Grey Sauble Issues Flood Outlook as Warm Temperatures and Rain Approach
A flood outlook from Grey Sauble Conservation Authority warns warmer temperatures and rain may lead to higher streamflows and flooding in low-lying areas.
The Grey Sauble Conservation Authority (GSCA) is warning that a combination of warm temperatures and rain later this week could lead to increased runoff and seasonal flooding in low-lying areas across the watershed.
In a watershed conditions statement issued Wednesday afternoon, GSCA said temperatures are expected to rise above 10°C on Friday and Saturday, with forecasts calling for between 10 and 40 millimetres of rain beginning late Friday and continuing through much of Saturday.
Recent snow surveys show the remaining snowpack still contains a measurable amount of water. In the southern part of the watershed, the snowpack holds about 10 to 15 millimetres of water equivalent, while areas on the Bruce Peninsula contain between 20 and 30 millimetres.
The snow has become dense and saturated after recent mild weather, meaning it is ready to release water as temperatures rise.
As rain falls and the snow begins to melt, the ground beneath the snow is expected to become saturated. That could cause additional runoff into ditches, streams and rivers throughout the region.
GSCA says water levels in local watercourses may rise and some rivers and streams could reach or exceed their banks. Seasonal flooding of low-lying areas is possible, although major flooding is not expected at this time.
The authority says the risk of ice jams currently appears to be low, but localized issues could still occur as rising water levels break up remaining ice cover.
Residents are being reminded that high water conditions can create dangerous situations near rivers and streams. Fast-moving water, unstable or slippery banks and melting ice can all pose safety risks.
GSCA says staff will continue monitoring weather forecasts, stream flows and water levels and will issue additional updates if conditions change.
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