looks like to me tammy may have made landfall... or is making landfall with the current center... in the last few hrs.. new storms fired up on the NE side of center...and that may have caused the center to be thrown around...... by looking at the vis shot and not jax radar... i think it would be less that 20 miles off the coast.... i think the 2pm had 20 miles northeast of Daytona Beach.... i do think with the lastest convection... it threw the center or it jogged to the left some... she is just off of St. Augustine

Jacksonville, FL National Weather Service Experimental Radar Loop