Lightening question

Dec 24, 2017
139
O’day 27 Oklahoma City
planning on going to my boat this evening. There’s a low chance of scattered thunderstorms during the middle of the night. If by chance there is lightening Should we not chance it? I noticed the boats mast is grounded inside the cabin. Wondering what you all do? Figure if we are all sleeping and it starts lightening we might not be awake to get out of the boat. Any advise?
Mike
 
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Sep 23, 2009
1,475
O'Day 34-At Last Rock Hall, Md
Even at alone at anchor the chance of being hit is low. In a marina with taller masts even less. With time you likely be caught many times with lightening in the area. Think of this; in 30 plus years your boat has likely never been struck, why will it his weekend? Is it supposed to be a particularly bad storm? A bigger concern might be accompanying high winds and seas.
I would chance it however its your boat and your comfort level. The boat is new and you have lots of time to build a comfort level. No need to experience a storm when you can avoid it in advance. Weather Bug app has great lightening avoidance data.
Stay safe and expand your comfort level as you gain experience.
Enjoy!
 
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May 12, 2004
1,505
Hunter Cherubini 30 New Port Richey
Lightening is OK. Lightning is not. Stay in the boat. Do not touch any metal especially the mast and stays. There's a theoretical cone of protection that runs from the top of the mast 45 degrees down to the boat. Maybe. Anyway, as was said above, your chances of being hit are small. You're safer in the cabin away from any metal. We have them all the time here in Fl. in the summer. Just a fact of life. Just stay alert in a T-storm.
 
May 12, 2004
1,505
Hunter Cherubini 30 New Port Richey
Don't beat yerself up over it. We see that here all the time. Spell check would not have caught that, anyway.:)
 
Nov 6, 2006
10,048
Hunter 34 Mandeville Louisiana
Chances are low of it striking you.. I was anchoring once in a storm where the bolt struck the water about 75 yards away. I felt a tingle from the salty rode.. and yes my laundry lady knew how bad it scared me.. but the surprising part is that my grounded mast was the tallest thing for miles.. Thunderstorms are a normal thing here.. As Roland says, inside if you can be and don't touch chainplates don't get in a direct line between the chainplate and the keel ground.. have a sip to relax.
 
May 12, 2004
1,505
Hunter Cherubini 30 New Port Richey
Several years ago in the Keys we were anchored out ready to watch the July 4th fireworks when two squall lines came over us. Lightning hitting the water everywhere. I've got this 62 foot lightning rod ready to be struck. What gets hit?...a small powerboat. Go figure!
If lightning does happen, unplug your electronics if possible. Doesn't take a direct hit to take them out.
 
Sep 23, 2009
1,475
O'Day 34-At Last Rock Hall, Md
Lightning can seem to be unpredictable. A few years ago a storm sent a fleet a large sports fishing boats back to the harbor through the Cape May NJ canal. Among them was a guy in an open small boat. A bolt by passed all the tall outriggers and went straight to him. Likely never knew what hit him.
 
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Jan 24, 2017
670
Hunter 34 Toms River Nj
Lightning strikes are rare except for me. My h34 has been struck three times that I know of. Just lucky I guess.
I'm no lightning expert, my boat just seems to be a lightning rod.

1st time I got caught in a bad t-storm in July out in the middle of Long Island sound. I don't care what anyone says when your out in a t-storm floating on a fiberglass lightning rod it will scare the living crap out of you. Like others have said it's highly unlikely to be struck by lightning but it can happen. Whenever lightning is around as others have said just use common sense and try not to touch anything that is metal. What know for a fact that saved my bacon is that I was wearing rubber gloves and boots along with my foul weather gear. I also made sure that I only had one hand on the wheel. When the strike occurred it melted my tow tether and I lost my raft.

2nd time the manager of the marina said that the mast took a strike and upon inspection I only found one burn mark on the top plate and no other damage, so in a nutshell the grounding lightning safe gaurds seem to work. I feel very safe on the boat during storms. In theory if the boat takes a hit the electricity is supposed to follow the lest path of resistance and disperse thru the keel into the surrounding water. Again in theory

Now on the hard is a different story!!!!!!!

3rd strike was on the hard. Didn't witness it but felt the aftermath In my check book.
Entire electrical system fried!!!
Radio, instruments, brand new batteries, all gone. Smoked.

So I a nut shell you will most likely win the lottery twice before your boat is struck by lightening.
Unless of course your boat is docked next to me and old sparky!!!

lol ⚡
 
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SG

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Feb 11, 2017
1,670
J/Boat J/160 Annapolis
I'm assuming your O'Day is in the water? Your mast is "up"?

If so, assuming that O'Day did what it usually did, you probably shouldn't fixate on it, noted before my post. Don't be putting yourself in line of where the path of the strike is being (partially) conducted to the "grounded" water.

If you're on a trailer or jack stands, then different things might happen -- plus you're probably not "alone" with a bunch of other masts around?
 
Jan 24, 2017
670
Hunter 34 Toms River Nj
When your on the hard, you have absolutely no lightning protection. As per my personal experience, it bounced all over the boat electrical system. As per my electrical engineer friend they highly recommended not the ground the boat to the earth when on the hard as they feel that that will attrack a strike.
 
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Jan 1, 2006
7,469
Slickcraft 26 Sailfish
Figure if we are all sleeping and it starts lightening we might not be awake to get out of the boat.
You don't have to worry about that. If there are air to ground strikes near your boat, you won't be asleep.
If I'm reading your question right you are going to be at the dock. If you can seek shelter, go ahead. If you are going to be out on the hook with your family, a scary storm experience could ruin the activity for them. You won't enjoy it either.
 
Sep 23, 2009
1,475
O'Day 34-At Last Rock Hall, Md
Ok Captain Mike, how did you make out? We hate suspense. Hopefully you didn't get fried. :eek:
 

SG

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Feb 11, 2017
1,670
J/Boat J/160 Annapolis
The problem with the attempt to believe that "not grounding" works is one of what I would call "indeterminate results".
The enormous magnitude of discharge from a lightning strike is "going somewhere(s)". It's finding a path to ground. Whether it's on it's way between the ground and sky, along the way it's going to seek a path (or paths). When one of those paths involves a conductor which can't take the sudden rise in current and (almost) instantly heats up from resistance, or it's a poor little piece of delicate human or electronic gear -- it's going to involve "frying". Lightning also "jumps" gaps in continuity. You can get arching from a little path that can't take the over current load.
The only thing about a lightning that is sure, is that it's unpredictable.

In the case of trying to isolate a boat you might be on on the hard, think about it a bit. Is the ladder that's leaning against the hull and "tied" to the boat a path? Is the grounded lead keel (even through the antifouling paint) a path? Is the wet hull rain water soaking it enough of a path?

My boat had all the through-hulls (that are metal), keel, and carbon fiber mast grounded. That's what ABYC recommends. Is it perfect? No, I think not. Is it likely to reduce catastrophic damage (like a through-hull blown-out)? I hope so. ;^)))

If you have an electronic engine control system -- as opposed to a more conventional engine starting system, you might be hugely surprised that you're "dead in the water" after a strike. I've read reports of powerboats that suffer a strike and can't start their engines, use any radios (other then little handheld VHF's, cellphones, or handheld sat communicators).

I think that anyone that gives absolute predictions about what happens or will protect from a lightning strike are probably incorrect in the real world.
 

Gunni

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Mar 16, 2010
5,937
Beneteau 411 Oceanis Annapolis
Isn’t this the time of year when Jim Cantore decends on Oklahoma to document the return of killer tornado storms? Swarms of tornados tearing stuff to pieces and tennis-ball sized hail pounding what is left standing? Shee, a little lightning action seems like nothing compared to the usual mayhem leveled upon ‘tornado alley’.
 
Jun 14, 2012
23
oday 272LE Lake Petenwell
I sail on Lake Petenwell in East Central Wisconsin where I was proud to be the first owner of an O'Day 272 in the Barnum Bay Marina. A couple years later there were five of us among the 30 or so sailboats, along with a like number of power boats. At that time 272's were the largest on the lake. One late summer afternoon a typical short thunder bumper passed through. At the dock, I buttoned up, threw something in the CD, popped a chilly and 15 minutes later the marina was back to sunshine and breezes.
The next afternoon a fellow 272 owner came down for a sail, slid the hatch open and said "Whhat the ***&&&**!". A lightning strike that no one saw or heard the previous afternoon had hit his mast, traveled the path of least resistance through the cabin and exited. The mast is grounded though the keel, but the charge chose the electronics and blew a hole in the hull to exit by way of the metal frame of the floating dock. On it's way it melted all the wiring and set fire to all the plastic and insulation. The cabin looked like the inside of a trash burner! The fire apparently self-extinguished for lack of oxygen. The boat did not have a solar vent fan!! Had the fire found any oxygen source the results could have been catastrophic for the marina. There were four more 272's and a Montego 25, all tall masts, within a 30 yd radius.
My point is, to the best of my knowledge, it was the first and only lightning-boat strike in the history of the lake, and regardless of precautions, lightning is a monumental and unpredictable force of nature.
I'm still docked at the same marina, sailing the same water on our second 272.
Think good thoughts. Today is the first day of Spring!
 
Dec 11, 2008
1,338
catalina C27 stillwater
Isn’t this the time of year when Jim Cantore decends on Oklahoma to document the return of killer tornado storms? Swarms of tornados tearing stuff to pieces and tennis-ball sized hail pounding what is left standing? Shee, a little lightning action seems like nothing compared to the usual mayhem leveled upon ‘tornado alley’.
I sail in Oklahoma. It gets pretty hairy sometimes 'round here in the springtime...
 
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