One of the biggest pains when there is bad wx about is, when as an LHR controller, your next planned departure... say a DVR off 27R tells you as he lines up that he'll need to look at his 'Cloud & clonk' before rolling. Quite understandable of course - so would I. If he says he needs to go straight ahead for 5 or 6 miles before turning left that's your next 5 minutes or so of deps' screwed plus you've got 3 or 4 different radar controllers to co-ordinate with. All part of life's rich pattern!
At least you're all on the ground not being hammered by the storms!
Please excuse a retired old fart coming in with his 5 pennies worth.'' Nurse, Where's my tablets!''