A major atmospheric river introduced extreme rains completes to elements of Vancouver Island and the Lower Mainland this weekend break, inflicting roadway washouts and substantial flooding.
We’ll injury down the numbers proper right here, provide context, and unwind one of the substantial rains event contemplating that November 2021.
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Storm quantities to from Friday to Sunday early morning
Effingham forestry terminal on Vancouver Island tape-recorded over 300 mm of rains contemplating that Friday, emphasizing the extreme optimums from this efficient climatic river. Several areas noticed a month’s nicely value of rainfall in merely 2 days.
Here are a couple of of the exceptional whole quantities:
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Coquitlam (Burke Mountain): 266 mm
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Sheringham: 195 mm
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West Vancouver: 189 mm
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Port Melon (Howe Sound): 187 mm
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Vancouver Harbour: 173 mm
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Squamish: 153 mm
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White Rock: 116 mm
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Vancouver International Airport (YVR): 119 mm
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North Cowichan: 101 mm
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Port Alberni: 94 mm
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Victoria (University): 66 mm
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Comox: 42 mm
Daily quantities to:Oct 19
That notes the wettest day contemplating thatSept 18, 2004 (91.6 mm), and the second-wettest October day on doc (afterOct 16, 2003, with 85 mm).
November 2021 distinction
For extra context, enable’s distinction this event to the record-breaking rainfall of November 2021.
Most terminals on the South Coast tape-recorded larger rains all through the November 2021 event, moreover Burke Mountain and Vancouver Harbour, which noticed much more rainfall this time round. Severe flooding befell in places consisting of Coquitlam, West Vancouver, Surrey, and North Vancouver, with southwestern Vancouver Island moreover drastically influenced.
November 2021. (NASA)
This climatic river might need had a way more substantial affect on native places withinMetro Vancouver Vancouver International Airport (YVR) is almost definitely to tape rains portions slightly greater than all through the 2021 event. However, with rather a lot much less snowmelt this time round, because the event befell in a while within the interval, the flooding risks have been quite diminished.
A Category 4 climatic river is uncommon for this element of the shoreline, but it nonetheless fades in distinction to the Category 5 event in November 2021. It pressed nicely proper into the Interior and up the Sea- to-Sky passage.
Category 4 and 5 climatic rivers describe the best diploma of dampness transportation, steadily inflicting extreme rains and flooding.
That event moreover noticed rather a lot much less of a rain-shadow impression on southerly Vancouver Island and the Fraser Valley.
With knowledge from Tyler Hamilton, a meteorologist at The Weather Network.
