The euro was terrible at a 7+ day lead time for this period, but did catch on more quickly than the GFS that we would be stuck in an unsettled period with a lot of clouds and a few showers rather than big heat.
The GFS and Euro are very close for 850 temps, but the euro insists that we are going to be cloudy and with scattered rain on Thurs/Fri, and that really holds the temps down.