Spring is on the way, daffodils and tulips are sprouting and with spring comes that winter change over of coat. Shedding is enivetable, with shedding come matting unless you are very diligent at brushing. but when it rains, we tend to be less attentive to wet hair and that can cause matting too.
It's not the heat of warming days that triggers a coat to "blow" or shed (change from winter to summer coat) it's the amount of light. when we have more sunny days than overcast days, that is what trigger that coat to "blow".
Most dogs shed in a mosaic pattern, the coat just don't loosen over night, but in patches, over several weeks. Yes a hot bath will trigger almost loose hair to loosen and shed all over the house. Your groomer did brush out your doing, but that got bath did it's job and what would have taken maybe two weeks to loosen is now coming out all over the house!
the Shed-Less process helps to loosen and pull dead coat from your pet's coat, better then just brushing. the conditioners along with a jet rinse actually removes 60% to 80% of coat that brushing can miss. Ask your groomer about any kind of a de-shed process, which involve several steps. I prefer the Shed-Less, but there are others.
When you can pluck coat from your pet in several places it's time for a professional shed-less process, contact your groomer.