In article <mn.c5837dd66f4a78ad.127094@snitoo>,
Snidely <
snide...@gmail.com> wrote:
> On Saturday, bill van pointed out:
>
> > It was a low pressure system that, because of unusual atmospheric
> > conditions, got stuck in one place over the eastern slopes of the
> > Rockies, including and especially the Kananaskis range southeast of
> > Banff.
>
> Was this perhaps because it was pinned in place by the Jet Stream? I
> should, of course, go look at the information myself, but I won't get
> to that tonight, and I haven't been following TWC or much reportage
> outside of AFCA.
>
> If there is a Jet Stream connection, then that could be tied to Global
> Warming, because the warming of the Arctic lets the Jet Stream wander
> more, which plays into extreme weather events (including,
> un-intuitively, bring the late cold weather from the Arctic to Mary's
> house).
>
> /dps "well, my intuition needed some help with that"
Verrry interesting.
From the Edmonton Journal, as published in the Calgary Herald on
Saturday:
EDMONTON - A massive high pressure system held in place by a loop in the
jet stream is what's behind both the Calgary floods and balmy
temperatures in the Yukon.
"It doesn't let systems through," said Chris Scott, chief meteorologist
at the Weather Network. He watched as what would otherwise be just a
simple spring storm got stuck west of Calgary.
The weather system came over the mountains from the Pacific. As it spun
and stalled over the foothills, it pulled in moisture from Saskatchewan,
the United States and the Gulf of Mexico. Starting Wednesday around
suppertime, it poured for 15 to 18 hours straight across most of
southwest Alberta.
"It was like this firehose of moisture," Scott said. "(The weather
system) just kept slamming this moisture into the mountains."
One spot at the Three Sisters Dam in Kananaskis got 220 millimetres of
water in 36 hours, which is "nearly half of the total annual
precipitation for that area."
(bill: that's 8.7 inches.)
Many areas got as much rain in 18 hours as they normally get in two
months. Locations from Waterton Lakes National Park north were measuring
near 100 mm, and some got as high as 120 or 150 mm. Bow Valley, west of
Calgary on Highway 1, got 165 mm.
Good question, Snidely.
If I was still in the news biz, I might be able to turn that into a
national and international story, assuming a few more people with the
right credentials corroborated and/or talked sense about this story.
I see that David Suzuki, arguably Canada's leading environmentalist, has
blogged on it for the Huffington Post:
<
http://www.huffingtonpost.ca/david-suzuki/alberta-flood-climate-change_b
_3480005.html>
http://tinyurl.com/mfuzgqy
But his bottom line appears to be the old climate change disclaimer: The
theory of climate change predicts more frequent severe weather events.
But you can't pin any given weather event on climate change with any
certainty.
It hasn't blossomed into a national/international story, at least not
yet.
Still, a really interesting angle.
bill