Superstorm Sandy: Down but not fully out

Superstorm Sandy will go down in history. But the storm itself isn't "history" yet.

It may no longer be packing a punch, but it is getting some jabs in.

"The combination of the remnants of Sandy and high pressure to the west are still producing strong winds over the Great Lakes and parts of the Northeast," says CNN meteorologist Dave Hennen. "This will cause some coastal flooding along the Great Lakes."

The Coast Guard in Milwaukee warned people to stay away from Lake Michigan on Wednesday, with 14- to 18-foot waves expected, according to CNN affiliate WTMJ-TV.

"It's a once in a lifetime to see something like this," Chris Barlow in Sheboygan, Wisconsin, told CNN affiliate WLUK-TV while watching the waves of Lake Michigan.

"This is pretty crazy. Earlier I saw a big wave go over that little red lighthouse," Theresa Kuczynski told the station.

Sandy's heavy rains are also causing floodwaters to gush through the Potomac.

And 2 to 4 inches of additional snow is expected in West Virginia, Maryland and southwestern Pennsylvania -- so travel hazards remain.

Much of Maine is under a flood watch until midafternoon Wednesday, though the National Weather Service says large rivers and streams are expected to "remain within their banks."

Meanwhile, parts of Canada are in for a bit of a wallop.

"The remnants of Sandy, especially the upper-level circulation, will move over eastern Canada and will bring a combination of snow, gusty winds and rainfall to portions of eastern Ontario and Quebec," said CNN meteorologist Brandon Miller.

The Canadian government has issued warnings for heavy rain, wind and even storm surges.

Still, Sandy is now "just a shell of its former self," Hennen said.

It "will be talked about for generations" -- and expect a lot of books about it, he said.

"The sun is even shining this morning in parts of the hardest-hit areas," Hennen said. "The story now is the devastation left behind."