Quackgrass has rolled vernation and a short, membranous ligule. Lower sheaths are often hairy while upper sheaths are usually smooth. Leaves are an ashy, blue-green color and can sometimes have a longitudinal twist. One obvious characteristic of this grass is its system of underground stems, or rhizomes. I do not see any long white rhizomes in your pictures. If you roll the flower spikes between your fingers the quackgrass spikes will feel round. Quackgrass is most vulnerable just as the shoots are emerging, when sugar from the roots is being expended to promote new growth but the young leaves are not yet photosynthesizing at full capacity, so little sugar is being sent back to the roots.  Quackgrass has been shown to be allelopathic, which means it releases chemicals that inhibit the growth of other plants. Quackgrass has rolled vernation and a short, membranous ligule. http://purdueturftips.blogspot.com/2015/06/weed-of-month-for-june-2015-is.html

Quackgrass stands out in turf this time of year due to its rapid top growth. This is a one-time-of-year occurrence due to the top growth difference when quackgrass could be effectively killed with a non-selective herbicide such as glyphosate.  Carefully paint quackgrass leaves with herbicide.