Wouldn't the radar see through the clouds anyway?
Not so Lephturn.  My understanding is that WW2 radar, particularly US naval radar, had a very hard time penetrating cloud/storm fronts.
Fleet ack definitely has to be toned way, way down somehow.  First night of 1.06 I had a similar experience to Mark.  Flying along at 25k in a D9, inadvertently flew within a few miles of an enemy CV group.  It was night outside, so I couldnt see the CV, but their ack gunners sure could see me alright!
4 bursts and my airframe is on fire.  20 seconds later I'm dead.
Wouldn't have been so bad except I had no idea where the CV was located, since it was so dark outside.  Kinda hard to get out of danger when you don't know where the danger is  

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When I was a child, I spake as a child, I understood as a child, I thought as a child: but when I became a man, I put away childish things. 
Chapter 13, verse 11