Just saw that, here is what he wrote:
“For you Weather Geeks out there and sick twisted weather freaks yes I saw the 18z 3KM NAM -- I will be ignoring it completely.
Indeed if you take a look at the last four runs of 3km NAM model precipitation amounts at say Richmond for example you get this kind of variation 0z -0.91” 6z-0.51 “ 12z= 0.77” 18z = 0.45.
This kind of up and down back and forth with the precipitation amounts in the short Range models are common and it also exists in the GFS Euro and 12km NAM models just to name a few. It is one of those things you have to deal with as a meteorologist. I have absolutely no doubt that when the 0z NAM comes out at 9:00 p.m. it will have increased the moisture in all areas of Central and Eastern Virginia once again.”