What I should be doing with my bees

 Right now the overwintered colonies are on their spring time build up. Not a huge amount of work to do today. But pretty soon our workload will be increasing.
In the short term winter covers can still be on. We will have a warm day it looks like on Monday. But then it cools off a bit. I look at the extended forecast and I think by April 10th the winter covers could be removed.
 We should now be starting weekly inspections. We will be looking at food stores. If a hive has three frames of honey in the same box the bees are in, that should be enough food for easily two weeks. Usually a lift of the box will tell us by the weight of the box, if the hive needs to be fed or not.
 Pollen patties should be checked weekly to see if more are needed. Beekeepers need to stay on top of the pollen patties. We don't want the patties to run out before placing another one on the hive.
 On Monday it is supposed to be warm out. A hive could be knocked down and we can do some spring cleaning. When breaking down a colony in the spring, do not put a box up on end. If there is a breeze, the wind can whistle through the box. The brood may get chilled and die. So keep the brood boxes parallel to the ground. I usually turn my telescoping cover upside down and put a brood box across the wooden edges of the cover while I am working on the hive.  
  The bottom board may be full of debris, when the hive is broke down, bring a box out with you, clean of the bottom board into the debris box. The dead bees have a lot of nitrogen in their carcasses. Dumping them in the bee yard will give the weeds more energy to grow and may attract critters. Dump the debris away from the beeyard.
  Total food assessment can be done at this time. Each box can be judged for weight. A frame or two of honey can be moved to the box where the bees are if needed. But, don't give the bees too many frames of honey. The queen should have five or six of relatively empty frames to lay on. There will be some minor nectar flows going on before the dandelions bloom, so the bees will bring in some nectar. There will not be enough nectar coming in to sustain a strong colony. So watch the food stores. Feed syrup if needed, do not over feed.
 If the overwintered colony is strong a reversal could be done at this time. If the colony is weak, it maybe too early to reverse. A reversal will give the bees an opportunity to expand their brood nest.
Reverse like this:
On a three deep colony, boxes are numbered.
Existing              Reversed
1    top                      3 bottom
2    middle                1 top
3    bottom                2 middle
Two deep reversal is simple:
1                               2
2                               1
Keep a pollen patty on the box where the bees are, you can put a 1/2 a pollen patty on the top box after the reversal.
The winter cover can go back on for the short term.
Colonies are building, doing reversals and keeping pollen on will increase hive populations. This will bring give us a strong colony when we can do a divide. Divides usually happen in May, or when we have eight frames of brood and bees. 
 Last remark, beekeepers cannot do a walk away split reliably in MN or WI until early June. Drone populations are not large enough for proper mating until around June 10th.
 Trying to make your own queen in the month of May is usually a waste of good brood.