Expectations become reality with the current hefty eastern low.

YOW sets a new daily record for the 5th of May with 40.4mm, crushing the previous benchmark of 24.6mm in 1985. Total monthly rainfall is now 90mm vs an average value of 80.1mm and that’s with less than a week in the rear-view.

As of today’s 5 AM update rainfall warnings and SWS remain in place for a swath of E ON into QC and also farther east through the Maritimes.

Daily records were also broken at YHM (21.6mm vs 2003’s 21mm), YYZ (22.2mm vs 2003’s 21.4mm) and YUL (22mm vs 1990’s 12.8mm). Monthly totals are now 74.8mm (vs 78.7mm total May average) at YHM, 62.8mm (74.3mm) at YYZ  and 59.6mm (81.2mm) at YUL.

The latest summary from EC:

Flooding woes have also affected parts of BC where landslides and evacuations have occurred.


For the Prairies, a burgeoning H5 ridge resulting from the omega block pattern in place over NA drove new daily high temp records.

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