Hello angus99.
Of course there are options but you're a man with a mission: head north, SAFELY.
My favorite option during thunder-boomer season is to be secure before the rain starts. That might mean a very short day, or it might mean a two hour break for the weather to pass. Laziness too may mean I relax and enjoy life versus continuing on any one particular day.
It's not a race. Even if it were a race, I've already won: I have the boat.
When it comes time to move Seaweed I'm shooting for perfection. I want smooth or a light chop and nothing more. There's no reason for me to beat myself or the boat just to say "I made it here on schedule"
Choppy and rough forecasts mean I sit tight. Even a moderate chop isn't travelling weather for me. And fetch counts -- those long stretches can build fast, but if weather is good in the morning, there's nothing wrong with going for five, or 25 miles and pulling in for a break until the next day.
On the east coast doing the Intracoastal you will see lots of potential stopping points. Simply make sure you have one every few miles and even inclement weather won't matter. Skipper Bob's is a good guide, along with Kettlewell's newest ICW chartkit.
This presumes you wish to anchor! If you're marina hopping, you'll want Skipper Bob's and the Waterway Guide for marina information, along with ActiveCaptain.
There's no rule that says you cannot anchor for an hour and then keep going and even end up in a marina for the night. I've stopped just for lunch, then continued an hour later. If you're comfy with your anchor system, consider anchoring during the thunderstorm and then continuing on if you're up for it.
I'm sure you'll be fine. NOAA has been pretty accurate of late.
Good luck and have fun, safely!