From John Chambers:

 

Ice-out

I thought I was keeping a close eye
Each day inspecting thickness
Gauging the days until ice-out. 
Sixties some days, below 
Freezing some nights
Parcels of shoreline peel away
(Not our dock, mind you 
Shadowed by the elderly white pines)
But a three-inch crack appears
From the swim dock on the point
All the way to the island
And another, along the shoreline
Twenty feet out
Straight as a surveyor’s transit
Then torrents of rain
Puddles atop the ice
A mist that holds the island aloft
Chased by bursts of sun
Our dock unlocks a bit
Though the sheet still grips the bay
Another week, I predict
Only to wake surprised
By ripples from the north
By lapping water
By ice-out.