I used to be pretty squeamish about opening the hive under the magic temperature of 60 degrees.
Then one spring I made it back to a remote bee yard and I found one hive with the top totally blown off--the top, the inner cover and two masonry bricks placed to keep the lid on.
The hive survived just fine. The bees were clustered about 1/2" under the top bars, and needless to say, I put the top back on! I had no idea how long they were exposed.
I've been out the past two days doing the Mountain Camp method. The highs barely reached 39 degrees, but previous inspections showed lower than expected stores and warm temperatures earlier this fall seemed to accelerate the consumption.
I figured I really had no choice as we are gearing up for our first round of snow, with falling temperatures. I merely popped the lid, added a shim, tucked in a sheet of newspaper and added about ten pounds of dry sugar.
Grant
Jackson, MO