Ban my account ffs!
snowguy716
Atlas Star
Posts: 22,632
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« on: June 21, 2013, 07:05:47 PM » |
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The historic flooding in Calgary has been caused by a persistent, slow moving upper level low to the south in Montana... so the main flow in Calgary has been out of the east... somewhat of a rare situation... but this upsloping flow out of the east causes warm, dense air to cool as it is forced up the eastern slope of the mountains. This creates rain clouds.
This persistent pattern since mid May has caused an unusually rainy pattern, especially on the normally drier east slopes of the Rockies. But while Calgary has been wet (just under 5" of rain in May and 5.5" in June so far), the heavier rains quickly flowing off the mountains is the main source of the flooding.
I hope people do heed the warnings and stay safe!
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