Stalled system to keep eastern Ontario, Quebec soggy after record notched
More rainfall and thunderstorms are on the way for eastern Ontario and Quebec after Ottawa airport recorded its wettest month on record. The continued rain is courtesy of a stalled storm system
As the southern Ontario dries off, parts of eastern Ontario and Quebec will see more rainfall and thunderstorms on Wednesday.
A stalled, upper-level trough is helping to bring heavy rainfall this week. Some Central Canada locales could see 50-80+ mm of rainfall. As a result, Ottawa airport set a new record for its wettest month ever recorded (255.5 mm as of July 27).
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The most serious danger will be if storms frequently pass over the same locations, causing rainfall totals to rapidly rise. Localized flooding, low visibility and dangerous driving conditions are all conceivable.
More rainfall and storms on Wednesday
As a result of moisture from the Gulf of Mexico, torrential rain and localized flooding risks are forecast in parts of Central Canada for the next 24 to 48 hours.
Showers and heavy rainfall may continue into Wednesday and Thursday, with an increasing chance of lingering, light precipitation during the latter.
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Thunderstorms will also be possible again. Severe storms will remain east of the low in a south to north direction. Flooding will remain a concern for the Laurentians and Ottawa Valley.
With the rainfall that has fallen in Ottawa so far this month, its airport has officially documented its wettest month ever since records began in 1938. The airport has so far recorded 255.5 mm of rain as of the afternoon of July 27.
Its previous record for its wettest month was July 2017, with 249.8 mm of rainfall observed.
Conditions will gradually improve Thursday into Friday but more rain is possible on the August long weekend, so plan accordingly.
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