Snow may be pretty and all, but it's still just frozen water. If the temps warm up and that snow starts melting, you could end up with a flooded basement—a double whammy if the power goes out too, taking your sump pump with it. A battery backup sump pump is your basement's best friend because it's there all the time, especially when you lose power and need it the most.
Basement Watchdog Emergency Battery Backup Sump Pump,
about $150 homedepot.com