A rainfall warning bringing 50 to 100 millimetres of rain continues to be in effect for Ottawa and eastern Ontario this Friday, as the remnants of Deby arrive.
Environment Canada says on its website “a low pressure system interacting with the remnants of Tropical Storm Debby is expected to give heavy rainfall for eastern Ontario” Friday.
Residents are asked to familiarize themselves with information about flooding by consulting their local Conservation Authority or Ontario Ministry of Natural Resources and Forestry by visiting the following website: Ontario.ca/floods.
Tropical Storm Debby continued to swirl over Georgia and Carolinas on Wednesday. Some coastal cities have received more than 30 cm of rain.
“Even without Debby, the system would’ve brought us some rain tomorrow,” David Phillips, senior climatologist for Environment Canada, told CTV News Ottawa Thursday.
“But now with the abundance of precipitation or moisture from Debby, we’re going to see significant rain.”
Phillips says Friday’s heavy downpours could be record-breaking.
The current record for most rain on Aug. 9 is 41.4 mm, set in 1959.
“Ottawa is used to tornadoes, but we don’t often see remnants of hurricanes in the Ottawa area,” Phillips added.
The weather agency is expecting the rain to taper off later this evening.
Weather forecast
A high of 22 C, heavy rain and a risk of thunderstorm are in the forecast for Friday in Ottawa. The capital is expected to receive 50 to 70 mm of rain today. The rain is expected to end after midnight – risk of a thunderstorm this evening and after midnight. A low of 15 C and 5 to 10 mm of rain are in the forecast for the night.
A high of 25 C and a 30 per cent chance of rain are in the forecast for Saturday. Clear skies and a low of 13 C are forecasted for the night.
A high of 21 C and a 40 per cent chance of showers are forecasted for Sunday. A low of 14 C and a 40 per cent chance of showers are forecasted for the night.
The average temperatures for this time of year are a high of 25.8 C and a low of 14.9 C. The average monthly frequency of precipitation for August is 35 per cent.