Hey Folks,
I'll throw my half-penny in for the folks with smaller CDs. My wife and I have ridden out several pop-up thunderstorms, which are common here in the southeast during the summer.
We gunkhole on Lake Wateree and are usually anchored in a cove with a bow and stern anchor. When a thunderstorm comes we do like Thataway, we put down all antennas, turn off all electrical devices and turn the batteries off.
My wife will get up in the bow berth and I'll put a throwable cushion on the deck between the seats and sit there. The little CD 16 Cruiser goes bow heavy with two adults in the forward section so any rainwater runs forward. In a pop-up thunder storms there is heavy rain, lots of lightening and high winds. Fortunately, they are usually of short duration.
As a side note: We keep several Folgers plastic coffee cans (big ones and little ones) on board as they are excellent to store toilet paper and other small items in that you don't want wet.
They are also excellent for bailing out water, catching rain water, can be used for emergency anchors, etc. They can also be used as emergency floatation devices.
Anyway...just my half-penny for us smaller CDers.
Take care and be safe out there.
Spuncopper