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A dramatic 'faux-hurricane' just took over the Hudson Bay

Thursday, October 8th 2020, 4:15 pm - Check out the stacked low-pressure system spiralling over the Hudson Bay.

As meteorologists, we're continuously analyzing satellite imagery for any unique feature that might catch our eye.

On Thursday, thousands of kilometres north, a pronounced swirl danced across the waters of Hudson Bay. To an untrained eye, it's appearance suggests the presence of an arctic hurricane – but quite the contrary, this is a classic case of mistaken identity.

This vortex possesses more bark than bite, and it's a stacked upper low, a case where low-pressure uniformly aligns in the column of the atmosphere.

Vortex

Often, this can be a tell-tale sign a low is weakening. Moreover, it can be slow to move as stacked lows are often cut-off from the main upper-level flow.

This faux-hurricane will be tugged north by a dominant upper trough to the east, slowly weakening in the process.

Don't worry, it's nothing like the Polar Vortex, but that'll come in due time.

What is a vortex

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