Whoa - look at the change in IR in the last 2 hours on Karl! Clearly defined eye visible on IR with very deep convection covering about 60% of the CDO.

Recon is maybe 20-30 minutes out of another eye pass, but UW-CMISS ADT Adjusted T number is up to 5.9, or in other words a storm capable of sustaining 115kt winds, or potentially a maximum strength of a minimal Category 4 storm. Note that this is the theoretical maximum strength, and it takes time for the winds to catch up with structural changes and pressure drops.

I would not be surprised if NHC issued a special advisory following the recon pass given how close to shore Karl is.