Ottawa sets new rainfall record, more on the way to southern Quebec
This July has officially been the wettest month Ottawa has experienced on record.
As southern Ontario dries off, Ottawa has officially just recorded its wettest month on record after slow-moving storms meandered through the region on Tuesday.
A stalled, upper-level trough helped to bring heavy rainfall across southern and eastern Ontario this week. As a result, Ottawa airport set a new record for its wettest month ever recorded (259.9 mm as of July 28), breaking its previous July 2017 record.
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Once again, the Ottawa and southern Quebec region may see another day of wet, stormy weather on Wednesday. As a result of moisture from the Gulf of Mexico, torrential rain and localized flooding risks are forecast in parts of southern Quebec.
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
Showers and heavy rainfall may continue into Wednesday and Thursday, with an increasing chance of lingering, light precipitation during the latter. While it will feel muggy outside, temperatures will actually be at or below seasonal.
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 259.9 mm of rain as of the afternoon of July 28.
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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 over Ontario's August long weekend, so plan accordingly.
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