Have to wait until 3:53 p.m. update which is considered top of the hour for some reason. The inter-hour observations can be off due to rounding and might not represent actual high for the day. Although many times the high temp is higher than all of the hourly observations for the day. No idea why.
Might be a rounding error still. They should reach it though since they were 1 degree warmer than yesterday at the 2:53 hourly measurement.
SEA’s all time record for 90+ degree days is 12 and today would be their tenth this Summer I believe.