The Grand River watershed has expereinced high levels of rain, said the Grand River Conservation Authority.
The GRCA reported most of the climate stations in the watershed recorded a month’s worth of rain during the first week of May, and plenty of rain after that.
A slow-moving weather system May 3 to 5 delivered heavy rainfall to southern Ontario. Rain gauges recorded 60 to 75 mm of rain during this time.
The reservoirs reduced the peak flows by up to 30% directly downstream of the reservoirs and by about 20% in the central Grand River.
Water levels in the reservoirs are in the normal operating range, the authority reports.
