My quip is that the recent August 17th rainstorm was the second 100-year storm in the last month, and that one in mid-July was the third since 2013. The answer to what is a 100-year storm:
It’s hard to precisely define other than to say it’s so large there is a 1 per cent chance of it happening every year.
“It’s just a really big storm that happens very rarely,” he1 said, explaining that a 100 year storm is the equivalent of 115 mm of rainfall in 24 hours. “If you look at a very long-term set of rainfall records, you would see a storm that big happens about every 100 years. It involves rivers flooding over its banks, significant runoff on roads, streets and parking lots.”
toronto.com
According to weatherstats.ca, Toronto got 128.4mm of rain, which pushed the total accumulation for the year to 827.2mm.
The photograph below is from an unusual angle; one that is hard to get, unless you know how. And like the magician, I am sworn to secrecy, so I am unable to divulge my method. This picture is from under the surface of a puddle–shot through a puddle up into the sky–taken during the rainstorm. The craters and splashes are from the raindrops hitting the watery surface. The light area is the sky, the dark is the trees in our backyard.
- Don Goodyear, general manager of integrated watershed management at Lake Simcoe Region Conservation Authority ↩︎
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