We’re having the same problem here in Pittsburgh. I’m not sure there’s anything you can do at the moment. But make sure you check the basement below the window that’s leaking, you may have more leaks there. Here’s what’s happening here: 1 There’s an ice dam on the roof, this is where snow melts on the roof, runs down to the gutter, and then re-freezes in the gutter making the gutters ineffective at removing water. You probably have icicles hanging off your gutters? If you do, you have an ice dam there. 2 The ice dam is holding water back on the roof. Roof systems are designed to stop water that’s running down them from leaking, but most are not really designed to stop pooled water from eventually leaking through 3 In our case, we have gutters that are integrated into the eaves of the roof (quite fashionable in 1920), and in at least two places, we have water leaking through the gutter into the wall and into the house that way. The solutions to these problems are: 1) Install roof heaters to melt the ice dams before the form (these are those zig-zag wires running just above gutters you see on some people’s houses), and/or insulate the roof better (keeps the roof surface cold and the snow doesn’t melt when it would refreeze in the gutter) 2) Install membrane roofing (which would prevent water sitting on the roof from seeping in)—this is pretty expensive and not really practical, but it would solve a problem. 3) Fix the gutters. We’re having a roofer come out as soon as the snow is gone, but there’s nothing you can do right now to fix the problem, other than sop up the water.