YES! Once the snow has cleared and the lawn has dried out some, a light raking (with a PLASTIC leaf rake only) remove lingering fall leaves and grass blades that did not survive winter. Raking loosens matted grass clumps, which can smother new growth and helps with snow mold recovery. Too much dead, matted grass will prevent your lawn from breathing and taking in important nutrients as well. 

1. Rake and remove any debris or dead grass from the area.
2. Break up the soil. If soil seems hard, aeration first would be recommended prior to seeding.
3. Amend the soil if leveling is needed after removing dead grass.
4. Sprinkle grass seed evenly across the patch area, thick enough to cover the surface but not so thick that the seeds pile up on top of one another.
5. Lightly rake in the seed to distribute it evenly and sprinkle top soil to protect the seed.
6. Lightly water the area. Keep the seeds moist throughout the day as temperatures increase. 

Oftentimes, invasive grasses are mistaken as crabgrass (annual weed). But, there are actually quite a few other unwanted grasses that it could be (perennial weeds)— the vast majority are considered uncontrollable grasses (vs controllable) and will need to be killed out of the lawn with glyphosate (roundup).  They often appear as clumps, wider blades, faster growing, and lighter color than Kentuckyblue grasses.  Spray the plant with gyphosate and repeat as needed until dead.  Dig out the dead grass and repair with sod or by re-seeding the area.  Keep moist until rooted or seed start to sprout.