It’s not that the graphic or forecast is wrong, it just looks like what I think of when I think of summer. More humid closer to the ocean, storms and rains in the Appalachians from WV to NNE, sea-breezes, watch out for tropical threats on the Gulf Coast, a battle ground of WNW flow out of Canada and SSE flow out of the Atlantic basin, etc.
You could roll that map out any summer and it would be a good place to start... and with no numbers to judge it on its like the Farmers Almanac.
But then again, props to anyone who takes the time to put their thoughts out there like that...I certainly don’t so not sure I have much to stand on critiquing it.