottawa River (Arnprior to Hawkesbury). Based on forecasted precipitation and anticipated snow melt, levels and flows along the Ottawa River are expected to increase over the next few days as a result of the onset of the spring freshet in the Ottawa River basin. Snow cover varies significantly across the 146,300 km2 Ottawa River basin, with most southern areas having no snow cover at all. A large portion of snow cover in the northern regions…
(WCS – R08/2022) April 6, 2022 – The Rideau Valley Conservation Authority is continuing with a HIGH WATER SAFETY message for all areas. Although water levels and flows are now declining for most areas of the Rideau Valley Watershed, except for the lakes which are discussed below, the forecasted rain will cause water levels and flows to increase in the coming days. The short-term forecast indicates as much as 40 mm of rain may fall between Thursday, April 7 and Saturday, April 9. The snow has melted across the entire watershed. Although no significant flooding is anticipated, water levels and flows are expected…
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Rideau Valley Conservation Authority
3889 Rideau Valley Drive
Manotick, Ontario K4M 1A5

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



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