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Pastimes : Severe Weather and the Economic Impact
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To: Benny-Rubin who wrote (7025)3/10/2025 3:54:31 PM
From: LoneClone  Read Replies (1) of 7186
 
There has been a similar change in the atmospheric rivers that hit BC. Back when we used to call them Pineapple Expresses, they always came with above normal temperatures, but this is changing.

For instance, the latest one this past weekend dropped anywhere between 75m and 200mm of rain at lower elevations, but it was cold enough that the precip came down as snow at higher elevations, which helps with the snow pack. This never used to happen; indeed sudden melting of the snow pack caused by warm air associated with atmospheric rivers used to be a big part of the flooding they caused.

Mind you, this could just be a side effect of being in La Nina, which always delivers colder temperatures to southern BC. We'll see what happens when El Nino returns.

One unfortunate aspect of these atmospheric rivers is that because they drop all the precip in one area rather than carrying on east like normal systems, eastern BC and Alberta no longer get any of the much-needed rain or snow.

LC
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