First Alert Weather In-Depth: Larry’s extratropical transition

ROCHESTER, N.Y. (WHEC) — When most people think of hurricanes they think of tropical weather, including humid conditions, strong winds and flooding rains.

But with Larry, we will be watching out for some winter weather to move into Greenland.

It’s going to go through a process known as extratropical transition. That’s when a tropical system becomes an extratropical area of low pressure.

This cold front will interact with Larry and this is going to turn it from a tropical system into an extratropical low, which will expand the wind field.

The wind gusts aren’t going to increase but the wind size will expand, kind of what Hurricane Sandy did in 2012, and bring larger impacts to areas in Greenland. With the cold air in place, it’s going to bring snow, very heavy snowfall as we move through the weekend.

In terms of snow, some areas could see 1, 2, 3 and localized amounts near or more than 4 feet of snow. Not directly due to Hurricane

Larry, but the tropical moisture will help bring some of that snowfall.

Larry is also going to expand the wind field along with this area of low pressure as we go into Saturday.