Warmer Temperatures and Rain in Forecast – Caution Advised around Watercourses
Watershed Conditions Statement: Water Safety
Issued January 24, 2024 at 12:00 pm; Valid until January 29, 2024
The Upper Thames River basin is forecast to receive 15-25 mm of rain between Wednesday afternoon and Thursday evening, along with above freezing temperatures that will persist overnight. Snow surveys and gauges indicate 20-40 mm of water equivalent in the snowpack, with less in the eastern portion of the watershed.
The combination of rain and positive temperatures will begin to melt the snowpack and generate runoff, with peak flows expected to develop late Thursday night in upstream areas (Mitchell, Stratford, Woodstock), and into Friday morning downstream in London. The volume of runoff will depend largely on the temperatures and rain received; if warmer temperatures and more rain is received, runoff volumes will be higher.
The UTRCA does not expect serious flooding at this time, but water may spill over the banks in areas known to traditionally flood in the spring. Water levels will remain elevated over the weekend and into next week.
The public is reminded to exercise extreme caution and stay off all frozen water bodies. Any ice cover will be weakened and unstable. Flood control reservoirs will be especially hazardous due to fluctuating water levels. Banks adjacent to rivers and creeks are very slippery and, when combined with cold, fast-moving water, pose a serious hazard.
Parents and guardians are reminded to keep children and pets away from all watercourses and off frozen water bodies. Do not attempt to drive through flooded roadways. It is not safe to take shelter along riverbanks or in low lying areas that are prone to flooding.
The UTRCA’s flood control reservoirs at Fanshawe, Wildwood, and Pittock Conservation Areas will be operated to reduce downstream flooding. UTRCA officials are monitoring the situation and will report on any changing conditions if necessary.